Circuit for controlling rotational direction and rotational spee

Details Circuit for controlling rotational direction and rotational spee Circuit for controlling rotational direction and rotational spee

1989-06-22

1990-07-17

Shoop, Jr., William M.

Electricity: motive power systems

Motor-reversing

318293, H02F 100

Patent

active

049423460

ABSTRACT:
A motor is connected in series with a power supply through a reversing device for reversing the direction of rotation of the motor and a speed control circuit. The reversing device includes two switches normally in a standby position in which the supply circuit of the motor is open. A command device is capable of alternatively and temporarily switching the switches into an operating position, for starting the motor in the respective opposite directions of rotation, when it receives a signal to do so from detector elements which generate the signal only when they detect a condition of normal operation of the control device of the motor.

REFERENCES:
patent: 3586949 (1968-05-01), Spear
patent: 4250435 (1981-02-01), Alley et al.
patent: 4329630 (1982-05-01), Park
patent: 4468546 (1984-08-01), Kinzl et al.
patent: 4481786 (1984-11-01), Bashark
patent: 4680515 (1987-07-01), Crook
patent: 4748388 (1988-05-01), Muller
patent: 4749927 (1988-07-01), Rodal et al.

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