Premium
Current reduction method for dual active bridge converter in nonlinear dead‐time compensation method
Author(s) -
Kawauchi Kengo,
Higa Hayato,
Watanabe Hiroki,
Kusaka Keisuke,
Itoh JunIchi
Publication year - 2021
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.23282
Subject(s) - inductor , control theory (sociology) , compensation (psychology) , voltage , nonlinear system , current (fluid) , offset (computer science) , engineering , reduction (mathematics) , power (physics) , electronic engineering , computer science , electrical engineering , mathematics , physics , psychology , geometry , control (management) , quantum mechanics , artificial intelligence , psychoanalysis , programming language
This paper proposes a control method for a dual active bridge (DAB) converter, which achieves both a reduction in the nonlinear transmission power error due to the dead‐time and a reduction in the inductor current with a three‐level operation. The nonlinear transmission power error is compensated by designing a zero current period in the inductor current with the three‐level operation. In addition, an inductor current reduction method for the three‐level operation is also proposed. In the nonlinear transmission power error compensation method, the inductor current is reduced by suppressing the circulating current by considering the zero‐current period to be the dead‐time. The validity of the proposed method is confirmed using a 2.0‐kW prototype. The experimental results show that the transmission power error is reduced by up to 85.1%. In addition, the inductor current is reduced by up to 64.1% and the loss is reduced by up to 58.6%. Moreover, the DC offset is eliminated by utilizing the voltage polarity reverse phenomenon in the voltage control.