Abstract: The permanent magnet embedded rotating electrical machine includes a rotor and a plurality of flat permanent magnets. The rotor has on an outer periphery thereof a plurality of pairs of concave portions and a plurality of convex portions. Each of the convex portions is located between the pair of concave portions. The concave portions are formed at radially outward of respective adjacent magnetic pole ends of the permanent magnet. A bridge is provided in the rotor at an angular position about an axis of the rotor between opposed magnetic pole ends of two adjacent permanent magnets. Each concave portion at radially outward of the magnetic pole end of the permanent magnet is located close to the center of the same permanent magnet in relation to the bridge next to the permanent magnet in the circumferential direction of the rotor.

Abstract: An electric motor for a motor-driven compressor is provided. The electric motor includes a stator and a rotor. The stator is fixed to a housing. The rotor is arranged outward of the stator. The rotor is mounted on a rotary shaft to rotate integrally with the rotary shaft. The stator includes slots and a stator coil wound about the slots. The rotor includes a rotary support and a magnet. The rotary support is fixed to the rotary shaft to rotate integrally with the rotary shaft. The magnet is supported by the rotary support. The arrangement of the magnetic poles of the magnet in the circumferential direction is a Halbach array.

Abstract: A stator of a motor includes a stator core having a plurality of teeth forming slots between any two adjacent teeth and a plurality of phase coils provided in the slots, each formed by wave winding and made of a continuous wire. Each phase coil includes a first wave winding bundle and a second wave winding bundle that is passed through a first slot and a second slot. The first slot is located adjacent to one side of a group of slots through which the phase coils other than said each phase coil are passed and the second slot is located adjacent to the other side of the group of slots. The first wave winding bundle is passed through a third slot and a fourth slot. The third slot is located adjacent to the first slot on the opposite side of the first slot from the group of slots and the fourth slot is located adjacent to the second slot on the opposite side of the second slot from the group of slots.

Abstract: A motor-driven compressor includes an electric motor, a compression mechanism driven by the electric motor so as to compress refrigerant gas, a metal housing accommodating the electric motor and the compression mechanism, a suction passage communicable with interior of the housing wherein refrigerant gas flows through the suction passage, a discharge passage communicable with the interior of the housing wherein refrigerant gas discharged from the compression mechanism flows through the discharge passage and a check valve that is provided in at least one of the suction passage and the discharge passage, opened while the compressor is in operation and closed while the compressor is at a stop.

Abstract: A stator core includes an insertion hole that has an opening in an outer peripheral surface of the stator core and a bent portion in the stator core. A cluster block includes an insertion piece, which is inserted into the insertion hole via the cornered portion. The cluster block is attached to the stator core by engaging the insertion piece with the insertion hole.

Abstract: A stator of a motor includes a stator core having a plurality of teeth forming slots between any two adjacent teeth and a plurality of phase coils provided in the slots, each formed by wave winding and made of a continuous wire. Each phase coil includes a first wave winding bundle and a second wave winding bundle that is passed through a first slot and a second slot. The first slot is located adjacent to one side of a group of slots through which the phase coils other than said each phase coil are passed and the second slot is located adjacent to the other side of the group of slots. The first wave winding bundle is passed through a third slot and a fourth slot. The third slot is located adjacent to the first slot on the opposite side of the first slot from the group of slots and the fourth slot is located adjacent to the second slot on the opposite side of the second slot from the group of slots.

Abstract: A heat recovery system includes an electric rotary device, a heat exchanger, a pipe and a reservoir. The electric rotary device has a stator core and a housing. The stator core is wounded with a coil. The heat exchanger provides heat exchanging between first and second heat medium. The first heat medium is in contact with the coil and absorbs heat from the coil. The pipe connects the electric rotary device to the heat exchanger and transfers the first heat medium. The reservoir is formed in the housing and stores the first heat medium. The electric rotary device has an insulative body. The insulative body prevents heat of the first heat medium from being dissipated outside of the housing.

Abstract: A heating and cooling system, which includes a refrigerant circulation circuit, first and second targets, first and second refrigerant circuits, a first switching section, and a control device, is disclosed. The first switching section is selectively switched between a first position at which a refrigerant discharged from a discharge area of a compressor is permitted to flow to the first target and a second position at which the refrigerant is not permitted to flow to the first target. The control device switches the first switching section to the first position so that the refrigerant circulation circuit functions as a first refrigerant circuit, thereby heating the first target and cooling the second target. The control device switches the first switching section to the second position so that the refrigerant circulation circuit functions as a second refrigerant circuit, thereby cooling only the second target.

Abstract: The permanent magnet embedded rotating electrical machine includes a rotor and a plurality of flat permanent magnets. The rotor has on an outer periphery thereof a plurality of pairs of concave portions and a plurality of convex portions. Each of the convex portions is located between the pair of concave portions. The concave portions are formed at radially outward of respective adjacent magnetic pole ends of the permanent magnet. A bridge is provided in the rotor at an angular position about an axis of the rotor between opposed magnetic pole ends of two adjacent permanent magnets. Each concave portion at radially outward of the magnetic pole end of the permanent magnet is located close to the center of the same permanent magnet in relation to the bridge next to the permanent magnet in the circumferential direction of the rotor.

Abstract: A method for mounting coil onto stator for rotary electric machine. The method includes forming coil pieces by winding wire with flat cross section into single row lamination state including wire layers aligned along perpendicular line to flat surfaces of wire. The coil is formed for first portion to be inserted in slot and second portion not inserted in slot appear alternately along the coil. The method displaces wire layers at the first portion changing the single row lamination state to connectively laminated state where wire layers at portion to be inserted in slot each adjacent pair of the wire layers partially overlap with respect to direction perpendicular to flat wire surfaces. The method includes inserting wires of first portion into slot, passing each wire layer through slot opening successively from the top wire layer of lamination and displacing each wire layer at first portion from each other.

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 plurality of convex portions are located inside of a virtual circumferential surface. Each convex portion connects an adjacent pair of circumferential portions with each other. Each convex portion is an arcuate curve bulging radially outward. Each convex portion defines a minimum radius. A difference between a radius R and the minimum radius is a depth Dh. Dhr=Dh×25.5/R. A range of an angular width A in relation to circumferential portion and a range of the depth Dh are set by the following expression, (5.6×Dhr+11.3)°×6/p?A<35°×6/p and A<[360/p?2×arccos]°??(1) Therefore, decrease in torque is prevented. Torque pulsation is suppressed.

Abstract: A stator of an electric motor includes teeth, coils each wound about one of the teeth, and a yoke. Each tooth includes a tooth main body and a tooth reinforcing portion, which is integrally molded with at least a part of the surface of the tooth main body. The tooth main portions are formed a powder magnetic core material. The tooth reinforcing portions have a higher mechanical strength than that of the tooth main bodies. The yoke has fitting openings each receiving one of the teeth. Each tooth is fitted to the corresponding fitting opening in such a manner that the tooth reinforcing portion contacts a wall surface that defines the fitting opening.

Abstract: A housing of an electric motor includes an inner circumferential surface, which includes recesses arranged along the circumferential direction. On an outer circumferential surface of a stator core of a stator are provided protrusions arranged along the circumferential direction. Fitting each protrusion to the corresponding recess fixes the stator core to the housing. A rotor is provided radially inward of the stator. In a state where each protrusion is fitted to the corresponding recess, a pair of side surfaces of each protrusion are retained by a pair of inner side surfaces of the corresponding recess in the circumferential direction of the housing. A gap is formed between an end face of each protrusion and an inner bottom surface of the corresponding recess facing the end face along the entire surface of the end face.

Abstract: A rotating electric machine including circumferential portions respectively corresponding to magnetic pole centers of permanent magnets and defined along the outer circumference of the rotor at a plurality of locations, with each circumferential portion extending along part of a virtual circumferential surface, which is coaxial with the rotor. The circumferential portions are spaced from one another in the circumferential direction. Convex portions connect adjacent pairs of the circumferential portions. Each convex portion is located radially inward from the circumferential surface, projects in a radially outward direction, and includes angled portions directed in the radially outward direction. The rotating electric machine suppresses decrease in the average value of the output torque and does not use reluctance torque to increase the average value of the output torque.

Abstract: An armature for use in a motor has a plurality of teeth, a plurality of slots and coils of three kinds of phases. A plurality of the slots is formed between the coadjacent teeth. The coils of three phases are wound around the teeth. The armature has a coil structure, according to which radial force acting on a specific tooth is greater than radial force acting on another tooth. A peak value of the radial force acting on the specific tooth is approximated to a peak value of the radial force acting on another tooth in such a manner that a flux path in and/or adjacent to the specific tooth is made narrower than a flux path in and/or adjacent to another tooth.

Abstract: A stator of an electric motor includes teeth, coils each wound about one of the teeth, and a yoke. Each tooth includes a tooth main body and a tooth reinforcing portion, which is integrally molded with at least a part of the surface of the tooth main body. The tooth main portions are formed a powder magnetic core material. The tooth reinforcing portions have a higher mechanical strength than that of the tooth main bodies. The yoke has fitting openings each receiving one of the teeth. Each tooth is fitted to the corresponding fitting opening in such a manner that the tooth reinforcing portion contacts a wall surface that defines the fitting opening.

Abstract: A method for mounting coil onto stator for rotary electric machine. The method includes forming coil pieces by winding wire with flat cross section into single row lamination state including wire layers aligned along perpendicular line to flat surfaces of wire. The coil is formed for first portion to be inserted in slot and second portion not inserted in slot appear alternately along the coil. The method displaces wire layers at the first portion changing the single row lamination state to connectively laminated state where wire layers at portion to be inserted in slot each adjacent pair of the wire layers partially overlap with respect to direction perpendicular to flat wire surfaces. The method includes inserting wires of first portion into slot, passing each wire layer through slot opening successively from the top wire layer of lamination and displacing each wire layer at first portion from each other.

Abstract: A housing of an electric motor includes an inner circumferential surface, which includes recesses arranged along the circumferential direction. On an outer circumferential surface of a stator core of a stator are provided protrusions arranged along the circumferential direction. Fitting each protrusion to the corresponding recess fixes the stator core to the housing. A rotor is provided radially inward of the stator. In a state where each protrusion is fitted to the corresponding recess, a pair of side surfaces of each protrusion are retained by a pair of inner side surfaces of the corresponding recess in the circumferential direction of the housing. A gap is formed between an end face of each protrusion and an inner bottom surface of the corresponding recess facing the end face along the entire surface of the end face.

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.