Full
Outline
At present, most of the traditional Cauer models assume that the shape of the effective thermal conduction surface of each layer in an insulated gate bipolar transistor (IGBT) module is square or circular, which leads to large errors of the calculation results of IGBT module junction temperature. On this basis, the shape of the effective thermal conduction surface of each layer in the IGBT module are studied, and a Cauer model considering the deformation characteristics of thermal diffusion boundary is proposed to make it more suitable for the actual situation. It is found that a phenomenon of offset occurs at the thermal diffusion boundary of the IGBT module. By capturing the diameter of the selected dynamic thermal diffusion boundary and modifying the parameters of the Cauer model which considerers the deformation and offset characteristics of dynamic thermal diffusion boundary, the junction temperature of the IGBT module can be accurately estimated. The correctness and feasibility of the proposed optimization method for Cauer model consideringthe deformation and offset characteristics of dynamic thermal diffusion boundary were verified by 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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