| 摘要 |
<P>PROBLEM TO BE SOLVED: To precisely detect a short circuit failure of a switching element by avoiding employing such a time when a ringing noise occurs as a timing for detecting a voltage used for detecting a short circuit failure of a switching element, relating to a short circuit failure detecting device for an inverter and a motor control device. <P>SOLUTION: The short circuit failure detecting device for an inverter detects a short circuit failure of the switching element in an inverter circuit that contains two switching elements connected in series between a power source and a ground. A voltage between both terminals that occurs at both terminals of one switching element, among two switching elements, when a control signal inputted for driving one switching element of the two switching elements is switched from on to off is monitored. If the voltage between both terminals that is monitored is a predetermined threshold value or higher, it is determined that a short circuit failure has occurred at the other switching element in the two switching elements. <P>COPYRIGHT: (C)2013,JPO&INPIT |
