摘要:
An automotive alternator in which a fan rotating together with a rotor to direct air from a suction aperture into a case, blow the air centrifugally, and discharge the air externally through a discharge aperture has a blade including an interposed portion extending axially from an end surface of a pole core between an adjacent pair of claw-shaped magnetic poles. For this reason, cooling of a rotor coil and a stator coil is improved by improving capacity of the fan in a limited space, thereby enabling output to be improved.
摘要:
In a dynamoelectric machine according to the present invention, a first three-phase wye-delta hybrid winding and a second three-phase wye-delta hybrid winding are installed in a stator core having a plurality of slots. A first delta U winding portion and a first wye U winding portion are housed in identical slots, a first delta V winding portion and a first wye V winding portion are housed in identical slots, and a first delta W winding portion and a first wye W winding portion are housed in identical slots. A second delta U winding portion and a second wye U winding portion are housed in identical slots, a second delta V winding portion and a second wye V winding portion are housed in identical slots, and a second delta W winding portion and a second wye W winding portion are housed in identical slots.
摘要:
An inverter-integrated rotating electric machine includes an enclosure in which a vent hole is formed, an AC motor accommodated in the enclosure, the AC motor including a rotor and a fan whose rotation introduces external air into the enclosure from outside through the vent hole, the fan being fixed to the rotor, and an inverter unit accommodated in the enclosure and disposed in the vent hole. The inverter unit includes a power circuit portion and a control circuit portion whose control board is housed in a case which thermally isolates the control board from the power circuit portion. The power circuit portion is located at a position facing the fan and the control circuit portion is located upstream of the power circuit portion with respect to an inflow of the external air. Signal lines from the power circuit portion are connected to signal lines from the control circuit portion through holes formed in the case.
摘要:
In a rotary electric machine having a rotary electric machine part and a switching circuit part for performing current control of this rotary electric machine part and a heat-dissipating device for cooling multiple switching devices constituting this switching circuit part, the cooling effect on the switching devices is improved. The rotary electric machine has a switching circuit part for performing current control of a rotary electric machine part and a heat-dissipating device for cooling multiple switching devices constituting this switching circuit part, and the heat-dissipating device is made up of multiple heat sinks arrayed in the circumferential direction of the rotary shaft of the rotary electric machine part so as to surround the rotary shaft and having the multiple switching devices distributed among and mounted upon them.
摘要:
A method for assembling semiconductor switching elements and a heat sink in a rotary electric machine includes: a first step in which bare chips of the semiconductor switching elements are bonded to the heat sink using a good heat conductive bonding material; a second step which connects the bare chips to a wiring part by wire bonding; and a third step in which a resin which seals the bare chips and the wiring part is applied to the heat sink in a striding manner in a state that output terminal portions of the wiring part and fins of the heat sink are exposed to the outside of the resin.
摘要:
A controller-integrated rotating electrical machine includes: a power element disposed adjacent to a rotating electrical machine main body and controlled to perform control of energization to the rotating electrical machine main body; a control circuit disposed adjacent to the power element in the longitudinal direction and at a side opposite to the rotating electrical machine main body to control the power element; a power line connecting the rotating electrical machine main body to the power element and having a straight line portion having a substantially straight line shape; and a current detector disposed at the straight line portion and detecting a line current flowing between the power element and the rotating electrical machine main body via the power line at the straight line portion so that an output from the current detector is used by the control circuit for the energization control.
摘要:
A stator iron core of an electric motor including plural magnetic pole segments connected and confronted by plural confronting surfaces. Further, two of the confronting surfaces respectively include a V-shaped projection and a V-shaped recess.
摘要:
A rotating electrical machine for a vehicle includes a stator having a multi-phase armature winding, a rotor having a pair of field cores which rotate together with a rotating shaft, and a field winding for magnetizing the pair of field cores, the pair of field cores respectively includes magnetic poles extending in an axial direction of the rotating shaft and being arranged to alternately engage with each other through a predetermined clearance Dc, each of the magnetic poles having a width in a rotation direction thereof is formed in a stair shape to be smaller toward a tip of the width, and the clearance Dc between adjacent the magnetic poles is set within a range from 50° to 70° in electrical angle. As a result, the rotating electrical machine for a vehicle can be obtained in which exciting force of harmonic components is reduced, electromagnetic noise, torque ripple and the like are effectively suppressed, and the productivity is excellent.
摘要:
In a connection portion of a stator winding, conductor wires extending outward from a slot pair separated by a predetermined number of slots are joined such that end portions of conductor wires extending outward from addresses of the slot pair separated by three or more addresses are joined together (a distant-address joint portion), and end portions of conductor wires in the slot pair separated by two or less addresses are joined together (a near-address joint portion). The distant-address joint portion is offset in a circumferential direction relative to the near-address joint portion.
摘要:
A wire-winding machine for forming coils (20) on individual magnetic pole teeth (11a) of a core member (13) which is produced by joining a plurality of core segments (11), each of the core segments (11) having a yoke portion (11c) and a magnetic pole tooth (11a) projectingly formed on an inside surface (11d) of the yoke portion (11c), comprises a core member positioner including a rotating roller (14), large-diameter guide rollers (21) and small-diameter guide rollers (22) which together serve to bend the core member (13) and hold it in a position where the core segments (11.3, 11.5) adjacent to the core segment (11.4) on which the coil (20) is currently wound do not project in the direction of its magnetic pole tooth (11a) beyond a boundary surface (S) of the yoke portion (11c) of the core segment (11.4) on which the coil (20) is currently wound.