Kramer Barske Schmidtchen Patentanwälte PartG mbB

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).

Provided is a single-blade drill for printed wiring boards that can minimize a remaining whisker burr even when wear remains at a corner of a cutting edge. This single-flute drill for printed wiring boards is configured such that between a first position (P1), which is a position in a margin part (9) that is farthest toward the tip-end side of the drill body (1) and that does not include a flank (10) on a first land part (7) side or a flank (10') on a second land part (8) side, and a second position (P2), which is a position in the margin part (9) that is 0.25 mm toward a drill-body-tip-end side from a drill-body-base-end-side end of the margin part (9), an angle (θ), which is formed by a line connecting a first leading edge (X) and a drill rotation center axis (O) and a line connecting a second leading edge (Y) and the drill rotation center axis (O) on a plane cross section perpendicular to the drill rotation center axis (O), gradually increases from the first position (P1) toward the second position (P2).

A rotating electrical machine includes: a housing including a fixing portion (60) including a threaded hole (61) and a fixing-portion-side refrigerant passage (62); and a stator (1) fixed to the fixing portion (60) and including a stator core (100) in which a bolt insertion hole (14, 24, 34) is formed, and a bolt (50) configured to fix a contact portion (37) including an opening of the bolt insertion hole (14, 24, 34) in surface contact with the fixing portion (60) by being inserted into the bolt insertion hole (14, 24, 34) to insert its distal end into the threaded hole (61), wherein a supply port corresponding to an opening of the fixing-portion-side refrigerant passage (62) is formed in the contact portion (37) within a distribution range of a surface pressure, and a stator-side refrigerant passage (36) axially extending from the supply port is formed in the stator core (100).

A heat absorbing plate (A) includes: a plate surface (10a) in contact with a first bottom surface (1a) of a first electronic component (1) and a second bottom surface (2a) of a second electronic component (2) that generates a relatively smaller amount of heat than the first electronic component (1); and a flow path (P) formed inside the heat absorbing plate (A) to flow therethrough a heat absorbing liquid (F) that absorbs heat generated by the first and second electronic components (1, 2), the flow path (P) including: a first flow path portion (P1); and a second flow path portion (P2) relatively smaller in a height and a cross-sectional area than the first flow path portion (P1). The heat absorbing liquid (F) exchanges heat with the first electronic component (1) in the first flow path portion (P1) and the second electronic component (2) in the second flow path portion (P2).

A characteristic configuration of a power supply module according to the present disclosure includes a power supply module (1) mounted on a vehicle, the power supply module (1) including an AC-DC conversion unit (11) that converts one of an AC voltage and a DC voltage into the other and outputs the other, and a voltage conversion unit (20) that converts a first voltage value of an input DC voltage into a DC voltage having a second voltage value, the voltage conversion unit (20) includes a first conversion unit (21) connected to the AC-DC conversion unit (11) and a second conversion unit (23) connected to the first conversion unit (21) via a transformer (22), and the power supply module (1) including a first board (81) on which the AC-DC conversion unit (11) and the first conversion unit (21) are provided, and a second board (82) on which the second conversion unit (23) is provided and that is different from the first board (81).