An electric power steering apparatus may be employed to assist steering of a motor vehicle by conferring torque generated by an electric motor to a steering mechanism. The apparatus may include a steering controller that receives signals representative of vehicle velocity and torque applied to a steering wheel and a rotor position signal to derive a target motor torque, a motor controller that receives the target motor torque from the steering controller and transfers the target motor torque into target voltages expressed in a coordinate system fixed to a stator, and an inverter that transforms the target voltages into motor currents. The apparatus may further include a ripple compensation unit that compensates the target voltages for a (n−1)-th harmonic current by adding compensation voltages to the target voltages.
Electric power steering system with ripple compensation
17.12.2019
Patent
Elektronische Ressource
Englisch
ELECTRIC POWER STEERING SYSTEM WITH RIPPLE COMPENSATION
Europäisches Patentamt | 2018
|ELECTRIC POWER STEERING SYSTEM WITH RIPPLE COMPENSATION
Europäisches Patentamt | 2019
|ELECTRIC POWER STEERING SYSTEM WITH RIPPLE COMPENSATION
Europäisches Patentamt | 2016
|