Method and apparatus for handling brake failure in variable freq

Details Method and apparatus for handling brake failure in variable freq Method and apparatus for handling brake failure in variable freq

1998-08-03

2000-08-01

Ro, Bentsu

Electricity: motive power systems

Braking

Friction braking

318463, 318563, 318565, 318371, 388903, 188162, H02H 708, B66D 500

Patent

active

060971657

ABSTRACT:
The variable frequency drive of a motor monitors pulse generator feedback while the motor is stopped and an electromechanical brake is set. When the pulse generator feedback exceeds a predetermined level indicative of brake failure, tie controller actuates the motor to operate in zero servo mode and maintain the load. An alarm is also sounded, allowing an operator to safely lower the load.

REFERENCES:
patent: 4304375 (1981-12-01), Builta et al.
patent: 5671912 (1997-09-01), Langford et al.

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