Low-noise switching power supply having variable reluctance tran

Details Low-noise switching power supply having variable reluctance tran Low-noise switching power supply having variable reluctance tran

1989-09-20

1991-02-19

Beha, Jr., William H.

Electric power conversion systems

Current conversion

Including automatic or integral protection means

336 73, 363 97, H02M 7538, H02M 3337

Patent

active

049949527

ABSTRACT:
There is provided a low-noise switching power supply for producing a regulated output voltage from an unregulated supply. The power supply includes a main transformer having first, second and third legs. A primary winding associated with a first leg produces an alternating magnetic flux in the core. A load winding associated with a second leg produces the output voltage from the power supply. A control winding is associated with the third leg. The regulated output voltage is compared to a reference voltage and used to operate a control circuit which alternately short circuits the control winding so as to vary the reluctance pass in the transformer and maintain the output voltage at a substantially constant predetermined value. A feedback circuit including a coupling transformer connects the primary coil to the switching circuit to improve regulation and provide a "soft start" capability.
A second embodiment of the present invention utilizes a constant frequency source to drive the main switching transistors of the unregulated power supply instead of the self oscillating scheme.

REFERENCES:
patent: 3660749 (1972-05-01), Kadri
patent: 4177418 (1979-12-01), Brueckner et al.
patent: 4327348 (1982-04-01), Hirayama
patent: 4342075 (1982-07-01), Hiromitsu
patent: 4616301 (1986-10-01), Small
patent: 4737704 (1988-04-01), Kalinnikov et al.
patent: 4782437 (1988-11-01), Nishiyama et al.
patent: 4858093 (1989-08-01), Sturgeon

Affiliated with

Also associated with

Rating

Low-noise switching power supply having variable reluctance tran does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low-noise switching power supply having variable reluctance tran, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low-noise switching power supply having variable reluctance tran will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1148897