In an alternator for a vehicle according to the present invention, each of rear-side ribs defining each of rear-side exhaust holes includes a projecting portion that has a three-sided sectional shape obtained by cutting along a vertical direction relative to a center axis line of a shaft at least in a portion away from respective end portions of stator coils, and has an apex oriented toward a cooling fan. The apex is oriented in a direction opposite to a rotating direction of the cooling fan. Therefore, the amount of air generated by the cooling fan is increased to improve cooling performance for a stator.

Rotating electrical machine

In a rotor for the dynamo, the interior circumference face of a rotor core main body makes contact in a thermally transmissible manner with a rotor axle, and the rotor axle includes a cooling medium circulation space. The rotor is provided with a cooling medium supply member, which supplies the cooling medium to the cooling medium circulation space. The cooling medium supply member is provided with a cooling medium supply path that extends in the rotor axle direction, and cooling medium supply holes that extend externally in the direction of the rotor diameter. The cooling medium supply holes are provided with supply apertures that open toward the cooling interior circumference face. The rotor axle is provided with cooling medium discharge holes that extend externally in the direction of the rotor diameter. The cooling medium discharge holes are provided with discharge apertures that open externally in the diameter direction.

Rotor for rotating electric machine

A rotary electric machine includes: a stator core fixed to a casing; a coil end formed on the stator core; a bracket fixed to the casing; an arm that extends from the bracket and that is made of metal and that has elasticity; a holder that is attached to the arm and that is made of resin; and a sensor that is attached to the holder and that contacts the coil end to detect temperature of the coil end.

Rotary electric machine

The electric rotating machine has the structure in which, for each one of the slots formed in its stator core, each of the innermost and outermost electrical conductors housed in the slot includes a R-chamfered portion formed in a bent portion thereof projecting outside from the slot and bent along a circumferential direction of the stator core. The R-chamfered portion is located at a radially inner or outer corner of the bent portion at which a side surface of the bent portion on the side being circumferentially bent intersects with a side surface of the bent portion on the radially inner or outer side. The R-chamfered portion is formed of a curved surface having a curvature radius larger than a curvature radius of the other three corners of the bent portion.

Electric rotating machine

An electric rotating machine includes a rotor, a stator in which a coil is so wound as to have an coil end, and a coolant supply pipe. The coolant supply pipe lies with a length thereof extending substantially parallel to an axis of rotation of the rotor and is disposed above the stator in a direction of gravitational force. The coolant supply pipe has a first and a second coolant outlet through which coolant is to be emitted to the coil end. The first and the second coolant outlets are so oriented as to direct streams of the coolant to a first area and a second area of the coil end which are different in location from each other. This enables the coolant to be emitted to almost the whole of the coil end even when the electric rotating machine is titled in a direction in which the rotor turns.

Electric rotating machine with cooling mechanism

A rotating electric machine comprises a stator and a rotor. In the rotor, numerous slots are formed along a circumferential direction. In the each of slots, a first stator coil and a second stator coil are inserted and insulated by an insulator inserted before inserting the coils in the slots. The insulator encircles the first and second stator coils so as to be formed into an S shape. The center portion thereof extends over the area between the first and second stator coils. One end of the insulator is held between one surface of the center portion of the insulator and the first stator coil. Other end of the insulator is held between another surface of the center portion of the insulator and the second stator coil.

Rotating electric machine

An accommodating recess ( 21 A, 21 B) has a magnet accommodating portion ( 19 A, 19 B) for accommodating a permanent magnet ( 17 A, 17 B) and a cavity ( 20 A, 20 B), which is located at the q-axis side of the magnet accommodating portion. The cavity opens through a rotor outer circumferential surface ( 162 ). A starting point (Pa 1, Pb 1 ) of an outer cavity forming surface ( 201 A, 201 B) is located on the rotor outer circumferential surface. The outer cavity forming surface intersects either a magnetic pole surface or an imaginary extended plane ( 23 A, 23 B) of a magnetic pole facing surface ( 191 A, 191 B). The rotor outer circumferential surface ( 162 ) includes portions of an imaginary annular line (E). A starting point (Pa 1, Pb 1 ) of the outer cavity forming surface ( 201 A, 201 B) is located between the d-axis and an intersection point (Qa, Qb) between the imaginary annular line and the imaginary extended plan of the magnetic pole facing surface.

Permanent magnet embedded rotor for rotating electric machine and rotating electric machine

An interior permanent magnet motor includes a rotor and a stator. The rotor includes a rotor core. The rotor core is formed by laminating steel plates each including pairs of magnet insertion holes and pairs of cutouts. Each pair of magnet insertion holes includes two magnet insertion holes that are arranged in a V-shape, the wide end of which is relatively closer to the outer edge with a support portion located in between. Each pair of cutouts is formed at q-axis ends of the corresponding magnet insertion holes, and includes two cutouts connected to the outer edge of the rotor core. In a state where the permanent magnets are inserted in the magnet insertion holes, a gap is formed at a d-axis end of each magnet insertion hole.

Interior permanent magnet motor

A centrifugal compressor for compressing gas has a casing, a rotary shaft, an impeller, a diffuser, a first scroll, a second scroll, a first passage, a second passage, and a switching member. The rotary shaft is supported by the casing. The impeller is rotatably fixed to the rotary shaft, and sends the gas radially outward to a flow path downstream thereof. The diffuser is formed around the impeller. The first scroll is formed around the diffuser. The second scroll is formed between the diffuser and the impeller. The first passage is formed from the impeller to the first scroll through the diffuser. The second passage is formed from the impeller to the second scroll. The switching member switches the flow path between the first passage and the second passage by opening and closing the diffuser.

Centrifugal compressor having switchable two passages

A pump mounting structure is disclosed. The structure includes a mounting surface (Bd1) on a body (Bd) having an insertion recess (51), and at least one mounting member (41 b) having a mounting portion (43) inserted into the insertion recess (51). The mounting portion (43) has an outer surface (43a) and an insertion hole (42) through which a bolt (B) is inserted. A first gap (S1) is formed between the insertion hole (42) and the bolt (B). A second gap (S2) is formed between the outer surface (43a) of the mounting portion (43) and an inner surface (51a) of the insertion recess (51). A seal member (48) is disposed on an open side of the insertion recess (51).

Ryo Umeyama

Papers

Rotating electric machine

Permanent magnet embedded rotor for rotating electric machine and rotating electric machine

Interior permanent magnet motor

Centrifugal compressor having switchable two passages

Pump mounting structure