Electricity: motive power systems – Armature circuit control – By armature or primary circuit-making and/or breaking
Reexamination Certificate
2008-04-17
2010-06-29
Masih, Karen (Department: 2837)
Electricity: motive power systems
Armature circuit control
By armature or primary circuit-making and/or breaking
C318S504000, C318S434000
Reexamination Certificate
active
07746017
ABSTRACT:
An exemplary fan driving system includes a driving device and a MOSFET group. The driving device includes a first adjustable resistor connected between its first voltage signal input terminal and ground, and a second adjustable resistor connected between its second voltage signal input terminal and ground. The MOSFET group includes two N-type MOSFETs and two P-type MOSFETs. The first terminal of the fan is connected to an anode of D1and a cathode of D3. The second terminal of the fan is connected to an anode of D2and a cathode of D4. Cathodes of the D1and D2are configured to connect a supply voltage. Anodes of the D3and D4both are grounded. The fan driving system can effectively discharge off the residual current in the coil of the fan at the moment of the MOSFET group being switched off.
REFERENCES:
patent: 2007/0222290 (2007-09-01), Matsuhashi
Lin Kai-Ping
Lin Tsung-Jen
Cheng Andrew C.
Fitipower Integrated Technology, Inc.
Masih Karen
LandOfFree
Fan driving system with safe driving current switching does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Fan driving system with safe driving current switching, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fan driving system with safe driving current switching will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4169833