B - Operations – Transporting – 62 – D
Patent
B - Operations, Transporting
62
D
B62D 5/04 (2006.01) B62D 5/065 (2006.01)
Patent
CA 2427274
A power steering device capable of obtaining a high rotary speed in the medium low torque range of an electric motor without incurring a drastic increase in manufacturing cost. The power steering device generates an auxiliary steering power by oil pressure that is generated by a pump which is driven by an electric power motor. The electric motor is a triple-phase brushless motor, with its angle of rotation being detected by the Hall sensors. The field coils are provided with the electric current from a drive circuit which is driven by a drive signal from the motor drive control part. The motor drive control part controls the electric motor by PWM control in the low medium speed rotation range and controls the electric motor by phase advance angle control, with PWM duty at 100 percent, in the medium high speed range.
Eskritt James B.
Jounokunchi Hideki
Kuehner Joel B.
Yamazaki Yoshiyuki
International Rectifier Corporation
Koyo Seiko Co. Ltd.
Mccarthy Tetrault Llp
Siliconix Technology C.v.
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