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Supplying regulated voltage to critical loads is an important topic for several years. This paper presents a single-phase electronic voltage regulator based on high frequency switching of an isolated transformer where primary side voltage is controlled by two full-bridge converters sharing a common DC bus and operating at 50 Hz and 20 kHz switching frequencies. This allows 50 Hz induced voltage on...
In this study, the principle of a phase-shifted full-bridge zero voltage switching ZVS DC / DC converter is analyzed. It focuses on soft-switching implementation, selection of rectifier bridge,parasitic oscillation suppression, voltage-type single-loop control and other issues. The implementation scheme of full digital control based on TMS320LF2407 is given. Then the system's hardware and software...
A full dc and ac analysis of a previous proposed boost-type-input soft-switching full-bridge converter is presented. The primary-side switches turn-on/off under a zero-current condition (ZCS). The soft-switching is realized by using a simple snubber, formed by two uni-directional switches and a resonant capacitor, in the primary side. The snubber's switches commute under a zero-voltage condition....
This paper deals with a 3 KW power factor correction (PFC) circuit based on the isolated full-bridge (FB) converter. The operation principle of the very converter is simply analyzed. Digital design consideration based on the small-signal dynamic modeling of the isolated PFC converter is specified in this paper. Implementation strategy and cost effectiveness of digital control for the single-stage...
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