Electricity: electrical systems and devices – Safety and protection of systems and devices – Motor protective condition responsive circuits
Reexamination Certificate
2008-04-08
2008-04-08
Donovan, Lincoln (Department: 2837)
Electricity: electrical systems and devices
Safety and protection of systems and devices
Motor protective condition responsive circuits
C361S024000, C361S031000
Reexamination Certificate
active
07355826
ABSTRACT:
A current detection unit starts sampling of a motor current at the timing when the motor current has exceeded a threshold value, and holds a maximum motor current value for each prescribed operation cycle. An abnormality determination unit determines whether the maximum motor current value is greater than the threshold value, and counts the number of times that the maximum motor current value continuously exceeds the threshold value. When the count value has reached at least 3, the abnormality determination unit generates and outputs a detection signal indicating abnormality in the motor current to a relay drive unit and a notification unit. The relay drive unit in receipt of the detection signal generates a signal to turn off the system relays. The notification unit generates and outputs a signal AL to display means outside the power supply apparatus.
REFERENCES:
patent: 4286303 (1981-08-01), Genheimer et al.
patent: 4504881 (1985-03-01), Wada et al.
patent: 4527214 (1985-07-01), Hattori et al.
patent: 4862343 (1989-08-01), Nomura et al.
patent: 5068777 (1991-11-01), Ito
patent: 5353188 (1994-10-01), Hatakeyama
patent: 5461531 (1995-10-01), Tuchiya et al.
patent: 5994790 (1999-11-01), Nagashima et al.
patent: 6324038 (2001-11-01), Kishibe et al.
patent: 7245094 (2007-07-01), Shinmura et al.
patent: 7262574 (2007-08-01), Koyanagi et al.
patent: 2005/0286181 (2005-12-01), Ochiai
patent: 2007/0046226 (2007-03-01), Takahashi
patent: 2007/0097566 (2007-05-01), Woods et al.
patent: A 7-123504 (1995-05-01), None
patent: A 2004-215316 (2004-07-01), None
Ochiai Kiyoe
Uechi Tatsuyuki
Yagi Koji
Yaguchi Hideaki
Brandt Michael
Donovan Lincoln
Oliff & Berridg,e PLC
Toyota Jidosha & Kabushiki Kaisha
LandOfFree
Power supply apparatus capable of detecting abnormality of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Power supply apparatus capable of detecting abnormality of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power supply apparatus capable of detecting abnormality of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2789392