A rotor for a rotary electric machine includes a rotor core in which a plurality of magnetic pole portions is provided. Each of the magnetic pole portions includes: a magnet insertion hole into which a permanent magnet is inserted. A d-axis-side space portion is provided inside the magnet insertion hole between the d-axis-side end portion of the permanent magnet and the d-axis-side end portion of the magnet insertion hole, and a q-axis-side space portion penetrating in the axial direction is provided inside the magnet insertion hole between the q-axis-side end portion of the permanent magnet and the q-axis-side end portion of the magnet insertion hole. The permanent magnet further includes: a first communication portion communicating the d-axis-side end portion with the q-axis-side end portion; and a second communication portion communicating the d-axis-side end portion with the q-axis-side end portion.

An electric machine (10) includes a housing (12), a stator (20) fixed within the housing (12), a rotor (30) with a rotor shaft (32), an air gap (24) formed between the rotor (30) and the stator (20), and a cooling device (14) configured for liquid cooling of the electric machine (10). The rotor shaft (32) defines an axial bore (36) in an axial direction, which extends at least partially into the rotor (30). The rotor (30) defines a radially extending air duct (40), which extends from an inner side (42) contacting the rotor shaft (30) to an outer side (44) facing the air gap (24). The rotor shaft (32) defines a bore (46), which is aligned with the air duct (40) such that air is flowable out of the rotor shaft (32) into the air gap (24).

A compressor includes a compression mechanism, a motor, a drive shaft, and a motor cooler. The compressor is configured to compress a working fluid. The motor dives the compression mechanism and is housed within a motor housing. The drive shaft is engaged with the motor and the compression mechanism and is configured to drive operation of the compression mechanism. The motor cooler is disposed adjacent the motor and is configured to pump a cooling working fluid around the motor. The motor cooler includes a pump that pumps the cooling working fluid into the motor housing based on a rotational speed of the drive shaft.

A vehicle driving apparatus includes: a rotary shaft having an axial hole that opens in its axial end; a casing storing the rotary shaft; a bearing provided between the casing and the rotary shaft; and a lubrication mechanism for supplying an oil into an opening of the axial hole. The casing is provided with: a recessed portion defined by a wall surface of the casing and located on a side of the axial end of the rotary shaft, such that the axial end of the rotary shaft and the bearing are located in the recessed portion; an oil hole communicating with the recessed portion; and a projecting portion projecting from the wall surface toward the opening and having a distal end located inside the axial hole. The bearing, the wall surface and the projecting portion cooperate to surround a surrounded space that communicates with the opening of the axial hole.

A vehicle driving apparatus includes: a rotary shaft having an axial hole that opens in its axial end; a casing storing the rotary shaft; a bearing provided between the casing and the rotary shaft; and a lubrication mechanism for supplying an oil into an opening of the axial hole. The casing is provided with: a recessed portion defined by a wall surface of the casing and located on a side of the axial end of the rotary shaft, such that the axial end of the rotary shaft and the bearing are located in the recessed portion; an oil hole communicating with the recessed portion; and a projecting portion projecting from the wall surface toward the opening and having a distal end located inside the axial hole. The bearing, the wall surface and the projecting portion cooperate to surround a surrounded space that communicates with the opening of the axial hole.

Aspects of the present invention relate to a rotor end member (20-1, 20-2) for conveying air through a rotor (6) of an electric machine (1). The rotor end member (20-1, 20-2) has at least one air inlet aperture (23-n) for conveyance of air into one or more first rotor aperture (12-n) formed in a radially inner section (RE1) of the rotor (6). The rotor end member (20-1, 20-2) also has at least one air outlet aperture (30-n) for discharging air from one or more second rotor aperture (13A-C) formed in a radially outer section (RE2) of the rotor (6). The present invention also relates to a rotor assembly (3); an electric machine (1); and a vehicle (V).

An electric motor includes: a rotor configured to be rotatable about a rotation axis and to which a fluid drive unit is fixed; a stator that is disposed inward of the rotor and includes claw pole stator units, the claw pole stator units each including a winding that is wound in an annular shape around the rotation axis and an iron core that surrounds the winding; a hole that is provided in one end portion of the rotor so as to penetrate from inside to outside of the rotor, the stator being provided in the inside and the fluid drive unit being fixed to the outside of the rotor; and an inflow path configured to cause a surrounding fluid to flow into inside of a stator unit, the stator unit being provided at one other end portion opposite to the one end portion in an axial direction.

An electric motor includes: a rotor configured to be rotatable about a rotation axis and to which a fluid drive unit is fixed; a stator that is disposed inward of the rotor and includes claw pole stator units, the claw pole stator units each including a winding that is wound in an annular shape around the rotation axis and an iron core that surrounds the winding; a hole that is provided in one end portion of the rotor so as to penetrate from inside to outside of the rotor, the stator being provided in the inside and the fluid drive unit being fixed to the outside of the rotor; and an inflow path configured to cause a surrounding fluid to flow into inside of a stator unit, the stator unit being provided at one other end portion opposite to the one end portion in an axial direction.

In a first aspect, a method for removing an electromagnetic module from an electrical machine is provided. The electrical machine comprises a plurality of electromagnetic modules having an electromagnetic material. The electromagnetic modules comprise base and a support extending from the base and supporting the electromagnetic material. The base comprises a bottom surface and a first side surface. The first side surface comprises an axially extending groove defining a cooling channel with an axially extending groove of a first side surface of an adjacent electromagnetic module. The method comprises inserting a rod in a cooling channel formed by the groove of the electromagnetic module to be removed and a groove of an adjacent electromagnetic module; releasing the electromagnetic module to be removed from a structure of the electrical machine; and sliding the electromagnetic module to be removed along the rod.

Disclosed within are a structure and method for forming a component for a rotor to be used in an electric machine. The formed rotor components can include a rotor assembly or rotor shaft. The rotor assembly can include a plurality of poles spaced about a rotor core. The plurality of poles can include a pole shoe or pole body. Quasi-laminations that can result in a unitary structure that includes support structures can be used to form all or a portion of the pole shoe or pole body.