| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a protected power conversion device, capable of automatically interrupting a large current when it flows and executing DC-AC conversion using a full-bridge MERS (magnetic energy recovery switch), and to provide a control method. <P>SOLUTION: The protected power conversion device 1 is composed of a full-bridge MERS 100, a control circuit 200, and an ammeter 300, and is connected between a DC power supply 2 and an inductive load 3. The ammeter 300 measures a current value supplied to the inductive load 3. The control circuit 200 switches four reverse conducting semiconductor switches SW1-SW4 configuring the full-bridge MERS 100, thereby converting the power outputted from the DC power supply 2 to AC power and supplying the converted AC power to the inductive load 3. Further, if a large current flows due to a short-circuit failure of the inductive load 3 and the ammeter 300 detects a current value not less than a predetermined value, the control circuit 200 turns off all the reverse-conducting semiconductor switches SW1-SW4 to interrupt the current. <P>COPYRIGHT: (C)2011,JPO&INPIT |
