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WO2009026767A1 - Générateur synchrone à excitation hybride doté de systèmes intérieur et extérieur de régulation de tension et son procédé de régulation de tension - Google Patents

Générateur synchrone à excitation hybride doté de systèmes intérieur et extérieur de régulation de tension et son procédé de régulation de tension Download PDF

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Publication number
WO2009026767A1
WO2009026767A1 PCT/CN2007/070604 CN2007070604W WO2009026767A1 WO 2009026767 A1 WO2009026767 A1 WO 2009026767A1 CN 2007070604 W CN2007070604 W CN 2007070604W WO 2009026767 A1 WO2009026767 A1 WO 2009026767A1
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WO
WIPO (PCT)
Prior art keywords
permanent magnet
generator
stator
voltage
rotor core
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2007/070604
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English (en)
Chinese (zh)
Inventor
Leiting Zhang
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to PCT/CN2007/070604 priority Critical patent/WO2009026767A1/fr
Publication of WO2009026767A1 publication Critical patent/WO2009026767A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/02—Details
    • H02K21/04—Windings on magnets for additional excitation ; Windings and magnets for additional excitation
    • H02K21/042—Windings on magnets for additional excitation ; Windings and magnets for additional excitation with permanent magnets and field winding both rotating
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets
    • H02K1/2781—Magnets shaped to vary the mechanical air gap between the magnets and the stator
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/276—Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM]

Definitions

  • the present invention relates to a generator, and more particularly to a synchronous motor in which an electromagnetic field and a permanent magnetic field are superimposed and excited. Background technique
  • the working principle of the generator is the application of Faraday's law of electromagnetic induction, that is, the magnitude of the induced electromotive force in the circuit is proportional to the rate of change of the magnetic flux passing through the circuit.
  • the motor is an electromagnetic device that converts mechanical energy and electrical energy into each other by using an electromagnetic field as a medium to establish an air gap magnetic field necessary for electromechanical energy conversion in the motor.
  • One is to generate a magnetic field by passing a current through the windings of the motor.
  • the other is to generate a magnetic field from a permanent magnet.
  • the excitation winding is generated by the excitation winding and the auxiliary excitation winding, which consumes energy during the excitation process, reduces the efficiency of the generator, and increases the temperature rise of the generator when it becomes thermal energy, and Electronic components such as brushes and slip rings reduce the reliability of the generator, shorten the life, and cause electromagnetic interference.
  • the rare earth permanent magnet generator has many advantages such as simple structure, reliable operation, small volume, light weight, low loss, high efficiency, and flexible and diversified shape and size of the generator. With the continuous improvement and improvement of the performance of permanent magnet materials, especially the improvement of thermal stability and corrosion resistance of NdFeB permanent magnet materials and the gradual reduction of price and the further development of power electronic devices, the application range of permanent magnet motors is further improved. widely.
  • the permanent magnet synchronous generator does not require the excitation winding and the DC excitation power supply, and eliminates the troublesome collector ring and brush device, and becomes a brushless generator. Therefore, the structure is simple and the operation is more reliable.
  • the use of rare earth permanent magnets can also increase the air gap magnetic density and increase the generator speed to an optimum value. These can reduce the size of the generator, reduce the quality, and improve the power to mass ratio.
  • permanent magnet synchronous generators do not require reactive excitation current, which can significantly improve the power factor, reduce the stator current and stator resistance loss, and have no rotor resistance loss during stable operation, thus making the efficiency ratio the same.
  • the specification induction motor is high.
  • permanent magnet synchronous generators maintain high efficiency and power factor in the range of 25% to 120% of rated load, enabling energy saving during light load operation. More significant.
  • the magnetic field cannot be adjusted, which is a disadvantage that the permanent magnet generator is difficult to overcome.
  • the magnetic field cannot be adjusted, making it difficult to control the generator output voltage, especially for high-power generators.
  • the load of the generator changes, such as sudden rise, sudden release or speed, its output voltage also changes. This change usually exceeds the range of voltage allowed by the user. The maximum voltage deviation can reach 25%, making the demand High quality power supplies are not available.
  • the present invention is directed to the above-mentioned shortcomings in the prior art, and the technical problem to be solved is to provide a hybrid excitation synchronous generator with an internal and external voltage regulating system capable of adjusting the output voltage of the generator, which can keep the output voltage of the generator stable. Strong excitation, high efficiency and good energy saving effect.
  • a still further object of the present invention is to provide a voltage regulation method for a synchronous generator.
  • the hybrid excitation synchronous generator with an internal and external pressure regulating system comprises a rotor assembly, a stator, an external pressure regulating system and a fan blade, wherein the rotor assembly comprises a rotating shaft and a permanent magnet, and the stator comprises a stator core, a stator winding and a stator a bracket having a slot formed on an inner surface of the stator core, the stator winding being embedded in the slot, the rotor assembly further comprising a rotor core, a coil winding and/or a conductor strip and a rectifying component; the rotor core is not
  • the regular cylindrical shape is fixed on the rotating shaft, and is composed of a pole body and a pole piece located at both ends of the pole body, forming a slot between the two pole pieces; the coil winding and/or the conductor strip are parallel to the rotor core
  • the direction of the intersecting axis is set on the pole body of the rotor core, and is connected in series with the rectifying component to form
  • the intersection axis is symmetrically disposed on the surface of the pole piece of the rotor core, and is paired to form a magnetic field pole group; the magnetic field pole group is located in the rotor iron
  • the permanent magnet unit on one side of the core of the core is disposed with the N pole facing the air gap, and the permanent magnet unit located on the other side of the intersection of the rotor core is disposed with the S pole facing the air gap;
  • the direction of the permanent magnetic field generated by the magnet is the same as the direction of the electromagnetic field generated by the closed loop;
  • the stator winding includes the working coil winding and the control power coil winding;
  • the working coil winding is a single coil winding, and the output end is provided with a plurality of taps, corresponding Outputting different voltages; controlling the power coil windings to supply power to the external voltage regulating system;
  • the external voltage regulating system measures the voltage value on the output line of the working coil winding in real time, and calculates the error between the measured voltage value and the
  • the external voltage regulation system includes a control power rectifier circuit, a generator tap selection relay circuit, a relay power drive circuit, a sampling circuit, an A/D conversion circuit, a microprocessor and a button Display circuit, where:
  • Controlling the power rectifier circuit the input end of which is connected to the output end of the control power coil winding, and is used for converting the alternating current outputted by the control coil winding into direct current to supply power to the external voltage regulating system;
  • the generator tap selects a relay circuit for selecting two taps connected to the winding of the working coil to output the output voltage of the generator;
  • a relay power driving circuit the output end of which is connected to the generator tap selection relay circuit for driving the generator tap selection relay circuit;
  • a sampling circuit the input end of which is connected to an output end of the generator tap selection relay circuit for collecting a voltage effective value, a current effective value and a frequency on the output line of the working coil winding;
  • An A/D conversion circuit having an input terminal connected to an output end of the sampling circuit
  • a microprocessor respectively connected to an input end of the relay power driving circuit, an output end of the A/D conversion circuit, and a button display circuit; the microprocessor is configured to set a rated voltage value and an error reference amount, and receive sampling The effective value of the voltage on the output line of the working coil winding measured by the circuit, the current effective value and the frequency, and the error amount between the measured voltage effective value and the rated voltage value is calculated, according to the error amount and the set error reference amount The deviation between the generator tap selection relay circuit is selected to be connected to a different tap on the working coil winding by controlling the relay power drive circuit.
  • the above-described hybrid excitation synchronous generator with an internal and external pressure regulating system wherein the permanent magnet unit has a cross-sectional shape of one of a tile shape, a sector shape, a rectangular shape or a trapezoidal shape.
  • the above-mentioned hybrid excitation synchronous generator with internal and external pressure regulating system wherein the permanent magnet monomer is a rare earth permanent magnet monomer, and the rare earth permanent magnet monomer is made of neodymium iron boron, and is provided on the surface of the rare earth permanent magnet monomer. Electroplated protective layer or resin protective layer.
  • the above-mentioned hybrid excitation synchronous generator with internal and external pressure regulating system wherein the pole piece edge at the upper left corner and the lower right corner of the rotor core, or the pole piece edge at the upper right corner and the lower left corner is provided with a pole piece notch, which is configured to be straight Axis-centered left and right asymmetrical magnetic circuits.
  • the above-mentioned hybrid excitation synchronous generator with internal and external pressure regulating system wherein the rotor core is formed by stacking a plurality of silicon steel punching sheets, and vent holes are symmetrically arranged on the rotor core centering on the rotating shaft.
  • the above-mentioned hybrid excitation synchronous generator with internal and external pressure regulating system wherein the groove on the inner surface of the stator core is a chute; a w-shaped ventilation groove is further formed on the outer outer edge of the stator core;
  • the working coil windings use sinusoidal windings.
  • the invention also provides a hybrid excitation synchronous generator with an internal and external pressure regulating system, comprising a rotor assembly, a stator, an external pressure regulating system and a fan blade, wherein the rotor assembly comprises a rotating shaft and a permanent magnet, and the stator comprises a stator core and a stator a winding and a stator bracket, wherein a groove is formed on an inner surface of the stator core, and a stator winding is embedded in the slot, the rotor assembly further includes a rotor core, and the rotor core is in an irregular cylindrical shape, and is fixed On the rotating shaft, an even number of convex magnetic poles larger than 2 are arranged along the circumferential direction of the rotor core; the convex magnetic poles are arranged at equal intervals in the circumferential direction, and each convex magnetic pole is composed of a pole body and a pole piece located at the top of the pole body.
  • Winding coil windings and/or conductor strips are disposed on the poles of the convex magnetic poles, and the coil windings and/or the conductor strips are connected in series with the rectifying component to form a closed loop to form an internal voltage regulating system;
  • the permanent magnets of the rotor assembly include a plurality of permanent magnets Monomer, the plurality of permanent magnet monomers are respectively fixed on the surface of the pole piece of each convex magnetic pole, the number of permanent magnet monomers on each convex magnetic pole is equal, and the polarities of the permanent magnet monomers on the same convex magnetic pole are the same
  • the polarities of the permanent magnet cells on the adjacent two convex magnetic poles are oppositely arranged; and, on each convex magnetic pole, the direction of the permanent magnetic field generated by the permanent magnet single body is the same as the direction of the electromagnetic field generated by the closed loop described above;
  • the working coil winding and the control power coil winding are included; the working coil winding is a single coil winding, and
  • the invention also provides a voltage regulation method for a synchronous generator, the synchronous generator comprising a stator and a rotor assembly, the stator comprises a stator core and a stator winding, the rotor assembly comprises a rotating shaft and a permanent magnet, and a rotor is arranged on the rotating shaft of the rotor
  • the iron core is provided with a closed loop formed by the coil winding and/or the conductor strip and the rectifying component on the rotor core.
  • the electromagnetic field generated by the closed loop is the same as the permanent magnetic field generated by the permanent magnet, and the hybrid superposition , co-excitation, to achieve the output voltage of the generator is adjusted internally; an external voltage regulation system is also provided on the synchronous generator, the external voltage regulation system measures the voltage value on the output line of the stator winding in real time, and calculates the measured voltage value and The amount of error between the rated voltage values, based on the deviation between the error amount and the set error reference amount, is automatically selected to be connected to different taps on the stator winding corresponding to different output voltages, and the output voltage of the generator is externally adjusted. .
  • the closed loop formed by the coil winding and/or the conductor strip and the rectifying component of the present invention functions as an internal voltage regulating system.
  • the internal pressure regulating system has a complex Excitation function
  • the generated magnetic field can increase the load voltage of the generator, reduce the output voltage fluctuation caused by the load change, and increase the voltage regulation rate.
  • the external voltage regulation system further performs voltage regulation through the power electronic circuit on the basis of the internal voltage regulation system, and the external voltage regulation system can change different contacts on the working coil winding of the generator stator according to the output voltage value, and access Different stators work armature coil lengths to achieve precise adjustment of the generator output voltage.
  • the external voltage regulating system of the generator of the present invention is separately separated from the driving system of the prime mover.
  • the internal and external pressure regulating systems can work together to more accurately adjust the output voltage of the generator.
  • the generator maintains the output rated voltage.
  • the permanent magnet of the hybrid excitation synchronous generator with internal and external pressure regulating system is made of NdFeB material, which maintains the characteristics of strong excitation, good voltage waveform and high efficiency of rare earth permanent magnet generator, and is small in size and weight. Light and maintenance free.
  • the rare earth permanent magnet material has a strong magnetic field, the generator is small in size, light in weight, and there are many electronic components on the rotor, so that maintenance-free can be realized.
  • the generator excitation system of the invention is mainly composed of permanent magnets, and the rotor coil and/or the conductor strip are only used as the excitation voltage regulating coil, brushless, and no slip ring. Compared with the traditional generator, the structure is simple, the operation is reliable, and the operation is convenient. No radio frequency interference.
  • the hybrid excitation synchronous generator with internal and external pressure regulating system of the invention has strong anti-overload capability and can operate in a harsh environment.
  • the permanent magnet does not increase the temperature during operation, so the generator has a small temperature rise and a long life. Sudden and sudden load-carrying capacity is strong, and the transient response is good.
  • the load capacity of non-linear load products such as air conditioners, electric motors, switching power supplies, and UPS uninterruptible power supplies is much larger than that of conventional generators, and can start motors of comparable power.
  • the hybrid excitation synchronous generator with internal and external pressure regulating system of the invention has high efficiency, remarkable energy saving effect, high power density and high power factor. Since the present invention mainly uses a permanent magnet to generate a magnetic field, excitation does not require energy consumption. Through experiments, the generator of the present invention saves fuel by 25% compared with the conventional electromagnetic induction generator. Each generation of electricity saves about 50 grams of fuel compared with the conventional generator, and increases the power generation by 15% compared with the conventional generator.
  • the hybrid excitation synchronous generator with internal and external pressure regulating system has low noise, small electromagnetic interference and good electromagnetic compatibility.
  • the generator of the present invention is mainly a magnetic field generated by a rare earth permanent magnet, so electromagnetic noise is small, and interference to radio communication and electronic equipment is small.
  • the hybrid excitation synchronous generator with internal and external pressure regulating system of the invention has low cost and is convenient for mass production. Since the present invention employs a hybrid excitation method, the rare earth permanent magnets on the rotor are reduced, which saves expensive rare earth materials, and the waste in the stator punch is used for the rotor punching, which also saves raw materials and facilitates mass production. Production, reducing costs.
  • the stator of the hybrid excitation synchronous generator with internal and external pressure regulating system adopts a chute stacking structure, which can effectively suppress the interference of the tooth harmonics on the generator voltage waveform, and reduce the magnetic pull force generated when the generator is running at no load.
  • the resistance has solved the technical problem of large magnetic resistance of rare earth permanent magnet generators.
  • the stator core of the hybrid excitation synchronous generator with internal and external pressure regulating system also has a W-shaped ventilation groove on the outer edge of the stator core, which enhances the heat dissipation effect and improves the working efficiency of the generator.
  • the rare earth permanent magnet of the hybrid excitation synchronous generator with internal and external pressure regulating system of the invention adopts a protective layer such as electroplating to prevent corrosion and reduce heat radiation, prolong the life of the rare earth permanent magnet, and has a cooling effect.
  • the hybrid excitation synchronous generator with internal and external pressure regulating system has ventilating holes symmetrically on the rotor core with the rotating shaft as the center, so that the axial airflow of the rotor is increased, and the temperature rise of the rotor is low, and the reinforcement is enhanced.
  • the overload capacity of the generator is provided.
  • the bottom width of the slot of the rotor core is larger than the width of the slot of the slot, which serves to improve the performance of the motor.
  • the hybrid excitation synchronous generator with internal and external pressure regulating system of the invention has simple structure and light weight.
  • FIG. 1 is a schematic view showing the assembly of a hybrid excitation synchronous generator with an internal and external pressure regulating system according to the present invention
  • FIG. 2A is a perspective view of the rotor assembly of the present invention
  • Figure 2B is a schematic cross-sectional view taken along line A-A of Figure 2A;
  • FIG. 2C is a top view of the permanent magnet unit of FIG. 2A;
  • Figure 2D is a cross-sectional view taken along line B-B of Figure 2C;
  • FIG. 2E shows a cross-sectional shape of another rotor core of the present invention
  • FIG. 3A is a schematic structural view of still another embodiment of a rotor assembly of the present invention.
  • Figure 3B is a plan view of the permanent magnet unit of Figure 3A;
  • Figure 3C is a cross-sectional view taken along line C-C of Figure 3B;
  • FIG. 4A is a schematic structural view of still another embodiment of a rotor assembly of the present invention.
  • Figure 4B is a plan view of the permanent magnet unit of Figure 4A;
  • Figure 4C is a cross-sectional view taken along line D-D of Figure 4B;
  • FIG. 5A is a schematic structural view of a stator core of the present invention.
  • Figure 5B is a schematic view taken along line A of Figure 5A;
  • Figure 6 is a schematic block diagram of the external pressure regulating system of the present invention.
  • Figure 7 is a schematic view showing the principle of the internal pressure regulating system of the present invention.
  • Figure 8 is a circuit diagram of a generator tap selection relay circuit and a relay power drive circuit of the present invention.
  • Figure 9 is a circuit diagram of a sampling circuit and an A/D conversion circuit of the present invention.
  • FIG. 10 is a circuit diagram of a control power rectifier circuit of the present invention.
  • Figure 1 is a circuit diagram of a key display circuit of the present invention
  • Figure 12 is a flow chart showing the analysis of the error between the measured voltage rms value and the rated voltage value by the microprocessor of the present invention
  • Figure 13 is a schematic view showing the structure of a rotor assembly of another embodiment of the hybrid excitation synchronous generator with an internal and external pressure regulating system of the present invention.
  • FIG. 1 is a schematic view showing the assembly of a hybrid excitation synchronous generator with an internal and external pressure regulating system according to the present invention. As shown in the figure, it is mainly composed of a fixed portion, a rotating portion, an external pressure regulating system, and a junction box 7.
  • the fixed portion is mainly composed of a stator core 21, an end cover 22, a stator winding, a stator bracket 26, a windshield 9, and the like.
  • the rotating portion is mainly composed of a permanent magnet 10, a rotating shaft 13, a coil winding 16, a rotor core 18, a bearing 3, a fan blade 8, and the like. Wherein, a groove is provided on the inner surface of the stator core 21, and the stator winding is embedded in the groove.
  • the stator windings include a working coil winding 23 and a control power coil winding 24.
  • the working coil winding 23 employs a single coil winding, and its output terminal is provided with a plurality of taps for outputting the output voltage of the generator.
  • the working coil winding can adopt a sinusoidal winding structure, so that the generator output voltage waveform is a sine wave.
  • the power coil winding 24 is controlled to supply power to the external voltage regulation system.
  • the stator core 21 is a part of the magnetic field of the generator. In order to improve the performance and reduce the iron loss, the silicon steel sheet is twisted together by using a argon arc enthalpy after stacking a silicon steel sheet having a thickness of 0.5 mm or 0.35 mm. .
  • the stator bracket 26 supports the stator core 21 and the end cover 22 of the generator to form a closed type, and the stator winding is protected by the outer casing to prevent corrosion and pollution.
  • the end cap 22 is used to support the rotor of the generator. In order to ensure good electrical performance, the air gap between the stator and the rotor is small, generally in the range of 0. l ⁇ 0. 3mm, so the mating surfaces of the end caps are required to be concentric. .
  • the windshield 9 protects the blades 8 for ventilation, safety, and temperature rise.
  • the rotor core 18 is a part of the magnetic circuit of the whole generator, and the material of the rotor core may be 0.5 mm or 0.35 mm thick silicon steel sheet with high silicon content.
  • the permanent magnet 10 of the present invention is sintered by rare earth neodymium iron boron NdFeB because it has the advantages of large magnetic energy product, and is characterized by magnetic properties, reliability, shape, anisotropy (alignment), magnetization, and the like. It has superior performance and features a magnetic energy product of more than 10 times that of a ferrite magnet.
  • the shaft 13 of the generator is coaxial with the vane 8 Installation, the rotor blades rotate coaxially with the rotor to produce an axial wind direction.
  • FIG. 2A is a perspective view of the rotor assembly of the present invention
  • FIG. 2B is a cross-sectional view taken along line AA of FIG. 2A
  • FIG. 2C is a plan view of the permanent magnet unit of FIG. 2A
  • FIG. 2D is a cross-sectional view taken along line BB of FIG. 2C.
  • the rotor assembly of the present invention includes a permanent magnet 10, a rotating shaft 13, a coil winding 16, a rotor core 18, and a rectifying assembly.
  • the rectifier assembly employs a diode 17.
  • the rotor core 18 is formed by stacking a plurality of silicon steel sheets having a hole in the middle thereof, and has an irregular cylindrical shape and is press-fitted on the rotating shaft 13.
  • the holes in the silicon steel punch are symmetrically arranged around the rotating shaft 13, and constitute the vent holes 12 of the rotor core.
  • the venting opening 12 increases the axial airflow of the rotor, ensuring a lower temperature rise of the rotor and enhancing the overload capability of the generator.
  • the rotor core 18 is divided into a pole body 181 and two pole pieces 183 and 184 at both ends of the pole body, and slots 185 and 186 are formed between the two pole pieces 183, 184.
  • the coil winding 16 is wound around the pole body 181 in a direction parallel to the axis of intersection q of the rotor core, and is connected in series with the diode 17 to form a closed loop in which a resin lacquer package is injected.
  • the bottom width W2 of the slot is greater than the mouth width W1 of the slot, and the test proves that this structure is advantageous for improving the performance of the motor.
  • the permanent magnet 10 is composed of an even number of permanent magnet cells 1 1 which are symmetrically disposed on the surface of the pole pieces 183 and 184 of the rotor core centering on the axis of intersection q of the rotor core 18, and are magnetized to form a pair.
  • the magnetic field pole group; the permanent magnet element of the magnetic field pole group located on the side of the intersection axis q of the rotor core is disposed with the N pole facing the air gap, and the permanent magnet monomer located on the other side of the intersection axis q of the rotor core is S
  • the pole is disposed in an air gap manner; the direction of the permanent magnetic field generated by the permanent magnet 10 is the same as the direction of the electromagnetic field generated by the closed loop formed by the coil winding 16 and the diode 17. Only the example using four permanent magnet monomers is shown in Figs. 2A and 2B, and as described above, two blocks, six permanent magnet monomers, and the like can also be employed.
  • the shape of the permanent magnet single body is not limited to the tile shape shown in the drawing, and may be a fan shape or the like.
  • the pole piece edges of the upper and lower right corner rotor cores of the rotor core are respectively provided with pole piece notches 14 and 15, respectively, which constitute a left and right asymmetrical magnetic circuit centered on the straight axis d.
  • a pole piece notch can be provided at the edge of the pole piece in the upper right corner and the lower left corner of the rotor core.
  • the assembly method of the permanent magnet unit 11 and the rotor core 18 is an external type, specifically, a screw hole 19 is formed in the permanent magnet unit 11 and the rotor core 18, and a hexagonal screw 191 and a viscous screw are used.
  • the mixture of the permanent magnets 11 is externally fixed to the rotor core 18.
  • the permanent magnet unit and the rotor core are bundled and fixed together by an insulated wire 25 made of an insulating material.
  • 3A to 3C show another way of connecting and fixing the permanent magnet unit 11 and the rotor core 18. In FIGS.
  • the assembling method of the permanent magnet unit 11 and the rotor core 18 is a plug-in type, specifically, on both sides of the permanent magnet unit 11 a groove is provided, and a convex portion matching the position and shape of the groove of the permanent magnet unit is provided on the outer circumferential surface of the rotor core 18, and the rare earth permanent magnet unit and the rotor core pass through the concave portion
  • the groove and the boss are fitted to each other.
  • a boss may be provided on both side faces of the permanent magnet unit 1 1
  • a groove matching the position and shape of the boss portion of the permanent magnet unit may be provided on the outer circumferential surface of the rotor core 18 .
  • the rare earth permanent magnet monomer and the rotor core are bundled and fixed together by an insulated wire.
  • 4A to 4C also show another way of connecting the permanent magnet monomer 11 to the rotor core 18.
  • the assembly method of the permanent magnet unit 11 and the rotor core 18 is in-line, specifically, the permanent magnet unit is embedded in the rotor core 18.
  • the shape of the permanent magnet monomer 11 is rectangular or trapezoidal.
  • an electroplating protective layer or a resin protective layer such as nickel plating or a coating resin, is used on the surface of the permanent magnet monomer 11 to prevent corrosion and reduce heat radiation, prolong the life of the rare earth permanent magnet, and have a cooling effect.
  • the permanent magnet 10 of the present invention and the coil winding 16 have the same excitation magnetic field direction, and the closed loop formed by the coil winding 16 and the diode 17 functions as an internal pressure regulating system.
  • a conductor strip may be used instead of a coil winding, or a mixture of coil windings and conductor strips may be employed.
  • the straight axis and the intersecting axis are the professional terms in the construction of the motor, and in Fig. 2B are the longitudinal central axis and the lateral central axis of the rotor.
  • Conductor strip It is mainly used in large generators. Specifically refers to bare copper rod bars or aluminum bars. The two ends of the conductor strip are connected to the short-circuiting ring and the rectifying component to form a closed loop, which is equivalent to a closed loop formed by connecting the coil winding and the rectifying component in series.
  • the upper left and lower right corner rotor poles of the rotor core in Fig. 2B, or the upper right and lower left corner rotor pole edges are respectively provided with pole piece notches, which constitute a left-axis asymmetry centered on the straight axis Magnetic circuit, which is equivalent to Figure 2E with the straight axis d as the center, the upper left and lower right cross-sectional areas of the rotor core are equal, the upper right and lower left cross-sectional areas are equal, but the upper left and upper right cross-sectional areas are not equal, lower left
  • the cross-sectional area is different from the lower right side, and constitutes a magnetic circuit asymmetrically centered on the straight axis d to achieve the internal magnetic adjustment function.
  • FIG. 5A and 5B are views showing the structure of a stator core of the present invention.
  • a chute 28 is provided on the inner surface of the stator core 21 of the present invention for embedding stator windings.
  • the chute stacking structure can effectively suppress the interference of the tooth harmonics on the generator voltage waveform, reduce the resistance generated by the magnetic pull force when the generator is running at no load, and solve the technology of large magnetic resistance of the rare earth permanent magnet generator. problem.
  • the stator core is formed by stacking a plurality of silicon steel sheets, and a W-shaped ventilation groove 29 is formed on the outer outer edge of the silicon steel sheet to strengthen The heat dissipation effect improves the working efficiency of the generator.
  • FIG. 6 shows a block diagram of the external voltage regulation system of the present invention.
  • the external voltage regulation system of the present invention comprises a control power rectifier circuit 51, a generator tap selection relay circuit 52, a relay power drive circuit 53, a sampling circuit 54, an A/D conversion circuit 55, a microprocessor 56 and a button display circuit 57, wherein
  • the input end of the control power rectifying circuit 51 is connected to the output end of the control power coil winding 24 for converting the alternating current output of the control coil winding into direct current to supply power to the entire external voltage regulating system.
  • the generator tap selection relay circuit 52 is for selecting two taps connected to the working coil winding 23 to output the output voltage of the generator.
  • An output of the relay power drive circuit 53 is coupled to the generator tap selection relay circuit 52 for driving the generator tap selection relay circuit 52.
  • the input of the sampling circuit 54 is connected to the output of the generator tap selection relay circuit 52 for collecting the voltage effective value, the current effective value and the frequency on the output winding line of the working coil.
  • the input of the A/D conversion circuit 55 is connected to the output of the sampling circuit 54 for analog-to-digital conversion of the acquired analog quantity.
  • the microprocessor 56 is connected to the input end of the relay power driving circuit 53, the output end of the A/D conversion circuit 55, and the key display circuit 57 via a bus for setting the rated voltage value and the error reference amount, and the receiving sampling circuit 54.
  • the measured voltage rms value, current rms value, and frequency on the output winding of the working coil winding are calculated, and the amount of error between the measured voltage rms value and the rated voltage value is calculated.
  • the microprocessor 56 controls the relay power drive circuit 53 to cause the generator tap selection relay circuit 52 to be selectively connected to a different tap on the working coil winding 23 to access Different lengths of the stator working coil windings, the adjusted generator output voltage is output from the motor tap selection relay circuit 52, thereby achieving the purpose of automatic external voltage regulation.
  • the permanent magnet magnetic field on the rotor of the generator of the present invention is the magnetic flux of the main magnetic field ⁇ main, and the exciting magnetic flux of the coil winding on the rotating shaft is ⁇ pair.
  • the invention combines the internal and external pressure regulating systems organically, and solves the problem that the output voltage of the rare earth permanent magnet generator is not The problem of adjustment.
  • the internal voltage regulation system has a compound excitation function.
  • the generated magnetic field can increase the load voltage of the generator, reduce the output voltage fluctuation caused by the load change, and increase the voltage regulation rate.
  • the internal pressure regulation system acts as a primary simple coarse pressure regulation, which is the first pressure regulation, which can only make the voltage of the generator fluctuate within a range.
  • the external pressure regulation system is the second pressure regulation by the power electronic circuit on the basis of the internal pressure regulation system, which plays the role of advanced fine pressure regulation.
  • the internal pressure regulation system and the external pressure regulation system are related to each other and complement each other.
  • Primary pressure regulation can have advanced pressure regulation. If only the external voltage regulation system is used, when the load or the rotation speed changes greatly, because the coil length of the working coil winding is limited, the increased AV may not be sufficient, and the precise voltage regulation purpose is not achieved. If only the internal pressure regulation system is used, the generator output voltage will not reach the precise voltage regulation purpose. Since the permanent magnet of the rotor is the main magnetic field, the coil winding is a secondary magnetic field. If the magnetic flux of the coil winding is excessively increased, the advantage of the permanent magnet generator is lost. Therefore, only the internal and external pressure regulating systems can be combined to solve the problem of pressure regulation of rare earth permanent magnet generators. After adopting the above technical solution, the generator voltage of the invention can maintain the output rated value, the generator output voltage is more stable, and the power supply quality is better. According to the test, the load waveform distortion rate of the present invention is less than 5%.
  • Figure 8 is a circuit diagram of the generator tap selection relay circuit 52 and the relay power drive circuit 53 of the present invention.
  • the working coil winding of the left generator outputs a total of four tap contacts for connection with the tap selection relays ⁇ 3, ⁇ 4, and the Q1 and Q4 transistors respectively amplify the high and low driving signals of CUT01 and CUT02 to push the relays K3 and ⁇ 4.
  • the relay is determined according to the micro-processing procedure to determine the state of the ⁇ 3, ⁇ 4 relays, and the contacts of the appropriate working coil windings are selected to achieve the purpose of voltage regulation.
  • FIG. 9 is a circuit diagram of the sampling circuit 54 and the A/D conversion circuit 55 of the present invention.
  • the A/D conversion circuit uses a CS5460 chip, and XI and ⁇ 2 are connected to the relay voltage output of FIG. 8, Pl, ⁇ 2 and the load are directly connection.
  • Resistors Rl, R2 are the voltage divider resistors of the output voltage, T1 is the current transformer, and their sampling signals are directly connected to U1 to complete the A/D conversion, which obtains the effective value and frequency value of the voltage and current on the load line.
  • Fig. 10 is a circuit diagram of the control power supply rectifying circuit 51 of the present invention.
  • D2, D3, D4, and D5 form a rectifying bridge, and then U5 and U7 respectively output stable DC voltages of +12V and +5V for the controller to operate.
  • FIG. 1 is a circuit diagram of the button display circuit 57 of the present invention.
  • U8 ⁇ U13 are 74HC164 chips, respectively driving 6 digital tubes LED1 ⁇ LED6, and the digital tube can display the voltage effective value and the current is effective. Data such as value, power value, frequency, accumulated working time, and number of power-on. Since the display of the present invention can display the voltage effective value, the current effective value and the frequency on the generator output line obtained by the sampling circuit under the control of the microprocessor, the worker can obtain the above information in real time. When overcurrent and overcurrent occurs in the generator output, the overpressure and overcurrent can be automatically controlled by the automatic air switch on the generator panel.
  • the microprocessor of the present invention can be implemented by a single-chip microcomputer of the type ATMEGA8.
  • Figure 12 further illustrates a flow chart for analyzing the amount of error between the measured voltage rms value and the nominal voltage value by the microprocessor of the present invention.
  • the flow chart is for the case where a total of four tap contacts are outputted for the working coil winding of the generator of Fig. 8. In practical applications, the number of tap contacts can be varied according to the needs of voltage adjustment.
  • the error percentage can be set, for example, to 3%, and G-ST corresponds to four different cases in which the generator tap selects the relay circuit to select the tap contact of the working coil winding.
  • the microprocessor connects the generator tap selection relay circuit to different taps on the working coil winding, and connects to different lengths of the stator working coil winding, thereby realizing automatic The purpose of external pressure regulation.
  • the present invention also performs a limit processing of 0 G-ST 3 for G-ST, and when G-ST is less than 0, it is treated as G-ST is equal to 0; when G-ST is greater than 3 When the G-ST is equal to 3, it is processed.
  • FIG. 13 is a block diagram showing the construction of a rotor assembly of another embodiment of the hybrid excitation synchronous generator of the present invention with an internal and external pressure regulating system.
  • the stator structure and the external pressure regulating system of this embodiment are the same as those of the above embodiment, except for the structure of the rotor assembly.
  • the rotor core 18a has an irregular cylindrical shape and is fixed to the rotating shaft 13.
  • Four convex magnetic poles 63a, 64a, 65a, 66a are provided along the circumferential direction of the rotor core 18a.
  • Each of the convex magnetic poles is spaced apart from each other by 90°, and is composed of a pole body and a pole piece located at the top of the pole body, and the width of the pole body is smaller than the width of the pole piece.
  • a coil winding 16a is wound around the poles of the respective convex poles, and the coil windings 16a and the rectifier assembly are connected in series to form a closed loop, thereby forming an internal pressure regulating system.
  • the rectifying component is a diode 17a.
  • conductor strips may be used instead of coil windings or in the form of a mixture of coil windings and/or conductor strips.
  • a plurality of permanent magnet monomers l la are fixed on the surface of the pole piece of each convex magnetic pole, the number of permanent magnet monomers on each convex magnetic pole is equal, and the polarities of the permanent magnet monomers on the same convex magnetic pole are the same;
  • the polar arrangement of the permanent magnet cells on the two convex magnetic poles is reversed. That is, the permanent magnets on one convex magnetic pole are all disposed with the N pole facing the air gap, and the permanent magnets on the adjacent one of the convex magnetic poles are all disposed with the S pole facing the air gap.
  • the polarities of the permanent magnet cells on the opposite two convex poles are the same, that is, both the N pole faces the air gap or the S pole faces the air gap.
  • the direction of the permanent magnetic field generated by the permanent magnet unit 11a is the same as the direction of the electromagnetic field generated by the closed loop formed by the coil winding 16a and the rectifying unit.
  • the number of the convex magnetic poles is not limited to the above four, and may be an even number larger than two, such as six, eight, sixteen, etc., and the convex magnetic poles are equally spaced in the circumferential direction.
  • the number of permanent magnet cells on each convex pole is equal, and the polarities of the permanent magnet cells on the same convex pole are the same; the polarities of the permanent magnets on the adjacent two convex poles are opposite, that is, a convex magnetic pole
  • the upper permanent magnet cells are all disposed on the N-pole facing the air gap, and the permanent magnets on the other adjacent convex magnetic pole are all disposed on the S-pole facing the air gap.
  • the direction of the permanent magnetic field generated by the permanent magnet unit 11a on each of the convex magnetic poles is the same as the direction of the electromagnetic field generated by the closed loop formed by the coil winding 16a and the rectifying unit.
  • the generator of the invention may only employ a regulating method of an external pressure regulating system. At this time, only the permanent magnets are excited on the rotor, and the coil windings and the rectifying components are no longer provided.
  • the generator of the present invention may also employ only the pressure regulating method of the internal pressure regulating system. At this point, the external pressure regulation system is cancelled and relies solely on the coil windings on the rotor for internal regulation.
  • the closed loop formed by the coil winding and/or the conductor strip and the rectifying component of the present invention functions as an internal voltage regulating system.
  • the internal pressure regulating system has a complex Excitation function
  • the generated magnetic field can increase the load voltage of the generator, reduce the output voltage fluctuation caused by the load change, and increase the voltage regulation rate.
  • the external voltage regulation system further adjusts the voltage through the power electronic circuit based on the internal voltage regulation system, and the external voltage regulation system can change according to the output voltage value. Different contacts on the working coil windings on the generator stator are connected to different stator working armature coil lengths to achieve precise adjustment of the generator output voltage.
  • the external voltage regulating system of the generator of the present invention is separately separated from the driving system of the prime mover.
  • the internal and external pressure regulating systems can work together to more accurately adjust the output voltage of the generator.
  • the generator maintains the output rated voltage.
  • the permanent magnet of the hybrid excitation synchronous generator with internal and external pressure regulating system is made of NdFeB material, which maintains the characteristics of strong excitation, good voltage waveform and high efficiency of rare earth permanent magnet generator, and is small in size and weight. Light and maintenance free.
  • the rare earth permanent magnet material has a strong magnetic field, the generator is small in size, light in weight, and there are many electronic components on the rotor, so that maintenance-free can be realized.
  • the generator excitation system of the invention is mainly composed of permanent magnets, and the rotor coil and/or the conductor strip are only used as the excitation voltage regulating coil, brushless, and no slip ring. Compared with the traditional generator, the structure is simple, the operation is reliable, and the operation is convenient. No radio frequency interference.
  • the hybrid excitation synchronous generator with internal and external pressure regulating system of the invention has strong anti-overload capability and can operate in a harsh environment.
  • the permanent magnet does not increase the temperature during operation, so the generator has small temperature rise, long life, strong sudden load, sudden load rejection, good transient response, and non-linear load for air conditioner, electric motor, switching power supply, UPS uninterruptible power supply, etc.
  • the load capacity of the product is much larger than that of the conventional generator, and it can start a motor with its own power.
  • the hybrid excitation synchronous generator with internal and external pressure regulating system of the invention has high efficiency, remarkable energy saving effect, high power density and high power factor. Since the present invention mainly uses a permanent magnet to generate a magnetic field, excitation does not require energy consumption. Through experiments, the generator of the present invention saves fuel by 25% compared with the conventional electromagnetic induction generator. Each generation of electricity saves about 50 grams of fuel compared with the conventional generator, and increases the power generation by 15% compared with the conventional generator.
  • the hybrid excitation synchronous generator with internal and external pressure regulating system has low noise, small electromagnetic interference and good electromagnetic compatibility.
  • the generator of the present invention is mainly a magnetic field generated by a rare earth permanent magnet, so electromagnetic noise is small, and interference to radio communication and electronic equipment is small.
  • the hybrid excitation synchronous generator with internal and external pressure regulating system of the invention has low cost and is convenient for mass production. Since the present invention employs a hybrid excitation method, the rare earth permanent magnets on the rotor are reduced, which saves expensive rare earth materials, and the waste in the stator punch is used for the rotor punching, which also saves raw materials and facilitates mass production. Production, reducing costs.
  • the stator of the hybrid excitation synchronous generator with internal and external pressure regulating system adopts a chute stacking structure, which can effectively suppress the interference of the tooth harmonics on the generator voltage waveform and reduce the no-load operation of the generator.
  • the resistance generated by the magnetic pull force solves the technical problem of large magnetic resistance of the rare earth permanent magnet generator.
  • the stator core of the hybrid excitation synchronous generator with internal and external pressure regulating system also has a W-shaped ventilation groove on the outer edge of the stator core, which enhances the heat dissipation effect and improves the working efficiency of the generator.
  • the rare earth permanent magnet of the hybrid excitation synchronous generator with internal and external pressure regulating system of the invention adopts a protective layer such as electroplating to prevent corrosion and reduce heat radiation, prolong the life of the rare earth permanent magnet, and has a cooling effect.
  • the hybrid excitation synchronous generator with internal and external pressure regulating system has ventilating holes symmetrically on the rotor core with the rotating shaft as the center, so that the axial airflow of the rotor is increased, and the temperature rise of the rotor is low, and the reinforcement is enhanced.
  • the overload capacity of the generator is provided.
  • the width of the bottom of the slot of the rotor core of the hybrid excitation synchronous generator with internal and external pressure regulating system of the present invention is larger than the width of the mouth of the slot, thereby improving the performance of the motor.
  • the hybrid excitation synchronous generator with internal and external pressure regulating system of the invention has simple structure and light weight.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Control Of Eletrric Generators (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

L'invention concerne un générateur synchrone à excitation hybride doté de systèmes intérieur et extérieur de régulation de tension et son procédé de régulation de tension. Un circuit fermé constitué d'un enroulement (16, 16a) et/ou d'une bande conductrice ainsi que d'un ensemble de redressement est disposé sur une couronne rotor (18,18a) du générateur synchrone. Quand l'ensemble rotor (1) fonctionne, le champ électromagnétique généré par le circuit fermé a la même direction que le champ magnétique permanent généré par un aimant permanent (10). Les deux champs magnétiques sont mélangés et superposés pour une excitation commune afin de régulerla tension de sortie du générateur à l'intérieur. Le générateur synchrone a également un système extérieur de régulation de tension. Le système extérieur de régulation de tension contrôle la tension de la ligne de sortie de l'enroulement du stator en fonctionnement (23) en temps réel et calcule l'erreur entre la tension mesurée et la tension nominale. Sur la base de la différence entre l'erreur et l'erreur de référence de réglage, un des différents branchements correspondant à la tension de sortie différente dans l'enroulement du stator (23) en fonctionnement est sélectionné automatiquement de façon à réguler la tension de sortie du générateur à l'extérieur.
PCT/CN2007/070604 2007-08-31 2007-08-31 Générateur synchrone à excitation hybride doté de systèmes intérieur et extérieur de régulation de tension et son procédé de régulation de tension Ceased WO2009026767A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2007/070604 WO2009026767A1 (fr) 2007-08-31 2007-08-31 Générateur synchrone à excitation hybride doté de systèmes intérieur et extérieur de régulation de tension et son procédé de régulation de tension

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PCT/CN2007/070604 WO2009026767A1 (fr) 2007-08-31 2007-08-31 Générateur synchrone à excitation hybride doté de systèmes intérieur et extérieur de régulation de tension et son procédé de régulation de tension

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WO2012013885A1 (fr) * 2010-07-29 2012-02-02 Valeo Equipements Electriques Moteur Machine electrique tournante synchrone avec rotor a double excitation
FR2963506A1 (fr) * 2010-07-29 2012-02-03 Valeo Equip Electr Moteur Machine electrique tournante synchrone avec rotor a double excitation
FR2963501A1 (fr) * 2010-07-29 2012-02-03 Valeo Equip Electr Moteur Machine electrique tournante synchrone avec rotor a double excitation
FR2963505A1 (fr) * 2010-07-29 2012-02-03 Valeo Equip Electr Moteur Machine electrique tournante synchrone avec rotor a double excitation
WO2013029676A1 (fr) * 2011-08-31 2013-03-07 Siemens Aktiengesellschaft Transmission magnétique comprenant des bobines autour de pôles magnétiques à excitation permanente
CN107404206A (zh) * 2017-09-26 2017-11-28 上海马拉松·革新电气有限公司 一种4mw同轴互馈式同步电动机
CN107612259A (zh) * 2017-10-31 2018-01-19 天津昊野科技有限公司 一种耐油高功率密度高速永磁同步电机
CN112072812A (zh) * 2020-09-17 2020-12-11 山东理工大学 带真空泵的混合励磁发电机
CN113597726A (zh) * 2018-10-30 2021-11-02 菲艾姆股份有限公司 电机及操作电机的方法

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CN2720713Y (zh) * 2004-08-11 2005-08-24 苏州百胜稀土动力有限公司 新型组合励磁稀土永磁发电机

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EP1233498A2 (fr) * 2001-02-20 2002-08-21 Hideo Kawamura Moteur-générateur utilisant des aimants permanents
CN2577499Y (zh) * 2002-07-10 2003-10-01 牛成民 稳压永磁发电机
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CN103038987B (zh) * 2010-07-29 2015-11-25 法雷奥电机设备公司 具有混合励磁转子的同步旋转电机
CN103038988A (zh) * 2010-07-29 2013-04-10 法雷奥电机设备公司 具有混合励磁转子的同步旋转电机
FR2963504A1 (fr) * 2010-07-29 2012-02-03 Valeo Equip Electr Moteur Machine electrique tournante synchrone avec rotor a double excitation
FR2963501A1 (fr) * 2010-07-29 2012-02-03 Valeo Equip Electr Moteur Machine electrique tournante synchrone avec rotor a double excitation
FR2963505A1 (fr) * 2010-07-29 2012-02-03 Valeo Equip Electr Moteur Machine electrique tournante synchrone avec rotor a double excitation
WO2012022864A3 (fr) * 2010-07-29 2012-04-12 Valeo Equipements Electriques Moteur Machine electrique tournante synchrone avec rotor a double excitation
WO2012022863A3 (fr) * 2010-07-29 2012-05-10 Valeo Equipements Electriques Moteur Machine electrique tournante synchrone avec rotor a double excitation
CN103038988B (zh) * 2010-07-29 2015-07-29 法雷奥电机设备公司 具有混合励磁转子的同步旋转电机
US9006950B2 (en) 2010-07-29 2015-04-14 Valeo Equipements Electriques Moteur Synchronous rotary electric machine having a double excitation rotor
CN103038987A (zh) * 2010-07-29 2013-04-10 法雷奥电机设备公司 具有混合励磁转子的同步旋转电机
FR2963506A1 (fr) * 2010-07-29 2012-02-03 Valeo Equip Electr Moteur Machine electrique tournante synchrone avec rotor a double excitation
WO2012013885A1 (fr) * 2010-07-29 2012-02-02 Valeo Equipements Electriques Moteur Machine electrique tournante synchrone avec rotor a double excitation
US9197118B2 (en) 2010-07-29 2015-11-24 Valeo Equipements Electriques Moteur Synchronous rotary electric machine having a hybrid-excitation rotor
US9160218B2 (en) 2010-07-29 2015-10-13 Valeo Equipements Electriques Moteur Synchronous rotary electric machine having hybrid-excitation rotor
WO2013029676A1 (fr) * 2011-08-31 2013-03-07 Siemens Aktiengesellschaft Transmission magnétique comprenant des bobines autour de pôles magnétiques à excitation permanente
CN103765742A (zh) * 2011-08-31 2014-04-30 西门子公司 具有围绕永磁激励的磁极的线圈的磁性传动机构
CN107404206A (zh) * 2017-09-26 2017-11-28 上海马拉松·革新电气有限公司 一种4mw同轴互馈式同步电动机
CN107404206B (zh) * 2017-09-26 2023-06-20 上海马拉松·革新电气有限公司 一种4mw同轴互馈式同步电动机
CN107612259A (zh) * 2017-10-31 2018-01-19 天津昊野科技有限公司 一种耐油高功率密度高速永磁同步电机
CN107612259B (zh) * 2017-10-31 2023-08-04 天津昊野科技有限公司 一种耐油高功率密度高速永磁同步电机
CN113597726A (zh) * 2018-10-30 2021-11-02 菲艾姆股份有限公司 电机及操作电机的方法
US20210384781A1 (en) * 2018-10-30 2021-12-09 Feaam Gmbh Electrical machine and method for operating the electrical machine
CN112072812A (zh) * 2020-09-17 2020-12-11 山东理工大学 带真空泵的混合励磁发电机

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