Electric power steering system
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United States of America Patent
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Aug 9, 2022
Grant Date -
Dec 3, 2020
app pub date -
May 12, 2020
filing date -
May 27, 2019
priority date (Note) -
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status (Latency Note)
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Abstract
An electric power steering system includes an electric motor, a rotational angle detection unit, a current detection circuit, a steering torque detection unit, a target torque setting unit, a current command value setting unit, and a current control unit. The target torque setting unit includes a basic target torque setting unit, a first compensation value computation unit, a second compensation value computation unit, and a correction unit. The basic target torque setting unit sets basic target torque for the electric motor. The first compensation value computation unit sets a first compensation value based on steering torque. The second compensation value computation unit computes a second compensation value which is an estimated value of disturbance torque other than the steering torque. The correction unit corrects the basic target torque.
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