| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a power converter having a function of protecting a switching element that does not reduce the level of a voltage control signal applied to a control terminal of the switching element and also suppresses variations when the switching element for power conversion is protected from an abnormal current. <P>SOLUTION: The power converter 1 having a pair of main terminals and a control terminal for controlling a current flowing through the pair of main terminals, includes: switching elements 134 to 139 for power conversion, in which each low potential side terminal of the main terminals is connected to a low potential side; a current detection circuit 4 that detects a main current flowing through the pair of main terminals; a main capacitor 5 positioned between the control terminal and the low potential side; and a switching element 6 for protection, which performs a switching operation so that the main capacitor 5 is electrically connected between the control terminal and the low potential side when the main current detected by the current detection circuit 4 exceeds a predetermined value of the switching elements 134 to 139. <P>COPYRIGHT: (C)2009,JPO&INPIT |
