Electricity: motive power systems – Induction motor systems – Primary circuit control
Patent
1996-05-10
2000-02-29
Masih, Karen
Electricity: motive power systems
Induction motor systems
Primary circuit control
318140, 318148, 318461, 318254, 307 38, 307 31, 361 20, 361 21, 361 91, 361 58, 322 75, 322 80, 322 83, H02P 528
Patent
active
060313528
ABSTRACT:
A control apparatus controlling the operation of pulse width modulator for an electric clutch or electric motor in portable spray painting equipment having a pressure transducer for sensing the pressure, a manually adjustable pressure reference, a comparator type error detector, and a pressure deadband control for inserting a deadband in a pressure control loop with the deadband varying as the pressure reference varies. A fixed deadband is provided below a predetermined low pressure setting to avoid excessive cycling of the control apparatus during low pressure operation. The pulse width modulator control circuit includes compensation for improving input power factor. The clutch control includes an active alternative load circuit switched in when the alternator output voltage is above a predetermined value.
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Masih Karen
Wagner Spray Tech Corporation
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