Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1999-01-28
2000-06-20
Nguyen, Matthew
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 18, H02M 3335
Patent
active
06078508&
ABSTRACT:
A self-oscillation type switching power supply apparatus comprises: a transformer T having a primary winding N1, a secondary winding N2, and a feedback winding N.sub.B ; a switching transistor Q1 for interrupting a current in said primary winding N1; a controlling transistor Q2 for controlling a positive feedback signal for said switching transistor Q1 from said feedback winding N.sub.B ; a time constant circuit adapted to be charged by a voltage produced in said feedback winding N.sub.B at a predetermined time constant and to give a controlling voltage to said controlling transistor Q.sub.2 ; a light emitting element of a photocoupler provided in a circuit for detecting an output voltage or output current from the secondary of said transformer T; a photodetector of said photocoupler connected to said time constant circuit whereby the time constant of said time constant circuit is changed in dependence on the detection of the output voltage or output current to stabilize the output voltage or output current; and a conducting path provided between an input power-supply voltage supplying section for the primary of said transformer T and a voltage-supplying section for said photodetector of the photocoupler.
REFERENCES:
patent: 4630186 (1986-12-01), Kudo
patent: 4758937 (1988-07-01), Usui et al.
patent: 4763236 (1988-08-01), Usui
patent: 4802076 (1989-01-01), Asai
patent: 4862338 (1989-08-01), Tanaka
patent: 4937724 (1990-06-01), Nakajima
patent: 5012399 (1991-04-01), Takemura et al.
Patent Abstract of Japan--05/172,499 "Switching Power Supply Apparatus" Dated Jun. 18, 1993.
Okamura Ryuji
Tanaka Naoki
Murata Manufacturing Co. Ltd.
Nguyen Matthew
LandOfFree
Self-oscillation type switching power supply 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 Self-oscillation type switching power supply apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-oscillation type switching power supply apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1858723