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发明授权
CN106105005B 电力变换装置 有权

电力变换装置
摘要：
通过抵消经由寄生电容和接地点循环的泄漏电流，来降低各种电力变换装置中的噪声端子电压。具备用于抑制将开关元件(50，51)之间彼此相连接的A点和双向开关(54)内的B点的电位变动的、包括第一、第二接地电容器(44，45)和电抗器(62)的电位变动抑制部。该电位变动抑制部利用经由电抗器(62)和接地电容器(44)流动的第一补偿电流，来抵消由于交流电压的正负极性下的A点的电位变动而流动的第一泄漏电流，从而抑制A点的电位变动，并且，利用经由电抗器(62)、开关(8)以及接地电容器(45)流动的第二补偿电流，来抵消由于交流电压的负极性下的B点的电位变动而流动的第二泄漏电流，从而抑制B点的电位变动。
摘要（英）：

A power conversion device includes a potential variation suppression portion having first and second ground capacitors and a reactor, for suppressing a potential variations at an A point at which switching elements and are connected together and at a B point in a bidirectional switch. The potential variation suppression portion suppresses potential variation at the A point by cancelling a first leakage current, which flows due to the potential variation at the A point at the positive and negative polarities of an alternating current voltage, with a first compensating current flowing via the reactor and ground capacitor, and suppresses the potential variation at the B point by cancelling a second leakage current, which flows due to the potential variation at the B point at the negative polarity of the alternating current voltage, with a second compensating current flowing via the reactor, a switch, and the second ground capacitor.

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