Electricity: motive power systems – Motor-reversing – Armature or primary circuit control
Reexamination Certificate
2005-01-04
2005-01-04
Martin, David (Department: 2837)
Electricity: motive power systems
Motor-reversing
Armature or primary circuit control
C318S293000, C318S280000, C180S410000, C180S443000, C701S042000
Reexamination Certificate
active
06838844
ABSTRACT:
An electric power steering apparatus includes a steering torque detector, a brushless motor PWM-driven with a three-phase alternating motor current, a target current setting section for setting a d-axis target current value and a q-axis target current value, motor current detectors for detecting motor current values supplied to the brushless motor, a three-phase AC/d-q coordinate transformation circuit, a first deviation calculation circuit for calculating a deviation of a current value of a q-axis detection signal from the q-axis target current value, a second deviation calculation circuit for calculating a deviation of a direct current value a d-axis detection current signal from the d-axis target current, a motor control section for controlling driving of the brushless motor through a vector control process on the basis of deviation signals outputted from the first and second deviation calculation circuits, and an attenuation device provided in a feedback transmission path of the q-axis detection current signal for attenuating a high frequency noise mixed in the q-axis detection current signal.
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Arimura Yutaka
Shimizu Yasuo
Yoneda Atsuhiko
Colon Santana Eduardo
Honda Giken Kogyo Kabushiki Kaisha
Martin David
Merchant & Gould P.C.
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