| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a boost charger that is highly efficient with decreased frequencies of semiconductor passages despite its small ac input capacity and can be applied to a single phase ac power supply. <P>SOLUTION: The boost charger includes a low-speed charging part 4 and a high-speed charging part 6. The high-speed charging part 6 has a two-phase step-up chopper circuit or a two-phase step-down chopper circuit, and the low-speed charging part 4 has a transformer 401 connected to an AC power supply 3, an AC input bridge converter 201 connected to the secondary side of the transformer, and a battery 5 connected to the AC input bridge converter 201. The transformer 401 is adjusted so that a peak value of the AC voltage on the secondary side of the transformer becomes less than or equal to the voltage of the battery 5. The battery 5 is charged by boosting the voltage by the AC input bridge converter 201 by current control of high power factor, and with this charge voltage, the battery of a load is charged rapidly through the two phase step-up chopper circuit or step-down chopper circuit of the high-speed charging part 6. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
