Open AccessEquivalent temperature estimation‐based FCS‐MPC for thermal stress balance of 3L‐NPC traction inverter
Author(s) -
Peng Tao,
Xu Yansong,
Yang Chao,
Xie Feiran,
Tao Hongwei,
Yang Chunhua
Publication year - 2021
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/pel2.12182
Subject(s) - control theory (sociology) , inverter , traction (geology) , model predictive control , junction temperature , set point , energy balance , reliability (semiconductor) , voltage , computer science , engineering , thermal , control engineering , control (management) , electrical engineering , physics , mechanical engineering , power (physics) , quantum mechanics , artificial intelligence , meteorology , thermodynamics
This paper proposes an equivalent temperature estimation‐based finite control set model predictive control (ETE‐FCS‐MPC) method to balance the thermal stress among transistors in three level neutral point clamp (3L‐NPC) traction inverters, which can be used to prolong the whole service life and improve the reliability of the traction inverter. Compared with other methods, the proposed ETE‐FCS‐MPC method requires lesser calculation without additional sensor. Firstly, an energy loss‐based equivalent temperature estimation method is proposed to avoid the complexity of junction temperature prediction. Secondly, an energy variance‐based thermal stress balance control objective is introduced. Then, a normalized evaluation function is established to select the optimal switching state. Finally, the effectiveness of this method is verified on hardware‐in‐the‐loop tests.