Electricity: electrical systems and devices – Control circuits for electromagnetic devices – Systems for magnetizing – demagnetizing – or controlling the...
Reexamination Certificate
2008-05-06
2008-05-06
Deberadinis, Robert L. (Department: 2836)
Electricity: electrical systems and devices
Control circuits for electromagnetic devices
Systems for magnetizing, demagnetizing, or controlling the...
C361S154000, C361S155000, C361S160000
Reexamination Certificate
active
07369391
ABSTRACT:
In a direct-current voltage-driven magnetic contactor, a main contact is in an open circuit condition in an attraction period of an initial period of excitation by an operating coil, and in a closed circuit condition in a subsequent holding period, and a drive circuit includes a direct-current power supply voltage detecting circuit that gives a start signal when an applied voltage of a exciting direct-current power supply exceeds a predetermined value, a first drive circuit that makes a starting semiconductor switching element perform an ON operation on receiving the start signal, and a second drive circuit that makes a current limiting semiconductor switching element perform a switching operation when a terminal voltage of a charging capacitor reaches the predetermined value.
REFERENCES:
patent: 5202813 (1993-04-01), Uota et al.
patent: 5416665 (1995-05-01), Nishiwaki et al.
patent: 6169431 (2001-01-01), Xu
patent: 61-93529 (1986-05-01), None
patent: 3-55232 (1991-12-01), None
patent: 5-291031 (1993-11-01), None
patent: 6-38359 (1994-02-01), None
patent: 7-220598 (1995-08-01), None
patent: 8-17315 (1996-01-01), None
Andou Tarou
Sekiguchi Tsuyoshi
Tanaka Tetsuo
DeBeradinis Robert L.
Kitov Zeev
Mitsubishi Denki & Kabushiki Kaisha
Sughrue & Mion, PLLC
LandOfFree
Drive circuit of direct-current voltage-driven magnetic... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Drive circuit of direct-current voltage-driven magnetic..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drive circuit of direct-current voltage-driven magnetic... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2809114