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In order to study the reliability of traction motor insulation system, according to the operation condition of traction motor, we established a reliability verification method with electrothermal ageing, temperature variation, constant damp heat, mechanical vibration, and sand and dust as ageing factors. The comparative tests were conducted on the reference insulation structure of locomotive traction motor and one to be evaluated, and the non-destructive characteristic parameters including insulation resistance, dielectric loss factor, and PDIV were measured. The results show that the reliability verification method can quickly compare the reliability of insulation system. During the test, the insulation performance increases at first and then decreases. Dielectric loss factor and PDIV have more obvious characterization effect on the ageing of insulation system than insulation resistance.
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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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