Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Transformer in the supply circuit
Patent
1996-03-08
1998-03-24
Pascal, Robert
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Transformer in the supply circuit
315278, 336165, 336178, 336181, H05B 4116
Patent
active
057316660
ABSTRACT:
A two-winding, integrated-magnetic EMI filter provides damped common-mode and differential-mode inductances. The preferred embodiment of the filter has a magnetic core structure that incorporates a high-permeability C-core, a high-permeability I-core, and a low-permeability, lossy shunt. The three core pieces are assembled so as to form a structure that, similar to an E-I configuration, has two winding windows. The loss in the shunt aids in dissipating noise and it diminishes the effects of unwanted parasitic resonances by providing damping for the differential-mode inductance. Damping for the common-mode inductance is provided by losses in the C and I core pieces. Varying the reluctance of the shunt allows the differential-mode inductance to be adjusted separately from the common-mode inductance in order to tune the filter to remove desired noise frequencies. Another embodiment of the invention incorporates a high-permeability toroid core and a low-permeability, lossy shunt.
REFERENCES:
patent: 4088942 (1978-05-01), Miko
patent: 4202031 (1980-05-01), Hesler et al.
patent: 4422056 (1983-12-01), Roberts
patent: 4654563 (1987-03-01), Boyd
patent: 4902942 (1990-02-01), El-Hamamsy
patent: 5083101 (1992-01-01), Frederick
patent: 5119059 (1992-06-01), Covi
patent: 5187428 (1993-02-01), Hutchison et al.
patent: 5313176 (1994-05-01), Upadhyay
patent: 5525951 (1996-06-01), Sunano et al.
Siemens Components Application Notes, Arminn Schweiger, Nov. 1995, p. 27.
Micrometals Power conversion and Line Filter Catalog 4 Issue G p. 10.
Folker Don V.
Hesterman Bryce L.
Mortimer George W.
Soule Dan
Bourgeois Mark P.
Magnetek Inc.
Pascal Robert
Philogene Haissa
LandOfFree
Integrated-magnetic filter having a lossy shunt does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Integrated-magnetic filter having a lossy shunt, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Integrated-magnetic filter having a lossy shunt will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2291457