An electric motor includes an armature and a mover. The armature includes an armature coil. The mover includes a plurality of pole blocks each including an iron core disposed to face the armature and a plurality of permanent magnets which surround the iron core such that a surface of the iron core, which faces the armature, is open. The plurality of permanent magnets in each pole block are disposed such that magnetic poles thereof facing the iron core are equal in polarity.

A shift range control device switches a shift range by controlling drive of a motor. An angle calculation unit calculates a motor angle based on a signal from a rotation angle sensor that detects a rotation position of the motor. A drive control unit drives the motor so that the motor angle becomes a target angle according to the target shift range, and stops a rotor by a fixed phase energization, when the motor angle reaches a target angle. When the rotor vibrates with respect to stop position, the drive control unit maintains a state in which a brake torque, which is the torque generated when moving away from center of vibration, is larger than an acceleration torque, which is the torque generated when moving toward the center of vibration, and reduces the current that energizes the motor based on a difference between the brake torque and the acceleration torque.

A shift range control device switches a shift range by controlling drive of a motor. An angle calculation unit calculates a motor angle based on a signal from a rotation angle sensor that detects a rotation position of the motor. A drive control unit drives the motor so that the motor angle becomes a target angle according to the target shift range, and stops a rotor by a fixed phase energization, when the motor angle reaches a target angle. When the rotor vibrates with respect to stop position, the drive control unit maintains a state in which a brake torque, which is the torque generated when moving away from center of vibration, is larger than an acceleration torque, which is the torque generated when moving toward the center of vibration, and reduces the current that energizes the motor based on a difference between the brake torque and the acceleration torque.

A shift range control device switches a shift range by controlling drive of a motor. An angle calculation unit calculates a motor angle based on a signal from a rotation angle sensor that detects a rotation position of the motor. A drive control unit drives the motor so that the motor angle becomes a target angle according to the target shift range, and stops a rotor by a fixed phase energization, when the motor angle reaches a target angle. When the rotor vibrates with respect to stop position, the drive control unit maintains a state in which a brake torque, which is the torque generated when moving away from center of vibration, is larger than an acceleration torque, which is the torque generated when moving toward the center of vibration, and reduces the current that energizes the motor based on a difference between the brake torque and the acceleration torque.

An electric motor having low vibration and/or noise comprises a rotor or stator comprising permanent magnets each comprising at least two pole pairs, with an internal flux gap within the permanent magnets between adjacent internal pole pairs. The internal flux gap between the internal pole pairs may be similar to an external pole to pole physical spacing between adjacent poles of adjacent magnets. The motor is suitable for use in for example a laundry washing machine or dryer or washer-dryer.

An electric motor having low vibration and/or noise comprises a rotor or stator comprising permanent magnets each comprising at least two pole pairs, with an internal flux gap within the permanent magnets between adjacent internal pole pairs. The internal flux gap between the internal pole pairs may be similar to an external pole to pole physical spacing between adjacent poles of adjacent magnets. The motor is suitable for use in for example a laundry washing machine or dryer or washer-dryer.

A rotor includes an assembly hub intended to be fixed to a shaft, a plurality of permanent magnets which are supported by the assembly hub, and a binding band holding the plurality of permanent magnets in place. The binding band includes crossed windings of reinforcing fibers arranged around the plurality of permanent magnets. Preferably, the rotor further includes a retaining sleeve formed of a unidirectional winding of a reinforcing fiber arranged around the binding band.

A rotor (1) for an electric machine (16) which has at least two poles and an even number of N≥6 stacked rotor modules (2a-2f), wherein the rotor modules (2a-2f) for each pole have a magnet component (3a-3f; 3a-3h), and magnet components (3a-3f; 3a-3h) which embody the same pole form a corresponding magnet component arrangement (4a, 4b, 4f), wherein the first to Nth rotor module (2a-2f) are arranged in ascending sequence of their designation in the axial direction, wherein each magnet component (3a-3f; 3a-3h), belonging to one of the magnet component arrangements (4a), of the first to Nth rotor module (2a-2f) is arranged in each case at a stagger angle α.sub.1 . . . α.sub.N in the circumferential direction, wherein the stagger angles α.sub.i for 1≤i≤N/2 have a value α.sub.i=α.sub.0+k.Math.β where 0≤k≤[(N/2)−1], α.sub.0 is a fixed angular position in the circumferential direction, β is a fixed offset angle, and all the stagger angles α.sub.i are different from one another, wherein the stagger angles α.sub.m for [(N/2)+1]≤m≤N have a value α.sub.m=α.sub.N−m+1, characterized in that,
the stagger angle α.sub.i of at least two of the magnet components (3b) belonging to the magnet component arrangement (4a) is unequal to α.sub.0+(i−1).Math.β,

A rotating electrical machine armature winding includes conductor portions arranged circumferentially away from each other and face a magnet unit. The conductor portions have no inter-conductor members circumferentially disposed therebetween. Each conductor portion includes wire segments of the conductor wire member arranged in circumferentially and radially arranged rows. The conductor portions include a first conductor portion and a second conductor portion which are arranged adjacent to each other in the circumferential direction as a pair and belong to the same phase. The first conductor portion includes the wire segments of the conductor wire member which are arranged asymmetrically with those of the second conductor portion in the circumferential direction. The magnet unit includes magnet which have major magnetic pole faces. Each of the major magnetic pole faces is shaped to have a major magnetic pole angle is selected to be less than or equal to an inter-conductor angle.

A rotating electrical machine armature winding includes conductor portions arranged circumferentially away from each other and face a magnet unit. The conductor portions have no inter-conductor members circumferentially disposed therebetween. Each conductor portion includes wire segments of the conductor wire member arranged in circumferentially and radially arranged rows. The conductor portions include a first conductor portion and a second conductor portion which are arranged adjacent to each other in the circumferential direction as a pair and belong to the same phase. The first conductor portion includes the wire segments of the conductor wire member which are arranged asymmetrically with those of the second conductor portion in the circumferential direction. The magnet unit includes magnet which have major magnetic pole faces. Each of the major magnetic pole faces is shaped to have a major magnetic pole angle is selected to be less than or equal to an inter-conductor angle.