Kabushiki Kaisha Toyota Jidoshokki

Taizo Hirano

Tatsuya Horiba

Minoru Mera

Shinichi Okuyama

Hiroshi Fukasaku

Taku Adaniya

Kensuke Ikai

Tomoaki Miyata

A stator for a rotating electrical machine includes a stator core, two insulators, and conductive wires forming coils. At least one of the insulators includes guide grooves and through-grooves. The through-grooves include at least two first grooves each of which divides at least two of the guide grooves. Each of the first grooves has a recess that is recessed in the circumferential direction with respect to the rest of the first groove at a portion that divides one of the at least two guide grooves divided by the first groove. The conductive wires extending through the corresponding through-grooves and outward in the radial direction of the insulator base are guided in the circumferential direction by the corresponding guide grooves. The conductive wires extend through the recesses in the corresponding first grooves.

Stator for rotating electrical machine and rotating electrical machine

An overlapping portion of an insulating portion formed in an annular shape is held between a workbench having a linear projection and an ultrasonic horn having a circular projection with at least part of the linear projection and of the circular projection opposed to each other and ultrasonically welded. In the ultrasonic welding, even though the ultrasonic horn under ultrasonic vibration rotates on the overlapping portion of the insulating portion, the area in the overlapping portion held between the linear projection and the circular projection with at least part of the linear projection and of the circular projection opposed to each other is not reduced after ultrasonic vibration is applied to the ultrasonic horn.

Method for manufacturing interphase insulating sheet of rotating electric machine, and electric compressor

Annular portions of a first interphase insulting sheet have void portions. After a U-phase coil is inserted in wave winding, bridge portions are mounted to slots for an adjacent V-phase coil. The void portions are formed at positions corresponding to the bridge portions that are disposed between any two of coil ends. The annular portions are stretched to form a generally pentagon shape, which facilitates mounting of the V-phase coil. The void portions formed at positions that do not need insulation will not impair the insulating function of the first interphase insulating sheet. The void portions formed in alignment with extension of the bridge portions will not cause a drop in the strength of the annular portions.

Interphase insulating sheets with voids at annular portions for rotating electric machine, rotating electric machine, and electric compressor for vehicle

An electric compressor is disclosed in which gas in a motor housing of a rotating electric machine is drawn into a compression chamber and then discharged by the rotating electric machine. The rotating electric machine includes a stator, teeth, coils of different phases, and phase-to-phase insulation sheets provided between coils of different phases. An inlet port is provided in the motor housing. The inlet port draws gas from the outside of the motor housing. An inflow direction of the gas flowing through the inlet port intersects a coil end of one of the coils. A part of the phase-to-phase insulation sheet faces the inlet port and covers an intersection surface of the coil end that intersects the inflow direction.

Electric compressor

Outer circumference of a rotor is alternately provided with a plurality of circumferential portions and a plurality of convex portions. Straight lines each connecting a rotational axis to one of circumferential centers of circumferential portions are referred to as radial lines. Straight lines each bisecting one of convex portions are referred to as bisectors. A plurality of magnetic flux blocking regions are located on a rotor. One of the magnetic flux blocking region is located in a range between the radial line and the bisector adjacent to and preceding the radial line in the rotation direction. Therefore, a permanent magnet embedment rotating electric machine is capable of preventing decreases in torque and suppressing torque ripple.

Growing community of inventors

Kariya, Japan

Taizo Hirano