An induction motor with on-rotor slip power recovery may have a rotor and a stator element. The rotor element has a rotor winding system with a number of winding units wound-distributed for inducing a rotor magnetic field. Each winding unit has an induction and an augmentation subwinding. The induction subwinding has two legs of each a number of induction conductor segments. The induction subwinding induces an emf that drives a rotor current in the rotor winding system to generate a basic induction component for the rotor magnetic field when the induction conductor segments move in the stator element. The augmentation subwinding has two legs of each a number of augmentation conductor segments aligned parallel to the induction conductor segments. The augmentation subwinding being wound that the two legs of augmentation conductor segments are immediately next to each other and positioned mid-way between the two legs of induction conductor segments.

A motor control method comprises providing a machine comprising a plurality of windings, a rotor and a stator magnetically coupled to the rotor, coupling a plurality of power converters to the plurality of windings, configuring the plurality of power converters so as to adjust the number of poles of the machine in a low-stress operating mode according to a plurality of operating parameters and after a fault occurs in the machine, configuring the plurality of power converters such that the machine enters a fault tolerant operating mode.

A motor control method comprises providing a machine comprising a plurality of windings, a rotor and a stator magnetically coupled to the rotor, coupling a plurality of power converters to the plurality of windings, configuring the plurality of power converters so as to adjust the number of poles of the machine in a low-stress operating mode according to a plurality of operating parameters and after a fault occurs in the machine, configuring the plurality of power converters such that the machine enters a fault tolerant operating mode.

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.

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.

A solid-state electromagnetic rotor, including a plurality of salient pole pieces arranged around a supporting structure, wherein a first end of each salient pole piece is attached to the support structure and a second end of each salient pole piece points outward away from the sup-porting structure. The wires wound around each salient pole piece, wherein when the wires of the plurality of salient pole pieces are sequentially excited by an excitation circuit. The salient pole pieces are energized to provide a moving polar magnetic field in the form of distinct magnetic poles as desired to accomplish power generation.

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.