| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress discharge by auxiliary equipment when a need of lowering output voltage from a DC/DC converter arises due to actuation of a specific auxiliary equipment load, etc. <P>SOLUTION: The DC/DC converter 100 outputs an output voltage Vdc generated by converting an AC voltage from a first secondary coil 102 of a transformer Tr into a DC voltage through a conversion circuit 105, to a point between power wiring AMD and a ground node G1. The power wiring AMD is connected to power wiring for an auxiliary equipment load and to a positive terminal 21 of an auxiliary battery 20. The output voltage Vdc from the DC/DC converter 100 is lowered in response to actuation of the specific auxiliary equipment load. In a normal condition, a switch circuit 125 connects a negative terminal 22 of the auxiliary battery 20 to the ground node G1. When the output voltage Vdc is lowered, the switch circuit 125 connects the negative terminal 22 to a second secondary coil 103 of the transformer Tr, thereby charges the auxiliary battery 20 with a voltage higher than the output voltage Vdc. <P>COPYRIGHT: (C)2012,JPO&INPIT |
