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Energies 2017, 10(7), 891;

Loss Characteristics of 6.5 kV RC-IGBT Applied to a Traction Converter

School of Electrical Engineering, Beijing Jiaotong University, No. 3 Shangyuancun, Beijing 100044, China
Author to whom correspondence should be addressed.
Academic Editor: Tomonobu Senjyu
Received: 15 May 2017 / Revised: 2 June 2017 / Accepted: 21 June 2017 / Published: 1 July 2017
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6.5 kV level IGBT (Insulated Gate Bipolar Transistor) modules are widely applied in megawatt locomotive (MCUs) traction converters, to achieve an upper 3.5 kV DC link, which is beneficial for decreasing power losses and increasing the power density. Reverse Conducting IGBT (RC-IGBT) constructs the conventional IGBT function and freewheel diode function in a single chip, which has a greater flow ability in the same package volume. In the same cooling conditions, RC-IGBT allows for a higher operating temperature. In this paper, a mathematic model is developed, referring to the datasheets and measurement data, to study the 6.5 kV/1000 A RC-IGBT switching features. The relationship among the gate desaturated pulse, conducting losses, and recovery losses is discussed. Simulations and tests were carried out to consider the influence of total losses on the different amplitudes and durations of the desaturated pulse. The RC-IGBT traction converter system with gate pulse desaturated control is built, and the simulation and measurements show that the total losses of RC-IGBT with desaturated control decreased comparing to the RC-IGBT without desaturated control or conventional IGBT. Finally, a proportional small power platform is developed, and the test results prove the correction of the theory analysis. View Full-Text
Keywords: reverse conducting IGBT; traction converter; gate desaturation control; converter loss reverse conducting IGBT; traction converter; gate desaturation control; converter loss

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Huang, X.; Ling, C.; Chang, D.; You, X.; Zheng, T.Q. Loss Characteristics of 6.5 kV RC-IGBT Applied to a Traction Converter. Energies 2017, 10, 891.

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