Full
Outline
The high-voltage power supply is a high-voltage and wide-range input power supply, which is used in flexible DC transmission systems to power the modular multilevel converter (MMC) submodule control circuit. In order to make the power supply work under a higher and wider input voltage range, a multi-channel input series structure is used to reduce the voltage stress of power and magnetic devices. In view of the problem of too many magnetic components in the series circuit and whether the input voltage at each level is balanced, a high-voltage power supply based on planar magnetic integrated transformer designed. First, the double-switch flyback topology and its important modes are introduced, and the principle of voltage self-balanced is analyzed. Subsequently, the planar magnetic integrated transformer is specifically designed. Then the planar magnetic integrated transformer is simulated by Maxwell software. The magnetic density distribution, loss and temperature rise characteristics of the transformer are analyzed. Finally, a prototype that can operate stably and effectively with an input voltage of 350.0 V~4 000.0 V and an output voltage of 400 V is built. The experimental results show the effectiveness of the design.
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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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