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更新時間：2025.06.07
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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大?。?span class="single-tag-height">774KB

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.

空間矢量調(diào)制技術(shù)使防爆電機保持“涼爽”

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2003年，著名的ATEX防爆指令在歐洲得到廣泛推行(2003年6月30日，著名的歐州ATEX防爆指令94／9／EC已進入強制執(zhí)行階段。該指令規(guī)定了爆炸性環(huán)境下使用的電氣及非電氣設(shè)備必須履行ATEX防爆檢驗程序，并通過CE認證后才能投放歐洲市場)，其重要原因之一是制造業(yè)各部門危險區(qū)域的不斷增加。最近一項評估結(jié)果顯示，約50％的工業(yè)部門存在至少一塊某種類型的危險區(qū)域。

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