Electricity: motive power systems – Constant motor current – load and/or torque control
Reexamination Certificate
2011-03-22
2011-03-22
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Constant motor current, load and/or torque control
C318S434000, C318S610000
Reexamination Certificate
active
07911168
ABSTRACT:
A control unit controls a drive signal for determining a voltage to be supplied to the motor. A drive unit drives the motor by applying a current corresponding to the voltage determined based on the drive signal to the motor. The control unit includes a velocity detecting unit that detects a rotation velocity of the motor and an output unit that outputs the drive signal corresponding to a voltage with which a current lower than a predetermined current limit is applied to the motor, based on the rotation velocity of the motor detected by the velocity detecting unit.
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Office Action dated Nov. 20, 2009 issued in corresponding Chinese Application No. 2008100741751 and English translation thereof.
Harness & Dickey & Pierce P.L.C.
Ricoh Company Limited
Ro Bentsu
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