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This paper presents a zero voltage switching (ZVS) Cuk converter with double ended rectifier to reduce switching losses on power semiconductors, decrease voltage stresses on rectifier diodes and achieve power delivery to output load in positive and negative half cycle of the secondary winding voltage. An auxiliary switch and a clamp capacitor are connected in parallel with the primary side of the...
In designing low power switching mode power supply (SMPS), its functions, tech-parameter and cost should be considered at the same time. TOP switch has stronger functions than the discrete components. It is easy and flexible to design SMPS based on TOP Switch and the products always get less cost. SMPS based on UC3842 or UC3843 is compared with the one based on TOP switch in the paper. Then an actual...
Using several IGBTs in parallel it is possible to operate standard IGBTs with higher switching frequencies than usual. Based on this concept the current load and thermal losses are split between the paralleled devices. The free wheeling diodes, however, cannot be controlled actively and therefore do not share in sequential switching. In 3-phase VSI applications there is the danger of overloading one...
A novel zero-voltage-switching (ZVS) combined three-level (TL) converter is proposed in this paper. It is essentially a hybrid combination of a half-bridge TL section and a full-bridge section. The main advantages of the proposed converter are given as follows: the voltage stress of all the switches is ensured to be only half of the input voltage; the secondary rectified voltage is very close to the...
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