Modelling and control of a triple‐active‐bridge converter

Zou, Shenli; Lu, Jiangheng; Khaligh, Alireza

doi:10.1049/iet-pel.2019.0920

Cited by 34 publications

(8 citation statements)

References 22 publications

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“…The two most crucial design considerations are increasing energy efficiency and running DAB converters at a fast-switching frequency to achieve high power density. Extensive research has been conducted to explore novel control approaches that can expand the soft switching range to enhance the energy efficiency of a DAB converter [8]. Several algorithms, forms, procedures, and analytical techniques have been suggested to build transformers with high efficiency [9].…”

Section: Introductionmentioning

confidence: 99%

Analysis of Losses in a Three-Port High-Frequency Transformer Under Different Frequencies and Load Conditions

Arizaga,

Ramirez,

Alcalá

et al. 2024

Preprint

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Conventional transformers exhibit losses due to their intrinsic electrical resistance. In contrast, high-frequency transformers provide the advantage of notably decreasing these losses due to the significantly lower currents flowing through the conductors. Moreover, in high-frequency transformers, the losses in the magnetic cores are often reduced because of decreased eddy currents and hysteresis. This article analyzes the losses incurred by a multiport transformer due to fluctuations in operation frequencies and loads applied to its outputs. An analysis of voltage drop variations is conducted under two distinct circumstances. In the first case, there are two load ports and one power supply port. In the second situation, one of the ports is converted into a power source, creating a transformer with two inputs and one output. An extensive analysis of the high-frequency core’s behavior is conducted, which includes a meticulous assessment of hysteresis losses and operational conditions for each scenario. This study entails a quantitative assessment of variations under different load conditions. Three-dimensional (3-D) finite element experimental measurements and finite element analysis (FEA) findings 1 are employed to demonstrate the above instances. This work analyzes how various transformer topologies, including the triple active bridge (TAB), affect the physical and electrical properties. Consequently, it enhances understanding and enables more efficient design of these devices for power electronic transformers (PET).

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Section: Introductionmentioning

confidence: 99%

Analysis of Losses in a Three-Port High-Frequency Transformer Under Different Frequencies and Load Conditions

Arizaga,

Ramirez,

Alcalá

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…This results in volt‐sec balance between the transformer windings, but the regulating range of operation is limited. Reduction in transformer winding current and extension of soft switching range are attained by duty cycle control on all the ports in Zou et al, 19 where generalized harmonic method is adopted for circuit analysis. But analysis of 3PIC based on switch modulation techniques were not extended to different combinations of voltage conversion ratios and a quantitative evaluation of improvement in performance were not yet examined.…”

Section: Introductionmentioning

confidence: 99%

A three‐level three port isolated converter with reduced current stress for DC microgrid applications

Sofiya

Sathyan

2023

Circuit Theory & Apps

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Summary This paper proposes a three‐level three port isolated converter (3L3PIC), which can be employed as an intermediate power conversion circuit for connecting different DC bus voltages in a DC microgrid. This topology utilize half bridge multilevel structure to reduce voltage stress across the transformer windings and the semiconductor switches. Conventionally the power transfer between the ports of a 3PIC were attained by traditional phase‐shift modulation (TPM), but this will impose increased current stress and associated losses in the converter at wide change in voltage conversion ratio. To minimize these losses, this paper introduces a 3L3PIC, that is, by employing dual phase‐shift modulation (DPM) in 3PIC. Steady state analysis of 3L3PIC are presented and derived the power transfer equations between the ports. The current equations through each port are determined at different combinations of voltage conversion ratios. Procedure for obtaining optimized phase‐shift values for both TPM and DPM techniques in 3PIC are explained. A comparison between the modulation schemes in 3PIC is performed and found better results for the DPM technique in terms of reduced current stress, reduced circulating power flow, and extended soft switching region. This in turn leads to a reduction in conduction losses and transformer losses in the converter. A hardware prototype of 1.5 kW 3PIC has been implemented and tested. The experimental results obtained validates with the theoretical analysis.

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“…While the total number of components is less, the proposed converter uses only one secondary, which limits the application to simultaneous charging of batteries of different voltage ratings. Zou et al 21 have modeled a triple active bridge converter to charge two high‐ and one low‐voltage batteries simultaneously. The main objective of the work is to propose a generalized harmonic approximation (GHA) method suitable for all multiport converters, along with a GHA‐based control system for obtaining ZVS and voltage regulation.…”

Section: Introductionmentioning

confidence: 99%

SiC switch‐based isolated DC‐DC converter for simultaneous charging of Li‐ion batteries of different voltage ratings for low‐ and medium‐power electric vehicle battery charging application

B.S

Arunkumar

2023

Circuit Theory & Apps

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SummaryThe use of electric vehicles (EVs) has gained traction in recent years. With the widespread use of EVs in the future, the waiting time before charging will be high due to the use of slow chargers in developing countries. This work proposes a novel DC‐DC converter based on an isolated single‐ended primary inductor converter (SEPIC) and isolated Ćuk converter to enable simultaneous charging of batteries of low‐ and medium‐power EVs. The proposed converter operates without spikes in input and output currents, even during a sudden source disturbance. It can charge one battery at the output voltage level and simultaneously charge two batteries at half the output voltage. Simulation results for open‐loop and closed‐loop operations are provided to validate the converter operation and the simplicity of control. The proposed converter operation has been experimentally validated using a scaled‐down prototype by charging one 48 V lithium‐ion battery and then simultaneously charging two 24 V lithium‐ion batteries. The converter's response is provided to present the novelty and advantages of the proposed converter. The proposed converter uses fewer switches, diodes, inductors, and capacitors. The size of the system is reduced due to the high switching frequency operation of SiC devices. A low‐side gate driver is sufficient for driving the MOSFET, and the control is simple. The proposed converter offers a new and simple converter to charge multiple low‐ and medium‐power EV batteries of different ratings simultaneously with a low component count.

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Modelling and control of a triple‐active‐bridge converter

Cited by 34 publications

References 22 publications

Analysis of Losses in a Three-Port High-Frequency Transformer Under Different Frequencies and Load Conditions

Analysis of Losses in a Three-Port High-Frequency Transformer Under Different Frequencies and Load Conditions

A three‐level three port isolated converter with reduced current stress for DC microgrid applications

SiC switch‐based isolated DC‐DC converter for simultaneous charging of Li‐ion batteries of different voltage ratings for low‐ and medium‐power electric vehicle battery charging application

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