초록 ▼

A drive system powers a six-phase AC induction motor having a plurality of poles and a stator with a plurality of teeth where the number of teeth divided by six times the number of poles equals an integer number. The stator core has first and second groups of three-phase stator windings. The second

A drive system powers a six-phase AC induction motor having a plurality of poles and a stator with a plurality of teeth where the number of teeth divided by six times the number of poles equals an integer number. The stator core has first and second groups of three-phase stator windings. The second group of three-phase windings is separated spatially by 30 electrical degrees from the first group. A first power supply is connectable to the first group of three-phase windings. A second power supply is connectable to the second group of three-phase windings. The second power supply provides power to the second group of three-phase windings that is shifted by 30 electrical degrees in time with respect to the first power supply. The first and second power supplies receive signals from identical pulse width modulator generators. The respective first and second pulse width modulator generators receive commands from one controller.

대표청구항 ▼

1. A motor drive system comprising: a six phase alternating current induction motor having a plurality of poles (P) and a stator with a core having a plurality of teeth (T) with the number of teeth divided by 6 times the number of poles (T/(6×P)) equaling an integer number, the core having first and

1. A motor drive system comprising: a six phase alternating current induction motor having a plurality of poles (P) and a stator with a core having a plurality of teeth (T) with the number of teeth divided by 6 times the number of poles (T/(6×P)) equaling an integer number, the core having first and second groups of three-phase stator windings wound thereon in a short pitch winding pattern, the first group of three-phase windings separated spatially by 30 electrical degrees from the second group of three-phase windings;a first power supply connected to the first group of three-phase windings;a second power supply connected to the second group of three-phase windings;wherein the second power supply provides power to the second group of three-phase windings that is shifted by 30 electrical degrees in time with respect to the power provided by the first power supply;wherein the first and second power supplies receive signals from respective identical pulse width modulator generators; andwherein the respective first and second pulse width modulator generators receive angle and voltage commands from one controller. 2. The motor drive system of claim 1, wherein the controller operates based upon a closed loop control scheme. 3. The motor drive system of claim 1, wherein the controller operates based upon an open loop control scheme. 4. The motor drive system of claim 1, wherein the angle commands are based upon a speed reference. 5. The motor drive system of claim 1, wherein the angle commands are based upon a torque reference. 6. The motor drive system of claim 1, wherein the controller receiving current feedback. 7. The motor drive system of claim 1, wherein the number of poles is 4. 8. The motor drive system of claim 7, wherein the stator comprises 48 slots. 9. The motor drive system of claim 8, wherein the first and second groups of windings are wound on the core with an 11 stator tooth pitch winding pattern. 10. The motor drive system of claim 7, wherein the stator comprises 72 slots. 11. The motor drive system of claim 10, wherein the first and second groups of windings are wound on the core with a 16 stator tooth pitch winding pattern. 12. The motor drive system of claim 10, wherein the first and second groups of windings are wound on the core with a 17 stator tooth pitch winding pattern. 13. A method of controlling a six phase alternating current induction motor having a plurality of poles (P) and a stator with a core having a plurality of teeth (T) with the number of teeth divided by six times the number of poles (T/(6×P)) equaling an integer number, the core having first and second groups of three-phase stator windings wound thereon in a short pitch winding pattern, the first group of three-phase windings is separated spatially by 30 electrical degrees from the second group of three-phase windings; applying a power from a first power supply to the first group of three-phase windings;applying power from a second power supply to the second group of three-phase windings;shifting by 30 electrical degrees in time the power applied from the second power supply to the second group of three-phase windings with respect to the power applied to the first group of three-phase winding by the first power supply;configuring the first and second power supplies to receive signals from respective identical pulse width modulator generators; andconfiguring the respective first and second pulse width modulator generators to receive angle and voltage commands from one controller. 14. The method of claim 13, wherein the step of configuring the respective first and second pulse width modulator generators to receive angle and voltage commands from one controller includes configuring the controller to operate based upon a closed loop control scheme. 15. The method of claim 13, wherein the step of configuring the respective first and second pulse width modulator generators to receive angle and voltage commands from one controller includes configuring the controller to operate based upon an open loop control scheme. 16. The method of claim 13, wherein the step of configuring the respective first and second pulse width modulator generators to receive angle and voltage commands from one controller includes configuring the angle commands based upon a speed reference. 17. The method of claim 13, wherein the step of configuring the respective first and second pulse width modulator generators to receive angle and voltage commands from one controller includes configuring the angle commands based upon a torque reference. 18. The method of claim 13, wherein the step of configuring the respective first and second pulse width modulator generators to receive angle and voltage commands from one controller includes configuring the controller to receive current feedback. 19. The method of claim 13, wherein the number of poles is 4. 20. The method of claim 19, wherein the stator comprises 48 slots. 21. The method of claim 20, wherein the first and second groups of windings are wound on the core with an 11 stator tooth pitch winding pattern. 22. The method of claim 19, wherein the stator comprises 72 slots. 23. The method of claim 22, wherein the first and second groups of windings are wound on the core with a 16 stator tooth pitch winding pattern. 24. The method of claim 22, wherein the first and second groups of windings are wound on the core with a 17 stator tooth pitch winding pattern. 25. A drive system adapted to be coupled to a motor, wherein the motor comprises a six phase alternating current induction motor having a plurality of poles (P), a stator with a core having a plurality of teeth (T) with the number of teeth divided by 6 times the number of poles (T/(6×P)) equaling an integer number, the core having first and second groups of three-phase stator windings wound thereon in a short pitch winding pattern, the second group of three-phase windings is separated spatially by 30 electrical degrees from the first group of three-phase windings, the drive system comprises: a first power supply configured to be connected to the first group of three-phase windings;a second power supply configured to be connected to the second group of three-phase windings;wherein the second power supply provides power to the second group of three-phase windings that is shifted by 30 electrical degrees in time with respect to the power provided by the first power supply;wherein the first and second power supplies receive signals from respective identical pulse width modulator generators; andwherein the respective first and second pulse width modulator generators receive angle and voltage commands from one controller. 26. The drive system of claim 25, wherein the controller operates based upon a closed loop control scheme. 27. The drive system of claim 25, wherein the controller operates based upon an open loop control scheme. 28. The drive system of claim 25, wherein the angle commands are based upon a speed reference. 29. The drive system of claim 25, wherein the angle commands are based upon a torque reference. 30. The drive system of claim 25, wherein the controller receiving current feedback. 31. The drive system of claim 25, wherein the number of poles is 4.