Abstract

There is an increasing demand for efficient and low-profile power converters in almost all industrial applications. Some require stable performance over a wide range of input voltages, whereas others require converters with a stable performance over a wide range of output voltages. In this regard, little work has been done to combine both requirements into one solution. This work suggests a unique solution that addresses both requirements at once. A power converter with 2×3 reconfigurable modes has been presented, able to operate with DC gains of 1, 2 and 4, which can be further extended to 8. The converter shows stable performance for the extended range of both input and output voltage. The flexible reconfigurable feature of the proposal can be applied in a variety of applications. Two reconfigurable modes on the input side can be configured following the variation in the line voltage to maintain a stable performance, and three reconfigurable modes for the output voltage, which raises the output voltage from 24V to 48V and 96V. The proposal is applied in an example application of a phase shifted full bridge converter. The converter is characterized for \textV <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">in</sub> =100-400V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">dc</sub> , \textP <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">out</sub> = 1kW.

Highlights

  • Wide range power converters are receiving attention in a broad range of industrial applications, like server stations, DC grids, photovoltaics, electric vehicles and supercapacitors

  • The proposal has been verified in an example application of a phase shifted full bridge (PSFB) converter, where the converter is characterized for an input voltage of 100-400V and up to the load power of 1kW

  • The proposed concept has been successfully demonstrated in an example application of a power converter

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Summary

INTRODUCTION

Wide range power converters are receiving attention in a broad range of industrial applications, like server stations, DC grids, photovoltaics, electric vehicles and supercapacitors. To meet the requirement of a wide range of output voltage, multiple power converters are usually stacked together, which increases the cost and complexity of the system [12] It degrades the reliability and efficiency of the overall system. This work introduces a novel concept of a five distinct mode isolated power converter This one size fits all flexible solution can be implemented either in wide input-range applications or in wide-output range applications. The proposal has been verified in an example application of a phase shifted full bridge (PSFB) converter, where the converter is characterized for an input voltage of 100-400V and up to the load power of 1kW To simplify, both wide input and wide output characteristics have been investigated separately. Stable, (2) the flexible reconfigurable structure simplifies implementation for a variety of applications, (3) the gain of the converter can be raised to eight and (4) the use of series transformers simplifies heat management

CIRCUIT DESCRIPTION
EXTENSION OF THE INPUT RANGE
Operation of mode-4
Operation of mode-5
DC Gain of the converter
DESIGN CONSIDERATIONS
Current Considerations
Consideration of the Output Control Section
Control Strategy
Considerations of Mode Switchover
Loss Considerations
Comparison with Conventional Converters
EXPERIMENTAL INVESTIGATIONS
Extension of Input Range
Extension of Output Range
CONCLUSION
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