Full
Outline
By improving the traditional non-isolated Γ-Z source converter, a novel high-frequency isolated anti-Γ source AC-AC converter is proposed, which can be applied to AC transformers, dynamic voltage restorers, etc. This converter uses a high-frequency coupled inductor which acts as a high-frequency transformer, and its size is thus reduced. The addition of an anti-Γ source makes the voltage gain of the converter flexibly adjustable, so that its Buck or Boost voltage range is extended, and the output and input voltages can be maintained in-phase or out-phase. The use of a safe commutation pulse width modulation (PWM) strategy can suppress the voltage spike of a switch tube and reduce the switch loss. Through the analysis of working states of the converter, the relationship between the output voltage and input voltage is calculated for each device, and the performance parameters of the proposed converter are compared with those of other AC converters, indicating the advantages of the novel converter. A simulation model was established by MATLAB/Simulink, and the printed circuit board (PCB) of the converter was drawn for experiments. The proposed converter was discussed and verified based on simulation and experimental results.
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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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