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更新時(shí)間：2025.04.12
有源箝位零電壓開(kāi)關(guān)三相PFC變換器及其零電壓開(kāi)關(guān)-空間矢量調(diào)制策略

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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(jī)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(jìn)入強(qiáng)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(yàn)程序，并通過(guò)CE認(rèn)證后才能投放歐洲市場(chǎng))，其重要原因之一是制造業(yè)各部門(mén)危險(xiǎn)區(qū)域的不斷增加。最近一項(xiàng)評(píng)估結(jié)果顯示，約50％的工業(yè)部門(mén)存在至少一塊某種類型的危險(xiǎn)區(qū)域。

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