A single-stage matrix-type solid-state transformer with reduced switching tubes

Authors

Siwei LIN, School of Electrical Engineering, Southeast University , Nanjing 210096, China
Zhike XU, School of Electrical Engineering, Southeast University, Nanjing 210096, ChinaFollow

Keywords

electrolytic capacitorless; matrix-type topology; reduced switching tubes; SSTs; ZVS

Abstract

This paper presents a single-stage matrix-type solid-state transformer （SM-SST） with reduced switching tubes.In the proposed topology, the power-frequency full bridge shares filter capacitors with high-frequency （HF） half-bridges, which effectively reduces the number of switching tubes and capacitors.The adoption of electrolytic capacitorless matrix-type topology enhances the system ’s potential reliability and power density, achieves instantaneous power balance between the source and load, eliminates ripple power with double grid frequency, and enables inherent power factor correction （PFC） without the need for a current control loop.Additionally, this paper analyzes the zero voltage switching （ZVS） characteristics under time-varying DC bus voltages.As a result, the proposed SM-SST offers advantages of fewer components, lower power losses, and a higher power density.Finally, a 1 kW experimental prototype is constructed and tested to validate the accuracy and feasibility of the proposed method.

DOI

10.19781/j.issn.1673-9140.2025.05.021

First Page

227

Last Page

236

Recommended Citation

LIN, Siwei and XU, Zhike (2025) "A single-stage matrix-type solid-state transformer with reduced switching tubes," Journal of Electric Power Science and Technology: Vol. 40: Iss. 5, Article 21.
DOI: 10.19781/j.issn.1673-9140.2025.05.021
Available at: https://jepst.researchcommons.org/journal/vol40/iss5/21