摘要:
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.
摘要:
A power transmission device includes a first one-way clutch that transmits a rotational power of a pulley to a rotating shaft, and a second one-way clutch that transmits a rotational power of a rotor of a motor to the rotating shaft. The first one-way clutch is of inner cam type in which an engagement cam-surface is formed in an outer periphery of a first inner ring, while the second one-way clutch is of outer cam type in which an engagement cam-surface is formed in an inner periphery of a second outer ring. This arrangement improves engagement performance of the first one-way clutch as well as reducing heat generation of the second one-way clutch, so that the lifetime of grease is prolonged.
摘要:
An electric motor, which has a stator and a rotor including a permanent magnet, has a guide for guiding movably in an axial direction of the rotor and an actuator which is operable to move the rotor axially. In addition, a motor-driven compressor includes the electric motor for compressing and discharging gas in its compression chamber by compression of the compressor based upon rotation of its rotary shaft driven by the electric motor.
摘要:
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.
摘要:
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.
摘要:
A method for mounting a coil onto a stator for a rotary electric machine. The method includes forming a coil piece by winding wire having a flat cross section into a single row lamination state including wire layers that are aligned along a line that is perpendicular to flat surfaces of the wire. The coil piece is formed so that a first portion to be inserted in the slot and a second portion that is not inserted in the slot appear alternately along the coil piece. The method also includes displacing the wire layers at the first portion from one another to change the single row lamination state to a connectively laminated stat e in which the wire layers at the portion to be inserted in the slot each adjacent pair of the wire layers partially overlap with respect to a direction perpendicular to the flat surfaces of the wire. The method further includes inserting the wires of the first portion into the slot, by passing each of the wire layers through the opening of the slot successively from the wire layer at the top of the lamination and displacing each of the wire layers at the first portion from each other.
摘要:
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.
摘要:
A method for mounting a coil onto a stator for a rotary electric machine. The method includes forming a coil piece by winding wire having a flat cross section into a single row lamination state including wire layers that are aligned along a line that is perpendicular to flat surfaces of the wire. The coil piece is formed so that a first portion to be inserted in the slot and a second portion that is not inserted in the slot appear alternately along the coil piece. The method also includes displacing the wire layers at the first portion from one another to change the single row lamination state to a connectively laminated stat e in which the wire layers at the portion to be inserted in the slot each adjacent pair of the wire layers partially overlap with respect to a direction perpendicular to the flat surfaces of the wire. The method further includes inserting the wires of the first portion into the slot, by passing each of the wire layers through the opening of the slot successively from the wire layer at the top of the lamination and displacing each of the wire layers at the first portion from each other.
摘要:
In this driving force transmission apparatus, with a simple constitution employing a one-way clutch 20 instead of an electromagnetic clutch, the driving force derived from the motor 33 can be transmitted to the rotating shaft 1 during engine stops, and the driving force of the engine can be transmitted to the rotating shaft 1 during engine operations. Also, the pulley 3 is held against the connecting portion 11 and the fixed-side member 26 by means of first and second two ball bearings 21, 30 disposed axially adjacent to first and second inner cylinder portions 6, 7, respectively, between which the opening portion 5 of the pulley 2 is interposed. This simple driving force transmission apparatus can switch between transmission and non-transmission of driving force from pulley to rotating shaft, and transmits the driving force of a motor directly to the rotating shaft in the non-transmission state.
摘要:
A conventional hybrid compressor compresses gas when power is transmitted from a vehicular drive source via a power transmission mechanism and when an electric motor, which is incorporated in the power transmission mechanism, is actuated. A motor wiring component extends from the electric motor to the outside of the power transmission mechanism. The motor wiring is provided with shape maintaining means for maintaining the shape.