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更新時間：2025.01.04
有源箝位零電壓開關(guān)三相PFC變換器及其零電壓開關(guān)-空間矢量調(diào)制策略

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頁數(shù)： 9頁

In three-phase PFC converter,there exist severe switch anti-parallel diode reverse recovery problems.The effective measures of Compound Active-clamping and Minimum Voltage Active-clamping techniques in single phase PFC are extended to three-phase PFC.A family of Active-clamping ZVS soft switching PFC converter is got. They can effectively suppress the diode reverse recovery, and realize ZVS for all the switches. In order to reduce the number of the auxiliary switches, A ZVS space vector modulation (ZVS-SVM)is proposed. It uses only one auxiliary switch and can realize ZVS for all the switches. The switching frequency of the main switch and the auxiliary switch is fixed, thus the input current waveform is good.The theory has been illustrated by the compound active-clamp (CAC) three phase PFC. One DSP controlled 4kW PFC converter prototype with CAC is implemented.

移相控制零電壓開關(guān)三電平弧焊電源研究

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頁數(shù)： 3頁

提出了一種新穎的移相控制零電壓開關(guān)三電平變換器,分析了該變換器的工作原理,并給出了移相控制電路和驅(qū)動電路。最后利用該變換器研制出一最大輸出為120A的弧焊電源,并給出了試驗波形和電源的實測外特性波形。

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