Three-Phase AC/DC Quasi-Single-Stage Isolated Resonant PFC Converter With Integrated Transformer

Three-Phase AC/DC Quasi-Single-Stage Isolated Resonant PFC Converter With Integrated Transformer

WoS Article

Converters that produce an isolated dc output from a three-phase mains supply are often required. Moreover, input power factor correction (PFC) functionality is essential. A standard two-stage conception with ac/dc and dc/dc converters may be used. However, a single-stage or quasi-single-stage solution can simplify the circuitry and increase efficiency; therefore, many variants of single-stage converters have been researched and published. This paper introduces a novel quasi-single-stage resonant topology with an integrated transformer. Additionally, an original control structure is proposed. This converter enables full control over the output dc voltage and current. Another benefit of the proposed converter is a relatively low complexity of its power circuit and control compared to other single-stage converters. The operation principle of the power circuit is explained and the control strategy is also analyzed in detail. A description of the integrated transformer together with aspects of the resonant circuit design are presented. A simulation of the entire converter was performed and evaluated. Furthermore, a test-bench prototype was designed and constructed and is outlined in this paper. The test-bench measurement results are provided and compared to the simulation results. Power factor and efficiency measurements in terms of their dependence on the output voltage and current are included.

Converters that produce an isolated dc output from a three-phase mains supply are often required. Moreover, input power factor correction (PFC) functionality is essential. A standard two-stage conception with ac/dc and dc/dc converters may be used. However, a single-stage or quasi-single-stage solution can simplify the circuitry and increase efficiency; therefore, many variants of single-stage converters have been researched and published. This paper introduces a novel quasi-single-stage resonant topology with an integrated transformer. Additionally, an original control structure is proposed. This converter enables full control over the output dc voltage and current. Another benefit of the proposed converter is a relatively low complexity of its power circuit and control compared to other single-stage converters. The operation principle of the power circuit is explained and the control strategy is also analyzed in detail. A description of the integrated transformer together with aspects of the resonant circuit design are presented. A simulation of the entire converter was performed and evaluated. Furthermore, a test-bench prototype was designed and constructed and is outlined in this paper. The test-bench measurement results are provided and compared to the simulation results. Power factor and efficiency measurements in terms of their dependence on the output voltage and current are included.

Isolated power factor correction (PFC) source, magnetic-combination transformer, phase-shift control, resonant converter, quasi-single-stage converter, three-phase ac/dc converter, wide output voltage range.

Isolated power factor correction (PFC) source, magnetic-combination transformer, phase-shift control, resonant converter, quasi-single-stage converter, three-phase ac/dc converter, wide output voltage range.

MARTIŠ, J.; VOREL, P.; TOMÁNEK, R.; BAUER, P.

2025

30.05.2024

IEEE

Piscataway, USA

2644-1314

IEEE Open Journal of Power Electronics

5

1

United States of America

837

851

15

https://ieeexplore.ieee.org/document/10542376

http://hdl.handle.net/11012/252548

2024-Martis