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| Comprehensive Modeling and Multi-Objective Optimization Method for Coupled Inductors of Interleaved Boost Converters |
| Ma Xiaoyong, Wang Ping, Wang Yifeng, Tao Long, Yang Shaoqi |
| School of Electrical and Information Engineering Tianjin University Tianjin 300072 China |
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Abstract This paper proposes a comprehensive modeling and multi-objective optimization method for coupled inductors of high-power interleaved boost converters to realize the dual optimization of inductor volume and converter efficiency. Firstly, based on the constraint on input current ripples, the mathematical model is established for the electrical parameters of coupled inductors. Secondly, the windings layout of a traditional E-type coupled inductor is optimized, and an inductor design scheme with equal windings is proposed. Then, a comprehensive model for inductor volume and converter efficiency is established with key parameters of coupled inductors (switching frequency, coupling coefficient and core cross-sectional area) as design variables. Based on the comprehensive model, Pareto-fronts of efficiency and inductor volume are obtained via iterative operation of design variables, thus providing a theoretical basis for multi-objective optimization of coupled inductors. Finally, a 20kW experimental prototype based on coupled and non-coupled inductors was produced. The results show that the maximum efficiency of the experimental prototype with coupled inductors is 98.43%, which is 0.21% higher than that with uncoupled inductors, and inductor volume decreases by 32% after coupling.
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Received: 25 April 2022
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2022, Vol. 37 
