The three-phase AC-AC converter is widely used in modern industry. However

in traditional topologies such as back-to-back voltage source converters and matrix converters

the transistors must withstand voltage stress that is no less than the peak value of the input line voltage. Therefore

to reduce the voltage stress on transistors

this paper proposes a novel AC-AC converter topology based on the reconfiguration of a current source rectifier (CSR) and a voltage source inverter (VSI). This topology splits the DC-side freewheeling diode and capacitor of the CSR

connecting the midpoint to the neutral points of the input and output filter capacitors. It establishes the mathematical relationship between the neutral point potential and the CSR modulation ratio

input filter capacitor

and DC bus filter capacitor. Furthermore

an analytical expression for the voltage stress on the CSR transistors is derived

revealing the existence of a minimum value. Therefore

through the proposed optimal parameter configuration and the modified CSR modulation algorithm

the voltage stress on the CSR transistors in the proposed topology is reduced by more than 50.0% compared to traditional converters. Additionally

combining the step-down characteristic of the CSR

the voltage stress on the VSI transistors is reduced by more than 13.4%. Experimental results validate the effectiveness and feasibility of the proposed topology.