| Title |
Characteristic Analysis of Flyback Type ZVS PWM DC-DC Converter Using Passive Resonant Snubber |
| Authors |
김정도(Kim, Jung-Do) ; 문상필(Mun, Sang-Pil) ; 박한석(Park, Han-Seok) |
| DOI |
https://doi.org/10.5370/KIEEP.2016.65.3.158 |
| Keywords |
Passive snubbers ; Flyback type DC-DC converter ; Current regeneration ; Soft switching ; Three winding auxiliary high frequency transformer |
| Abstract |
In this paper, a high frequency flyback type zero voltage soft switching PWM DC-DC converter using IGBTs is proposed. Effective applications for this power converter can be found in auxiliary power supplies of rolling stock transportation and electric vehicles. This power converter is basically composed of active power switches and a flyback high frequency transformer. In addition to these, passive lossless snubbers with power regeneration loops for energy recovery, consisting of a three winding auxiliary high frequency transformer, auxiliary capacitors and diodes are introduced to achieve zero voltage soft switching from light to full load conditions. Furthermore, this power converter has some advantages such as low cost circuit configuration, simple control scheme and high efficiency. Its operating principle is described and to determine circuit parameters, some practical design considerations are discussed. The effectiveness of the proposed power converter is evaluated and compared with the hard switching PWM DC-DC converter from an experimental point of view and the comparative electromagnetic conduction and radiation noise characteristics of both DC-DC power converter circuits are also depicted. |