Design and Simulation Analysis of Intercell Transformer based on Five-level T-type Inverter

Abstract

To improve the power density of the five-level T-type inverter, a three-phase intercell transformer (ICT) is proposed. The three-phase ICT is the integration of three separate coupled inductors of the proposed inverter on a single core. The ICT created by the coupled inductor often does not alter the output current but does lessen the current ripple in the windings. It also reduces losses, and with the smaller size, the power factor of the ICTs can be much higher than that of the inductor. The paper analyzes the structure of the six coil core, and an equivalent model of the magnetic circuit is established. The method was optimally analyzed by coupled simulation of Maxwell and Simplorer. Furthermore, this result is further verified in the PSIM simulation.