Drive controller and drive control method for electric motor

A drive controller, comprising:

• an electric motor equipped with a plurality of energization systems composed of an inverter and coils corresponding to a plurality of phases, the plurality of energization systems including at least a first energization system and a second energization system;
• a current detecting unit configured to detect currents between the coils and output points of the inverter or between the coils and a connection point between the coils, in each of the plurality of energization systems;
• and
• a microcomputer configured to obtain a detection value of a current from the current detecting unit and output a control signal of the inverter to each of the plurality of energization systems, the microcomputer being configured to
• control, when abnormal energization occurs in the first energization system, the inverter of the first energization system into a predetermined condition;
• and
• detect a torque generated in the first energization system based on a current in the first energization system detected by the current detecting unit;
• and
• control at least the inverter of the second energization system based on the torque generated in the first energization system.