ApplicationNo. 06/251728 filed on 04/07/1981
US Classes:318/255, PLURAL DIVERSE MOTOR CONTROLS318/379Locally closed armature circuit
ExaminersPrimary: Truhe, J. V.
Assistant: Evans, A.
Attorney, Agent or Firm
International ClassesH02P 29/00 (20060101)
H02P 3/06 (20060101)
H02P 3/12 (20060101)
Foreign Application Priority Data1980-04-15 JP
AbstractA motor control apparatus which includes a pulse generator for providing a first signal for specifying the operational condition of a motor, and a motor driver for providing a second signal for driving the motor when the first signal is at a first level and providing a second signal when the first signal is at a second level. The motor control apparatus further includes a comparator, which compares the back electromotive force of the motor with a reference level when the first signal is at the second level and providing a third signal when the back electromotive force is within a given level range prescribed by the reference level. A switch circuit closes a circuit path through which a back electromotive force current produced by the back electromotive force flows when the second and third signals are provided, thereby applying electromagnetic braking with respect to the rotation of the motor.
Field of SearchPLURAL DIVERSE MOTOR CONTROLS
Stopping upon predetermined movement of or position of motor or driven device
Speed, acceleration, movement or position of motor or driven device
Locally closed armature circuit
Plural sensing means for determining plural positions or plural limits-of travel
Movement, position, or limit-of-travel