Rotating electric machine control device

A rotating electric machine control device for driving a rotating electric machine that has plural winding groups for plural systems, the rotating electric machine control device comprising:

• a plurality of inverter units, each unit respectively provided for each winding group;
• and
• a control unit, including:
• an electric current controller controlling an electric current supplied to the plural winding groups;
• an overheat protection controller calculating an upper limit of the electric current supplied to the plural winding groups as a restricted current value;
• and
• an abnormality detector detecting abnormality of the plural winding groups and the plurality of inverter units, wherein
• the overheat protection controller includes:
• a temperature estimator (i) estimating a system temperature of a system that is provided as a set of a corresponding winding group and an inverter unit for each of the plural systems and (ii) estimating a shared component temperature of a shared component that is shared among the plural systems;
• and
• a restricted current calculator calculating the restricted current value based on the system temperature or the shared component temperature, and
• at least one of the system temperatures, the shared component temperature, and/or the restricted current values is changed from a value during an all-systems normal time when all of the plural systems operate without having abnormality, when at least one of the plural systems is abnormal, and a drive of the electric rotating machine is continued by using at least one of remaining systems that is functioning normally.