2021-03-252021-03-252019-04-02http://hdl.handle.net/10919/102840The present invention provides a battery charger and battery charging method controlled with a charging waveform input of an AC-DC switching circuit to a DC link and a DC-DC stage converter for outputting a regulated DC voltage. The method determining the charging waveform comprising the steps of selecting a Pulse Width Modulation (PWM) zero-off charging waveform signal input to the AC-DC switching circuit and calculating a ripple power at the DC link based on the signal input power and output power of the regulated DC voltage output.application/pdfenPatenthttp://pimg-fpiw.uspto.gov/fdd/53/500/102/0.pdf14971611H02J7/00H02J7/02H02J7/022H02M7/797H02J2207/2010250053