Electric power steering system

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United States of America Patent

PATENT NO 8781682
APP PUB NO 20110010050A1
SERIAL NO

12828509

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A motor control signal output unit of an electric power steering system includes a feedback gain calculation unit (52), and a feedback control unit executes a feedback control with the use of a proportional gain (Kp) and an integral gain (Ki) that are calculated by the feedback gain calculation unit (52). The feedback gain calculation unit (52) sets the feedback gains to large values (Kp=P0, Ki=I0) when the absolute value of an assist gradient (α) is equal to or smaller than a predetermined value (α0) (|α|≦α0). On the other hand, when the absolute value of the assist gradient (α) exceeds the predetermined value (α0) (|α|>α0), the feedback gain calculation unit (52) sets the feedback gains to small values (Kp=p1, Ki=I1:P10, I10).

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Patent Owner(s)

  • JTEKT CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Nambu, Akira Okazaki, JP 16 65
Suzuki, Hiroshi Okazaki, JP 973 13737
Tamaizumi, Terutaka Okazaki, JP 64 440
Yamano, Naoki Okazaki, JP 33 139

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