Secondary-Side-Regulated Soft-Switching Full-Bridge Three-Port Converter Based on Bridgeless Boost Rectifier and Bidirectional Converter For Multiple Energy Interface

Abstract

A systematic method for deriving soft-switching three-port converters (TPCs), which can interface multiple energy, is proposed in this paper. Novel full-bridge (FB) TPCs featuring single-stage power conversion, reduced conduction loss and low voltage stress are derived. Two non-isolated bidirectional power ports and one isolated unidirectional load port are provided by integrating an interleaved bidirectional Buck/Boost converter and a bridgeless Boost rectifier via a high frequency transformer. The switching bridges on the primary side are shared, hence the number of active switches is reduced. Primary-side pulse width modulation and secondary-side phase shift control strategy are employed to provide two control freedoms. Voltage and power regulations over two of the three power ports are achieved. Furthermore, the current/voltage ripples on the primary-side power ports are reduced due to the interleaving operation. Zero-voltage-switching and zero-current-switching are realized for the active switches and diodes, respectively. A typical FB-TPC with voltage-doubler rectifier developed by the proposed method is analyzed in detail. Operation principles, control strategy and characteristics of the FB-TPC are presented. Experiments have been carried out to demonstrate the feasibility and effectiveness of the proposed topology derivation method.  Index Terms-DC-DC converter, three-port converter, renewable energy, bridgeless boost rectifier, secondary-side regulation. Manuscript

Novel Three-Port Bidirectional DC/DC Converter with Three-Winding Coupled Inductor for Photovoltaic System

“…To demonstrate the performance and feasibility of the proposed converter and understand the advantages and disadvantages of its architecture, this section presents a comparison of the proposed converter with those in the literature. As presented in Table 1, the proposed converter is separately compared with a bidirectional converter [17,21,22] and a three-port converter [23][24][25]. The bidirectional converter in [17] uses a clamp capacitor to reduce the voltage stress and recover stray energy, thereby improving the efficiency of the conversion circuit.…”

“…This technology not only increases the cost, but also increases the conduction loss. Table 2 shows a comparison of the proposed converter with other three-port converters [23][24][25]. The converter in [23] includes an interleaved step-up full-bridge conversion circuit in which switches and diodes are shared to achieve three conversion modes.…”

“…The converter in [23] includes an interleaved step-up full-bridge conversion circuit in which switches and diodes are shared to achieve three conversion modes. The converter in [24] uses two inductors to charge the battery in an interleaved manner; the high-voltage side performs full-bridge rectification using switches, and all switches can enable ZVS. However, the number of components such as switches and diodes is excessively high in the converts proposed in [23] and [24], resulting in a significant increase in cost and volume.…”

“…The converter in [24] uses two inductors to charge the battery in an interleaved manner; the high-voltage side performs full-bridge rectification using switches, and all switches can enable ZVS. However, the number of components such as switches and diodes is excessively high in the converts proposed in [23] and [24], resulting in a significant increase in cost and volume. Owing to output diode blocking, the battery cannot be charged from the output load to achieve bidirectional function.…”

Analysis, Design, Modeling, and Control of an Interleaved-Boost Full-Bridge Three-Port Converter for Hybrid Renewable Energy Systems

“…Moreover, like other phase-shift zero-voltage switching (ZVS) converters, the duty cycle loss issue due to the leakage inductance still occurs. A FB TPC with duty cycle and phase-shift control derived from an interleaved boost-full-bridge (BFB) and a bridgeless boost rectifier is presented in [27]. This topology reduces the input current ripple and current stress of the input ports because of the 180° phase-shift operation of the primary switching legs.…”