Patent ID: 8829863

Claim:
A field winding type rotary electric machine, comprising: a controller; a field current integration portion that is provided in the controller and calculates an integral value by integrating an excessive field current exceeding a field current threshold; a field current limiting portion that is provided in the controller and carries out limiting processing to limit a field current to or below a predetermined value when the integral value calculated by the field current integration portion reaches an integral value threshold defined as a reference value at or above which the field current is limited; a controller power supply connection switch that is switched ON and OFF for power feeding to the controller; and a controller power supply connection determination portion that switches ON and OFF the controller power supply connection switch and that maintains an ON state of the power feeding to the controller from start to end of the limiting processing by the field current limiting portion when the controller power supply connection determination portion receives a signal to switch OFF the controller power supply connection switch during the limiting processing.