| 摘要 |
When one of six FETs 31 has short-circuit faulted, a controllable region identification unit 41 stops driving of an electric motor 18, and then performs processes for determining whether a short-circuit fault has occurred, and when a short-circuit fault has occurred, for identifying the position of the FET that has short-circuit faulted based on phase voltages (induced voltages) V U , V V , and V W of phases. When the position of the FET that has short-circuit faulted is identified, the controllable region identification unit 41 performs a controllable region identification process. In detail, the controllable region identification unit 41 identifies a "possible region," an "indeterminate region," and a "impossible region" based on phase voltages V U , V V , and V W of the phases. |
