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Comparison between the conventional half-bridge and the proposed half-bridge structure_
| Sl. No. | Conventional half-bridge converter | Proposed half-bridge structure |
|---|---|---|
| 1 | Snubber circuit contains three components (resistance, diode and capacitance) | The snubber circuit contains only capacitance |
| 2 | Filter ratings (LF and CF) are as per their designed values | A modified filter is required. The rating of the filter inductor is quite less, and the rating of the filter capacitor is very large as compared to a conventional one |
| 3 | Unidirectional current in the filter inductor | Bidirectional current in the filter inductor during each switching cycle |
| 4 | Hard switching of devices | Soft-switching of devices |
Output voltage profile of the proposed buck converter for an input voltage of 30 V_
| K (%) | Output voltage of buck converter (V) | Output voltage of proposed buck converter(V) |
|---|---|---|
| 20 | 6 | 5.58 |
| 30 | 9 | 8.3 |
| 40 | 12 | 11.5 |
| 50 | 15 | 14.62 |
| 60 | 18 | 17.5 |
| 70 | 21 | 20.74 |
| 80 | 24 | 23.6 |
| 85 | 25.5 | 25.2 |
Performance comparison of various topologies_
| Components | Yen and Chao | Khalili et al. | Montezerolghaem et al. | Proposed structure |
|---|---|---|---|---|
| Switches | 4 | 2 | 2 | 2 |
| Diodes | 2 | 3 | 4 | 2 |
| Inductors coupling inductors | 2 | 1 | 4 | 1 |
| 1:2 | No | 1:1 (2) | No | |
| Capacitors | 1 | 5 | 4 | 3 |
| ZVS/ZCS | ZVS | ZVS | ZVS | Turn on under ZVS and ZCS. Turn off under ZVS |