| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a charger capable of highly efficiently charging an electrical storage device mounted in an electric vehicle by power from an external power source. <P>SOLUTION: An AC-DC converter 250 converts an AC voltage vac from an external power source 500 into a DC voltage higher than a peak voltage of the AC voltage and outputs the voltage to a first power source line PL1. In a normal control mode, a DC-DC converter 210 steps down the voltage of the power source line PL1 by ON/OFF control of a switching device Q1 to charge a main battery 10. In an upper arm ON control mode, the DC-DC converter 210 fixes the switching device Q1 to ON to charge the main battery 10. On the basis of an external charging state, a controller 300 applies upper arm ON control when a condition for applying the upper arm ON control is satisfied, and applies the normal control mode when the condition is not satisfied. <P>COPYRIGHT: (C)2012,JPO&INPIT |
