Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries
Patent
1985-07-08
1987-04-07
Salce, Patrick R.
Electricity: battery or capacitor charging or discharging
Serially connected batteries or cells
With discharge of cells or batteries
320 21, 320 22, 363 75, 323306, 323309, H02J 704, G05F 306
Patent
active
046564128
ABSTRACT:
A battery charger for incorporation into an electric-powered vehicle is disclosed. The charger includes a ferroresonant voltage-regulating circuit for providing an output voltage proportional to the frequency of an input AC voltage. A high frequency converter converts a DC voltage supplied, for example, from a rectifier connected to a standard AC outlet, to a controlled frequency AC voltage which is supplied to the input of the ferroresonant circuit. The ferroresonant circuit includes an output, a saturable core transformer connected across the output, and a first linear inductor and a capacitor connected in series across the saturable core transformer and tuned to resonate at the third harmonic of the AC voltage from the high frequency converter. The ferroresonant circuit further includes a second linear inductor connected between the input of the ferroresonant circuit and the saturable core transformer. The output voltage from the ferroresonant circuit is rectified and applied across a pair of output terminals adapted to be connected to the battery to be charged. A feedback circuit compares the voltage across the output terminals with a reference voltage and controls the frequency of the AC voltage produced by the high frequency converter to maintain the voltage across the output terminals at a predetermined value. The second linear inductor provides a highly reactive load in the event of a fault across the output terminals to render the charger short-circuit proof.
REFERENCES:
patent: 3239750 (1966-03-01), Weber
patent: 4525774 (1985-06-01), Kino et al.
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"The Controlled Ferroresonant Transformer" by L. A. Finzi and Abrahim Lavi, published in the American Institute of Electrical Engineers (AIEE) Transactions for Jan. 1963 at pp. 414 to 419.
"High-Power Ferroresonant Voltage Regulating Transformers" by T. Wroblewski and A. Kusko, reprint of an article believed to be published in the IEEE Transactions for Apr. 1979 at pp. 371 to 375.
"Ferroresonant Transformer" by unknown author, presented at the IEEE Magnetic Society meeting at the California Institute of Technology, Pasadena, California in 1983 or 1984.
California Institute of Technology
Salce Patrick R.
Simpson Mark D.
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