| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a structure where a resistor can securely be melted when an abnormal current occurs in an inverter circuit even if an inexpensive resistor is used in a control circuit of a motor, where the resistor is connected to a high potential side of the inverter circuit having a plurality of switching elements and a shunt resistor is connected to a low potential side of the inverter circuit. <P>SOLUTION: A bypass circuit 16 bypassing the shunt resistor 14 is arranged so that the abnormal current is suppressed to flow in the shunt resistor 14 connected to the low potential side (negative pole side of DC power supply 2) in the inverter circuit 11 when an abnormal current not less than a prescribed value occurs in the inverter circuit 11. <P>COPYRIGHT: (C)2010,JPO&INPIT |
