high-frequency battery-charger


Posted on Oct 21, 2012

The waveforms in Figure 1 illustrate good and bad power-factor conditions. Trace A, at the top of the figure, is the voltage common to the current waveforms below. Trace B is an ideal current, in phase, with a 1.0 power factor and delivering peak current of 7.07A.



The waveforms in traces C, D, and E, result in poor power factors of 0.80. Trace C shows how switch-mode equipment can create very high-peak currents13.26A in this caseeven though the waveform is in phase with the voltage. Trace D show a l




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