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This paper presents a full-order equivalent circuit model of Dual Active Bridge (DAB) converter. The proposed equivalent circuit facilitates the in-depth knowledge on the physical insight of DAB converter and can precisely retain both the steady state and dynamic behavior of the original system. This equivalent circuit can be divided into two parts: ac branch and dc branch. Both ac branch and dc branch...
The dual active bridge (DAB) topology has been widely used in the industrial field, especially when bidirectional power transfer is required. However, the efficiency improvement of DAB converters is facing challenges and it is worthwhile devoting much effort to it. This paper presents a novel model based on the triple phase shift (TPS) modulation scheme to improve the efficiency of the dual active...
The triple phase shift (TPS) modulation scheme, which provides three control handles, is of great importance for the optimized operation of dual active bridge (DAB) isolated bidirectional dc-dc converter. This paper studies the optimal modulation scheme of DAB converter based on TPS modulation scheme with respect to minimal RMS value of inductor current. The concept of global optimal condition (GOC)...
A common duty ratio control method, which features zero voltage switching for all devices of input inverting H bridge and zero current switching for all devices of output rectifying H bridge, for series resonant dual active bridge converter is proposed in this paper. The detailed operation principles of the common duty ratio control method are presented. Moreover, the steady state of the converter...
PWM control method is an important method for the optimization operation of Dual Active Bridge (DAB) converter. The traditional way which is used to analyze PWM control is not precise and comprehensive. This paper gives the accurate calculation of power flow and RMS value of inductor current by proposing a novel method. Six modes are analyzed based on the control signal distributions. Finally, the...
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