Rotating electric machine driver and electric power steering device

An electric power steering apparatus comprising:

• a rotating electric machine driver apparatus that outputs an assisting torque for assisting a steering operation of a driver, the rotating electric machine driver apparatus includes
• an inverter section having an upper arm element and a lower arm element respectively corresponding to each of plural phases of a winding wire of a rotating electric machine, the upper arm element disposed on a high voltage side of the upper arm element and the lower arm element disposed on a low voltage side of the upper arm element,
• an electric current detector detecting an electric current supplied to the winding wire,
• a controller section (i) obtaining a detected current value detected by the electric current detector and (ii) generating a high-side instruction signal and a low-side instruction signal respectively and switching an ON-OFF of the upper arm element and the lower arm element based on the detected current value, and
• an abnormality detector determining a simul-OFF abnormality in which a high-side and low-side instruction signal pair for an upper arm and lower arm element pair simultaneously becomes an OFF instruction based on continued switching-OFF of the high-side and low-side instruction signal pair continuing for at least a simul-OFF abnormality determination time.