CN111756168A - A maglev flywheel energy storage motor generator - Google Patents

Abstract

A magnetic levitation flywheel energy storage motor generator has an integrated one-time heat dissipation system of a vacuum shell, a flywheel, a rotor, a stator iron core, a stator shaft and an auxiliary bearing; without relying on an external power supply, the flywheel energy storage is in standby. In the mode and power generation mode, the flywheel power generation mode operation is realized to supply power to the magnetic suspension bearing, so that the flywheel shaft is self-suspended, which is conducive to the independent operation and transportation transfer of the flywheel energy storage; the self-evacuating device of the turbine vane pump rotor reduces the energy of the flywheel energy storage system. consumption, and its power density is improved.

Description

A maglev flywheel energy storage motor generator

technical field

The invention belongs to the technical field of flywheel energy storage motor, generator and new energy, and relates to a magnetic suspension flywheel energy storage motor generator.

Background technique

For trains and automobiles, this kind of vehicle adopts the hybrid propulsion of internal combustion engine and electric motor, and the flywheel battery charges quickly and discharges completely, which is very suitable for use in vehicles propelled by hybrid energy. During normal driving and braking, the flywheel battery is charged, and the flywheel battery provides power to the vehicle when accelerating or climbing to ensure that the vehicle runs at a stable and optimal speed, which can reduce fuel consumption. consumption, air and noise pollution, maintenance of the engine, prolonging the life of the engine.

The super capacitor energy storage bus is driven by the on-board capacitor, and the mileage is only 8~10 kilometers per charge in 30 seconds. The area is greatly restricted.

As an alternative to chemical batteries and supercapacitors, flywheel energy storage systems have the advantages of long life, low maintenance, high efficiency and high power. The flywheel energy storage relies on the inertia of the rotating flywheel rotor to convert electrical energy into kinetic energy and store it to realize uninterrupted power supply in the event of a power outage. When the flywheel rotates at high speed for a long time, the calorific value of the rotor is relatively large. In the case of concentrated discharge of large current, the calorific value of the stator is relatively large. If the heat cannot be dissipated in time, the excessive temperature will cause damage to the stator and rotor, resulting in The entire machine is damaged. At the same time, the flywheel energy storage device is a high-speed rotating mechanical device, and the bearing system is its key component. The lubrication and heat dissipation effect of the bearing is also the key to the reliable operation of the entire system.

At present, the representative related technologies related to flywheel energy storage include the following: CN201720695674.7 discloses a high energy storage flywheel system overall cooling device, CN201811189965.4 discloses a self-suspended flywheel battery multi-mode drive control system, CN201811189965.4 201820664428.X discloses a self-evacuated storage tank.

The existing high-speed maglev flywheel has the following four defects.

1. The supporting structure of the existing high-speed flywheel adopts the structure of the permanent magnet and the rotor iron core. When the flywheel rotates at high speed, the harmonics of the high-frequency air gap magnetic field will generate a large amount of eddy current losses on the permanent magnet or the rotor iron core.

2. The generated eddy current causes the rotor to heat up. Since the flywheel energy storage rotor or the flywheel motor rotor operates in a vacuum environment, the heat emitted by the rotor is difficult to radiate and dissipate, which reduces the number of operations per unit time of the flywheel energy storage system at rated power and capacity.

3. The flywheel energy storage and heat dissipation system cannot take into account the integrated one-time heat dissipation of the vacuum shell, flywheel, rotor, stator core, stator shaft and auxiliary bearing at the same time.

4. The suspension winding in the bearingless permanent magnet synchronous motor must be continuously powered. Except for the charging mode of the flywheel energy storage, the external power supply can be connected. In other cases, such as standby and power generation modes, there is no corresponding external power supply. , the mechanical shaft cannot be suspended, or connected to other battery power supplies for emergency power supply, and the independent operation and transportation of the flywheel battery cannot be realized.

5. An external vacuum system is used to vacuum the flywheel energy storage products, which is not economical, consumes a lot of energy, and is difficult to control. Moreover, due to the limitation of space and installation position, the molecular image has a certain distance from the vacuum chamber, which is difficult to vacuum. increase.

SUMMARY OF THE INVENTION

In view of this, to overcome the above-mentioned defects in the prior art, and to solve the problem of the difficulty in dissipating heat in each flywheel energy storage system under vacuum conditions, the purpose of the present invention is to propose a magnetic levitation flywheel energy storage motor generator, which can realize the vacuum housing, the flywheel and the flywheel. , Integrated one-time heat dissipation of rotor, stator core, stator shaft and auxiliary bearing.

In the case of not relying on external power supply, flywheel energy storage in standby mode and power generation mode to achieve flywheel power generation mode

The operation supplies power to the magnetic suspension bearing to make the flywheel shaft self-suspend, which is beneficial to the independent operation and transportation of the flywheel energy storage.

The turbine vane pump rotor self-evacuation device reduces the energy consumption of the flywheel energy storage system.

For solving the above-mentioned technical problems, the technical scheme adopted in the present invention is:

A magnetic suspension flywheel energy storage motor generator, Figures 1-4 include a vacuum casing 101, a flywheel assembly 119, a magnetic suspension bearing system, a motor/generator, a hollow shaft 133 of a stator core, a dynamic seal ring 150, and an auxiliary bearing 148 , a cooling system and a self-evacuating device form a vacuum chamber; the flywheel assembly 119 integrates multiple magnetic bearing motors and permanent magnet outer rotors of the motor/generator; the stator core windings of the multiple magnetic bearing motors are energized , the radial and axial suspension support of the flywheel assembly 119 is generated, and the stator core winding 125 of the motor is energized to drive the flywheel assembly to rotate. At this time, the flywheel assembly becomes the energy storage mode; when the speed of the flywheel assembly 119 reaches When the preset value is used, the motor is converted into the generator mode, the flywheel is always in the energy release and discharge mode, and the inertial potential energy of the flywheel assembly 119 is used to do work to the generator, and the generator permanent magnet of the flywheel assembly is used. The outer rotor 122 cuts the stator iron core winding 125 of the generator to generate induced current, which is rectified and stabilized to supply power to the load user; the power controller system implements electrical energy storage, conversion and recombination.

As an embodiment of the present invention, the vacuum casing 101 shown in FIG. 2 is a round can-shaped structure, including a casing body 102 , a casing bottom 103 and a casing cover 104 , and the casing body 102 and the casing bottom 103 are One body; the shaft center of the casing bottom 103 and casing cover 104 is provided with the hollow shaft head sleeve 134 of the stator iron core, the splined shaft sleeve 147, the dynamic sealing ring groove 151, the built-in pump body 157 and the The hollow shaft sleeve 112 of the flywheel assembly is provided with a concave annular groove cooling channel 113 on its inner circle; the casing body 102, the casing bottom 103 and the casing cover 104 have built-in spiral cooling channels 108 and vortex cooling channels The vortex-shaped cooling channel 109 communicates with the casing bottom 103 and the casing cover 104 and the inner circular concave annular groove cooling channel 113 of the hollow rotating shaft sleeve 112 of the flywheel assembly. The cooling liquid flows from one end of the cooling channel 113 of the inner circular concave annular groove of the hollow rotating shaft sleeve 112 of the flywheel assembly into the cooling channel 113 of the inner circular concave annular groove of the hollow rotating shaft sleeve 112 of the flywheel assembly, and flows out. ; The casing body 102 and the casing cover 104 are tightly connected by screws and sealants, and the vacuum casing 101 is made of aluminum-titanium alloy and the outer layer is wrapped with carbon fiber resin composite material.

Further, a mortise-and-mortise structure is provided at the connecting portion of the casing body 102 and the casing cover 104 .

As an embodiment of the present invention, the flywheel assembly shown in FIG. 2 is cylindrical, and the upper and lower disks are supported by an umbrella-shaped structure, including the magnetic suspension bearing motor and the permanent magnet outer rotor 122 of the motor/generator, the flywheel body 105 and the flywheel. The upper and lower support discs constitute the flywheel assembly 119; the upper and lower support discs are provided with the hollow shaft 111 of the flywheel assembly, the auxiliary bearing insert groove 149, the dynamic seal ring insert groove 151 and the diversion compressed gas circular hole 118; the flywheel body 105 The spiral cooling channel 108 and the vortex-shaped cooling channel 109 are built into the upper and lower support plates and communicate with each other. The vortex-shaped cooling channel 109 and the hollow shaft 111 of the flywheel assembly are cooled by the outer and inner concave annular grooves. The through holes of the flow passages 113 are connected to each other, and the coolant flows from one end of the outer circular concave ring groove of the hollow rotating shaft 111 to the outer circular concave ring groove of the hollow rotating shaft 111 at the other end and flows out; the flywheel assembly is made of permanent magnets And multi-layer wrapped carbon fiber resin composite material.

Further, the inner circumferentially embedded magnetic bearing motors M1, M2, M3 and the permanent magnet outer rotor 122 of the motor/generator of the flywheel assembly are filled with epoxy resin, and the epoxy resin glue is glued with the flywheel assembly. Same week.

Further, the flywheel body 105 and the lower support disc 107 are integrally constructed, and the flywheel body 105 and the flywheel upper support disc 106 are fastened with screws and sealants.

Further, the connection part of the flywheel body 105 and the flywheel upper support plate 106 is provided with a tenon-and-mortise structure.

As an embodiment of the present invention, the built-in helical cooling flow channel 129 of the stator iron core of the motor/generator shown in FIG. 4 communicates with the cooling flow channel of the hollow shaft 133 of the stator iron core. The hollow shaft 133 of the stator iron core has a cavity cooling channel that flows in from one end to the other end and flows out; the motor/generator is a switched reluctance motor, a stepping reluctance motor, an iron core permanent magnet motor and an iron core permanent magnet motor , its rotor is an inner and an outer rotor structure.

Further, the magnetic bearing motors M1, M2 and M3 are arranged coaxially with the motor/generator, and the permanent magnets of the magnetic bearing motor and the motor/generator are circumferentially embedded in the flywheel assembly to form a plurality of magnetic bearing motors and motor/generators. The shared flywheel permanent magnet outer rotor.

Further, the power of the motor/generator is much greater than the sum of the powers of the magnetic bearing motors M1, M2 and M3, the external vacuum pump motor, the circulating pump motor of the cooling channel radiator and the fan motor.

As an embodiment of the present invention, the magnetic suspension bearing system shown in FIGS. 3-4 includes magnetic suspension bearing motors M1, M2, M3, a flywheel assembly 119, a hollow shaft 111 of the flywheel assembly, and an auxiliary bearing 148; the magnetic suspension bearing motor The stator core windings 123 of M1 and M2 are energized, forcing the auxiliary bearing 148 of the hollow shaft 111 of the flywheel assembly to suspend radially, and the stator core winding 124 of the magnetic suspension bearing motor M3 is energized, forcing the hollow shaft 111 of the flywheel assembly to be energized The auxiliary bearing 148 is suspended axially, and the flywheel assembly 119 is in a radial and axial rotational suspension support state; wherein the magnetic suspension bearing motors M1 and M2 are rotary motors, and the magnetic suspension bearing motor M3 is a disc motor, so The magnetic suspension bearing motors M1 and M2 are placed in the motor/generator symmetrically, and the magnetic suspension bearing disc motor M3 is a disc motor that is placed inside the flywheel upper support plate 106, and the flywheel upper support plate 106 inner rotor bracket The magnetic suspension bearing disc motor M3 permanent magnet is provided, and the auxiliary bearing 148 is a ceramic bearing.

Further, the built-in helical and eddy current cooling channels 129 of the stator iron cores of the magnetic bearing motors M1, M2, and M3 communicate with each other with the cooling channels of the hollow shaft 133 of the stator iron core, and the cooling fluid flows from the stator core. The hollow shaft 133 of the iron core flows into the cooling channel at one end and flows out at the other end.

The magnetic suspension bearing motor is a switched reluctance motor, a stepping reluctance motor, an iron core permanent magnet motor and an iron core permanent magnet motor, and the rotors are of inner and outer rotor structures and are coaxial.

Further, the current size of the stator iron core windings 123 of the magnetic suspension bearing motors M1 and M2 is adjusted by PWM control, the axial suspension gap of the auxiliary bearing 148 of the hollow shaft 111 of the flywheel assembly is adjusted, and the magnetic suspension bearing disc motor M3 is adjusted by PWM control. The current size of the stator core winding 124 is adjusted to adjust the radial suspension clearance of the auxiliary bearing 148 of the hollow shaft 111 of the flywheel assembly.

As an embodiment of the present invention, the outer circle of the hollow shaft 133 of the stator iron core shown in FIG. 4 is a stepped shape and its inner circle is a Y-shaped three-cavity structure. The outer circle of the hollow shaft 133 of the stator iron core includes a shaft head and a journal. 144. The shaft ring 145, the shaft body and the stator core support 141, the shaft head is tubular, the end of the shaft journal 144 is a spline shaft 142, and the shaft journal 144 is provided with an outer circular concave ring groove cooling channel 113 points. A flow hole and an auxiliary bearing 148, the inner ring of the auxiliary bearing 148 is tangent to the collar 145, the shaft body is provided with a plurality of cooling flow channel interfaces, and the plurality of cooling flow channel interfaces are connected with the plurality of the stator irons The core helical cooling channels 129 pass through each other, the hollow shaft support 141 of the stator core is provided with a concave keyway, and the keyway intersects with a plurality of convex teeth on the inner circle of the stator core, and the spline shaft 142 intersects and tangents to the spline shaft sleeve 147 of the casing bottom 103 and the casing cover 104; the inner circle of the hollow shaft 133 of the stator iron core includes a cooling channel 135 with a cavity, a cable channel 136 with two cavities, Three-cavity suction and vacuum channel 137, the one-cavity cooling channel tube is provided with the outer circular concave ring groove of the journal 144 and the through hole of the cooling channel 113 and the inner circular concave ring groove of the hollow shaft 111 of the flywheel assembly for cooling The through holes of the flow channel 113 are tangent to each other; the two-cavity cable channel 136 and the two-cavity shaft body are provided with through holes, and the stator core winding cable leads pass through the through holes to connect to the power controller; The three-cavity suction vacuum channel 137, the three-cavity shaft body is provided with a plurality of suction and suction vacuum through holes 139, wherein the hollow shaft 133 of the stator core is made of non-magnetic metal and carbon fiber resin composite material.

As an embodiment of the present invention, the cooling system shown in FIGS. 1-4 includes a cooling flow channel for an external vacuum casing, a cooling flow channel for a flywheel assembly, a cooling flow channel for the stator core, and a cooling channel for the hollow shaft 133 of the stator core. It is integrated with the cooling channel of the auxiliary bearing 148; the cooling channel flows into the cooling channel at one end of the cavity of the hollow shaft 133 of the stator core, and passes through the journal 144 of the hollow shaft of the stator core. The through hole of the cooling channel 113 of the circular concave annular groove is divided into the through hole of the cooling channel 113 of the inner circular concave annular groove of the hollow rotating shaft 111 of the flywheel assembly, and the outer circular concave annular groove of the hollow rotating shaft 111 of the flywheel assembly The through hole of the cooling channel 113 is divided into the inner concave annular groove cooling channel 113 of the hollow rotating shaft sleeve 112 of the flywheel assembly of the casing bottom 103 and the casing cover 104, and converges to the hollow shaft 133 of the stator core. The outlet of the cooling flow channel at the other end of the cavity of the shaft head, the inlet and outlet of the cooling flow channel of the cavity of the hollow shaft 133 of the stator iron core is connected to an external radiator and a circulating pump for circulating cooling.

The through hole of the outer circular concave annular groove cooling channel 113 of the journal 144 of the hollow shaft 133 of the stator iron core is tangent to the through hole of the inner circular concave annular groove cooling channel 113 of the hollow shaft 111 of the flywheel assembly .

The through hole of the outer circular concave annular groove cooling flow channel 113 of the hollow rotating shaft 111 of the flywheel assembly and the cooling flow of the concave annular groove in the hollow rotating shaft sleeve 112 of the flywheel assembly of the casing bottom 103 and the casing cover 104 Road 113 is tangent.

Further, the auxiliary bearing 148 is tangent to the cooling channel of the hollow shaft 133 of the stator core, and the cooling channel of the hollow shaft 133 of the stator core is used for the cooling channel of the auxiliary bearing 148 . cool down.

As an embodiment of the present invention, the self-evacuating device shown in FIGS. 1-3 includes a built-in pump body 157, a pump rotor 159, a turbine blade 155, a self-evacuating air outlet 158, a one-way valve and a vacuum pressure gauge; the The built-in pump body 157 is embedded in the inner side of the casing bottom 103 and the casing cover 104, and the inner sides of the casing bottom 103 and the casing cover 104 are provided with a plurality of self-evacuating exhaust holes. A plurality of exhaust holes communicate with the external vacuum exhaust outlets of the casing bottom 103 and the casing cover 104 through a plurality of conduits built in the casing bottom 103 and the casing cover 104, and the vacuum exhausting The air outlet is provided with a one-way valve and a vacuum pressure gauge; the hollow shaft 111 of the flywheel assembly is tangentially intersected with the stepped outer circular concave keyway and the inner circular convex teeth of the pump rotor 159, and is locked with a latch; the pump rotor 159 and the The hollow shaft 111 of the flywheel assembly rotates synchronously; the pump rotor 159 and the turbine blade 155 are made of carbon fiber resin composite material.

Further, during the working process of the self-evacuating device, the pump rotor 159 is installed on the outer circular shaft of the hollow shaft 111 of the flywheel assembly. When the flywheel assembly rotates, the pump rotor 159 rotates with it, and the pump rotor 159 The turbine blade 155 is driven to rotate, and the gap air between the flywheel assembly 119 and the magnetic suspension bearing motors M1, M2, M3 and the motor/generator flows to the turbine blade 155 through the guide compressed air circular holes 118 of the upper and lower support plates, and at the same time The air in the gap between the vacuum casing and the flywheel assembly 119 flows to the turbine blades 155, and as the turbine blades 155 continue to rotate, the air flows to the plurality of exhaust holes located inside the casing bottom 103 and the casing cover 104. The plurality of exhaust holes are connected to the self-evacuating air outlet 158 by pipes, and the air is discharged from the self-evacuating air outlet 158 .

Further, the upper part of the self-evacuating device is a turbo molecular pump and the lower part is a traction molecular pump, which is a double-pump superimposed composite molecular pump body.

Further, the external vacuuming device includes a vacuum cavity for accommodating the flywheel assembly, the hollow shaft of the stator core, the dynamic seal ring, the auxiliary bearing, the magnetic suspension bearing motors M1, M2, M3 and the motor/generator. The three cavities of the hollow shaft shaft body of the stator iron core are provided with a plurality of suction vacuum air ports and the circular holes for guiding compressed air in the upper and lower support plates of the flywheel assembly 119 are connected to each other for suction and suction of the vacuum casing, the The air in the gap between the flywheel assembly 119 and the stator iron core winding, the three cavities of the hollow shaft shaft head of the stator iron core are provided with a one-way valve, and the one-way valve communicates with the external vacuum pump exhaust port, wherein the machine The cover is provided with a vacuum pressure gauge.

As an embodiment of the present invention, the power controller system shown in Figures 5-6 includes an external power supply module, a super capacitor module, a DC-DC/AC step-up and step-down converter, an automatic switching module 152, and a magnetic suspension bearing motor control module and motor/generator drive module and rectifier voltage regulator module; when the external power supply module supplies power, the current of the magnetic suspension bearing motors M1, M2, M3 stator core windings is controlled by PWM, forcing the flywheel assembly auxiliary bearing 148 radial and axial suspension, restart the motor drive module, the stator iron core winding 125 of the motor is turned on, the rotor of the flywheel assembly 119 rotates at a high speed, and the flywheel assembly becomes the energy storage charging mode; when the rotational speed reaches the preset value , the power supply of the magnetic bearing motors M1, M2, and M3 is automatically switched to the super capacitor module power supply mode, and the startup enters the flywheel assembly energy retention operation mode; when the external load requires energy, the flywheel assembly 119 to the generator Doing work, the permanent magnet of the generator in the flywheel assembly 119 cuts the stator core winding 125 of the generator to generate an induced current, which is rectified and stabilized to output electrical energy to the DC bus, which supplies power to the load user, and the The flywheel assembly 119 is in the energy-releasing discharge mode; when the speed of the flywheel assembly 119 gradually drops to zero, the switch connecting the power controller and the external load is disconnected, and the magnetic suspension bearing motor control switch is disconnected, and the flywheel is always connected. 119 completely enter the shutdown mode; wherein part of the electric energy generated by the generator is stepped down through the DC-DC converter to alternately charge the Sc1 and Sc2 supercapacitor modules; the Sc1 and Sc2 supercapacitor modules pass through the DC-DC The DC converter boost alternately provides the flywheel assembly 119 levitation power to the magnetic bearing motors M1, M2, M3; secondly, the charging and discharging of the Sc1 and Sc2 supercapacitor modules are always automatically switched to the state; when the Sc1 supercapacitor mode When the battery power is lower than the preset value, the DC-DC converter automatically switches to the discharge mode of the Sc2 supercapacitor module, and the DC-DC converter of the Sc1 supercapacitor module automatically switches to the charging mode.

Further, the working mode of the Sc supercapacitor module: the Sc1 supercapacitor module is charged at the same time, and the Sc2 supercapacitor module is in the discharge mode, on the contrary, the Sc1 supercapacitor module is discharged, and the Sc2 supercapacitor module is in the charging mode.

Further, the power controller also includes a high-voltage insulation monitoring module, a detection and acquisition diagnosis module, and a cooler device. The high-voltage insulation monitoring module is used to monitor leakage current faults in real time and disconnect all power sources in the circuit; the detection and diagnosis module It is used for the safe operation of voltage, current, speed, temperature, overvoltage and overcurrent protection of drive motors and generators; the cooler device is composed of multi-layer oil cooling, air cooling, liquid cooling, cooling pipes and heat sinks. Power control cooling.

The power controller inverter circuit diagrams 5-6 include an external power supply module, a DC-DC/AC boost converter, a Sc supercapacitor module DC/DC boost converter, and a Sc supercapacitor module DC/DC step-down The converter, the magnetic suspension bearing motor M1, M2, M3 control and the DC/AC converter of the motor, the generator output rectification voltage stabilization module and the automatic switching module are composed.

External power module DC/DC boost converter Figure 5: The boost DC chopper circuit consists of an external power module ECU, a reactor L1, an insulated gate bipolar transistor VT20, a diode D19 and a capacitor C2; when boosting, the external power The module ECU turns on and off the control pole of the insulated gate bipolar transistor VT20, of which the insulated gate bipolar transistor VT20 acts as a switch, so that the induced electromotive force on the reactor L1 and the external power module DC220V voltage are superimposed to provide high-voltage power to the busbar Power supply composition.

The DC-AC converters of the magnetic bearing motors M1, M2, and M3 are shown in Figure 5-6, which converts the DC500V of the DC bus into AC500V, and supplies power to the magnetic bearing motors M1, M2, and M3. The insulated gate bipolar transistors VT1-VT6, Freewheeling diodes D1-D6, insulated gate bipolar transistors VT7-VT12, freewheeling diodes D7-D12, insulated gate bipolar transistors VT13-VT18, freewheeling diodes D13-D18 and capacitor C2 form a voltage-type three-phase bridge type inverter circuit.

Further, if the trigger signal frequency and time of VT1~VT6, VT7~VT12, VT13~VT18 are changed, the phase of the stator core winding current space phasor corresponding to the inverter input magnetic bearing motor M1, M2, and M3 can be changed. and amplitude to adapt to the magnetic suspension control of the magnetic suspension bearing motors M1, M2, and M3.

The DC-AC converter of the motor is shown in Figure 5. It converts the DC500V of the DC bus into AC500V, and supplies power to the motor. The automatic switching module 153 VT31 and VT32 are turned on, and the insulated gate bipolar transistors VT40-VT45 and freewheeling diodes D40-D45 , and capacitor C2 to form a voltage-type three-phase bridge inverter circuit.

Further, the control pole of insulated gate bipolar transistor is triggered by the external power supply ECU, so that VT1~VT6, VT7~VT12, VT13~VT18, VT40~VT45 are quickly turned on and off, and the DC500V direct current is forcibly converted into three-phase AC500V alternating current.

Rectification and voltage stabilization module Figure 6, the alternating current output by the generator is converted into direct current, and the unidirectional conductivity of diodes D46-D51 is used to rectify the alternating positive and negative sinusoidal alternating voltage of the alternating current output into a one-way pulsating direct current voltage, The rectified DC power with large pulsation is converted into smooth DC power, and the power is output to the load user and the Sc supercapacitor module DC/DC step-down converter.

Sc supercapacitor module DC/DC step-down converter Figure 6, Sc1 supercapacitor module DC/DC step-down converter and Sc2 supercapacitor module DC/DC step-down converter.

Among them, the Sc1 supercapacitor module DC/DC step-down converter is shown in Figure 6. The step-down DC chopper circuit is composed of a generator rectifier, an insulated gate bipolar transistor V23 diode D24 reactor L3, and a capacitor C5; The capacitor module ECU uses the insulated gate bipolar transistor VT23 to turn on, step down the DC800V to an average DC220V DC voltage, and charge the Sc1 super capacitor module.

Among them, the Sc2 supercapacitor module DC/DC step-down converter is shown in Figure 6. The step-down DC chopper circuit is composed of a generator rectifier, an insulated gate bipolar transistor V27, a diode D28, a reactor L5, and a capacitor C7. The Sc2 supercapacitor module ECU uses the insulated gate bipolar transistor V27 to turn on, and steps down the DC800V to an average DC220V DC voltage to charge the Sc2 supercapacitor module.

Further, the alternating current output by the generator is converted into direct current, which is turned on to the load output voltage through the switches VT33 and VT34.

Sc supercapacitor module DC/DC boost converter Figure 6, consists of Sc1 supercapacitor module DC/DC boost converter and Sc2 supercapacitor module DC/DC boost converter.

Among them, the Sc1 supercapacitor module DC/DC boost converter is shown in Figure 6. The boosted DC chopper circuit is composed of the Sc1 supercapacitor module ECU, the reactor L2, the insulated gate bipolar transistor VT22, the diode D21 and the capacitor C2; When the voltage is pressed, the Sc1 supercapacitor module ECU turns on and off the control pole of the insulated gate bipolar transistor VT22, of which the insulated gate bipolar transistor VT22 acts as a switch, making the induced electromotive force on the reactor L2 and the Sc1 supercapacitor mode. The group of DC220V voltage superposition provides high-voltage power supply to supply power to the bus.

Among them, the Sc2 supercapacitor module DC/DC boost converter is shown in Figure 6. The boosted DC chopper circuit is composed of the Sc2 supercapacitor module ECU, the reactor L4, the insulated gate bipolar transistor VT26, the diode D25 and the capacitor C2; When the voltage is pressed, the Sc2 supercapacitor module ECU turns on and off the control pole of the insulated gate bipolar transistor VT26, of which the insulated gate bipolar transistor VT26 acts as a switch, making the induced electromotive force on the reactor L4 and the Sc2 supercapacitor mode. The group of DC220V voltage superposition provides high-voltage power supply to supply power to the bus.

The automatic switching module 152 as shown in Figure 5, is turned on or off by the insulated gate bipolar transistors VT29 and VT30 to control the Sc supercapacitor module DC/DC boost converter to boost and discharge the DC bus, wherein the external power module HV ECU power supply is turned off, That is, the automatic switching module 152 is turned on, and the Sc supercapacitor module boosts and discharges the DC bus. On the contrary, the automatic switching module 152 is turned off, that is, the external power module HV ECU is turned on, and the external power module HV ECU passes the boost converter to the DC bus. Boost discharge.

The automatic switching module 153 as shown in Figure 5-6, is controlled by the conduction of the insulated gate bipolar transistors VT31 and VT32 to control the DC bus to supply power to the motor drive circuit, in which the external power module HV ECU supplies power, that is, the automatic switching module 153 is turned on, and the DC bus boost circuit Power is supplied to the motor drive circuit, the power supply of the external power supply module HV ECU is turned off, and the automatic switching module 153 is turned off to control, that is, the flywheel assembly is converted into standby and energy discharge mode.

The ECU control adopts a 64-bit computer, and receives data from the motor/generator, magnetic bearing motor, magnetic bearing disc motor, external power module HV, Sc super capacitor module, cooling and cooling system, self-evacuating device and external vacuuming device. Voltage, current, pressure, temperature, rotational speed, angle sensor information; according to this information, the calculated result is converted into a control signal, and the comparison and calculation results are used to suspend the magnetic force of the magnetic bearing motor and magnetic bearing disc motor, as well as the motor / Control of torque, power, pressure and temperature required by the generator.

The control core component of the motor/generator is the external power supply HV ECU or Sc super capacitor module ECU. In the external power supply HV ECU or Sc super capacitor module ECU, the inverter converts the output current of the motor to the insulated gate bipolar type. The drive control circuit of the transistor module and the microprocessor of the inverter control the inverter circuit; the motor speed command stored by the microcomputer is compared with the speed feedback signal of the motor angle sensor, and the speed controller outputs a DC current command signal. The rotor magnetic pole position signal of the angle sensor is multiplied to obtain the current command signal required for the operation of the motor, and the actual working current signal of the tracking motor is referenced. After calculation by PWM comparator or pulse width modulation, it is converted into a switching signal output; the signal is output through the isolation circuit Afterwards, it directly drives the inverter inverter circuit modules VT40~VT45 to quickly turn on and off the control poles, so as to realize the purpose of inversion, commutation and orientation of the output current of the inverter.

The control of the magnetic suspension system of the magnetic suspension bearing motor M1, M2 and M3 is shown in Fig. 5-6.

The control core components of the magnetic suspension bearing motor M1, M2, M3 magnetic suspension bearing system are the external power supply HVECU or Sc super capacitor module ECU. In the external power supply HV ECU or Sc super capacitor module ECU, the frequency converter controls the magnetic suspension bearing motor M1. , The drive control circuit of the insulated gate bipolar transistor module for the output current conversion of M2 and M3, the microprocessor of the inverter to control the inverter circuit; The speed feedback signals of M2 and M3 angle sensors are compared, and the speed controller outputs a DC current command signal, which is multiplied with the rotor magnetic pole position signals of the magnetic bearing motors M1, M2, and M3 angle sensors to obtain the magnetic bearing motors M1, The current command signal required for the operation of M2 and M3 refers to the actual working current signal of the tracking magnetic bearing motor M1, M2 and M3, and is converted into a switching signal output after calculation by PWM comparator or pulse width modulation; after the signal passes through the isolation circuit, The control poles of the inverter circuit modules VT1-VT6, VT7-VT12 and VT13-VT18 are directly driven to turn on and off quickly, so as to realize the purpose of radial and axial suspension support of the flywheel assembly 119.

As an embodiment of the present invention, there are described new energy electric vehicles, electric generators and sets.

Compared with the prior art, the beneficial effects of the present invention are as follows.

(1) In the case of not relying on external power supply, the flywheel assembly stores energy in standby mode and power generation mode, and realizes the self-running power supply mode of the magnetic levitation bearing motor, which makes the rotating shaft of the flywheel assembly self-suspend, which is beneficial to the energy storage of the flywheel assembly. Independent operation and transport transfer.

(2) To achieve integrated one-time heat dissipation, the vacuum casing cooling channel, the flywheel assembly cooling channel, the stator core cooling channel, the stator core hollow shaft cooling channel and the auxiliary bearing cooling channel are integrated. Improves the power density of flywheel energy storage and energy release.

(3) Self-evacuating device and turbo pump rotor make the flywheel energy storage system further energy-saving.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

Reference signs: vacuum casing 101; casing body 102; casing bottom 103; casing cover 104; flywheel body 105; flywheel upper support plate 106; flywheel lower support plate 107; runner 109; hollow shaft 111 of flywheel assembly; hollow shaft sleeve 112 of flywheel assembly; concave annular groove cooling runner 113; magnetic bearing motor M1; magnetic bearing motor M2; magnetic bearing disc motor M3; diversion compression Air hole 118; flywheel assembly 119; permanent magnet outer rotor 120 of magnetic bearing motors M1 and M2; permanent magnet outer rotor 121 of magnetic bearing disc motor M3; permanent magnet outer rotor 122 of motor/generator; magnetic bearing motor The stator core winding 123 of M1 and M2; the stator core winding 124 of the magnetic bearing disc motor; the stator core winding 125 of the motor/generator; the stator core helical cooling channel 129; the stator core hollow shaft 133 ; Hollow shaft sleeve 134 of stator core; One-cavity cooling channel channel 135; Two-chamber cable channel 136; Three-chamber suction vacuum channel 137; Cooling flow channel interface 138; 140; stator core bracket 141; spline shaft 142; shaft head 116; journal 144; collar 145; spline bushing 147; auxiliary bearing 148; auxiliary bearing insert groove 149; slot 151; maglev flywheel energy storage motor generator assembly 115; turbine blade 155; pump rotor 159; built-in pump body 157; self-evacuating air outlet 158; motor/generator 156; automatic switching module 152; Sc1 supercapacitor module charging; Sc2 supercapacitor module.

Description of drawings

FIG. 1 is a schematic diagram of a cutting structure of a magnetic levitation flywheel energy storage motor generator assembly according to an embodiment of the present invention.

FIG. 2 is a schematic view of the cutting structure of a magnetic suspension flywheel energy storage motor generator vacuum casing and a turbo pump rotor according to an embodiment of the present invention.

3 is a schematic diagram of a cutting structure of a magnetic levitation flywheel energy storage flywheel assembly according to an embodiment of the present invention.

4 is a schematic view of the hollow shaft cutting structure of the magnetic suspension flywheel energy storage motor generator magnetic suspension bearing motor and the motor/generator and the stator iron core according to the embodiment of the invention.

FIG. 5 is a schematic diagram of a charging mode circuit of a magnetic levitation flywheel energy storage motor generator flywheel assembly according to an embodiment of the present invention.

FIG. 6 is a schematic diagram of the circuit principle of the standby and discharge mode of the flywheel assembly of the magnetic levitation flywheel energy storage motor generator flywheel assembly according to the embodiment of the present invention.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are not only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

Example 1: Please refer to Figures (1-4).

Step 1. Specific assembly steps, the magnetic suspension flywheel energy storage motor generator assembly 115 is generally assembled.

Step 2. The stator core winding 125 of the motor/generator is assembled with the hollow shaft 133 of the stator core: the inner circular convex keyway of the stator core winding 125 of the motor/generator is aligned with the outer circle of the hollow shaft 133 of the stator core Recessed keyway, press-fit to lock.

Step 3. Assemble the two stator iron core windings 123 of the magnetic suspension bearing motor with the hollow shaft 133 of the stator iron core: The inner circular convex keyway of the two stator iron core windings 123 of the magnetic suspension bearing motor is aligned with the outer circle of the hollow shaft 133 of the stator iron core Recessed keyway, press-fitted and locked, placed on the stator core winding 125 of the motor/generator for two symmetrical measurements.

Step 4. Assemble the stator core winding 124 of the magnetic bearing disc motor with the hollow shaft 133 of the stator core: the inner circular convex keyway of the stator core winding 124 of the magnetic bearing disc motor is aligned with the hollow shaft 133 of the stator core External circular concave keyway, press-fit to lock.

Step 5. The cables of the stator core winding 125 of the motor/generator, the stator core winding 123 of the magnetic bearing motor and the stator core winding 124 of the magnetic bearing disc motor pass through the cable lead-out holes of the hollow shaft 133 of the stator core 140 leads to a two-chamber cable channel 136 for connection within the power controller.

Step 6. Cooling of the helical cooling channels of the stator core winding 125 of the motor/generator, the stator core winding 123 of the magnetic bearing motor and the stator core winding 124 of the magnetic bearing disc motor and the hollow shaft 133 of the stator core The interface 138 of the flow channel is connected with a copper pipe, and a cooling flow channel channel 135 of a cavity is connected with the interface of the external radiator.

Step 7. The inner wall of the flywheel assembly 119 is embedded with the permanent magnet outer rotors 120 of the magnetic suspension bearing motors M1 and M2 and the permanent magnet outer rotors 122 of the motor/generator at their corresponding positions, and the corresponding positions are filled with epoxy resin.

Step 8. The inner side of the permanent magnet outer rotor 121 of the magnetic suspension bearing disc motor M3 and the upper support plate 106 of the flywheel are filled with epoxy resin.

Step 9. The hollow shaft 111 of the flywheel assembly is inserted into the auxiliary bearing insert groove 149 and the dynamic seal ring insert groove 151;

Step 10. Under the flywheel, the support disc 107 is axially inserted into the hollow shaft 133 of the stator core with the motor/generator stator core winding 125, the magnetic bearing motor stator core winding 123 and the magnetic bearing disc motor stator core winding The assembly of the hollow shaft 133 of the stator iron core of 124, the collar 145 of the hollow shaft 133 of the stator iron core is tangent to the auxiliary bearing 148, and the other shaft head of the hollow shaft 133 of the stator iron core is inserted into the auxiliary support plate 106 on the flywheel Inside the bearing 148, the flywheel upper support plate 106 and the flywheel body 105 are fastened with sealant and screws.

Step 11. The hollow shaft 111 of the flywheel assembly tangentially intersects the stepped outer circular concave keyway with the inner circular convex teeth of the turbo pump rotor 159, and is locked with a bolt.

Step 12. The assembly of the flywheel assembly 119 and the motor/generator, the magnetic bearing motor, the magnetic bearing disc motor and the turbo pump rotor 159 is constructed above.

Step 13. The casing body 102 of the vacuum casing 101 and the casing bottom 103 are integrally constructed, the spline bushing 147 of the shaft center of the casing bottom 103 and the hollow shaft 133 of the stator core with the above assembly The key shaft 142 is tangent and intersecting, the shaft center spline sleeve 147 of the casing cover 104 is tangent and intersecting with the spline shaft sleeve 147 at the other end of the hollow shaft 133 of the stator iron core, and the casing body 102 is tangent to the casing cover 104 Tighten with sealant and screws to form the magnetic suspension flywheel energy storage motor generator assembly assembly.

Example 2: Please refer to Figures (5-6).

The power controller system of the magnetic levitation flywheel energy storage motor generator assembly has four working modes: energy storage charging mode, energy maintaining operation mode, energy releasing discharge mode and shutdown mode.

The ECU control adopts a 64-bit computer, and receives the voltage, current, pressure, Sensor information of temperature, rotation speed and rotation angle; according to this information, the calculated result is converted into a control signal, and the result of comparison and calculation is used to suspend the magnetic force of the magnetic bearing motor and magnetic bearing disc motor, as well as the required motor/generator. Control of torque, power, pressure and temperature.

The control core components of the magnetic suspension bearing motor M1, M2, M3 magnetic suspension bearing system are the external power supply HVECU or Sc super capacitor module ECU. In the external power supply HV ECU or Sc super capacitor module ECU, the frequency converter controls the magnetic suspension bearing motor M1. , The drive control circuit of the insulated gate bipolar transistor module for the output current conversion of M2 and M3, the microprocessor of the inverter to control the inverter circuit; The speed feedback signals of M2 and M3 angle sensors are compared, and the speed controller outputs a DC current command signal, which is multiplied with the rotor magnetic pole position signals of the magnetic bearing motors M1, M2, and M3 angle sensors to obtain the magnetic bearing motors M1, The current command signal required for the operation of M2 and M3 refers to the actual working current signal of the tracking magnetic bearing motor M1, M2 and M3, and is converted into a switching signal output after calculation by PWM comparator or pulse width modulation; after the signal passes through the isolation circuit, The control poles of the inverter circuit modules VT1-VT6, VT7-VT12 and VT13-VT18 are directly driven to turn on and off quickly, so as to realize the purpose of radial and axial suspension support of the flywheel assembly 119.

The control core component of the motor/generator is the external power supply HV ECU or Sc super capacitor module ECU. In the external power supply HV ECU or Sc super capacitor module ECU, the inverter converts the output current of the motor to the insulated gate bipolar type. The drive control circuit of the transistor module and the microprocessor of the inverter control the inverter circuit; the motor speed command stored by the microcomputer is compared with the speed feedback signal of the motor angle sensor, and the speed controller outputs a DC current command signal. The rotor magnetic pole position signal of the angle sensor is multiplied to obtain the current command signal required for the operation of the motor, and the actual working current signal of the tracking motor is referenced. After calculation by PWM comparator or pulse width modulation, it is converted into a switching signal output; the signal is output through the isolation circuit Afterwards, it directly drives the inverter inverter circuit modules VT40~VT45 to quickly turn on and off the control poles, so as to realize the purpose of inversion, commutation and orientation of the output current of the inverter.

When the external power supply module supplies power, the currents of the stator core windings of the magnetic suspension bearing motors M1, M2, and M3 are controlled by PWM, forcing the auxiliary bearing 148 of the flywheel assembly to suspend radially and axially, and then start the motor drive module, the motor The stator core winding 125 is turned on, the rotor of the flywheel assembly 119 rotates at a high speed, and the flywheel energy storage charging mode; when the rotation speed reaches the preset value, the power supply of the magnetic bearing motors M1, M2, M3 is automatically switched to the super capacitor mode. In the group power supply mode, the startup enters the flywheel energy maintaining operation mode; when the external load requires energy, the flywheel assembly 119 does work to the generator, and the generator permanent magnet in the flywheel assembly 119 cuts the stator iron of the generator. The core winding 125 generates an induced current, which is rectified and stabilized to output electric energy to the DC bus, which supplies power to the load user. At this time, the flywheel assembly 119 is in an energy release and discharge mode; when the speed of the flywheel assembly 119 gradually drops to zero When the power controller and the external load are disconnected, the magnetic suspension bearing motor control switch is disconnected, and the flywheel assembly 119 completely enters the shutdown mode; wherein part of the electric energy generated by the generator passes through the The DC-DC converter steps down alternately to charge the Sc1 and Sc2 supercapacitor modules; the Sc1 and Sc2 supercapacitor modules alternately boost the voltage through the DC-DC converter to provide the flywheel total to the magnetic bearing motors M1, M2, and M3. Second, the charging and discharging of the Sc1 and Sc2 supercapacitor modules are always automatically switched to a state; when the power of the Sc1 supercapacitor module is lower than the preset value, the DC-DC converter automatically switches to the Sc2 supercapacitor. Capacitor module discharge mode, Sc1 supercapacitor module DC-DC converter automatically switches charging mode.

In another embodiment 3: a hybrid bus with flywheel energy storage and supercapacitor energy storage.

It is mainly composed of three parts: the bus hub drive motor module, the super capacitor energy storage module and the flywheel energy storage module. The hub drive motor is 100 kW, the two sets of super capacitor energy storage modules are 16 kWh, and the magnetic levitation flywheel energy storage motor generator set can store 96 kWh of energy. , in which each magnetic levitation flywheel energy storage motor generator is 2kWh long, 180 mm in diameter, 230 mm in diameter, 23 kg in mass, and rotates at 200000 r/min. A total of 48 magnetic suspension flywheel energy storage motor generators have a total weight of 1052 kg, and the total energy storage of the flywheel group is 96kWh, placed on the chassis of the bus vehicle, can enable the 16-ton flywheel energy storage and supercapacitor energy storage hybrid bus to travel 250 km at a speed of 1000km/h, no need to set up charging piles at each bus station, and more It is beneficial to the mobility, popularization and application of hybrid electric buses with flywheel energy storage and supercapacitor energy storage.

Flywheel energy storage and supercapacitor energy storage hybrid bus, the charging pile is fully charged within 30 seconds to charge two sets of supercapacitor energy storage modules of 16kWh, and the total energy storage of the flywheel set is 96kWh in only 15 minutes; , The braking is recovered by the energy of the magnetic levitation flywheel energy storage motor generator. When the bus stop and traffic lights are temporarily stopped, the magnetic levitation flywheel energy storage motor generator charges the super capacitor energy storage module, and the magnetic levitation flywheel can store energy when going uphill and accelerating. The motor generator and the super capacitor energy storage module combine to supply power to the 100 kW drive motor of the bus hub.

Flywheel energy storage and supercapacitor energy storage hybrid bus start mode: turn on the Sc1 supercapacitor module, the Sc1 supercapacitor module booster module supplies power to the DC bus, quickly turn on and off the IGBT wheel hub drive motor 100 kW, Or the magnetic levitation flywheel energy storage motor generator set is transformed into the energy release and discharge mode to supply power to the DC bus, driving the hybrid bus with flywheel energy storage and super capacitor energy storage.

In yet another embodiment 4, the application of magnetic levitation flywheel energy storage motor generator unit array power grid peak regulation and valley filling.

It consists of high-voltage AC power supply network, AC voltage detection module, DC side bus, DC voltage detection module, step-down transformer, diode rectifier, logic control unit, magnetic suspension flywheel energy storage motor generator unit array system, inverter, grid-connected switch, Step-up transformer or low-voltage AC power supply network.

The high-voltage AC power supply network is connected to the DC side busbar through transformers and diode rectifiers to provide energy for the DC busbar.

Further, when the power grid enters the valley power period, the voltage of the high-voltage AC side power grid passes through the step-down transformer through the diode rectifier to the DC side busbar energy, and the magnetic levitation flywheel energy storage motor generator unit array system is respectively connected in parallel with the DC side busbar, forming Maglev flywheel energy storage motor generator unit array charging power supply system.

The magnetic levitation flywheel energy storage motor generator unit array system, DC side bus, inverter, step-up transformer or low-voltage AC power supply network constitute the magnetic levitation flywheel energy storage motor generator unit array system to provide energy for the power grid.

The inverter is connected to the DC side bus, and the output of the inverter is all the way to the low-voltage AC power supply network, or to the high-voltage AC power supply network through a grid-connected switch and a step-up transformer.

Further, when the power grid enters the peak power time period, when the power grid enters the peak power time period, under the control of the total power controller of the magnetic levitation flywheel energy storage motor generator array, each unit of the magnetic levitation flywheel energy storage motor generator goes to the DC side busbar. Discharge, the DC busbar supplies power to the low-voltage AC-side grid through the inverter, or supplies power to the high-voltage AC-side grid through the step-up transformer.

A DC voltage detection module is installed between the DC side busbar and the ECU control. The DC voltage detection module detects the DC side busbar voltage value, and the collected analog voltage signal is converted into a corresponding digital signal U1 and sent to the ECU control.

An AC voltage detection module is set between the high-voltage AC side power grid and the ECU control. The AC voltage detection module collects the power supply voltage value of the high-voltage AC side power grid, and obtains the no-load voltage value of the DC side bus according to the rectification proportional coefficient of the uncontrollable diode rectifier circuit, and then Convert the collected analog voltage signal into a corresponding digital signal U2 and send it to the ECU for control.

The magnetic levitation flywheel energy storage motor generator unit is connected to the DC side busbar through its unit power controller, and the drive unit power controller receives the deviation DC voltage U transmitted by the ECU control, U=U1-U2; the drive unit power controller is based on the size of the U value. and its own SOC value state to make decisions, and issue different control commands to the flywheel energy storage unit array system and the inverter.

Further, the collection DC voltage detection module detects the DC side bus voltage value, converts its analog voltage signal into a corresponding digital signal, and the collection AC voltage detection module collects the voltage value of the high-voltage AC power supply grid, and converts it into an average DC voltage value according to a proportional coefficient. , and then convert its analog voltage signal into a corresponding digital signal; subtract the average DC voltage from the DC side bus voltage, and the difference obtained is defined as the deviation DC voltage U.

The magnetic levitation flywheel energy storage motor generator unit array system provides or absorbs electrical energy according to the peak and valley filling time period of the power grid. There are three working modes: the magnetic suspension flywheel energy storage motor generator unit array system charging mode; the magnetic suspension flywheel energy storage motor The generator unit array system maintains the operation mode; the magnetic suspension flywheel energy storage motor generator unit array system discharges the mode.

Maglev flywheel energy storage motor generator unit array system charging mode: When the grid enters the valley power time period, the high-voltage AC side grid voltage supplies power to the DC side busbar through the step-down transformer through the diode rectifier, and the collected DC voltage data is within the preset value range , if the SOC of the flywheel energy storage unit is <0.5-1, the magnetic suspension flywheel energy storage motor generator unit array is in the charging operation mode.

The magnetic suspension flywheel energy storage motor generator unit array system keeps running mode: when the collected DC voltage data is within the preset value range, if the flywheel energy storage unit SOC=1, the magnetic suspension flywheel energy storage motor generator flywheel energy storage unit enters the keep running mode, the inverter feedback device does not work.

Magnetic levitation flywheel energy storage motor generator unit array system discharge mode: when the grid enters the peak power time period, the collected DC voltage data is within the preset value range, if the flywheel energy storage unit SOC=1 or > 0.5-1, the magnetic levitation flywheel The energy storage motor generator unit array is in the charging operation mode; under the control of the total power controller of the flywheel energy storage array, each unit of the magnetic suspension flywheel energy storage motor generator discharges to the DC side bus, and the DC side bus passes through the inverter to the low-voltage AC side. Grid power supply, or supply power to the high-voltage AC side grid through a step-up transformer.

The working principle of the magnetic levitation flywheel energy storage motor generator is shown in Figure 1-6.

The magnetic levitation flywheel energy storage motor generator is divided into three working states: energy storage charging, energy maintaining operation and energy discharging discharge. The energy storage of the magnetic levitation flywheel energy storage motor generator is realized by the inertia of the flywheel. If the flywheel runs in an ideal state without any resistance loss, all the energy will be saved and released. The energy storage capacity of the magnetic levitation flywheel energy storage motor generator depends on the rotational inertia and rotational speed of the flywheel, and increasing the rotational speed can greatly improve the energy storage capacity of the magnetic suspension flywheel energy storage motor generator.

The principle of the magnetic suspension flywheel energy storage motor generator, the working process of the magnetic suspension flywheel energy storage motor generator is: under the action of the power controller system, the integrated motor in the magnetic suspension flywheel energy storage motor generator is driven by the external power supply, It operates in the form of a motor, the motor drives the flywheel to rotate at a high speed, and the flywheel completes the process of storing kinetic energy, that is, the flywheel battery is "charged" with electricity, and then the flywheel is in a state of energy retention with a low loss, until when the vehicle load needs energy, the flywheel drives The integrated motor rotates, the integrated motor rotates in the form of a generator, converts kinetic energy into electrical energy, outputs electrical energy to the outside, completes the conversion of mechanical energy or kinetic energy to electrical energy, and converts electrical energy into the voltage required by various loads of the car through the power controller system to drive the load. When the power controller system generates electricity, the speed of the flywheel gradually decreases. The flywheel of the power controller system runs in a vacuum environment with a very high speed, of which the speed can reach 200,000 r/min. The bearings used are non-contact magnetic bearings. .

For those skilled in the art, other advantages and modifications can be easily imagined from the above implementation types. Therefore, the present invention is not limited to the above-mentioned specific examples, which are merely used as examples to describe one form of the present invention in detail and exemplarily. Within the scope of not departing from the spirit of the present invention, the technical solutions obtained by those of ordinary skill in the art through various equivalent replacements according to the above-mentioned specific examples shall all be included within the scope of the claims of the present invention and their equivalents.

Claims (10)

1. A magnetic suspension flywheel energy storage motor generator comprises a vacuum casing, a flywheel assembly, a magnetic suspension bearing system, a motor/generator, a hollow shaft of a stator core, a movable sealing ring, an auxiliary bearing, a cooling system and a self-vacuumizing device, wherein a vacuum cavity is formed by the vacuum casing, the flywheel assembly, the magnetic suspension bearing system, the motor/generator, the hollow shaft of the stator core, the movable sealing ring, the auxiliary; the flywheel assembly integrates a plurality of magnetic suspension bearing motors and a permanent magnet outer rotor of a motor/generator; stator core windings of the plurality of magnetic suspension bearing motors are electrified to generate radial and axial suspension supports of the flywheel assembly, the stator core windings of the motor are electrified to drive the flywheel assembly to rotate, and the flywheel assembly is in an energy storage mode; when the rotating speed of the flywheel assembly reaches a preset value, the motor is converted into the generator mode, the flywheel assembly is in the energy release discharge mode, the flywheel assembly is used for applying work to the generator by utilizing the inertia potential energy of the flywheel assembly, the generator permanent magnet outer rotor of the flywheel assembly cuts a generator stator core winding to generate induction current, and the induction current is rectified and stabilized to supply power to a load user; electrical energy storage, conversion and recombination are performed by a power controller system.

2. A magnetic suspension flywheel energy storage motor generator as claimed in claim 1, wherein the vacuum casing is a round can structure, comprising a casing body, a casing bottom and a casing cover, the casing body and the casing bottom are integrated; the axes of the machine shell bottom and the machine shell cover are provided with a hollow shaft sleeve of the stator core, a spline shaft sleeve, a movable sealing ring caulking groove, a built-in pump body and a hollow rotating shaft sleeve of the flywheel assembly, and a concave ring groove cooling flow channel is arranged in the inner circle of the hollow rotating shaft sleeve; the spiral cooling flow channel and the vortex cooling flow channel are arranged in the machine shell body, the machine shell bottom and the machine shell cover and are communicated with each other, the vortex cooling flow channel is communicated with the machine shell bottom and the machine shell cover and an inner circular concave ring groove cooling flow channel opening of the hollow rotating shaft sleeve of the flywheel assembly, and cooling liquid flows from one end of the inner circular concave ring groove cooling flow channel of the hollow rotating shaft sleeve of the flywheel assembly to the inner circular concave ring groove cooling flow channel of the hollow rotating shaft sleeve of the flywheel assembly at the other end and flows out; the vacuum machine shell is characterized in that the machine shell body is fixedly connected with the machine shell cover through screws and sealing glue, and the outer layer of the material of the vacuum machine shell, namely the aluminum-titanium alloy, is wrapped with a carbon fiber resin composite material.

3. A magnetic suspension flywheel energy storage motor generator as claimed in claim 1, wherein the flywheel assembly is cylindrical and has umbrella-shaped supporting upper and lower discs, including the outer permanent magnet rotor, the flywheel body and the upper and lower flywheel supporting discs of the magnetic suspension bearing motor and the motor/generator; the upper and lower supporting disks are provided with a hollow rotating shaft, an auxiliary bearing embedded groove, a movable sealing ring embedded groove and a flow guide compressed air round hole of the flywheel assembly; the flywheel body and the upper and lower supporting disks are internally provided with a spiral cooling flow channel and a vortex-shaped cooling flow channel which are communicated with each other, the vortex-shaped cooling flow channel is communicated with a through hole of a cooling flow channel of the excircle and the inner circle concave ring groove of the hollow rotating shaft of the flywheel assembly, and cooling liquid flows into the outer circle concave ring groove of the hollow rotating shaft at one end of the outer circle concave ring groove of the hollow rotating shaft and flows out of the outer circle concave ring groove of the hollow; the flywheel assembly is made of a permanent magnet and a multi-layer carbon fiber resin wrapping composite material.

4. A magnetic suspension flywheel energy storage motor generator according to claim 1, characterized in that the stator core built-in spiral cooling flow channel of the motor/generator is communicated with the cooling flow channel of the hollow shaft-cavity of the stator core, and the cooling liquid flows from one end of the hollow shaft-cavity cooling flow channel of the stator core to the other end; the motor/generator is a switched reluctance motor, a stepping reluctance motor, an iron core permanent magnet motor and a coreless permanent magnet motor, and the rotor of the motor/generator is of an inner rotor structure and an outer rotor structure.

5. A magnetic suspension flywheel energy storage motor generator as claimed in claim 1, 3 or 4, characterized in that the magnetic suspension bearing system comprises magnetic suspension bearing motors M1, M2, M3, a flywheel assembly, a hollow rotating shaft of the flywheel assembly and an auxiliary bearing; stator core windings of the magnetic suspension bearing motors M1 and M2 are electrified to force the auxiliary bearing of the hollow rotating shaft of the flywheel assembly to radially suspend, stator core windings of the magnetic suspension bearing motors M3 are electrified to force the auxiliary bearing of the hollow rotating shaft of the flywheel assembly to axially suspend, and the flywheel assembly is in a radial and axial rotation suspension supporting state; the magnetic suspension bearing motors M1 and M2 are rotating motors, the magnetic suspension bearing motor M3 is a disc motor, the magnetic suspension bearing motors M1 and M2 are arranged on the two sides of the symmetry of the motor/generator, the magnetic suspension bearing disc motor M3 is a disc motor and is arranged on the inner side of a flywheel upper supporting disc, a rotor support on the inner side of the flywheel upper supporting disc is provided with a magnetic suspension bearing disc motor M3 permanent magnet, and the auxiliary bearing is a ceramic bearing.

6. A magnetic levitation flywheel energy storage motor generator as claimed in claim 1, 2, 3, 4 or 5, it is characterized in that the excircle of the hollow shaft of the stator core is in a step-shaped three-cavity structure with a Y-shaped inner circle, the excircle of the hollow shaft of the stator core comprises a shaft head, a shaft neck, a shaft collar, a shaft body and a stator core bracket, the shaft head is tubular, the end part of the shaft neck is a spline shaft, the shaft neck is provided with an excircle concave ring groove cooling flow channel shunting through hole and an auxiliary bearing, the inner ring of the auxiliary bearing is tangent with the shaft collar, the shaft body is provided with a plurality of cooling flow passage interfaces which are communicated with a plurality of stator core spiral cooling flow passages, the hollow shaft support of the stator core is provided with a concave key groove, the key groove is intersected and tangent with convex teeth of a plurality of inner circles of the stator core, and the spline shaft is intersected and tangent with the spline shaft sleeve of the machine shell bottom and the machine shell cover; the inner circle of the hollow shaft of the stator core comprises a cavity cooling runner channel, a cavity cable channel and a three-cavity vacuum suction channel, and the cavity cooling runner pipe is provided with a journal excircle concave ring groove cooling runner through hole which is tangent to an interactive interface of the hollow rotating shaft inner circle concave ring groove cooling runner through hole of the flywheel assembly; the two-cavity cable channel is characterized in that a through hole is formed in the two-cavity shaft body, and a stator core winding cable lead penetrates through the through hole and is connected with a power controller; the three-cavity vacuum suction channel is provided with a plurality of vacuum suction through holes, and the hollow shaft of the stator core is made of a non-magnetic metal and carbon fiber resin composite material.

7. A magnetic suspension flywheel energy storage motor generator according to claim 1, 2, 3, 4, 5 or 6, characterized in that the cooling system comprises an integrated structure of a vacuum casing cooling flow channel, a flywheel assembly cooling flow channel, a stator core cooling flow channel, a hollow shaft cooling flow channel of a stator core and an auxiliary bearing cooling flow channel; the cooling flow channel flows in from one end of a first cavity of a hollow shaft head of the stator core, is distributed to an inner circle concave ring groove cooling flow channel through hole of a shaft neck outer circle concave ring groove cooling flow channel of the hollow shaft of the stator core, is distributed to an inner concave ring groove cooling flow channel of a hollow rotating shaft sleeve of the flywheel assembly of the chassis bottom and the chassis cover, and is converged to a cooling flow channel outlet at the other end of the first cavity of the hollow shaft head of the stator core, and a cooling flow channel inlet and a cooling flow channel outlet of the first cavity of the hollow shaft of the stator core are connected with an external radiator and a circulating pump for circulating cooling; wherein the axle journal excircle spill annular cooling runner through-hole of stator core's hollow shaft with the interior round spill annular cooling runner through-hole of the hollow rotating shaft of flywheel assembly is crossing tangent, the excircle spill annular cooling runner through-hole of the hollow rotating shaft of flywheel assembly with the hollow rotating shaft cover of the flywheel assembly of the chassis bottom and chassis lid is crossing tangent to have the annular cooling runner.

8. A magnetic suspension flywheel energy storage motor generator as claimed in claim 1, 2, 3 or 4, characterized in that the self-vacuum pumping device comprises an internal pump body, a pump rotor, turbine blades, a self-vacuum pumping outlet, a one-way valve and a vacuum pressure gauge; the built-in pump body is embedded at the inner sides of the machine shell bottom and the machine shell cover, a plurality of self-vacuumizing exhaust holes are arranged at the inner sides of the machine shell bottom and the machine shell cover and are communicated with external vacuum exhaust outlets of the machine shell bottom and the machine shell cover through a plurality of guide pipes arranged in the machine shell bottom and the machine shell cover, and the vacuum exhaust outlets are provided with one-way valves and vacuum pressure gauges; the hollow rotating shaft step excircle concave-key groove of the flywheel assembly is tangentially intersected with the inner circle convex tooth of the pump rotor and locked by a bolt; the pump rotor and the hollow rotating shaft of the flywheel assembly rotate synchronously; the pump rotor and the turbine blade are made of carbon fiber resin composite materials.

9. A magnetic suspension flywheel energy storage motor generator as claimed in claim 1, 2, 3, 4 or 5, characterized by that, the power controller system comprises an external power supply module, a super capacitor module, a DC-DC/AC step-up and step-down converter, an automatic switching module, a magnetic suspension bearing motor control module and a motor/generator driving module and a rectifying and voltage stabilizing module; when an external power supply module supplies power, the currents of stator core windings of magnetic suspension bearing motors M1, M2 and M3 are controlled through PWM to force a flywheel assembly auxiliary bearing to be suspended in the radial direction and the axial direction, then a motor driving module is started, the stator core windings of the motor are conducted, a rotor of the flywheel assembly rotates at a high speed, and at the moment, the flywheel assembly is in an energy storage charging mode; when the rotating speed reaches a preset value, the power supply of the magnetic bearing motors M1, M2 and M3 is automatically switched to a super capacitor module power supply mode, and the starting enters a flywheel assembly energy maintaining operation mode; when an external load needs energy, the flywheel assembly does work on the generator, a permanent magnet of the generator in the flywheel assembly cuts a stator core winding of the generator to generate induced current, the induced current is rectified and stabilized to output electric energy to a direct current bus, the direct current bus supplies power to a load user, and at the moment, the flywheel assembly is in an energy release and discharge mode; when the rotating speed of the flywheel assembly is gradually reduced to zero, a switch connected with the power controller and an external load is disconnected, a magnetic suspension bearing motor control switch is disconnected, and the flywheel assembly completely enters a shutdown mode; wherein part of the electric energy generated by the generator is subjected to voltage reduction through the DC-DC converter to alternately charge the Sc1 and the Sc2 super capacitor module; the Sc1 and Sc2 super capacitor module alternately provides the suspension electric energy of the flywheel assembly to the magnetic suspension bearing motors M1, M2 and M3 through the voltage boosting of the DC-DC converter; secondly, the charging and discharging of the Sc1 and Sc2 super capacitor modules are always automatically switched to a state; when the electric quantity of the Sc1 super capacitor module is lower than a preset value, the DC-DC converter is automatically switched to a Sc2 super capacitor module discharging mode, and the Sc1 super capacitor module DC-DC converter is automatically switched to a charging mode.

10. A magnetic levitation flywheel energy storage motor generator as claimed in claim 1, 2, 3, 4, 5, 6, 7, 8 or 9 wherein the vehicles and electrical power generators and assemblies involved in new energy electric drive.

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