Patents Assigned to Tulin Corporation
  • Stepper motor damping circuit and a method therefor
    Patent number: 4510429
    Abstract: A control circuit for a stepper motor is disclosed. The stepper motor is driven by a chopper drive circuit. The frequency and the duty cycle of the stator or motor winding to which the chopper drive circuit has supplied the current is measured. The frequency and duty cycle measured are related to the back EMF induced in the driven stator. The back EMF is filtered and is used in a negative feedback manner and is supplied to the quadrature phase of the stepper motor to provide a damped step response.
    Type: Grant
    Filed: August 19, 1983
    Date of Patent: April 9, 1985
    Assignee: Tulin Corporation
    Inventor: John S. Squire