Energy efficient motor brake

Details Energy efficient motor brake Energy efficient motor brake

1995-06-26

1996-11-26

Butler, Douglas C.

Brakes

Operators

Spring

188164, B60T 1304

Patent

active

055775780

ABSTRACT:
A pulsed brake drive for an electro-magnetic brake incorporating a permanent magnet which can be pulsed into either an on or off stable state wherein the brake is driven by a very short pulse depending on brake voltage. In the event of a failure of any one phase of the line the drive shuts off the motor and applies the brake. Further, if the power supply to the motor is off, the brake, which is normally on, can be released and then re-applied by a pushbutton. Power to drive the brake is battery supplied which in turn is kept fully charged at all times from main AC power. It is this unique circuitry and combination which introduces an energy efficient motor brake driven by a short pulse-not dependent on continuous voltage.

REFERENCES:
patent: 2421757 (1947-06-01), Oetzel
patent: 3730317 (1973-05-01), Jaeschke
patent: 4966255 (1990-10-01), Fossum
patent: 5185542 (1993-02-01), Lazorchak
patent: 5186286 (1993-02-01), Lindberg

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