A three-phase induction motor that is rotationally driven in response to supply of AC power from an inverter including a switching element formed by using a wide bandgap semiconductor includes: a stator including a stator slot having an open slot structure for inserting a former-wound coil; and a rotor including a rotor slot into which a secondary conductor is inserted, the rotor being disposed inside the stator via a gap. Assuming that the number of rotor slots is N.sub.r, the number of stator slots is N.sub.s, and the number of poles is N.sub.p, N.sub.r, N.sub.s, and N.sub.p are set such that the relationship of N.sub.rN.sub.sN.sub.p6 is satisfied.

A three-phase induction motor that is rotationally driven in response to supply of AC power from an inverter including a switching element formed by using a wide bandgap semiconductor includes: a stator including a stator slot having an open slot structure for inserting a former-wound coil; and a rotor including a rotor slot into which a secondary conductor is inserted, the rotor being disposed inside the stator via a gap. Assuming that the number of rotor slots is N.sub.r, the number of stator slots is N.sub.s, and the number of poles is N.sub.p, N.sub.r, N.sub.s, and N.sub.p are set such that the relationship of N.sub.rN.sub.sN.sub.p6 is satisfied.

An electric motor assembly includes an axle having a first end and a second end. A plurality of rotor stages is attached to the axle. The rotor stages each include a set of rotor magnets. Each set has a greater potential magnetic field as the sets are located further from the first end. A plurality of stators is positioned around the rotor stages so that each of the rotor stages is adjacent to and covered by one of the stators to define a plurality of mated pairs. The stators each include a plurality of stator magnets. A stator control, for controlling individual ones of the pairs, is electrically coupled to each of the stators and magnetizes the stator magnets in a controlled fashion with respect to the rotor magnets to urge the rotor magnets in a same direction and rotate the axle.

The invention relates primarily to a rotating electrical machine for a motor vehicle including: a rotor, anda stator (11) including a winding (17) having a plurality of phases, each phase comprising a plurality of groups of coils (G1-G4), characterized in that said stator (11) is configured such that currents in the groups of coils (G1-G4) are able to flow selectively: in one and the same direction so as to maximize a number of poles of the rotating electrical machine, orin opposite directions so as to minimize a number of poles of the rotating electrical machine.

The vehicle drive system includes: a motor having a stator and a rotor; and a battery. The stator has primary conductors, the rotor has secondary conductors, and the battery has battery modules. A motor ECU and a battery ECU are provided. The motor ECU can change the number of poles of the motor by increasing/reducing the number of primary conductor groups, in each of which a current flows in the same direction and the primary conductors are continuously aligned in a circumferential direction. The battery ECU can change a connection mode of battery module pairs, which are electrically connected to each other, between in series and in parallel. The ECU, the motor ECU, and the battery ECU are configured to initiate changing the number of the poles and changing the connection mode of the battery module pairs at different timings from each other.

The vehicle drive system includes: a motor having a stator and a rotor; and a battery. The stator has primary conductors, the rotor has secondary conductors, and the battery has battery modules. A motor ECU and a battery ECU are provided. The motor ECU can change the number of poles of the motor by increasing/reducing the number of primary conductor groups, in each of which a current flows in the same direction and the primary conductors are continuously aligned in a circumferential direction. The battery ECU can change a connection mode of battery module pairs, which are electrically connected to each other, between in series and in parallel. The ECU, the motor ECU, and the battery ECU are configured to initiate changing the number of the poles and changing the connection mode of the battery module pairs at different timings from each other.

The vehicle drive system includes: a motor having a cylindrical stator and a cylindrical rotor provided in the stator and driving a drive wheel of a vehicle by rotation of the rotor; and a motor ECU controlling the motor. The stator has plural primary conductors, and the rotor has plural secondary conductors in a radially outer portion. The motor is configured to change a number of poles of the stator when the motor ECU increases/reduces a number of primary conductor groups through which the current flows in the same direction and are continuously aligned in a circumferential direction. An ECU and the motor ECU are configured to change the number of the poles of the stator on the basis of at least one of a driving operation by a driver and a travel state of an own vehicle.

The vehicle drive system includes: a motor having a cylindrical stator and a cylindrical rotor provided in the stator and driving a drive wheel of a vehicle by rotation of the rotor; and a motor ECU controlling the motor. The stator has plural primary conductors, and the rotor has plural secondary conductors in a radially outer portion. The motor is configured to change a number of poles of the stator when the motor ECU increases/reduces a number of primary conductor groups through which the current flows in the same direction and are continuously aligned in a circumferential direction. An ECU and the motor ECU are configured to change the number of the poles of the stator on the basis of at least one of a driving operation by a driver and a travel state of an own vehicle.

A controller for a permanent magnet synchronous motor includes an estimating portion configured to determine an estimated value of a rotational speed of the rotor and an estimated value of a position of magnetic poles of the rotor based on a value of the current detected by the current detector and a parameter value indicating an interlinkage magnetic flux caused by the permanent magnet across the winding; a control unit configured to control the drive portion to cause the rotating magnetic field based on the estimated value of the rotational speed and the estimated value of the position of the magnetic poles; and a correction portion configured to correct the parameter value indicating the interlinkage magnetic flux based on correction information, the correction information being determined based on a temperature of the winding and a relationship between the temperature of the winding and a temperature of the permanent magnet.

A controller for a permanent magnet synchronous motor includes an estimating portion configured to determine an estimated value of a rotational speed of the rotor and an estimated value of a position of magnetic poles of the rotor based on a value of the current detected by the current detector and a parameter value indicating an interlinkage magnetic flux caused by the permanent magnet across the winding; a control unit configured to control the drive portion to cause the rotating magnetic field based on the estimated value of the rotational speed and the estimated value of the position of the magnetic poles; and a correction portion configured to correct the parameter value indicating the interlinkage magnetic flux based on correction information, the correction information being determined based on a temperature of the winding and a relationship between the temperature of the winding and a temperature of the permanent magnet.