Digital Controlled Three-Phase Two-Switch CCM Boost Rectifier

Abstract

Conventional three-phase two-switch DCM boost rectifier is suitable for low-cost front-end PFC converters due to their simplicity low component counts and low cost However due to the operation in DCM mode there are obvious shortcomings in high power applications Therefore in this thesis a control method that can operate the CCM mode in a three-phase two-switch DCM boost rectifier is proposed Make the converter available for higher power applications In this thesis the types of three-phase PFC converters and common control methods are first discussed Then the control strategy and operating principle of the converter are analyzed and the control flow of the digital single processor is explained Finally through the digital signal processor a three-phase rectifier with an input phase voltage of 220 V an output voltage of 800 V and a rated power of 10 000 W is developed From the experimental results the efficiency can reach 95 6% and the power factor value is 0 956 at the maximum output power

Date of Award	2019
Original language	English
Supervisor	Jiann-Fuh Chen (Supervisor)