| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a load driving device for realizing high efficiency and a high power factor with an inexpensive and simple circuit structure. <P>SOLUTION: A load driving device 1 includes: a first series circuit consisting of first and second switch elements Q1 and Q2; a second series circuit consisting of third and fourth switch elements Q3 and Q4; a third series circuit consisting of first and second capacitors C1 and C2, which are connected in parallel; an AC power supply Vac and a boosting inductor L, which are connected in series between an intermediate point of the first series circuit and an intermediate point of the third series circuit; a high frequency transformer T connected between an intermediate point of the second series circuit and one end on a fourth switch element Q4-side of the second series circuit; and control means driving and controlling the first to fourth switch elements Q1 to Q4. The first series circuit, the third series circuit and the boosting inductor L are served as rectification means and boosting means to constitute them, and the second series circuit constitutes an inverter circuit. <P>COPYRIGHT: (C)2012,JPO&INPIT |
