Motor protector with remote temperature simulation

Details Motor protector with remote temperature simulation Motor protector with remote temperature simulation

1976-08-16

1978-06-27

Schaefer, Robert K.

Electricity: motive power systems

Automatic and/or with time-delay means

Responsive to thermal conditions

318221C, 318334, 318472, G05B 500

Patent

active

040977900

ABSTRACT:
To protect a motor from overheating, its temperature is simulated at a point remote from the motor and the motor voltage is controlled to prevent overheating. The simulator comprises a cube of copper carrying a pair of heating elements: one being heated by a current proportional to motor current and the other heated by a current proportional to motor power. A temperature detector on the cube detects temperature corresponding to critical motor temperatures and is used to control motor energization.

REFERENCES:
patent: 3629676 (1971-12-01), Ephraim, Jr. et al.
patent: 3691446 (1972-09-01), Ephraim, Jr. et al.
patent: 3809960 (1974-05-01), Jossic
patent: 3860861 (1975-01-01), Gucker

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