Abstract: A Rankine cycle circuit is constituted by an expander, which forms a fluid machine, a condenser, a gear pump, which forms a fluid machine, and a boiler. A discharge passage is connected to a discharge chamber of a pump chamber. A branch passage is connected to the discharge passage, and a restriction passage is provided at the end of the branch passage. The restriction passage is open to an internal space K in a generator housing. An outflow passage extends through a partition wall of a center housing member and a side plate. The internal space K in which an alternator is located communicates with an outlet chamber through the outflow passage.

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 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 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: An electric compressor includes a housing, an electric motor, a compression mechanism, and a resin molding. The electric motor includes a coil having coil ends projecting from each of two end surfaces of the stator. Refrigerant flows through the housing that accommodates the electric motor. The resin molding covers each coil end and includes an opening that exposes part of the coil end to the interior of the housing.

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: A heat release device is for use with a multilayer board that has an inner layer serving as a power layer. The heat release device includes a heat release member thermally and electrically connected to the power layer, and a heat release board having a heat release layer and a shield layer electrically insulated from each other. The heat release layer is thermally and electrically connected to the heat release member. The shield layer serves to shield against electromagnetic noise radiated from the heat release layer. The shield layer is electrically insulated from the heat release member connected to the heat release layer. The heat release device also includes an electrically conductive member electrically connected to the shield layer and grounded, and an insulator through which the heat release layer is thermally connected to the electrically conductive member.

Abstract: A motor-driven compressor includes a housing having an inlet port, a compression mechanism for compression of refrigerant introduced from an external refrigerant circuit via the inlet port into the housing, an inverter having a heat-generating component, an electric motor driven by the inverter, and a rotary shaft rotated by the electric motor thereby to drive the compression mechanism. The electric motor, the compression mechanism and the inverter are aligned in the housing in axial direction of the rotary shaft. An inlet pipe is connected to the inlet port. The housing has an outer peripheral surface in contact with the inlet pipe. The heat-generating component of the inverter is disposed adjacent to or in contact with the inlet pipe so as to be thermally coupled to the inlet pipe.

Abstract: A motor-driven compressor has a housing and a partition. A compressing portion and an electric motor as the drive source of the compressing portion are accommodated in a first area. A drive circuit for the motor is arranged in a second area so as to have dissipation of the drive circuit. The compressor further includes a conductive member electrically connected to the circuit and fixed to the partition, and an electrical connection portion electrically connecting the conductive member to the motor. The connection portion is partly received in a passing area formed between the housing and the motor. The housing has a suction port and a discharge port. The discharge port is located at a position farther from the partition than the suction port and the passing area. An insertion member in the passing area restricts flow of refrigerant in the housing toward the discharge port via the passing area.

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: A compressor includes a housing, a compression mechanism and an electric motor driving the compression mechanism. The electric motor includes a stator fixed to the housing, a rotary shaft rotatably supported by the housing, a rotor that is fixed on the rotary shaft and has a rotor core made of a plurality of laminated steel sheets, a magnet insertion hole formed through the rotor core, a permanent magnet loosely fitted in the magnet insertion hole, a first clearance formed between inner surface of the magnet insertion hole and outer surface of the permanent magnet, a second clearance formed between end surface of the rotor core and surface of the permanent magnet in the axial direction of the rotor core and resin filled in the first clearance and the second clearance so as to surround entire surface of the permanent magnet.

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: An electric compressor including a compression mechanism, an electric motor, an inverter, a compressor housing, a sealed terminal, a cluster block, and a metal brace. The sealed terminal is arranged in the compressor housing and electrically connects the inverter and the electric motor. Further, the sealed terminal includes a terminal pin, which is formed from a conductive material, a terminal holder, and an insulative body. The cluster block includes an insertion hole into which the terminal pin is inserted. The metal brace electrically connects the terminal pin to the lead wire. The cluster block includes a protrusion projecting around the insertion hole and surrounding part of the insulative body. The insertion hole has an inside diameter larger than an outside diameter of the terminal pin.

Abstract: An electric compressor includes a compression mechanism, an electric motor that drives the compression mechanism, a compressor housing that accommodates the electric motor and the compression mechanism, an inverter housing coupled to the compressor housing and including an inverter accommodation chamber that accommodates the inverter, and a sealed terminal arranged in the compressor housing. The sealed terminal electrically connects the inverter and the electric motor. The sealed terminal includes a terminal pin, which is formed from a conductive material, a terminal holder, which holds the terminal pin, and an insulative body, which insulates the terminal pin from the terminal holder. The insulative body includes a first insulative body, which is arranged in the inverter accommodation chamber and formed from a ceramic, and a second insulation body, which is arranged in the compressor housing and formed from glass.

Abstract: A method for detecting deterioration of a permanent magnet in an electric motor is characterized by peak current measuring steps and a determination step. In the first peak current measuring step, when the electric motor is started, a first pulsed voltage is applied to the multi-phase coils so as to generate magnetic flux directed in the same direction as generated by the permanent magnet and a first peak current is measured. In a second peak current measuring step, a second pulsed voltage is applied to the multi-phase coils so as to generate magnetic flux directed in the direction opposite to the direction in which magnetic flux is generated by the permanent magnet and a second peak current is measured. In a determination step, it is determined whether or not the permanent magnet is deteriorated based on the difference of the absolute value between the first and the second peak currents.

Abstract: A motor includes a rotor, a stator, an insulating member and a coil. The insulating member made of insulating films is inserted in a slot formed through a stator core of the stator. Cuff portions are formed in the coil-side insulating film by bending both ends thereof. An opening is formed in the coil-side insulating film at a region located at an intersection between a first bend line along which the coil-side insulating film is bent into a curved shape so as to fit the slot and a second bend line along which the coil-side insulating film is bent for forming the cuff portion. The stator core-side insulating film is laid on the coil-side insulating film such that the cuff portion overlaps a surface of the stator core-side insulating film on the stator core side and the stator core-side insulating film covers at least a part of the opening.

Abstract: A motor-driven compressor has a compression mechanism, a rotary shaft, an electric motor, a motor drive circuit, a connecting terminal and a housing assembly. The compression mechanism, the electric motor, and the motor drive circuit are disposed along the axial direction of the rotary shaft in the housing assembly having first through third housings. The first housing is used for mounting the electric motor and the compression mechanism. The second housing has a terminal mounting portion for fixing the connecting terminal. The first and second housings have fastening portions at the radially peripheral portion thereof. The third housing is joined to the second housing to form an accommodation space for accommodating the motor drive circuit. The closed casing is formed by fastening the fastening portions of the first and second housings by means of a first bolt and connecting the second housing to the open end of the first housing.

Abstract: A motor-driven compressor has a compression mechanism, a rotary shaft, an electric motor, a motor drive circuit and a housing assembly. The compression mechanism, the electric motor and the motor drive circuit are disposed along the axial direction of the rotary shaft in the housing assembly. The housing assembly has first and second housings. The first housing mounts the electric motor and the compression mechanism. The first housing has first and second mounting lugs formed integrally with the peripheral surface of the first housing. The second housing is joined to the first housing for accommodating the motor drive circuit. The second housing has a third mounting lug formed integrally with the second housing. The first through third mounting lugs are fastened to a mounting object to which the motor-driven compressor is to be mounted by means of fastening members.

Abstract: An electric motor includes a cylindrical stator that is formed with a plurality of slots. The cylindrical stator has polyphase coils that are formed by winding a plurality of conductive wires in the slots to have polyphase, a wire bundle and an insulating tube covering the wire bundle. Each conductive wire includes a core wire and an insulator that covering the core wire. The wire bundle has a drawing portion, a connecting portion and an elongated portion that is elongated between the drawing portion and the connecting portion for increasing creepage distance between the connecting portion and the housing thereby to increase insulation resistance. The connecting portion of the wire bundle provides a neutral point of the electric motor. The elongated portion and the connecting portion of the wire bundle are covered with the insulating tube.