To suppress that accuracy of torque control of an electric motor is deteriorated due to an axial error in a power steering device having the electric motor which gives steering force to a steering mechanism.SOLUTION: A controller estimates a control phase which is a phase of induction voltage to be generated in an electric motor on the basis of a value of current flowing to the electric motor, calculates an axial error which is difference between an actual axial phase which is an output signal of a rotational position sensor and the control phase, corrects electric angular velocity which is angular velocity of the actual axial phase on the basis of the axial error, and calculates a command signal to be output to a stator of the electric motor on the basis of the electric angular velocity.SELECTED DRAWING: Figure 4
【課題】操舵機構に操舵力を付与する電動モータを有するパワーステアリング装置において、軸誤差によって電動モータのトルク制御の精度が低下することを抑制する。【解決手段】制御装置は、電動モータに流れる電流値に基づき電動モータに発生する誘起電圧の位相である制御位相を推定し、回転位置センサの出力信号である実軸位相と制御位相の差である軸誤差を演算し、軸誤差に基づき実軸位相の角速度である電気角速度を補正し、電気角速度に基づき電動モータのステータに出力する指令信号を演算する。【選択図】図4
CONTROLLER OF POWER STEERING DEVICE
パワーステアリング装置の制御装置
2019-03-28
Patent
Electronic Resource
Japanese
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