Abstract:
A stator is disposed inside a motor case having a cylindrical shape. A winding wire is wound around the stator. A rotor is rotatably disposed inside the stator. A shaft is disposed in a rotational center of the rotor. A first plate covers one side of the motor case. The first plate rotatably supports one end portion of the shaft. A second plate has an insert hole extending in a thickness direction of the second plate. The second plate covers an other side of the motor case and rotatably supports an other end portion of the shaft. A wire extending portion has one end electrically connected to the winding wire. The wire extending portion extends from the winding wire and is inserted into the insert hole. A controller is disposed on a side of the second plate opposite to the motor case. The controller includes a substrate and is electrically connected to an other end of the wire extending portion at a side of the substrate opposite to the second plate to control energization to the winding wire.
Abstract:
A stator is fixed to a frame of an electric motor. A rotor is rotatably mounted to the frame to face the stator in a radial direction. A heat sink, to which a control substrate is attached, is mounted in one end of the frame. A heat transfer plate is interposed between heat-generating elements formed on the control substrate and the heat sink to absorb variations in a distance therebetween, the heat transfer plate allow heat to be transmitted from the heat-generating elements to the heat sink. The heat transfer plate includes a frame body mounted to the heat sink and a plurality of contact strips that flexibly protrude from the frame body and that abut the heat-generating elements.
Abstract:
An electric rotating machine has a first end frame and a second end frame for firmly supporting a stator between them in an axial direction of the electric rotating machine. An electronic control portion is mounted to a rear side of the first end frame. Multiple through-holes are formed at a radial-outer periphery of the second end frame. Each of multiple through-bolts is inserted into the respective through-holes from a side of the second end frame and screwed into the first end frame, to thereby firmly connect the first and the second end frames to each other.
Abstract:
A cover is configured into a tubular form and is fitted to a radially outer surface of each of projections of a rotor core and a radially outer surface of each of permanent magnets. A circumferential center portion of the radially outer surface of each projection contacts a radially inner surface of the cover. Circumferential end portions of the radially outer surface of each projection are radially inwardly spaced from the radially inner surface of the cover.
Abstract:
A frame of an electric motor opens in one end. A heat sink, to which a control substrate is connected, closes an opening of the frame. The frame includes a cylinder portion to which a stator is fixed, and a bottom portion that extends inward in the radial direction from the cylinder portion. A rotor is rotatably mounted in the frame to face the stator in the radial direction. A circumferential groove is formed in the bottom portion to face a stator coil in an axis of rotation direction. The circumferential groove is filled with a heat transfer gel. A coil end portion of the stator coil is inserted into the heat transfer gel.
Abstract:
A stator is fixed to a frame of an electric motor. A rotor is rotatably mounted to the frame to face the stator in a radial direction. A heat sink, to which a control substrate is attached, is mounted in an opening of the frame. A motor cover is attached to a front end of the frame to cover the heat sink. An adhesive groove, which has a fixed depth and is filled with an adhesive, is formed on the front end. A joining portion is formed on the rear end of the motor cover, and is inserted into the adhesive groove is an axis of rotation direction to join the motor cover with the frame in a liquid-tight manner.
Abstract:
Each permanent magnet provided in a rotor includes a projection that projects toward a corresponding predetermined portion of the rotor core. An inner peripheral surface of each permanent magnet, which is radially opposed to the corresponding predetermined portion of the rotor core, includes a primary contacting portion and two primary non-contacting portions. The primary contacting portion contacts the corresponding predetermined portion of the rotor core at a circumferential location, which corresponds to the projection. The primary non-contacting portions do not contact the rotor core and are located on two circumferentially opposite sides, respectively, of the primary contacting portion.
Abstract:
A cover is configured into a tubular form and is fitted to a radially outer surface of each of projections of a rotor core and a radially outer surface of each of permanent magnets. A circumferential center portion of the radially outer surface of each projection contacts a radially inner surface of the cover. Circumferential end portions of the radially outer surface of each projection are radially inwardly spaced from the radially inner surface of the cover.
Abstract:
A motor drive apparatus includes a rear end frame between a motor case and a control unit case. A shaft of a motor unit is supported rotatably by a bearing fixed to the rear end frame. A first socket-spigot fitting surface formed on the rear end frame is fitted with a second socket-spigot fitting surface formed on a heat sink. A rotation angle sensor mounted on a control unit substrate attached to the heat sink is provided on the rotation axis of the shaft. The rotation angle sensor can thus accurately detect the magnetic field of a magnet provided at the end of the shaft.
Abstract:
An electronic apparatus includes a rotating electric machine that has a plurality of multi-phase winding sets, each of which has a plurality of phase windings; a plurality of inverter circuits that are connected to the plurality of multi-phase winding sets respectively; and a control circuit that controls the plurality of inverter circuits such that a multi-phase alternating current is supplied to each of the plurality of multi-phase winding sets from each of the plurality of inverter circuits. The control circuit determines that a short circuit occurs when i) a plurality of phase current added values obtained by adding each phase current flowing through each of the plurality of phase windings calculated at each of the plurality of multi-phase winding sets; and ii) an absolute value of a total phase current added value obtained by adding all of the plurality of phase current added values is smaller than a predetermined value.