Patents Represented by Law Firm Birch, Stewart, Kolasch & Birsh
  • Control device for use in shunt motor
    Patent number: 4037144
    Abstract: A system is disclosed for controlling the speed and torque of an electric motor throughout its entire operating range from low speed operation to high speed operation, while minimizing the total loss of energy in the motor. The minimization of energy loss is facilitated by controlling the motor field current during the low running speed of the motor as well as during the high running speed.
    Type: Grant
    Filed: March 28, 1975
    Date of Patent: July 19, 1977
    Assignee: Agency of Industrial Science & Technology
    Inventors: Tsutomu Ohmae, Hideo Yano, Toshio Suzuki