Rotary electrical machine control device

A rotary electric machine control device that controls a rotary electric machine drive device including an inverter interposed between a DC power source section including a power storage device and an AC rotary electric machine to perform power conversion between DC power from the DC power source section and AC power for the rotary electric machine, the rotary electric machine control device comprising:

• an inverter control section that controls the inverter by controlling an armature current in a two-axis orthogonal coordinate system that rotates in synchronization with rotation of the rotary electric machine, the armature current being a vector obtained by synthesizing a field current and a drive current extending along respective axes of the orthogonal coordinate system, wherein
• the inverter control section determines whether connection between the DC power source section and the inverter is in a blocked state, and if it is determined that the connection is in the blocked state, the inverter control section executes zero-torque control in which the inverter is controlled such that torque regenerated by the rotary electric machine becomes zero, and executes high-loss control in which the field current is varied so as to increase the armature current while maintaining a torque command provided in the zero-torque control.