Electric-rotating-machine control apparatus

An electric-rotating-machine control apparatus comprising:

• an electric-power conversion circuit having two or more legs in each of which there are provided a positive-polarity switching device connected with a positive electrode of a DC power source, a negative-polarity switching device connected with a negative electrode of the DC power source, and an external connection point at which the positive-polarity switching device and the negative-polarity switching device are connected in series with each other and that is connected with an electric rotating machine;
• a capacitor connected with the positive electrode and the negative electrode of the electric-power conversion circuit;
• a voltage sensor for detecting a voltage between the positive electrode and the negative electrode of the electric-power conversion circuit;
• a temperature sensor for detecting a temperature of the electric-power conversion circuit;
• and
• a controller for on/off-controlling the switching devices in the electric-power conversion circuit,
• wherein in the case where a voltage detected by the voltage sensor is higher than a determination voltage calculated based on a temperature detected by the temperature sensor, the controller performs protective control in which all the switching devices are turned off, all the positive-polarity switching devices are turned on and all the negative-polarity switching devices are turned off, or all the positive-polarity switching devices are turned off and all the negative-polarity switching devices are turned on.