| Summary: | 碩士 === 國立成功大學 === 電機工程學系 === 107 === 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.
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