Electricity: electrical systems and devices – Safety and protection of systems and devices – Motor protective condition responsive circuits
Reexamination Certificate
2006-07-11
2010-12-07
Leykin, Rita (Department: 2837)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Motor protective condition responsive circuits
C361S001000, C361S031000, C361S087000, C361S093100, C361S093900, C361S101000, C318S432000, C318S434000
Reexamination Certificate
active
07848066
ABSTRACT:
A motor drive device includes: chopping signal generation means for generating a chopping signal Sa when drive current of a driver has reached a first threshold value; chopping signal cut-off means for cutting off the chopping signal Sa when the drive current has reached a second threshold value which is greater than the first threshold value; and overcurrent protection means for generating an overcurrent protection signal Se when the drive current has reached a third threshold value which is greater than the first threshold value and its continuation time has reached a predetermined threshold value time. Thus it is possible to simultaneously obtain the constant current chopping function and the overcurrent protection function and to improve its reliability and safety.
REFERENCES:
patent: 4208621 (1980-06-01), Hipkins et al.
patent: 4535378 (1985-08-01), Endo
patent: 4875000 (1989-10-01), Fry et al.
patent: 5280228 (1994-01-01), Kanouda et al.
patent: 5687049 (1997-11-01), Mangtani
patent: 5689395 (1997-11-01), Duffy et al.
patent: 5986442 (1999-11-01), Abe et al.
patent: 6633471 (2003-10-01), Ko
patent: 05-111144 (1993-04-01), None
patent: 05-111145 (1993-04-01), None
patent: 11-206189 (1999-07-01), None
Fish & Richardson P.C.
Leykin Rita
Rohm & Co., Ltd.
LandOfFree
Motor drive device and electronic device using the same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Motor drive device and electronic device using the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Motor drive device and electronic device using the same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4154181