Electricity: motive power systems – Constant motor current – load and/or torque control
Reexamination Certificate
2007-11-13
2007-11-13
Donovan, Lincoln (Department: 2837)
Electricity: motive power systems
Constant motor current, load and/or torque control
C318S132000, C318S139000, C318S434000, C318S434000
Reexamination Certificate
active
10998579
ABSTRACT:
A steering controlling device comprising a power source, a motor connected to a steering system, a motor driving circuit converting a power source voltage to a predetermined voltage and applying the voltage to the motor, and a controlling means for controlling the motor driving circuit, wherein the controlling means controls the motor driving circuit so as to boost the power source voltage when a rotational speed of the motor is a predetermined value or more, whereby a sufficient motor output torque is obtainable under various steering conditions in use of a converter, an efficiency is improved by suppressing a frequency of operating the converter, and an appropriate fail safe treatment is conducted when the converter is disordered.
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Japanese Office Action dated Apr. 5, 2005.
Donovan Lincoln
Smith Tyrone
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