An RLL Current Sharing Snubber for Multiple Parallel IGBTs in High Power Applications

A resistor–inductor–inductor (RLL) snubber is proposed for high-power power electronic devices that use insulated gate bipolar transistors (IGBTs) in parallel. The RLL snubber provides current sharing for parallel IGBTs by utilizing series inductors to decrease the rate of current change in turn-on and turn-off transients. Compared with other methods, the proposed snubber incorporates only passive components without additional sensors or control circuits, which shows its advantages of simple structure, strong applicability, and easy implementation. In order to further expand its application scope, the topologies of RLL snubber for multiple IGBTs in parallel are designed and improved. Experimental results of 5 and 6 parallel IGBTs validate the feasibility and effectiveness of the proposed snubber.

[1]  Yong Li,et al.  Harmonic Resonance Characteristic of Large-Scale PV Plant: Modelling, Analysis, and Engineering Case , 2022, IEEE Transactions on Power Delivery.

[2]  Yun Wang,et al.  A review of wind speed and wind power forecasting with deep neural networks , 2021, Applied Energy.

[3]  Xinbo Ruan,et al.  A Review of Voltage/Current Sharing Techniques for Series–Parallel-Connected Modular Power Conversion Systems , 2020, IEEE Transactions on Power Electronics.

[4]  Bo Zhang,et al.  Embedded Hardware Artificial Neural Network Control for Global and Real-Time Imbalance Current Suppression of Parallel Connected IGBTs , 2020, IEEE Transactions on Industrial Electronics.

[5]  Yang Wang,et al.  A Modified DC Power Electronic Transformer Based on Series Connection of Full-Bridge Converters , 2019, IEEE Transactions on Power Electronics.

[6]  Shahriyar Kaboli,et al.  A Series Stacked IGBT Switch Based on a Concentrated Clamp Mode Snubber for Pulsed Power Applications , 2019, IEEE Transactions on Power Electronics.

[7]  F. Zhuo,et al.  An Integrated Voltage and Current Balancing Strategy of Series-Parallel Connected IGBTs , 2018, 2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia).

[8]  Osami Wada,et al.  Impedance balance control for reduction of common mode noise in full bridge converter , 2015, 2015 International Conference on Electronic Packaging and iMAPS All Asia Conference (ICEP-IAAC).

[9]  M. Sasaki,et al.  Current balancing control for parallel connected IGBTs using programmable gate driver output resistance , 2013, 2013 25th International Symposium on Power Semiconductor Devices & IC's (ISPSD).

[10]  Barry W. Williams,et al.  The application of saturable turn-on snubbers to IGBT bridge-leg circuits , 1999 .

[11]  M. E. Jacobs,et al.  Non-dissipative dynamic current-sharing snubber for parallel connected IGBTs in high power boost converters , 1999, APEC '99. Fourteenth Annual Applied Power Electronics Conference and Exposition. 1999 Conference Proceedings (Cat. No.99CH36285).