| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a precharge circuit which can perform effective precharging operation by a simple configuration. <P>SOLUTION: At the powering-on of a power supply or the like, a switching circuit 21 precharges a power supply stabilization capacitor 3 by using a battery 1 via a precharge path 51. After the completion of the precharging, power is fed to an inverter 41 and a motor 42 from the battery 1 via a power feeding passage 52. Then, a switching circuit 22 switches the precharge path 51 and the power feeding passage 52. A power loss in the precharge circuit can largely be suppressed compared with a conventional art by the switching operation of the switching circuit 21. By this, heat generation caused by the power loss and a potential difference between an input voltage and an output voltage can be suppressed. <P>COPYRIGHT: (C)2008,JPO&INPIT |
