Electric power steering system
AssigneeJtekt Corporation
InventorsHayato KOMATSU, Yoshinobu SHIMIZU, Yuji KARIATSUMARI, Shingo MAEDA, Yasuyuki YOSHII
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Abstract
An electric power steering system includes a motor that applies assist force to a steering system, and updates a motor resistance (Rm) that is a value indicating a resistance of the motor. Specifically, the motor resistance (Rm) is updated on the basis of the fact that an induced voltage (EX) of the motor is smaller than a first determination value (GA). In addition, when the induced voltage (EX) is smaller than or equal to a second determination value (GB), a divided value that is obtained by dividing a motor voltage (Vm) by a motor current (Im) is set as a new motor resistance (Rm).
Claims20
An electric power steering system comprising:
- a motor that applies assist force to a steering system, wherein
- a motor resistance that is a value indicating a resistance of the motor is updated, and
- when an induced voltage of the motor is smaller than or equal to a first determination value, the motor resistance is updated.
Dependencies are inferred from the claim text.