Lossless snubber

Details Lossless snubber Lossless snubber

1990-10-12

1991-10-08

Stephan, Steven L.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

363 21, 361 91, 361111, H02H 7122

Patent

active

050559915

ABSTRACT:
A capacitor connected directly across the terminals of the primary inductance of a transformer of a switched mode power supply and a separately wound inductor connected between the primary inductance and the switching power transistor which form a lossless snubber circuit. The snubber circuit is more efficient since resistors are not used to dissipate the energy as unwanted heat. The capacitor increases the transistor turn off voltage rise time, thereby reducing radiated emissions. The inductor reduces emissions appreciably by absorbing the ringing that would otherwise occur after the transistor is turned fully off and increases the transistor turn on time.

REFERENCES:
patent: 4268898 (1981-05-01), Brown
patent: 4365171 (1982-12-01), Archer
patent: 4438485 (1984-03-01), Voight
patent: 4561046 (1985-12-01), Kuster
patent: 4675796 (1987-06-01), Gautherin et al.
patent: 4760512 (1988-07-01), Loftus
patent: 4772810 (1988-09-01), Felps
patent: 4870554 (1989-09-01), Smith
patent: 4977493 (1990-12-01), Smith

Affiliated with

Also associated with

Rating

Lossless snubber does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Lossless snubber, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lossless snubber will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-261682