Abstract
This paper examines the characteristics of the zero voltage switching (ZVS) and zero voltage transition (ZVT) soft-switching applied in the 3-phase current fed dual active bridge (3P-CFDAB) converter, which combines the advantages of the dual active bridge (DAB) converter and current-fed full bridge (CFFB) converter. When an active clamp circuit is added to the CFFB converter, the circuit configuration of the DAB converter is shown in part of the entire circuit. This allows the use of pulse width modulation (PWM) techniques which combine the PWM techniques of both the DAB converter and CFFB converter. The proposed converter performs both duty and phase control at the same time in order to reduce the circulating current and ripple current of the output capacitor, which are the disadvantages of the CFFB converter and DAB converter. In addition, the ZVS and ZVT soft switching areas were analyzed by means of the phase current and leakage inductor current in each transformers. To verify the principle and feasibility of the proposed operation techniques, a simulation and experiment were implemented with the 3P-CFDAB.
Highlights
In recent years, electrical vehicle (EV) and hybrid electrical vehicle (HEV) manufacturers have increased the capacity of their batteries in order to improve the mileages of their vehicles
This paper proposes of a DC-link applied in75a bidirectional isolated 3P-CFDAB converter
The method of designing the leakage inductance and the transformer were analyzed in terms of the operation modes during each charge release of the 3P-CFDAB converter
Summary
Electrical vehicle (EV) and hybrid electrical vehicle (HEV) manufacturers have increased the capacity of their batteries in order to improve the mileages of their vehicles. A two-quadrant charger has been studied for EV charger It uses two active switches, is capable of bidirectional power transfer, and has a relatively simple configuration of gate driver and control circuit. A topology that enables bidirectional power control without the use of an output stage inductor and active clamp circuit is the DAB converter. It is difficult to reduce the circulating current, because doing so requires an active clamp circuit that can discharge the stored energy of the transformer of the leakage inductor during the discharge, as in the bidirectional full-bridge converter. Q1, Q3, Q5, and consist of the active clamp circuit of the current fed full bridge converter in order to compensate for secondary sides are coupled with 3-phase delta-typed connection transformer.
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