Provided is a pole-number-changing rotary electric machine having excellent torque-current characteristics both at a more-pole drive time and at a less-pole drive time without use of a winding changing mechanism. The pole-number-changing rotary electric machine is configured to change a number of poles between the more-pole drive time and the less-pole drive time, and includes: a rotary electric machine including: a stator including stator slots arranged in a mechanical angle direction; and a rotor configured to be rotated by magnetomotive forces generated by currents flowing through stator coils stored in the stator slots; an inverter configured to supply an m-phase current to the stator coils; and a control unit configured to control the inverter, the per-stator-slot magnetomotive forces being arranged at regular angle intervals.

Provided is a pole-number-changing rotary electric machine having excellent torque-current characteristics both at a more-pole drive time and at a less-pole drive time without use of a winding changing mechanism. The pole-number-changing rotary electric machine is configured to change a number of poles between the more-pole drive time and the less-pole drive time, and includes: a rotary electric machine including: a stator including stator slots arranged in a mechanical angle direction; and a rotor configured to be rotated by magnetomotive forces generated by currents flowing through stator coils stored in the stator slots; an inverter configured to supply an m-phase current to the stator coils; and a control unit configured to control the inverter, the per-stator-slot magnetomotive forces being arranged at regular angle intervals.

Disclosed is a drive train including a drive shaft, a drive machine, and a planetary gearbox having three drives and three outputs, wherein one output is connected to the drive shaft, one drive is connected to the drive machine, and a second drive is connected to an electric differential drive. The differential drive can be connected directly to a network without a frequency converter, in order that the operation of the drive train is possible without a frequency converter.

Disclosed is a drive train including a drive shaft, a drive machine, and a planetary gearbox having three drives and three outputs, wherein one output is connected to the drive shaft, one drive is connected to the drive machine, and a second drive is connected to an electric differential drive. The differential drive can be connected directly to a network without a frequency converter, in order that the operation of the drive train is possible without a frequency converter.

A method and system of performing a pole switching operation in a multi-phase machine include operating the multi-phase machine in a first configuration with a first number of poles, where the first number of poles is based on a first number of phases in the first configuration and a number of stator slots allocated for each winding in the multi-phase machine. The method and system also include receiving a signal indicating the pole switching operation in the multi-phase machine. In response to receiving the signal, the method and system include operating the multi-phase machine in a second configuration with a second number of poles, where the second number of poles is based on a second number of phases in the second configuration and the number of stator slots allocated for each winding in the multi-phase machine.

A method and system of performing a pole switching operation in a multi-phase machine include operating the multi-phase machine in a first configuration with a first number of poles, where the first number of poles is based on a first number of phases in the first configuration and a number of stator slots allocated for each winding in the multi-phase machine. The method and system also include receiving a signal indicating the pole switching operation in the multi-phase machine. In response to receiving the signal, the method and system include operating the multi-phase machine in a second configuration with a second number of poles, where the second number of poles is based on a second number of phases in the second configuration and the number of stator slots allocated for each winding in the multi-phase machine.

A synchronous motor is driven by three phase alternate current. The rotor core includes a laminated body configured by laminating plate members made of electrical steel sheet. Each plate member is formed in a substantially circular shape in a plan view and formed with projections along an outer circumference thereof. The number of slots of the stator is 3xy when variable x is a natural number and variable y is a positive odd number. The number of poles of the rotor is (3y+1)x or (3y1)x. The number of projections of each plate member is a common measure of (3y+1)x and (3y1)x. The laminated body has a structure in which the plate members are laminated so that the projections are shifted relative to one another.

A synchronous motor is driven by three phase alternate current. The rotor core includes a laminated body configured by laminating plate members made of electrical steel sheet. Each plate member is formed in a substantially circular shape in a plan view and formed with projections along an outer circumference thereof. The number of slots of the stator is 3xy when variable x is a natural number and variable y is a positive odd number. The number of poles of the rotor is (3y+1)x or (3y1)x. The number of projections of each plate member is a common measure of (3y+1)x and (3y1)x. The laminated body has a structure in which the plate members are laminated so that the projections are shifted relative to one another.

Disclosed are a variable power motor and an intelligent controller therefor. The motor includes a rotor, a stator, a housing, stator windings and terminals. The stator windings are formed by embedding the same stator core into multiple series windings. Various series nodes of the stator windings, each serving as a power supply terminal with different power, are respectively led out individually. The various series windings of the stator respectively control, by means of the intelligent controller, the switching on and off of multiple switching switches. The soft-start and soft-stop of the motor can be realized, and a load is automatically tracked to regulate the power of the winding during operation, so as to obtain a power-saving effect.

Disclosed are a variable power motor and an intelligent controller therefor. The motor includes a rotor, a stator, a housing, stator windings and terminals. The stator windings are formed by embedding the same stator core into multiple series windings. Various series nodes of the stator windings, each serving as a power supply terminal with different power, are respectively led out individually. The various series windings of the stator respectively control, by means of the intelligent controller, the switching on and off of multiple switching switches. The soft-start and soft-stop of the motor can be realized, and a load is automatically tracked to regulate the power of the winding during operation, so as to obtain a power-saving effect.