Electric power conversion systems – Current conversion – With means to selectively provide d.c. of either polarity
Patent
1992-08-17
1995-06-27
Dougherty, Thomas M.
Electric power conversion systems
Current conversion
With means to selectively provide d.c. of either polarity
H02P 100
Patent
active
054285224
ABSTRACT:
A four quadrant unipolar pulse width modulated (PWM) power conversion circuit for supplying a desired current to an inductive load uses an H-bridge circuit topology with an upper and lower pair of switching elements including a diode in parallel with each of the switching elements to provide a current path from the load to the power source when its respective switching element is non-conductive. A control algorithm generates switching element control signals to cause the instantaneous voltage across the load to alternate between a single polarity voltage and zero for a portion of the output load waveform to cause the average value of the load current to correspond generally with the desired average load current.
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Simple Switching Control Method Changes Power Converter Into A Current Source--Cecil W. Deisch, 1978. IEEE.
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Daboussi Zaher
Millner Alan
Mongeau Peter P.
Dougherty Thomas M.
Kaman Electromagnetics Corporation
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