Data processing: vehicles – navigation – and relative location – Vehicle control – guidance – operation – or indication – Vehicle subsystem or accessory control
Reexamination Certificate
2007-08-23
2010-11-09
Zanelli, Michael J. (Department: 3661)
Data processing: vehicles, navigation, and relative location
Vehicle control, guidance, operation, or indication
Vehicle subsystem or accessory control
C701S042000, C180S446000
Reexamination Certificate
active
07831356
ABSTRACT:
An electric power steering control apparatus for controlling a motor that provides an assisting force for steering a steering wheel has a command value calculation device operable to calculate a command value for a torque current to be fed to the motor based on a steering torque of the steering wheel, a magnetic field control device operable to control intensity of a magnetic field in the motor, and a motor drive device operable to drive the motor based on outputs from the command value calculation device and the magnetic field control device. The magnetic field control device is operable to perform a field weakening control for weakening the magnetic field in the motor when a vehicle speed is less than a predetermined value, and to not perform the field weakening control when the vehicle speed is not less than the predetermined value.
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Extended European Search Report for Application No. 07112212.1-2423/1900605, dated Aug. 4, 2010, (7 pages).
Hamasaki Masamitsu
Kuratani Shinichi
Yabuguchi Michisada
OMRON Corporation
Osha • Liang LLP
Zanelli Michael J.
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