Device and method for detecting unbalanced condition in a load d

Details Device and method for detecting unbalanced condition in a load d Device and method for detecting unbalanced condition in a load d

1995-10-20

1997-10-14

Wysocki, Jonathan

Electricity: motive power systems

Limitation of motor load, current, torque or force

361 31, H02P 300

Patent

active

056776063

ABSTRACT:
A method and device for detecting an out-of-balance condition of a load which is driven by a motor is disclosed. A present instantaneous value of a current of a motor which is driving a load is detected and an average value of the detected instantaneous value over time is established. The present instantaneous value is compared to the established average value, and the number of times which the instantaneous value differs from the average value by at least a prescribed amount is counted. If this number exceeds a certain number, it is determined that the load which the motor is driving is out of balance.

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patent: 4935685 (1990-06-01), Justus et al.
patent: 5057962 (1991-10-01), Alley et al.
patent: 5309075 (1994-05-01), Yokoe et al.

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