AC rotating machine control device, AC rotating machine drive system and electric power steering system equipped with an AC rotating machine control device

摘要

According to the AC rotating machine control device, the AC rotating machine control method, and the AC rotating machine drive system provided with the AC rotating machine control device according to the present invention, the high frequency component corresponding to the high frequency signal input to itself is superimposed. AC high-frequency power is supplied to the AC rotary machine and the rotational position of the AC rotary machine is calculated based on the phase difference between the high-frequency signal and the output torque high-frequency included in the output torque of the AC rotary machine. The controller of the AC rotating machine that can estimate the rotational position of the AC rotating machine without being restricted by the rotational speed of the rotating machine, the presence or absence of electric saliency and the occurrence of magnetic saturation, An AC rotating machine drive system and an electric power steering system provided with a control device can be obtained.