| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an EMI suspension circuit, which suppresses a common mode current generated from high-speed switching of a voltage-type electric power converter and can reduce power losses and effectively reduce the common mode current that flows in a grounding conductor. <P>SOLUTION: In an electric circuit comprising a power supply device 1, a voltage-type electric power converter 3 and a motor 4 as a load, a grounding conductor 9 is connected with a chassis of the voltage-type electric power converter 3 and is grounded via a primary/secondary Winding-Linked-Transformer (WLT) 10; a grounding conductor 11 is also connected with the frame of the motor 4 and is grounded via a WLT12 so that an EMI noise can be reduced by suppressing the common mode current, which flows in the grounding conductor, by a high-impedance WLT. <P>COPYRIGHT: (C)2010,JPO&INPIT |
