| 摘要 |
PROBLEM TO BE SOLVED: To improve total conversion efficiency of a device while having respective functions of a rectifying circuit, a PFC circuit, and a DC/DC conversion circuit.SOLUTION: Control means in an electric power conversion device according to an embodiment supplies a first switch to a fourth switch with switching signals for opening and closing a pair of the first switch and fourth switch and a pair of a second switch and a third switch alternately so as to supply an AC power supply current synchronized with an AC power supply voltage based upon a detection value of the AC power supply voltage, a detection value of the AC power supply current, and a detection value of a capacitor voltage and also to eliminate a deviation from an output voltage command value based upon a detection value of an output voltage. Signal generation means in the control means determines a switching frequency based upon the detection value of the output voltage so as to eliminate a deviation from an output voltage command value, and generates a switching signal corresponding to the switching frequency.SELECTED DRAWING: Figure 1 |
