CN1064376A - Ac speed adjusting brushless wound induction motor - Google Patents
Ac speed adjusting brushless wound induction motor Download PDFInfo
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- CN1064376A CN1064376A CN91107140A CN91107140A CN1064376A CN 1064376 A CN1064376 A CN 1064376A CN 91107140 A CN91107140 A CN 91107140A CN 91107140 A CN91107140 A CN 91107140A CN 1064376 A CN1064376 A CN 1064376A
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Abstract
A kind of AC speed adjusting brushless wound induction motor is made up of two stators and a rotor.Its rotor is divided into two sections, and the rotor winding of himself is respectively arranged, and three line ends of two rotor windings connect in that casing is inner, connects three leads in the junction again and causes non-shaft stretching end by shaft central hole and be connected with the rotary resistor that is contained in non-shaft stretching end.Also resistor can be placed the middle gap of two-stage rotor.The mode of connection of change stator winding and pressure regulation are with regard to the size and the phase difference of two stator rotating magnetic fields of scalable, and also rotatable one of them stator winding carries out mechanical phase shift and obtains high starting torque, the performance of low starting current and classification or stepless speed regulation.
Description
The utility model relates to a kind of AC speed adjusting brushless wound induction motor, is applicable to all kinds of capacity motor of high starting torque, low starting current and stepless speed regulated AC.
Induction motor has mouse-cage type and winding-type two classes, and cage induction motor across-the-line starting electric current is 6～7 times of rated current, causes the big pressure drop of line voltage, is unfavorable for that other electric equipment normally moves on motor and the electrical network.Adopt reduced voltage starting, though limited starting current, starting torque and the proportional decline of voltage squared simultaneously.For limiting starting current, the manufacturing machine of enough starting torques is arranged again, then adopt Wound induction motor, the slip ring by brush series resistor or static frequency sensitive trheostat in rotor loop start.At present, the Wound induction motor speed regulating method has Switch Rotor outer meeting resistance, copped wave and serial connection speed governing.Convert resistance can only step speed regulation, uses contactor many, poor reliability.The device complexity of copped wave and serial connection speed governing, the cost height.Because brush and slip ring are arranged, wearing and tearing easily produce spark and noise, need often to safeguard and maintenance, are unfavorable for safety and reliable production, are not suitable for inflammable and explosive occasion.
The purpose of this utility model is to provide a kind of AC speed adjusting brushless wound induction motor at the deficiencies in the prior art, it has cancelled slip ring and brush, high starting torque is arranged, the good starting performance of low starting current, carry out large-scale stepless speed regulated AC without conversion method, efficient is higher than the speed governing of existing rotor outer meeting resistance energy consumption.
The alternating-current brushless Wound induction motor that the utility model provides such as Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, shown in Figure 7.
Fig. 1 is the AC speed adjusting brushless wound induction motor structural representation.
(1) casing, (2) (3) stator core, (4) (5) stator winding, (6) rotating shaft, (7) bearing, (8) (9) rotor core, (10) (11) rotor winding, (12) leading-out terminal, (13) insulated conductor, (14) axle center hole, (15) resistor, (16) bolt, (17) rotary resistor, (18) bolt, (19) binding post, (20) sleeve, (21) key, (22) spring coil, (23) protective cover, (24) ventilation hole, (25) blasthole, (26) apopore.
Two stator cores (2) and (3) are equipped with in motor casing (1) inboard, wherein are embedded with stator winding (4) and (5) of aligned identical.Being supported in the rotating shaft (6) on the bearing (7) has two-stage rotor iron core (8) and (9), and rotor winding (10) and (11) are respectively arranged in the two-stage rotor iron core.Three leading-out terminals (12) of rotor winding (10) are distinguished corresponding connection with three leading-out terminals of rotor winding (11), and draw three respectively in the junction and thoroughly do away with edge lead (13), lead to non-shaft stretching end by shaft central hole (14), link with the binding post (19) of rotary resistor (17).
Fig. 2 is the end view that compresses iron plate.
Fig. 3 is the end view of a slice rotary resistor.
Rotary resistor is made up of three, six or multi-disc high resistant rate material, and wiring hole (31) is arranged on the resistor, can be connected into three-phase Y shape or △ shape.Between every sheet resistor device or resistor and both sides compress and are provided with high temperature insulation pad (16) between the iron plate (15), whole rotary resistor compresses iron plate by two and connects into integral body with bolt (18), compresses the usefulness that has six holes (28) to pass for fishbolt (18) on the iron plate.By the dovetail groove on the sleeve (20), will compress iron plate and be fixed on the sleeve.Keyway (30) is arranged on the sleeve, sleeve is fixed tightly in the rotating shaft (6), use spring coil (22) locking at last, to prevent that resistor is to moving axially with key (21).
Fig. 4 is the cutaway view of another example of rotary resistor.
Fig. 5 is the vertical view of iron plate (35).
The also available nickel filament of rotary resistor is wrapped in pipe (33) that electroceramics or heat-resistant insulation material make and goes up and constitute six sub-resistance devices, six holes (37) is arranged for passing bolt (34) above the iron plate (35), and is with bolt that iron plate and pipe clamp is tight.Six resistors are connected into Y shape or △ shape with in parallel or series connection, and three last leading-out terminals cause hole (39), link this binding post and iron plate insulation with the lead (13) of drawing in bolt and the rotor winding.Iron plate is fixed tightly on the sleeve (36) by dovetail groove, and sleeve connects with rotating shaft with key (21) by keyway (40), with spring coil (22) locking.
Rotary resistor (17) also can be placed on the middle gap of two rotor cores in the casing, no longer needs axle center hole and lead-out wire, for the bigger motor of capacity, can install strong thermantidote and ventilation hole additional in the middle of casing.
Change the also available manual drum switch of the stator winding mode of connection or other reversing switch.
When carrying out variable voltage control, also can use voltage regulating transformer, thyristor voltage regulation device.Also can be without regulator, and make one of them stator winding mechanical rotation phase shift obtain stepless speed regulation with the turbine worm transmission.
Fig. 6 is the main electrical scheme illustration figure of governing system.
UVW is a three phase mains among the figure, and KP isolates knife switch.When requiring motor just changeing, contactor JK0 closure, JK1 disconnects; When requiring counter-rotating, the JK1 closure, JK0 disconnects; ZR is the overcurrent fuse.CT is a current transformer.SL is voltage, the little saturable reactor of current waveform distortion through particular design, and A1, B1, C1, A2, B2, C2 and X1, Y1, Z1, X2, Y2, Z2 are respectively two stator winding (4) of motor and the head end and the end of (5).JK2, JK3, JK4, JK5, JK6, JK7 be the head that changes stator winding (5), the terminal mode of connection to obtain the required contactor of different phase shifts, contactor also can change the thyristor noncontacting switch into, to be applicable to inflammable and explosive occasion.When JK2 and JK7 closure, and JK3～JK6 disconnects, then stator winding (4) identical with the rotating magnetic field that (5) are produced (0 ° of phase place); When JK3 and JK7 closure, and JK2, JK4, JK5, JK6 disconnect, and then two rotating magnetic field phase shifts are 120 °; When JK4 and JK6 closure, and JK2, JK3, JK5, JK7 disconnect, and then phase shift is 60 °; When JK5 and JK6 closure, and JK2, JK3, JK4, JK7 disconnect, and then phase shift is 180 °.So just can obtain " coarse adjustment " of step-governor d or rotating speed.During starting, as 180 °, 120 °, 60 °, 0 ° of phase shift successively, then can obtain high starting torque, low starting current starts level and smooth good starting performance.As regulate the direct current size of the DC control circuit of saturable reactor SL, thus change its equivalent reactance, can realize pressure regulation, can realize stepless speed regulation or speed " fine tuning " like this.
Fig. 7 is the illustration figure of automatic speed regulation control system.
The automatic speed regulation control system is made up of single chip microcomputer (41), memory (42) and I/O expansion mouthful (43), power supply (44) connects after plug-in strip KP, stabilized voltage power supply (45) is supplied with The whole control system, synchronous generator (46) detects the supply voltage zero crossing, and produce pulse signal to CPU request interruption, after CPU requires to calculate according to speed governing, remove to trigger thyristor (48) by trigger impulse generator (47), the DC loop (50) of sending into saturable reactor behind rectifier (49) is to realize variable voltage control.The AC signal of current transformer CT becomes d. c. voltage signal (51) and (52).Velometer (53) detects the actual speed of motor.(54) produce the velocity setting instruction.(55) be variable connector, (56) are A/D converter, and (58) and (59) are respectively auxiliary relay and A.C. contactor.(60) be light-emitting diode, the A.C. contactor that indication was closed at that time.(61) be the electric current of stator winding (4) and (5) and the selection display switch or the button of rotating speed, and shown by charactron (57).(62) be the DIP deploy switch, the requirement of starting torque adjusted, so that starting process is steady according to load characteristic.(63) be the command switch or the button of just commentaries on classics of motor, stall or counter-rotating.
AC speed adjusting brushless wound induction motor of the present utility model has following advantage:
1, motor is made up of two stators and a rotor.It has simple in structure, and is easily manufactured, only needs just can regulate the size and the phase difference of two stator winding rotating magnetic fields by changing the mode of connection and pressure regulation.When size that changes a stator winding rotating magnetic field wherein and phase difference, will there be electric current to pass through resistor, be equivalent to increase the equivalent resistance of rotor winding like this, improved power factor and efficient, efficient improves greatly when making low speed.Cooperate the needs of load characteristic and load torque to carry out ac voltage speed control, further enlarged speed adjustable range.And when starting, can obtain high starting torque, low starting current, and need not brush, slip ring and additional starting device.Cost is low, the reliability height.
2, motor is only drawn the head end and the end of every phase winding, and no longer tap from winding by the different modes of connection, just can obtain 0 °, and 60 °, 120 °, 180 ° phase shift.For stepless speed control on a large scale, only with regulator to the stator winding pressure regulation, particularly the corresponding voltage that reduces when low speed has reduced the input electromagnetic power, has improved electric efficiency, corresponding slip loss reduces, temperature rise is low, has increased the electrical machine insulation life-span, is particularly useful for blower fan, load of the pumps, motor can also constitute interchange automatic speed regulation control system.
3, rotary resistor is installed in the non-shaft stretching end of casing, the safety that the high temperature of the resistor of serious heating can not threaten electrical machine insulation when low speed.Simultaneously, the physical dimension of resistor is not subjected to the restriction of motor case inner space, can amplify so that increase the thermal capacity of motor, and this version makes the type of cooling of resistor be greatly improved, can force cooling as air-cooled or water spray cooling, be very important to large-size machine.Also resistor can be installed in the middle gap of two-stage rotor iron core.
Embodiment:
AC speed adjusting brushless wound induction motor of the present utility model (1) is simple in structure, easily manufactured, casing, stator and rotor etc. all can be in the processing of general motor manufactory, and rotary resistor selects high resistant rate material to be made also available nickel filament coiling by machinings such as common car, brills.Other electronic components and connector can directly be bought in the shop, and those skilled in the art all can be pressed drawing assembling, debugging and ordinary production.
Claims (5)
1, a kind of AC speed adjusting brushless wound induction motor [1] contains casing, stator and rotor.It is characterized in that this motor casing (1) inboard is equipped with two stator cores (2) and (3), wherein be embedded with stator winding (4) and (5) of aligned identical, be supported in the rotating shaft (6) on the bearing (7) two-stage rotor iron core (8) and (9) are arranged, three leading-out terminals corresponding connections of difference that three leading-out terminals (12) with the rotor winding (11) of rotor winding (10) and (11) rotor winding (10) are respectively arranged in the two-stage rotor iron core, and draw three respectively in the junction and thoroughly do away with edge lead (13), the binding post (19) that leads to non-shaft stretching end and rotary resistor (17) by shaft central hole (14) links, wiring hole (31) is arranged on the resistor, can be connected into Y shape or Δ shape, between every sheet resistor device or resistor and both sides compress and are provided with high temperature insulation pad (16) between the iron plate (15).Whole rotary resistor compresses iron plate by two and connects into integral body with bolt (18).The mode of connection, pressure regulation or the mechanical rotation phase shift that change stator winding can obtain the premium properties of high starting torque, low starting current and classification or stepless speed regulation, also can be realized by the automatic speed regulation control system.
2, according to the described AC speed adjusting brushless wound induction motor of claim 1, the resistor that it is characterized in that this motor is made up of a slice, three or multi-disc high resistant rate material.Also available nickel filament is entangled in the pipe (33) of electroceramics or heat-resistant insulation material system and goes up six sub-resistance devices of formation, six holes (37) is arranged for passing bolt (34) above the iron plate (35), and is with bolt that iron plate and pipe clamp is tight.Six sub-resistance devices are connected into Y shape or △ shape with in parallel or series connection.Three last leading-out terminals cause hole (39), link this binding post and iron plate insulation with the lead (13) of drawing in bolt and the rotor winding.Iron plate is fixed tightly on the tube (36) by dovetail groove, and sleeve connects with rotating shaft (6) with key (21) by keyway (40), with spring coil (22) locking.Rotary resistor (17) also can be placed on the middle gap of two-stage rotor iron core in the casing.
3, according to claim 1 or 2 described AC speed adjusting brushless wound induction motors, it is characterized in that the middle UVW three phase mains of governing system main junction (6) of this motor, KP isolates knife switch.When requiring motor just changeing, contactor JKO closure, JK1 disconnects; When requiring counter-rotating, the JK1 closure, JK0 disconnects.ZR is the overcurrent fuse, CT is a current transformer, SL is voltage, the little saturable reactor of current waveform distortion through particular design, A1, B1, C1, A2, B2, C2 and X1, Y1, Z1, X2, Y2, Z2 are respectively two stator winding (4) of motor and the head end and the end of (5), JK2, JK3, JK4, JK5, JK6, JK7 be the head that changes stator winding (5), the terminal mode of connection to obtain the required contactor of different phase shifts, contactor also can change the thyristor noncontacting switch into.When JK2 and JK7 closure, and JK3～JK6 disconnects, then the rotating magnetic field homophase (0 ° of phase place) that produced of stator winding (4) and (5); When JK3 and JK7 closure, and JK2, JK4, JK5, JK6 disconnects, and then two rotating magnetic field phase shifts are 120 °; When JK4 and JK6 closure, and JK2, JK3, JK5, JK7 disconnect, and then phase shift is 60 °; When JK5 and JK6 closure, and JK2, JK3, JK5, JK7 disconnect, and then phase shift is 180 °.So just can obtain " coarse adjustment " of step-governor d or rotating speed.During starting, as 180 °, 120 °, 60 °, 0 ° of phase shift successively, then can obtain high starting torque, low starting current starts level and smooth good starting performance.As regulate the direct current size of the DC control circuit of saturable reactor SL, thus change its equivalent reactance, carry out pressure regulation, can realize stepless speed regulation or speed " fine tuning " like this.
4, according to claim 1 or 2 described AC speed adjusting brushless wound induction motors, its feature is made up of single chip microcomputer (41) memory (42) and I/O expansion mouthful (43) in the automatic speed regulation control system (7) of this motor, power supply (44) connects after plug-in strip KP, stabilized voltage power supply (45) is supplied with The whole control system, synchronous generator (46) detects the supply voltage zero crossing, and produce pulse signal to CPU request interruption, after CPU requires to calculate according to speed governing, remove to trigger thyristor (48) by trigger impulse generator (47), the DC loop (50) of sending into saturable reactor behind rectifier (49) is to realize variable voltage control.The AC signal of current transformer CT becomes d. c. voltage signal (51) and (52).Velometer (53) detects the actual speed of motor.(54) produce the velocity setting instruction.(55) be variable connector, (56) are A/D converter.(58) and (59) be respectively auxiliary relay and A.C. contactor.(60) be light-emitting diode, the A.C. contactor that indication was closed at that time.(61) be the electric current of stator winding (4) and (5) and the selection display switch or the button of rotating speed, and shown by charactron (57).(62) be the DIP deploy switch, the requirement of starting torque adjusted, so that steady in the starting process according to load characteristic.(63) just changeing the command switch of stall or counter-rotating or button for motor.
5,, it is characterized in that this motor makes one of them stator winding mechanical rotation phase shift obtain stepless speed regulation with the turbine worm transmission according to claim 1 or 2 described AC speed adjusting brushless wound induction motors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91107140A CN1064376A (en) | 1991-02-11 | 1991-02-11 | Ac speed adjusting brushless wound induction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN91107140A CN1064376A (en) | 1991-02-11 | 1991-02-11 | Ac speed adjusting brushless wound induction motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1064376A true CN1064376A (en) | 1992-09-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN91107140A Pending CN1064376A (en) | 1991-02-11 | 1991-02-11 | Ac speed adjusting brushless wound induction motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1064376A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1134097C (en) * | 1995-12-22 | 2004-01-07 | 株式会社佐竹 | Driving gear and starting operation method of induction motor |
| CN102287269A (en) * | 2011-06-28 | 2011-12-21 | 北京动力机械研究所 | Electric starter for small turbine engine |
| CN111396736A (en) * | 2020-04-17 | 2020-07-10 | 江苏金湖输油泵有限公司 | Axle electric lubrication pump |
| CN114509094A (en) * | 2022-01-05 | 2022-05-17 | 清华大学 | V-belt detection device and generator |
-
1991
- 1991-02-11 CN CN91107140A patent/CN1064376A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1134097C (en) * | 1995-12-22 | 2004-01-07 | 株式会社佐竹 | Driving gear and starting operation method of induction motor |
| CN102287269A (en) * | 2011-06-28 | 2011-12-21 | 北京动力机械研究所 | Electric starter for small turbine engine |
| CN102287269B (en) * | 2011-06-28 | 2014-03-19 | 北京动力机械研究所 | Electric starter for small turbine engine |
| CN111396736A (en) * | 2020-04-17 | 2020-07-10 | 江苏金湖输油泵有限公司 | Axle electric lubrication pump |
| CN114509094A (en) * | 2022-01-05 | 2022-05-17 | 清华大学 | V-belt detection device and generator |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |