Full
Outline
The difference in characteristic parameters of an IGBT module is an important factor leading to the difference in control circuit parameters, which has a significant impact on the dynamic current-sharing characteristics of IGBT parallel applications. When the device parameters cannot be changed, some drive compensation control can make up for the influence of device differences on dynamic current-sharing, and the key to this method is accurately identifying the characteristic parameters of the IGBT module. The influence of parameter (e.g., gate resistance) identification accuracy differences on the dynamic current-sharing characteristics is studied when a synchronous pulse-asynchronous drive method is used. The correlation characteristics of characteristic parameters of IGBT devices are studied, and the characteristic models of each parameter and influencing variables are constructed. The working model of PSpice device parallel switch is established, and the variation curve of IGBT device parameters and influence factors is fitted by combining with the device manual data comparison and multi-working condition test parameter correction. Through the parallel switching characteristic experiments on two groups of modules 1 200 V/200 A and 1 700 V/300 A IGBT, the judgment on the influence of the difference in IGBT characteristic parameters on parallel current-sharing was verified. Finally, the influence of the difference in characteristic parameter identification accuracy on dynamic current-sharing characteristics was summarized.
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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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