Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: A motor-driven compressor includes an electric motor, a compression unit, a lead wire, a connection terminal, a cluster block, a housing, a motor drive circuit, a conductive terminal, and a coupling member. The lead wire is extended from a coil end of the stator. The connection terminal is electrically connected to the lead wire. The cluster block accommodates the connection terminal. The conductive terminal electrically connects the connection terminal and the motor drive circuit. The coupling member is arranged between the stator and the cluster block. The cluster block is coupled to the stator by the coupling member. The coupling member is configured to change an coupling position of the cluster block relative to the stator so that the connection terminal faces the conductive terminal.

Abstract: 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.

Abstract: 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.

Abstract: An electric motor includes a rotary shaft, a rotor fixed on the rotary shaft, and a stator having plural slots in which coils of different phases are wound. Each of the coils has at least one pair of end wires. At least in the coil located closest to the rotor, one of the end wires located farther from the rotor than the other of the end wires is used as a lead wire that is to be electrically connected to a driver circuit for energizing the coils.

Abstract: An interphase insulating sheet for a rotating electric machine includes a pair of insulating portions and a plurality of bridge pieces. The insulating portions perform interphase insulation between coil ends of coils protruding from both ends of a stator core. Each insulating portion has bridge bases. The bridge pieces are each inserted in one of slots. Each bridge piece extends from a bridge base of one of the insulating portions to a bridge base of the other insulating portion. Each insulating portion has an annular shape having stacked parts that include a bridge base and overlap with each other by a predetermined margin. In the circumferential direction of each insulating portion, the dimension of the stacked parts is set to be less than or equal to the dimension of the bridge pieces.

Abstract: A motor-driven compressor includes an electric motor, a compression unit, a lead wire, a connection terminal, a cluster block, a housing, a motor drive circuit, a conductive terminal, and a coupling member. The lead wire is extended from a coil end of the stator. The connection terminal is electrically connected to the lead wire. The cluster block accommodates the connection terminal. The conductive terminal electrically connects the connection terminal and the motor drive circuit. The coupling member is arranged between the stator and the cluster block. The cluster block is coupled to the stator by the coupling member. The coupling member is configured to change an coupling position of the cluster block relative to the stator so that the connection terminal faces the conductive terminal.

Abstract: 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.

Abstract: A motor of motor-driven compressor includes a plurality of phase coils, and a plurality of phase wires are drawn from each of the phase coils. The phase wires are bundled and form a phase wire bundle. The tip portions of the phase wires are connected electrically by a conductive ring caulked by heating. A wire joint is formed so as to connect electrically each phase wire at the tip portion of the phase wire bundle. A storage chamber is formed so as to penetrate a cluster block. The wire joint is inserted in the storage chamber. The insertion opening is closed by a cylindrical member made of rubber.

Abstract: A securing means for an insulating member that is advantageous in improving the efficiency of assembly of a motor-driven compressor is provided. Phase wires extending from an end face of a stator core, which is closer to a compression mechanism, are bound to form a phase wire bundle. The distal ends of the phase wires are electrically connected together, so that a wire connecting portion is formed at the distal end of the phase wire bundle. The wire connecting portion, which serves as a neutral point, is coated with an insulating tube made of insulating plastic. The distal end of the insulating tube is sealed. A receiving hole is formed in the cluster block. The insulating tube is fitted in the receiving hole and secured to the cluster block by contacting an inner surface of the receiving hole.

Abstract: An electric motor includes a rotary shaft, a rotor fixed on the rotary shaft, and a stator having plural slots in which coils of different phases are wound. Each of the coils has at least one pair of end wires. At least in the coil located closest to the rotor, one of the end wires located farther from the rotor than the other of the end wires is used as a lead wire that is to be electrically connected to a driver circuit for energizing the coils.

Abstract: A cluster block is arranged on an outer peripheral surface of a stator core. A lead wire is continuous with a U-phase coil, which extends from a coil end of the stator core, and is then connected to a U-phase connector. A lead wire is continuous with a V-phase coil, which extends from the coil end, and is then connected to a V-phase connector. A lead wire is continuous with a W-phase coil, which extends from the coil end, and is then connected to a W-phase connector. The lead wires are twisted and entwined with one another.

Abstract: 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.

Abstract: A stator includes a cylindrical stator core and a coil. The stator core is formed by stacking a plurality of core sheets. The stator core has a groove formed in an outer circumferential surface thereof and a slot. The coil is inserted in the slot. The groove is located parallel to an axis of the stator core and the slot is skewed with respect to the axis.

Abstract: An interphase insulating sheet of a rotating electric machine is disclosed. The interphase insulating sheet includes a first insulating portion arranged between first coil ends of two different phases, a second insulating portion arranged between second coil ends of two different phases, and bridge pieces inserted in slots. The first insulating portion includes a first coupling aid. The second insulating portion includes a second coupling aid. The first coupling aid and the second coupling aid each includes an outer surface facing radially outward of the stator core and an inner surface facing radially inward of the stator core. The first end portion of the bridge piece is located on the outer surface of the first coupling aid, and the second end portion of the bridge piece is located on the inner surface of the second coupling aid.

Abstract: An interphase insulating sheet of a rotating electric machine is disclosed. The interphase insulating sheet includes a first insulating portion arranged between first coil ends of two different phases, a second insulating portion arranged between second coil ends of two different phases, and bridge pieces inserted in slots. The first insulating portion and the second insulating portion each includes an outer surface facing radially outward of the stator core and an inner surface facing radially inward of the stator core. The bridge pieces each include a first end portion that is heat welded to the first insulating portion and a second end portion that is heat welded to the second insulating portion. When the first end portion is heat welded to the inner surface of the first insulating portion, the region including the edge of the first end portion is heat welded to the first insulating portion.