High frequency switching battery charger

Details High frequency switching battery charger High frequency switching battery charger

H - Electricity

02

J

320/9

H02J 7/10 (2006.01) H02J 7/02 (2006.01) H02M 3/335 (2006.01)

Patent

CA 1223304

HIGH FREQUENCY SWITCHING BATTERY CHARGER ABSTRACT OF THE DISCLOSURE A power supply for charging a storage battery includes a switching pulse width modulator for controlling the current flowing from an input rec- tifier to an output transformer. The input rec- tifier is convertable from a full-wave bridge to a voltage doubler for operation at two different line voltages. A current limiting circuit and a charging voltage control circuit are both respon- sive to sensed output current to closely match the output of the power supply to the charging capa- city of the battery. An overcurrent sensing cir- cuit protects the power supply and battery against the results of line transients and shorted battery cells. A sensing circuit detects the absence of a battery, and an end-of-charge sensing circuit detects full charge voltage. A latching circuit disables the power supply on detection of over- current, absence of a battery, or full charge voltage.

452202

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