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U.S. Department of Energy
Office of Scientific and Technical Information

Combination field chopper and battery charger

Patent ·
OSTI ID:864022
A power transistor used in a chopper circuit to control field excitation of a vehicle motor when in a power mode is also used to control charging current from an a-c to d-c rectifier to the vehicle battery when in a battery charging mode. Two isolating diodes and a small high frequency filter inductor are the only elements required in the chopper circuit to reconfigure the circuit for power or charging modes of operation.
Assignee:
United States of America as represented by United States (Washingon, DC)
Patent Number(s):
US 4292578
OSTI ID:
864022
Country of Publication:
United States
Language:
English