Electricity: motive power systems – Constant motor current – load and/or torque control
Reexamination Certificate
2011-01-04
2011-01-04
Duda, Rina I (Department: 2837)
Electricity: motive power systems
Constant motor current, load and/or torque control
C318S434000, C388S901000
Reexamination Certificate
active
07863844
ABSTRACT:
A technology for correctly detecting a rotating position of a rotator at the time of rotation start. A rotation control apparatus controls rotation of a motor, which includes a stator provided with a plurality of coils and a rotor having magnetism. At the time of detecting a position of the motor when the motor is stopped, a control part supplies a current to a plurality of different paths including the coils, a stopped position detecting part measures the current flowing in each of the plurality of paths, judges the order of the measured current values, and a rotating position of the motor is detected based on the order. Based on a combination of a path showing the highest current value and a path showing the second highest current value, the stopped time position detecting part judges a position of the motor.
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Chinese Office Action for Chinese Patent Application No. 200580011216.7 issued May 16, 2008 with English Translation.
First Office Action, for corresponding Chinese Patent Application No. 200580011216.7, issued Nov. 2, 2007 and English translation.
Maeda Norihiro
Yamamoto Seiichi
Cantor & Colburn LLP
Duda Rina I
Rohm & Co., Ltd.
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