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Press-pack insulated gate bipolar transistor (PP-IGBT) modules are widely used in high-power applications such as flexible DC converter valves owing to their superior electrical performance and reliability. Therefore, an accurate observation of the junction temperature of a IGBT chip is important for monitoring its operating status and evaluating its remaining lifetime. The existing junction temperature observation methods are mostly designed for bonded-lead IGBTs, which cannot be applied directly because the characteristics of PP modules are not taken into account. Aimed at the PP IGBTs in large-capacity converter valves, a practical method for calibrating the on-state voltage drop and junction temperature of modules is proposed, and the online estimation error of junction temperature is comprehensively analyzed. Then, a junction temperature calibration scheme is designed based on a 5SNA 3000K452300 PP IGBT module(4 500 V, 3 000 A) produced by ABB, including experimental circuits, temperature calibration range selection, junction temperature control method, measurement circuits and calibration experimental procedure. Finally, based on a pulse test platform, the proposed method was verified. Experimental results show that the junction temperature calibration and observation scheme proposed was effective, the junction temperature observation error was within ±5 °C, and it can be applied to the case of differences in PP IGBT modules.
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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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