An ECU (11) that controls a motor (12) includes: a target current value setting unit (30) setting a target current (It); a voltage detecting unit (50) detecting a detected voltage (Vd) on the basis of a detection signal from a voltage sensor (23); a voltage calculation unit (51) calculating an estimated voltage (Ve) on the basis of a power supply voltage (Vps) of a battery (24); and an induced voltage observer (38) calculating an induced voltage (E) generated at the motor (12) using an inter-terminal voltage (Vt) based on the estimated voltage (Ve) when the target current (It) is set to a value other than zero; whereas the induced voltage observer (38) calculates the induced voltage (E) using an inter-terminal voltage (Vt) based on the detected voltage (Vd) when the target current (It) is set to zero.
Motor control unit and electric power steering system
Motorsteuereinheit und elektrisches Servolenkungssystem
Unité de commande de moteur et système de direction assistée électrique
2018-08-22
Patent
Electronic Resource
English
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