Honda Motor Co., Ltd.

Somei Nakatomi

Hiroshi Otsuka

Mitsuaki Hirakawa

Satoyoshi Oya

Yasuto Watanabe

Yasuhisa Kume

Takahiro Hagimoto

Tomoaki Ono

Mitsuhiro Takeda

Keigo Andoh

Katsuya Inoue

To provide a system of low cost and low loss capable of the supply of electric power according to characteristics of each of a plurality of motors from a single battery. A power supply system for a vehicle of the present invention includes: a high-voltage battery; a first inverter which connects with the high-voltage battery; a motor described later which connects with the first inverter; a high-voltage DCDC converter which is connected to the high-voltage battery and steps down the voltage of the high-voltage battery; a second inverter which connects with the high-voltage battery; and a motor described later which connects with the second inverter.

Power supply system for vehicle

A DC-DC converter includes first and second capacitors connected in series, a switching part, and a control circuit part which includes a voltage difference calculating part for calculating a difference between voltages of the first and second capacitors, a duty ratio controller for controlling duty ratio of on- and OFF-durations to decrease the voltage difference of the first and second capacitors on the basis of the calculated difference. A power supplying system including the DC-DC converter controls balance between first and second capacitors in voltage on the basis of the powering/regenerating discriminating signal.

DC-DC converter and power supplying system using a DC-DC converter

Growing community of inventors

Wako, Japan

Somei Nakatomi