Electricity: motive power systems – Induction motor systems – Primary circuit control
Reexamination Certificate
2010-02-12
2010-11-02
Duda, Rina I (Department: 2837)
Electricity: motive power systems
Induction motor systems
Primary circuit control
C318S599000, C363S021100
Reexamination Certificate
active
07825622
ABSTRACT:
A load driving device controls two motors by PWM signals. When a standard duty ratio of the PWM signals is 50% and a level of a drive instruction is the standard duty ratio, the standard duty ratio are output to the respective motors to provide a reverse phase relationship that the PWM signal of the standard duty ratio does not overlap. A continuous off-period and the standard PWM signal output when the level of the drive instruction is lower than the standard, and the continuous on-period and the standard PWM signal output when the level of the drive instruction is higher than the standard are changed over at the ratios corresponding to the level of the drive instruction.
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Office Action dated Jan. 13, 2009 in corresponding JP application No. 2007-226171 (and English Translation).
Office Action dated Nov. 18, 2009 from the German Patent and Trademark Office in the corresponding patent application No. 10 2007 055 837.8-32 (English translation enclosed).
DENSO CORPORATION
Duda Rina I
Posz Law Group , PLC
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