Power conversion device

• Main Authors: MIURA TOSHIEI, KURATA GEN
• Format: Patent
• Language: Chinese; English
• Published: 09.11.2011
• Subjects: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC,OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWERSUPPLY SYSTEMS; CONTROL OR REGULATION THEREOF; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUTPOWER; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRICITY; GENERATION

In a resonance-type induction heating device performing operation via delaying motions, when a load abnormity, etc. becomes an advanced motion, a diode of an inverter circuit is made to perform reverse recovery and be destroyed. The invention provides a power conversion device, which is provided with a voltage detecting circuit detecting voltages among main terminals of a semiconductor element, a voltage comparing circuit comparing a voltage setting value and a voltage detecting value, when the semiconductor element is cut off, the voltage setting value and the voltage detecting value are compared, when the voltage setting value is larger, the semiconductor element is in a serial connection, and the semiconductor element is not turned on to construct upper-lower relative arms.