Electricity: motive power systems – Positional servo systems – Digital or numerical systems
Reexamination Certificate
2006-10-03
2009-11-10
Ro, Bentsu (Department: 2837)
Electricity: motive power systems
Positional servo systems
Digital or numerical systems
C318S400340, C318S626000
Reexamination Certificate
active
07615959
ABSTRACT:
Disclosed is a control apparatus for a brushless DC motor, which has a rotor with n poles (where n is a natural number) that rotates due to a supply current with m phases (where m is a natural number) applied to a stator, controlling the number of output rotations of a gearbox, which is connected to the brushless DC motor and has a predetermined gear reduction ratio-wherein the gear reduction ratio represents a ratio of the number of rotations of the brushless DC motor to the number of output rotations of the gearbox-, the control apparatus comprising: a rotation detector part, which counts the number of rotation pulses generated by the rotation of the rotor from the brushless DC motor; a required rotational amount input part, which receives the number of output rotations as input and converts it to a corresponding required number of rotation pulses; a comparison part, which compares the number of output rotations and the required number of rotation pulses; and a current controller part, which controls a supply current applied to the brushless DC motor according to a comparison result of the comparison part.
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Office Action issued in corresponding German Patent Application No. 10 2006 047 214.4-32, on Nov. 19, 2007.
English translation of Chinese Patent Office Action, mailed Jan. 4, 2008 and issued in corresponding Chinese Patent Application No. 200610140040.1.
Japanese Office Action mailed on Jun. 1, 2009 and issued in corresponding Japanese Patent Application 2006-278289.
Ro Bentsu
Samsung Electro-Mechanics Co. Ltd.
Staas & Halsey , LLP
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