Patents by Inventor Minako IEFUJI

Minako IEFUJI has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Permanent magnet type motor and electric power steering apparatus
    Patent number: 10199895
    Abstract: To obtain a permanent magnet type motor capable of securing controllability of a motor and utilizing reluctance torque. An armature winding is a plurality of sets of polyphase windings; the plurality of sets of the armature winding is supplied with current from each individual inverter; the rotor core is provided with permanent magnets on a surface portion thereof, the permanent magnets being circumferentially arranged and the adjacent permanent magnets having polarities opposite to each other; a protrusion portion is provided between the adjacent permanent magnets, the protrusion portion being provided in a protruding condition from the rotor core and being made of a magnetic substance; and a non-magnetic gap portion is interposed between the protrusion portion and the permanent magnet in a rotating shaft direction.
    Type: Grant
    Filed: April 9, 2013
    Date of Patent: February 5, 2019
    Assignee: Mistubishi Electric Corporation
    Inventors: Yu Hirotani, Minako Iefuji, Yuji Takizawa, Sachiko Kawasaki, Masatsugu Nakano, Toyoaki Udo, Satoru Akutsu
  • PERMANENT MAGNET TYPE MOTOR AND ELECTRIC POWER STEERING APPARATUS
    Publication number: 20150333586
    Abstract: To obtain a permanent magnet type motor capable of securing controllability of a motor and utilizing reluctance torque. An armature winding is a plurality of sets of polyphase windings; the plurality of sets of the armature winding is supplied with current from each individual inverter; the rotor core is provided with permanent magnets on a surface portion thereof, the permanent magnets being circumferentially arranged and the adjacent permanent magnets having polarities opposite to each other; a protrusion portion is provided between the adjacent permanent magnets, the protrusion portion being provided in a protruding condition from the rotor core and being made of a magnetic substance; and a non-magnetic gap portion is interposed between the protrusion portion and the permanent magnet in a rotating shaft direction.
    Type: Application
    Filed: April 9, 2013
    Publication date: November 19, 2015
    Applicant: Mitsubishi Electric Corporation
    Inventors: Yu HIROTANI, Minako IEFUJI, Yuji TAKIZAWA, Sachiko KAWASAKI, Masatsugu NAKANO, Toyoaki UDO, Satoru AKUTSU