Electricity: motive power systems – Constant motor current – load and/or torque control
Reexamination Certificate
2008-05-15
2011-10-25
Nguyen, John (Department: 3665)
Electricity: motive power systems
Constant motor current, load and/or torque control
C701S029000, C322S059000, C318S430000, C361S032000, C361S033000, C361S034000, C361S035000, C361S037000
Reexamination Certificate
active
08044624
ABSTRACT:
A load control apparatus outputs a PWM signal to a switching element to control a load. The switching element is connected between a power supply and a grand in series with the load. An abnormal increase detecting unit outputs an abnormal increase detection signal when detecting abnormal increase in applied voltage, which is applied to the load, relative to target voltage. An abnormal decrease detecting unit outputs an abnormal decrease detection signal when detecting abnormal decrease in the applied voltage relative to the target voltage. An operating state monitoring unit outputs a normally operating signal when the load normally operates. A signal combining unit generates a combined signal by combining the abnormal increase detection signal, the abnormal decrease detection signal, and the normally operating signal and outputs the combined signal via a common signal output terminal.
REFERENCES:
patent: 7301294 (2007-11-01), Ogino et al.
patent: 2006/0082347 (2006-04-01), Asada
patent: A-7-15992 (1992-01-01), None
patent: A-11-263240 (1999-09-01), None
patent: A-2002-204593 (2002-07-01), None
Office Action dated Jan. 19, 2009 in corresponding Japanese patent application No. 2007-327316 (and English translation).
Matsuo Yosuke
Sato Taketoshi
Takeuchi Shigeru
DENSO CORPORATION
Fei Jordan
Nguyen John
Posz Law Group , PLC
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