Motor overload detection with predetermined rotation reversal

Details Motor overload detection with predetermined rotation reversal Motor overload detection with predetermined rotation reversal

1989-05-19

1990-06-12

Jennings, Derek S.

Electricity: electrical systems and devices

Safety and protection of systems and devices

Motor protective condition responsive circuits

361 55, H02H 500

Patent

active

049338005

ABSTRACT:
An apparatus is provided for controlling an electric motor that is doing some sort of work, whereby the apparatus automatically senses the presence of a work overload. Once the work overload is sensed, the apparatus automatically reverses the direction of rotation of the motor to eliminate the work overload. The reversed rotation is limited to either a predetermined period of time or to a predetermined number of reverse rotations. Once the predetermined limit of reverse rotation is reached, the apparatus automatically resumes normal rotation of the motor.

REFERENCES:
patent: 4412162 (1983-10-01), Hitamura

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