Energy Feedback Electronic Load Based on Topology of Three-level Inverter

Three-level inverter has the advantages of high output power quality, low harmonic content and low switching loss. The traditional energy feedback electronic load can be realized by dual PWM rectifier, that is, it is composed of PWM rectifier Bridge and PWM inverter bridge. If a three-level inverter can be applied to the electronic load PWM inverter bridge link, the switching loss can be reduced and the quality of output power can be improved. This thesis introduces the main circuit topology and working principle of the energy feedback load, and proposes an electronic load composed of three-level PWM inverter bridge, and proposes a new modulation process.