Patents by Inventor Huafei CAI

Huafei CAI 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).

  • Control apparatus and motor
    Patent number: 11139761
    Abstract: A control apparatus includes a controller that controls a motor, a first transmission channel connected to a first power-supply terminal of an alternating-current source that supplies an alternating-current voltage, a second transmission channel connected to a second power-supply terminal of the alternating-current source, and a third transmission channel connected to each of the first transmission channel and the second transmission channel. The controller switches the rotational speed of the motor based on the voltage value of a signal input to the controller in accordance with a first connection status of the first transmission channel and the third transmission channel and a second connection status of the second transmission channel and the third transmission channel.
    Type: Grant
    Filed: November 8, 2019
    Date of Patent: October 5, 2021
    Assignee: NIDEC SERVO CORPORATION
    Inventors: Keiichi Abe, Koji Harada, Huafei Cai, Masashi Nagumo, Takayuki Suematsu
  • CONTROL APPARATUS AND MOTOR
    Publication number: 20200195174
    Abstract: A control apparatus includes a controller that controls a motor, a first transmission channel connected to a first power-supply terminal of an alternating-current source that supplies an alternating-current voltage, a second transmission channel connected to a second power-supply terminal of the alternating-current source, and a third transmission channel connected to each of the first transmission channel and the second transmission channel. The controller switches the rotational speed of the motor based on the voltage value of a signal input to the controller in accordance with a first connection status of the first transmission channel and the third transmission channel and a second connection status of the second transmission channel and the third transmission channel.
    Type: Application
    Filed: November 8, 2019
    Publication date: June 18, 2020
    Inventors: Keiichi ABE, Koji HARADA, Huafei CAI, Masashi NAGUMO, Takayuki SUEMATSU