Sanken Electric Co., Ltd.

Shimane University

Nagoya University

Takahiro Kawashima

Hideki Asuke

Masayoshi Yamamoto

Hideharu Takano

Mamoru Tsuruya

Shigeyuki Funabiki

Hiromitsu Terui

Masashi Ochiai

A bidirectional DC-DC converter includes a series circuit of a first winding of a first reactor, a second reactor, and a first switch connected to both ends of a first DC power source, a series circuit of a second switch and a second DC power source connected to both ends of the first switch, a series circuit of a second winding of the first reactor, a third reactor, a first selector switch, and a first diode connected to both ends of a series circuit of the second reactor and the first switch, a series circuit of a second selector switch, a second diode, and the second DC power source connected to both ends of a series circuit of the first selector switch and first diode, and a controller turning on/off the switches and the selector switches.

Bidirectional DC-DC converter

In order to achieve an object to reduce a surge voltage and suppress noise generation, the present invention provides a DC-DC converter with a snubber circuit, which boosts a voltage Vi of a DC power supply. The snubber circuit includes: a series circuit connected to both ends of a smoothing capacitor Co and including a snubber capacitor Cs and a snubber resistor Rs; a snubber diode Dsconnected to a node at which the snubber capacitor Cs and the snubber resistor Rs are connected, and to a node at which a reactor Lrand an additional windingof a transformer Tare connected; and a snubber diode Dsconnected to the node at which the snubber capacitor Cs and the snubber resistor Rs are connected, and to a node at which a reactor Lrand an additional windingof a transformer Tare connected.

DC-DC converter with snubber circuit

The present invention provides a DC-DC converter including a first series circuit connected to both ends of a first switch and formed of a winding of a first transformer, a first reactor, a first diode, and a smoothing capacitor, a second diode connected to a connection point of a primary winding of the first transformer, the winding of the first transformer and the first switch, and to one end of the smoothing capacitor, a second series circuit connected to both ends of a second switch and formed of a winding of a second transformer, a second reactor, a third diode, and the smoothing capacitor, a fourth diode connected to a connection point of a primary winding of the second transformer, the winding of the second transformer and the second switch, and to the one end of the smoothing capacitor, a third reactor connected to both ends of a series circuit of a secondary winding of the first transformer and a secondary winding of the second transformer, and a control circuit which alternately turns on the first switch and the second switch every &#xbd; cycle, turns off the first switch during an on-period of the second switch, and turns off the second switch during an on-period of the first switch.

DC-DC converter

Growing community of inventors

Matsue, Japan

Takahiro Kawashima