Method and apparatus for controlling the supply of power to an i

Details Method and apparatus for controlling the supply of power to an i Method and apparatus for controlling the supply of power to an i

1992-07-27

1993-08-31

Wysocki, Jonathan

Electricity: motive power systems

Induction motor systems

Primary circuit control

318729, H02P 700

Patent

active

052412563

ABSTRACT:
An energy-saving induction motor control apparatus maintains the operation of a motor at an optimum power factor irrespective of changes in motor load, by generating a power factor compensation value which is varied in accordance with the motor supply voltage. The motor supply voltage is controlled such as to reduce any difference between the optimum power factor value and a measured power factor value, thereby ensuring that stable operation with minimum energy consumption are achieved over a wide range of motor load values.

REFERENCES:
patent: 4266177 (1981-05-01), Nola
patent: 4355274 (1982-10-01), Bourbeau
patent: 4356440 (1982-10-01), Curtiss et al.
patent: 4704570 (1987-11-01), Hopkins

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