Full
Outline
For increasing the output energy of the explosive-driven ferromagnetic generators, a new structure of ferromagnetic element has been designed to reduce the eddy current waste. The cylinderical Nd2Fe14B rare-earth magnet was cut into four separate parts, and the insulated layers were placed between magnet parts for keeping them insulating from each other. And then the four magnet parts with insulated layers were combined together again to form a new cylinder. The magnetic field calculations of the magnet cylinder and the cylinder with insulated layers were conducted by the Maxwell 3D code of the electromagnetic analysis software. The initial magnetic flux distribution of two types of cylinders were obtained. The detonation tests of ferromagnetic generators were carried out, and the electromotive forces of ferromagnetic generators were measured. The results show that the eddy current waste of the generator with insulated layers is lower than the generator without insulated layers, and the output energy of the former is higher than that of the latter.
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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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