Patents by Inventor Ryo NIIDA

Ryo NIIDA 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).

  • Motor control circuit and motor
    Patent number: 10381961
    Abstract: A motor control circuit includes: first high and low side switches connected to one end of a drive coil of a brush-less motor, and second high and low side switches connected to the other end of the drive coil. In a first energization state, a positive drive current is supplied to the drive coil. In a second energization state, a negative drive current is supplied to the drive coil. In a first reflux state, a positive circulation current is applied to the drive coil after the first energization state. In a second reflux state, a negative circulation current is applied to the drive coil after the second energization state. A first non-energization state is between the first reflux state and the second energization state after the first reflux state, and a second non-energization state is between the second reflux state and the first energization state after the second reflux state.
    Type: Grant
    Filed: August 2, 2018
    Date of Patent: August 13, 2019
    Assignee: MABUCHI MOTOR CO., LTD.
    Inventors: Ryo Niida, Yasuyuki Takamori
  • MOTOR CONTROL CIRCUIT AND MOTOR
    Publication number: 20190052199
    Abstract: A motor control circuit includes: first high and low side switches connected to one end of a drive coil of a brush-less motor, and second high and low side switches connected to the other end of the drive coil. In a first energization state, a positive drive current is supplied to the drive coil. In a second energization state, a negative drive current is supplied to the drive coil. In a first reflux state, a positive circulation current is applied to the drive coil after the first energization state. In a second reflux state, a negative circulation current is applied to the drive coil after the second energization state. A first non-energization state is between the first reflux state and the second energization state after the first reflux state, and a second non-energization state is between the second reflux state and the first energization state after the second reflux state.
    Type: Application
    Filed: August 2, 2018
    Publication date: February 14, 2019
    Inventors: Ryo NIIDA, Yasuyuki TAKAMORI