Switching power supply apparatus

Details Switching power supply apparatus Switching power supply apparatus

1982-09-27

1985-02-12

Shoop, William M.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

363 21, H02M 3335

Patent

active

044995300

ABSTRACT:
In accordance with the present invention, there is provided a power supply apparatus comprising a primary winding of a main transformer and a semiconductor device with a control electrode connected in series between both electrodes of a DC power source, a drive current being fed to said control electrode of said semiconductor device via an auxiliary transformer, and output being obtained on a secondary winding of said main transformer by turning on and off of said semiconductor device, wherein a tertiary winding is provided on said main transformer and a negative polarity drive current is flowed into said semiconductor device via said tertiary winding when said semiconductor device is to turn off.

REFERENCES:
patent: 3925717 (1975-12-01), Kinnard
patent: 4084219 (1978-04-01), Furukawa et al.
patent: 4156273 (1979-05-01), Sato

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