| 摘要 |
<p>An AC to DC power converter comprises an input filter (2, 3) for filtering the alternating current input (1) and an output filter (11) for filtering and smoothing the direct current power output to a load (12). The output alternating current of the input filter (2, 3) is rectified by a rectifier (4) and electronically switched by buck and boost switching circuits (6-10) at a frequency much higher than the frequency of the alternating line current input. The rectified line current is sensed by a current sensor (5) and provided to a control circuit (21-43) which controls the operation of the buck and boost switching such that the power line current will follow a predetermined reference voltage waveform.</p> |
