The IGBT module of a motor controller is one of the important components for realizing electric energy conversion and motor control. This module usually works under complex conditions, and its reliability is crucial for the stability of the whole electric drive system. In general, the IGBT loss is directly calculated using the method of manual formulas, which ignores the influence of temperature rise on the IGBT module. Aimed at this problem, a method of thermal coupling analysis is proposed. First, a loss calculation model of IGBT module is established. On the basis, a thermal network model is built for the estimation of junction temperature, and the temperature rise estimation result is further used to correct the loss calculation model. A simulation model of the motor controller is constructed, and the junction temperature and loss of IGBT are simulated. In addition, the effectiveness of the proposed thermal coupling analysis method was verified by the results of a temperature rise experiment conducted on the motor controller.
| 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 |