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Masahiko Fujita, Chiyoda-Ku JP

Masahiko Fujita, Chiyoda-Ku JP

Patent application numberDescriptionPublished
20080238242DYNAMOELECTRIC MACHINE - The dynamoelectric machine includes: a Lundell rotor that has: a pole core in which tapered claw-shaped magnetic pole portions are arranged in rows circumferentially so as to extend axially alternately from two axial ends and intermesh with each other; and a field coil that is mounted to the pole core; and a stator that has: a cylindrical stator core that surrounds the rotor so as to have a predetermined air gap; and a stator coil that is mounted to the stator core. The stator core is prepared by laminating and integrating dull finish magnetic steel plates, and a space factor of an iron portion in the stator core is in a range of 96 percent plus or minus 0.5 percent.10-02-2008
20090284106ROTARY ELECTRIC MACHINE INTEGRATED WITH CONTROL DEVICE - A rotary electric machine integrated with a control device includes stator current switching circuit sections, each of which has a switching element disposed on a heat sink; a field current switching circuit section; a control circuit section which controls the stator current switching circuit sections and the field current switching circuit section; and a case which contains the stator current switching circuit sections and has suction holes each for a cooling air inflow, the heat sinks of three phases for the stator current switching circuit sections being disposed in a circumferential direction of the rotary electric machine. In the rotary electric machine, of the suction holes of the case, an area of the suction hole for the heat sink of the phase disposed in the midst is set to be larger than an area of the suction hole of other phase.11-19-2009
20090322270VEHICLE MOTOR CONTROL APPARATUS - There is provided a vehicle motor control apparatus that alternately switches a first ON state in which one of the stator winding terminals is energized through an upper switch element group and another stator winding terminal is energized through a lower switch element group and a second ON state in which one of the stator winding terminals is energized through one of the upper switch element group and the lower switch element group and two other stator winding terminals are energized through the other switch element group, in one cycle period of an electric angle that changes as the rotor rotates.12-31-2009
20100001672GENERATOR MOTOR FOR VEHICLE AND CONTROL METHOD FOR THE SAME - A vehicle generator motor has a generator motor that is connected to an internal combustion engine and plural sets of three-phase windings, plural sets of inverter portions connected to the respective sets of the three-phase windings, and a control circuit portion for controlling the inverter portions in accordance with the operation state of the generator motor. When the generator motor operates as a motor and a variation value of an output torque or power generation amount thereof exceeds a predetermined value, the control circuit portion controls the inverter portions so as to stop armature current flowing in at least one set in plural sets of three-phase windings.01-07-2010
20100102683CONTROLLER-INTEGRATED ROTATING ELECTRIC MACHINE - Assembly of a controller-integrated rotating electric machine is facilitated. In a controller-integrated rotating electric machine provided with a rotating electric machine unit having a rotor (04-29-2010
20100289351ELECTRIC ROTATING MACHINE - The electric rotating machine is provided with an intermediate plate having a power circuit connection portion that is connected with an outgoing lead drawn out from a power circuit unit and an armature winding connection portion that is connected with the power circuit connection portion and an outgoing lead drawn out from an armature winding. The power circuit connection portion and the armature winding connection portion are arranged at desired positions and outgoing leads from the armature winding of the stator are drawn out in such a way as to fall within a given space, so that intermediate connection lines for connecting windings can be shortened. Accordingly, not only the breakage of an intermediate connection line caused by a vibration can be prevented, but also the switching elements can separately be arranged so as to reduce thermal interference between the switching elements; therefore, the switching elements can effectively be cooled.11-18-2010
20100289352ELECTRICAL ROTATING MACHINE - An object of the present invention is to provide an electrical rotating machine that prevents heat generated from a stator winding from being transmitted to an inverter circuit. A rotor having a field winding, and a stator having a stator winding arranged so as to surround the rotor are provided. One end of a rear bracket is connected to the stator, and arranged inside the rear bracket is a heat sink assembly including a heat sink having switching elements for controlling the field winding and the stator winding mounted thereto. The heat sink assembly is fixed to protruding portions protruding from an end surface of the rear bracket.11-18-2010
20100301692ELECTRICAL ROTATING MACHINE - An object of the present invention is to provide an electrical rotating machine capable of securing safety against collision. Included are a rotor having a field winding and cooling fans, and a stator having a stator winding, arranged so as to surround the rotor. A bracket 12-02-2010
20100308700AUTOMOTIVE DYNAMOELECTRIC MACHINE - An inverter power module includes: a heatsink that is shaped into a ring-shaped flat plate; a plurality of power MOSFETs that are mounted onto substrates, and mounted to a front surface of the heatsink; a circuit board that is a resin-molded body into which a plurality of inserted conductors are insert molded; and a bus bar that is fixed to the heatsink so as to be disposed on an opposite side of the circuit board facing the heatsink, and that is connected to a power source line of an inverter power circuit by means of a battery electric potential connecting terminal, the heatsink is electrically connected to the rear bracket by being fixed to the rear bracket, and the rear bracket is connected to a ground line of the inverter power circuit by means of the ground electric potential connecting terminal.12-09-2010

Patent applications by Masahiko Fujita, Chiyoda-Ku JP