Patents by Inventor Shoichi Ohozeki

Shoichi Ohozeki 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).

  • Semiconductor device for driving motor, three-phase motor and motor driving apparatus with the semiconductor device and fan motor
    Patent number: 7859210
    Abstract: In order to prevent a short circuit of top and bottom arms of a motor driving IC when noise is added to six control signals for controlling six switching elements, there is provided a semiconductor device for driving a motor, being sealed with resin as one package and comprising: six switching elements for driving a three-phase motor; three output terminals for outputting voltages to the three-phase motor; at least one driving circuit for driving the six switching elements; three control signal input terminals; and a function) of generating six control signals for control of the six switching elements based on three control signals inputted through the three control signal input terminals.
    Type: Grant
    Filed: February 1, 2008
    Date of Patent: December 28, 2010
    Assignees: Hitachi, Ltd., Hitachi Information & Control Solutions, Ltd.
    Inventors: Kenji Sakurai, Hiroyuki Hasegawa, Tomoyuki Utsumi, Shoichi Ohozeki, Daisuke Maeda, Mitsuhiro Mishima
  • SEMICONDUCTOR DEVICE FOR DRIVING MOTOR, THREE-PHASE MOTOR AND MOTOR DRIVING APPARATUS WITH THE SEMICONDUCTOR DEVICE AND FAN MOTOR
    Publication number: 20080224643
    Abstract: In order to prevent a short circuit of top and bottom arms of a motor driving IC when noise is added to six control signals for controlling six switching elements, there is provided a semiconductor device for driving a motor, being sealed with resin as one package and comprising: six switching elements for driving a three-phase motor; three output terminals for outputting voltages to the three-phase motor; at least one driving circuit for driving the six switching elements; three control signal input terminals; and a function) of generating six control signals for control of the six switching elements based on three control signals inputted through the three control signal input terminals.
    Type: Application
    Filed: February 1, 2008
    Publication date: September 18, 2008
    Inventors: Kenji Sakurai, Hiroyuki Hasegawa, Tomoyuki Utsumi, Shoichi Ohozeki, Daisuke Maeda, Mitsuhiro Mishima