Switching power source apparatus

Details Switching power source apparatus Switching power source apparatus

2006-10-31

2006-10-31

Laxton, Gary L (Department: 2838)

Electric power conversion systems

Current conversion

Including automatic or integral protection means

C363S021010

Reexamination Certificate

active

07130204

ABSTRACT:
A switching power source apparatus can reduce the size of a transformer and realize the zero-voltage switching of a switch. The apparatus is compact, highly efficient, and low in noise. The apparatus has a series circuit connected to each end of a DC power source (Vdc1) and including a primary winding (5a) of a transformer (T) and a main switch (Q1), a rectifying-smoothing circuit to rectify and smooth a voltage that is outputted from a secondary winding (5b) when the main switch (Q1) is turned on, a series circuit connected to each end of the primary winding (5a) and including an auxiliary switch (Q2) and a clamp capacitor (C1), a series circuit connected to each end of the main switch (Q1) and including a diode (Dx1) and a snubber capacitor (Cx), a series circuit connected to a node between the diode (Dx1) and the snubber capacitor (Cx) and a node between the auxiliary switch (Q2) and the clamp capacitor (C1) and including an auxiliary winding (5x) and a diode (Dx2), and a control circuit (10) to alternately turn on/off the main switch (Q1) and auxiliary switch (Q2). When the main switch (Q1) is turned on, the snubber capacitor (Cx) is discharged through the auxiliary winding (5x) to the clamp capacitor (C1). When the main switch (Q1) is turned off, the snubber capacitor (Cx) is charged, to relax the inclination of a voltage increase of the main switch (Q1).

REFERENCES:
patent: 6396719 (2002-05-01), Morita et al.
patent: 6717827 (2004-04-01), Ota
patent: 6930896 (2005-08-01), Mizokami et al.
patent: 6947297 (2005-09-01), Ke et al.
patent: 09-312973 (1997-12-01), None
patent: 11-289763 (1999-10-01), None
patent: 2000-184710 (2000-06-01), None
Kousuke Harada, “Switching Power Source Handbook”, Nikkan Kogyo Shinbunsha Shuppan, Chapter 2 Basic Circuit and Designing Practice of Switching Power Source, p. 27, Fig. 2.2 (main portion of forward type converter).
Kazuo Shimizu, “High-Speed Switching Regulator”, Sougou Denshi Shuppansha, 2.2.1, Separately Excited Converter, p. 30, Fig. 2.5 (single converter).

Affiliated with

Also associated with

Rating

Switching power source apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3708819