Battery charging system

摘要

In one aspect of the present invention, a battery charging system has a first rectifier adapted for converting an AC voltage at an input thereof to a first DC voltage at an output thereof; a power factor correction (PFC) circuit coupled to the first rectifier, for correcting the power factor of the battery charging system and outputting a second DC voltage; a first power converter coupled to the PFC circuit, for converting the second DC voltage to a third DC voltage; a second power converter coupled to the first power converter, for converting the third DC voltage to a fourth DC voltage to be delivered to a battery; and a first controller adapted for sensing the fourth DC voltage at the output of the second power converter for regulating the second power converter to maintain the fourth DC voltage at a predetermined value.

主权项

1. A battery charging system, comprising:
(a) a first rectifier adapted for converting an AC voltage at an input thereof to a first DC voltage at an output thereof; (b) a power factor correction (PFC) circuit having an input and an output, the input being coupled to the output of the first rectifier, wherein the PFC circuit is adapted for correcting the power factor of the battery charging system and outputting a second DC voltage at the output thereof; (c) a first power converter having an input and an output, the input being coupled to the output of the PFC circuit, wherein the first power converter is adapted for converting the second DC voltage to a third DC voltage at the output thereof; (d) a second power converter having an input and an output, the input being coupled to the output of the first power converter, wherein the second power converter is adapted for converting the third DC voltage to a fourth DC voltage at the output thereof to be delivered to a battery; and (e) a first controller adapted for sensing the fourth DC voltage at the output of the second power converter for regulating the second power converter to maintain the fourth DC voltage at a predetermined value;
wherein one of the first power converter and the second power converter is an isolated converter.