Patents Assigned to 501 Aeroflex Laboratories, Incorporated
  • Low cogging motor
    Patent number: 4713569
    Abstract: A three phase, permanent magnet rotor, AC electric motor includes a twenty-four unskewed slot stator wound in a three phase arrangement and an eight pole permanent magnet rotor in which the rotor pole pieces are unskewed and angularly displaced from equally 45.degree. spaced reference positions about the rotor by different amounts which are integral multiples of 1.875.degree.. The cogging frequency is eight times higher and the cogging torque are eighth that of a corresponding motor with a conventional permanent magnet rotor.
    Type: Grant
    Filed: June 20, 1986
    Date of Patent: December 15, 1987
    Assignee: 501 Aeroflex Laboratories, Incorporated
    Inventor: Myron Schwartz