Electricity: motive power systems – Induction motor systems – Power-factor control
Patent
1993-12-08
1995-02-14
Ro, Bentsu
Electricity: motive power systems
Induction motor systems
Power-factor control
330110, 327260, G06G 7186, H02P 736
Patent
active
053898699
ABSTRACT:
A power factor control system for an A.C. induction motor determines the difference in phase between the voltage applied to the motor and the current drawn by the motor. Based upon this difference in phase, an integrator generates an error signal. The error signal is compared with a ramp wave to derive a pulse signal which controls the voltage applied to the motor, which in turn controls the amount of current supplied to the motor, in order to reduce the power consumed by the motor. The integrator includes a dual-path feedback filter having a polarized capacitor in each path. A power supply is used to quickly provide the full operating bias voltages required by several of the components contained in the control system.
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Energy Consortium, Inc.
Ro Bentsu
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