| 摘要 |
PROBLEM TO BE SOLVED: To reduce the common mode noise of a power converter. SOLUTION: In a control circuit 41 for controlling the main circuit of a two-level inverter 4a, the common mode noise is calculated on the basis of a switching pattern for controlling the gate of the semiconductor element of the main circuit, a noise reduction circuit 6a input by the calculated result outputs Ic so as to cancel a common mode noise current I0 flowed from an electrostatic capacity C2 to be reduced so that a common mode noise current Ie is substantially zero. |
