| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a common mode noise reducing device capable of reducing a common mode current flowing to the power supply side. <P>SOLUTION: The common mode noise reducing device 4 includes a voltage detecting means 7 that detects common mode voltage and outputs a voltage corresponding to the common mode voltage, a Y capacitor 8 formed by Y-connecting a pair of power supply lines 5a, 5b between a power supply 1 and an inverter 2 and the beginning of an intermediate ground wire 8c whose end is grounded respectively through capacitor elements 8a, 8b, and a Y capacitor drive circuit 9 that is placed on the intermediate ground wire 8c and passes a current for canceling out a common mode current flowing to the power supply 1 side through the Y capacitor 8 based on the output voltage of the voltage detecting means 7. <P>COPYRIGHT: (C)2011,JPO&INPIT |
