Electricity: motive power systems – Synchronous motor systems – Brushless motor closed-loop control
Reexamination Certificate
2009-04-14
2011-10-18
Ip, Paul (Department: 2837)
Electricity: motive power systems
Synchronous motor systems
Brushless motor closed-loop control
C318S400030, C318S400270, C318S400320
Reexamination Certificate
active
08040089
ABSTRACT:
Switching elements are driven by a control signal outputted from a control circuit, so that a rotating magnetic field is generated from a stator coil to rotate a rotor of a synchronous electric motor. The control signal is generated through use of a selected modulation scheme, which is selected from a plurality of modulation schemes. The control circuit determines which one of the modulation schemes is used as the selected modulation scheme based on a sensed voltage value of a voltage sensor, which senses an output voltage of a power supply device.
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Office Action dated Jan. 19, 2010 issued from the Japan Patent Office in the corresponding patent application No. 2008-105874 (and English translation).
DENSO CORPORATION
Ip Paul
Posz Law Group , PLC
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