| 摘要 |
<p>A power conversion system including, a series circuit of an upper arm and a lower arm connected between a positive terminal and a negative terminal of a DC power source. Each of the upper and lower arms is composed of a power device having a large dv/dt withstand value and a first snubber circuit connected in parallel with the power device. Each of the first snubber circuits is composed of at least a first capacitor having a fixed capacitance. The power conversion system further includes two second snubber circuits, each composed of a series circuit of a second diode and a second capacitor, connected in parallel with one of the upper and lower arms, and a second resistor connected between a connecting point of the second diode and the second capacitor and one of the negative and positive terminals of the DC power source, respectively. <IMAGE></p> |
