Steering control unit
AssigneeJtekt Corporation
InventorsHidenori Itamoto, Takashi Kageyama, Toshie Hibi, Akihiro Tomita
Life of this patent
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Abstract
Provided is a steering control unit for improving influence of fluctuations in an estimated electrical angle on steering feel. A steering control unit includes a microcomputer that performs sensorless control of the driving of a motor by using an estimated electrical angle estimated by calculation. The microcomputer calculates the estimated electrical angle from a value that is obtained by selectively accumulating a first additional angle or a second additional angle. The microcomputer adjusts a vibration component of fluctuations in the estimated electrical angle by varying the amount of change in the first additional angle and the second additional angle.
Claims6
A steering control unit comprising:
- a control circuit configured to perform sensorless control of driving of a motor by using an estimated electrical angle estimated by calculation, the motor being a source of an assist force that is supplied to a steering mechanism on the basis of steering torque that is input to the steering mechanism to steer a steered wheel of a vehicle, wherein
- the control circuit calculates an additional angle when calculating the estimated electrical angle,
- the control circuit calculates the estimated electrical angle from a value that is obtained by accumulating the additional angle, and
- the control circuit adjusts a vibration component of fluctuations in the estimated electrical angle by varying an amount of change in the additional angle.
Dependencies are inferred from the claim text.