MOTOR CONTROL METHOD AND DEVICE FOR ELECTRIC ASSIST STEERING SYSTEM

WIPO Patent Application WO/2019/135576

A1

A method for calculating a steering assist torque, for controlling the motor of an electric assist steering system, comprises the steps of: generating a low frequency torque signal from an applied steering torque signal by using a low-pass filter; calculating a low frequency assist torque on the basis of the low frequency torque signal; generating a relatively high frequency torque signal by using the applied steering torque signal and the low frequency torque signal; generating a high frequency torque signal from the relatively high frequency torque signal by using a high-pass filter; calculating a high frequency assist torque on the basis of the high frequency torque signal; and calculating a steering assist torque by summing the low frequency assist torque and the high frequency assist torque. The high-pass filter is equipped with a plurality of high-pass filters divided according to steering angle sections, and the relatively high frequency torque signal is selectively distributed to any one among the plurality of high-pass filters according to the size of the steering angle at a corresponding time point and the high frequency torque signal is generated.

LEE JUNG IL (KR)
PARK SE JUNG (KR)
LIM CHAE HYO (KR)

PCT/KR2018/016956

July 11, 2019

December 31, 2018

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ERAE AMS CO LTD (KR)

B62D5/04; B62D6/02; B62D6/08

JP4398618B2	2010-01-13
KR20050046726A	2005-05-18
KR20170078405A	2017-07-07
JP2010195097A	2010-09-09
JPH11313497A	1999-11-09

MI PATENT AND LAW FIRM (KR)

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