| 摘要 |
A battery charger includes line-level input rectification, a high- frequency oscillator-controlled chopper circuit, multiple transformers operating in parallel, and controlled output rectification. Ilse of line-lev el input rectification reorders the elements of the battery charger compared to previous designs. A chopper frequency several orders of magnitude higher than that of the AC power mains is used. The use of multiple, parallel-wired transformers for voltage and current transformation eases constraints on the physical geometry of a manufactured battery charger product by permitting individual transformers, each smaller than a comparable single transformer, to be employed. Controlled output rectifiers permit power levels to be regulate d dynamically.
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