A magnetic pole piece device for a magnetic gear is provided with: an outer circumferential cover member and an inner circumferential cover member coaxially disposed on an outer side and an inner side in a radial direction, respectively; a magnetic pole piece holder defined by wall members between the outer circumferential cover member and the inner circumferential cover member; and a magnetic pole piece held by the magnetic pole piece holder. The inner ring member, the outer ring member, and the wall members are integrally configured.

An outer rotor type motor includes a rotating unit and a fixing unit. The rotating unit includes an inner surrounding wall surrounding a stationary shaft of the fixing unit and an outer surrounding wall surrounding the inner surrounding wall. A spool support is connected to the stationary shaft. Spools are connected to the spool support, surround the stationary shaft and are wound by windings. Outer magnetic members are disposed on the outer surrounding wall. Inner magnetic members are disposed on the inner surrounding wall. When the windings are energized, the inner and outer magnetic members are rotated about the stationary shaft so that the rotating unit is rotated relative to the fixing unit.

An electric motor includes a case, a stator having stator windings, a rotor having a rotor shaft, and at least one main rotor bearing coupling the rotor shaft to the case. Common mode charge builds up on the rotor due to imbalances of the stator. The at least one main rotor bearing has a first electrical resistance between the rotor shaft and the case. The electric motor further includes a rotor discharge bearing coupling the rotor shaft to the case. The rotor discharge bearing has a second electrical resistance between the rotor shaft and the case that is less than the first electrical resistance, causing the common mode charge to discharge through the rotor discharge bearing. In a differing embodiment, a rotor discharge brush coupled between the case and the rotor shaft along the longitudinal axis of the rotor shaft discharges the common mode charge.

A direct driving apparatus for a washing machine according to the present invention, capable of deceleration driving, includes a tub, a stator assembly coupled to the tub and a rotor assembly positioned outside the stator assembly, wherein the apparatus further includes a deceleration coupling unit positioned in a central space of the stator assembly.

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.

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 magnet spacer and a motor. The magnet spacer includes: a first engagement portion being configured to extend along a first axis; and a second engagement portion being configured to extend along a second axis and configured to be integrally formed with the first engagement portion; wherein a predetermined angle is formed between the first axis and the second axis; wherein the shape of the first engagement portion is configured to match the shape of a recess in a motor rotor; and wherein the side shape of the second engagement portion is configured to match the side shape of a motor magnet.

An electric motor includes a case, a stator that includes end-windings, a rotor coupled to the case via at least one rotor bearing, at least one drive motor fluid pump, and drive motor electronics. The rotor includes a hollow cylindrical body, a first shaft portion, and a second shaft portion, a fluid feed tube having a fluid receive end and a fluid feed end, the fluid feed end extending into the hollow cylindrical body, and a plurality of fluid exit ports. The drive motor electronics power the stator with or without causing rotation of the rotor. The drive motor fluid pump pumps fluid into the hollow cylindrical body via the fluid feed tube, pumps the fluid out of the plurality of fluid ports, and onto the stator end-windings to collect heat from the rotor and the stator. The heated fluid may be used for heating a battery.

A magnet spacer and a motor. The magnet spacer includes: a first engagement portion being configured to extend along a first axis; and a second engagement portion being configured to extend along a second axis and configured to be integrally formed with the first engagement portion; wherein a predetermined angle is formed between the first axis and the second axis; wherein the shape of the first engagement portion is configured to match the shape of a recess in a motor rotor; and wherein the side shape of the second engagement portion is configured to match the side shape of a motor magnet.

A magnet spacer and a motor. The magnet spacer includes: a first engagement portion being configured to extend along a first axis; and a second engagement portion being configured to extend along a second axis and configured to be integrally formed with the first engagement portion; wherein a predetermined angle is formed between the first axis and the second axis; wherein the shape of the first engagement portion is configured to match the shape of a recess in a motor rotor; and wherein the side shape of the second engagement portion is configured to match the side shape of a motor magnet.