Kramer Barske Schmidtchen Patentanwälte PartG mbB

A rotor (20) includes: a plurality of first and second bonded magnets (MG1) and (MG2); and a rotor core (22), wherein the first bonded magnet (MG1) has a first long side (LS1) and a first width, the second bonded magnet (MG2) has a second long side (LS2) and a second width, the rotor core (22) includes: a pair of first hole portions (41); and a pair of second hole portions (42), the first hole portion (41) includes: a first disposing hole portion (41A); and a first air gap portion (41B), the second hole portion (42) includes: a second disposing hole portion (42A); and a second air gap portion (42B), a smallest width (H1) of a first bridge (B1) is 10% or less of the first long side (LS1), and a smallest width (H2) of a second bridge (B2) is 30% or less of the second long side (LS2).

A rotor (20) of a rotary electric machine (1) includes a rotor shaft (21) serving as a rotation axis, an annular rotor core (22) having a first hole (22A) at a center in which the rotor shaft is disposed, and a magnet (MG) disposed in a circumferential direction of the rotor core and provided for each magnetic pole. The rotor core includes a plurality of second holes (22B) provided in the circumferential direction and in which the magnet is disposed, and a plurality of third holes (22C) provided in the circumferential direction and located radially inward with respect to the second holes. The third hole includes an outer sidewall portion (OW), an inner sidewall portion (IW) located radially inward with respect to the outer sidewall portion, and a pair of sidewall portions (SW) provided on both sides of the outer sidewall portion and the inner sidewall portion and connecting the outer sidewall portion and the inner sidewall portion. The inner sidewall portion has a distance changing portion (IW1) whose distance from a rotation center of the rotation axis changes. The inner sidewall portion does not protrude radially inward.

Rectifying elements (D1 to D4) are arranged in such a way as to be less likely to be affected by centrifugal force in a contactless wound-field rotor. Disclosed is the contactless wound-field rotor including a rotor shaft (318), a rotor core (312) around which a coil wire is wound, and a power receiving device (70) receiving power supply in a contactless manner from a power supply device on a non-rotating side, in which the power receiving device (70) includes a plurality of rectifying elements (D1 to D4) arranged in an axial direction in such a way as to extend through a rotation axis (I) of a rotor (310), and a wiring member (91 to 94) electrically connecting the power supply device and the coil wire through the rectifying element (D1 to D4).

A stator (100) includes: a stator core (10) having a ring shape and including a plurality of teeth (40) arranged in a circumferential direction and a plurality of slots (41) each of which is formed between the teeth (40) in the circumferential direction and opened radially inward; and a sealing member (30, 300, 310, 311, 312) that closes an opening (41b, 410b, 411b) on a radially inner side of the slot (41) and has a radial thickness at a center in the circumferential direction thinner than that at an end portion in the circumferential direction. The space (41b2) inside the slot (41) existing radially outside the sealing member (30, 300, 310, 311, 312) is a refrigerant flow path.

A rotary electric machine rotor (R) includes a rotor core (Rc) including a stack of a plurality of core sheets (1) each having a shaft hole (2) at a center; a shaft (6) inserted through the shaft holes (2); and an adapter (10) disposed between the shaft (6) and the rotor core (Rc) and engaged with both the shaft (6) and the rotor core (Rc). In the rotor (R), the plurality of core sheets (1) stacked have, on an inner peripheral surface of the core sheets (1), an engagement portion (C) extending from one end side to the other end side in an axial direction of the shaft (6); the adapter (10) has, on an outer peripheral surface of the adapter (10), a guide portion (11) extending from one end side to the other end side in the axial direction of the shaft (6); one of the engagement portion (C) and the guide portion (11) is an engagement recessed portion (11a) recessed along a radial direction of the shaft (6), and the other is an engagement protruding portion (3) protruding along the radial direction of the shaft (6) and engaged with the engagement recessed portion (11a); the engagement recessed portion (11a) and the engagement protruding portion (3) have a shape twisted at a predetermined twist angle (θ) along a circumferential direction of the shaft (6), and the adapter (10) is engaged with the shaft (6) detachably from the shaft (6) along the axial direction of the shaft (6).

A power conversion unit (100) performing power conversion for a vehicle drive device (TA) including a rotary electrical machine (M) being a drive source of a vehicle (V) includes: a power conversion circuit (1) including at least one of an inverter circuit (11) performing conversion between DC power and AC power between the rotary electrical machine (M) and an in-vehicle power storage device (B), a DC voltage conversion circuit (12) performing voltage conversion of DC power of the in-vehicle power storage device (B), and a charging circuit (13) supplying power of an external power supply (PS) to the in-vehicle power storage device (B) to charge the in-vehicle power storage device (B); a cooling device (2) cooling the power conversion circuit (1); and a case (3) accommodating the power conversion circuit (1) and the cooling device (2). A driving support arithmetic processing device (4) performing arithmetic processing for supporting driving of the vehicle (V) is disposed in the case (3). The driving support arithmetic processing device (4) is cooled by the cooling device (2).

Provided is a rotary valve that can secure sealing performance even when various types of materials are used for a seal. A rotary valve (2) includes: a housing (10) including a valve accommodation unit (11); a rotor (12) being housed rotatably about an axis (X) in the valve accommodation unit (11); and a sealing object (S) being disposed between an inner wall surface of the valve accommodation unit (11) and an outer wall surface of the rotor (12). A plurality of first flow path openings (11a) are formed in the inner wall surface and a plurality of second flow path openings (12c) that can communicate with the first flow path openings (11a) are formed in the outer wall surface (12s). In the sealing object (S), a first seal (21) is overlaid on a second seal (22), the first seal (21) including first seal openings (21a) that communicate with a plurality of the first flow path openings (11a) and being in contact with the inner wall surface, the second seal (22) including second seal openings that overlap with a plurality of the first seal openings (21a) and being in contact with the outer wall surface of the rotor (12), and the second seal (22) is divided into a plurality of pieces in a circumferential direction about the axis (X) and each of the pieces is supported unmovably with respect to the inner wall surface.

Provided is a cooling plate (A) for cooling an electronic component (8) to be cooled by a cooling liquid (F) flowing through a cooling flow path (P). The cooling plate includes: a plate member (10, 11) having a plate surface (10b, 15a) with which the electronic component comes into contact. The cooling flow path is formed in the plate member. The cooling flow path includes a first cooling flow path portion (21), a second cooling flow path portion (S) located downward further than the first cooling flow path portion in a gravity direction and downstream in a flow direction of the cooling liquid, and a supply flow path portion (23) inclined downward to connect the first cooling flow path portion and the second cooling flow path portion. A plurality of fins (16) formed on the plate member are housed in the second cooling flow path portion. The electronic component comes into contact with a portion of the plate surface that is close to the second cooling flow path portion.

A stator (1) includes an annular stator core (10) including a plurality of teeth (11) arranged in a circumferential direction and a plurality of slots (12) formed between the teeth (11) in the circumferential direction, a coil (20) arranged in a slot (12), and an end cover (30) attached to an axial end of the stator core (10), in which the coil (20) is fixed to the end cover (30), and a refrigerant path (12a) that is a flow path of a refrigerant is formed between the coil (20) and the slot (12).

Provided is a technique for reducing a possibility of uneven flow rates of a refrigerant. A stator core (100) is an annular stator core and includes: a first core (10) including first circumferential refrigerant paths (11) that are formed in a circumferential direction at a plurality of positions at a distance from one another and serve as flow paths for a refrigerant extending in the circumferential direction; a second core (20) including second circumferential refrigerant paths (21) that are formed in the circumferential direction at a plurality of positions at a distance from one another and serve as flow paths for the refrigerant extending in the circumferential direction; and a third core (30) in which a plurality of axial refrigerant paths (31) serving as flow paths for the refrigerant that extend in the axial direction and open at ends in the axial direction are formed. The first core (10) and the second core (20) are adjacent in the axial direction, each of two ends in the circumferential direction of the first circumferential refrigerant path (11) is connected to a different one of the two second circumferential refrigerant paths (21), and a plurality of the axial refrigerant paths (31) are connected to at least one of the first circumferential refrigerant paths (11) or one of the second circumferential refrigerant paths (21).