POWER CONVERTING APPARATUS FOR AN ELECTRIC CAR

摘要

To disclose a power converting apparatus for an electric vehicle including a power converter 2 that has switching elements Gu to Gz and drives a synchronous machine 1, an opening/closing unit 4, current detectors 3a to 3c, and a controller 6 that controls ON/OFF of the switching elements Gu to Gz and opening/closing of the opening/closing unit 4 based on currents detected by the current detectors 3a to 3c. The controller 6 including a fault detector 9 that detects whether any of the switching elements Gu to Gz has a short-circuit fault and outputs a signal indicating a detection result, an ON/OFF controller 7 that sets one of the switching elements that constitute a phase (a V phase or a W phase) other than a first phase (for example, a U phase) that involves the short-circuit fault to an ON operation state and outputs a signal for opening the opening/closing unit 4, and an opening/closing controller 8 that opens a V-phase opening/closing unit 4b connected to a third phase (for example, the V phase) other than the first phase and the second phase in which one of the switching elements (for example, the W phase) is set to the ON operation state by the ON/OFF controller 7.