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Outline
A low-ripple DC-DC converter with quasi-Z-source coupled inductance is proposed, which integrates a quasi-Z-source network, a coupled inductor and voltage doubler cells. The quasi-Z-source network has functions of Boost voltage and passive clamp. While the converter achieves a high gain, the switching tube realizes passive clamp and recovers leakage energy from the coupled inductors. When the duty cycle is in the range of 0–0.5, the high gain, high efficiency and low ripple of input current required by new energy power generation can be achieved, avoiding the influence of an extreme duty cycle. The steady-state analysis, efficiency analysis and experimental verification for the converter were carried out, and its performance was compared with those of similar converters. A 200 W prototype was fabricated in a laboratory, and experimental results were basically consistent with the theoretical analysis.
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| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |
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