A motor is driven by the ³-axis current (I ³ ) of a ³´ coordinate system that is an imaginary rotating coordinate system. A command current value preparation unit (30) sets the ³-axis command current value (I ³ *) based on the command steering torque (T*) and the detected steering torque (T). The command current value preparation unit (30) includes a command current increase/decrease amount calculation unit (30A) and an addition unit (30B). The command current increase/decrease amount calculation unit (30A) calculates the current increase/decrease amount (I ³ *) for the command current value (I ³ *) based on the sign of the command steering torque (T*) and the deviation (T (= T - T*)) of the detected steering torque (T) from the command steering torque (T*). The current increase/decrease amount (AI ³ *) calculated by the command current increase/decrease amount calculation unit (30A) is added to the immediately preceding value (I ³ *(n-1)) of the command current value (I ³ *) by the addition unit (30B). Thus, the command current value (I ³ *) in the present calculation cycle is calculated.
Motor control unit and vehicle steering system
Motorsteuereinheit und Fahrzeuglenksystem
Unité de commande de moteur et système de direction de véhicule
20.03.2019
Patent
Elektronische Ressource
Englisch
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