摘要:基于DSP變頻器抗電磁干擾,其硬件含接口電路、總線、印制電路板抗干擾措施及功率輸出電磁兼容設(shè)計(jì)。軟件抗干擾則包括利用陷阱防止干擾造成的亂序現(xiàn)象擴(kuò)展, 利用時(shí)間冗余屏蔽干擾信號(hào),及特定編碼容錯(cuò)、指令冗余、標(biāo)志法及數(shù)字濾波等技術(shù)
關(guān)鍵詞:變頻器; 電磁干擾;硬件抗干擾;軟件抗干擾
[b][align=center]Anti—Electromagnetic Interference Based on DSP Transducer
LU Fan—xing 一,LIU Yong ,Li Zhen—kai ,LU Yi—min
(1.Academy of Applied Science,Jiangxi University of Science& Technology,Ganzhou 341000,China;
2.Dept.of Electron& Information,Huazhong University of Science&Technology,Wuhan 430074,China)[/align][/b]
Abstract:Based on DSP transducer,hardware of anti—electromagnetic interference includes interface circuit,bus,anti-jamming measure of printed circuit board,and electromagnetic compatible design of power output.Software anti-jamming design includes making use of trap tO prevent desequencing expansion;adopting time redundancy to screen jamming signal,special coding fault tolerance,instruction redundancy,symbol method,digital filtering and SO on.
Keywords:Transducer;Electromagnetic interference;Hardware anti-jamming;Software anti-jamming
0 引言
電磁干擾源分為信息傳導(dǎo)干擾源和電磁噪聲傳導(dǎo)干擾源。信息傳導(dǎo)干擾源指無(wú)用信息對(duì)模擬通道的干擾。電磁噪聲傳導(dǎo)干擾源是不帶信息的電磁噪聲對(duì)變頻系統(tǒng)的干擾。傳導(dǎo)電磁干擾傳輸通道分為電容、電阻及電感等傳導(dǎo)耦合。電容傳導(dǎo)耦合指干擾源和信號(hào)傳輸線間通過導(dǎo)線及部件的電容交鏈構(gòu)成的電磁傳導(dǎo)耦合。電阻傳導(dǎo)耦合指干擾源和信號(hào)傳輸線間通過公共阻抗上電流或電壓交鏈構(gòu)成的傳導(dǎo)電磁耦合,即磁場(chǎng)耦合?;贒SP數(shù)字變頻器中, 電阻和電感傳導(dǎo)耦合尤為明顯。包括瞬態(tài)脈沖干擾對(duì)數(shù)字電路的影響、分布電感、電容對(duì)信號(hào)的影響、電源對(duì)系統(tǒng)的影響等。在此探討基于DSP變頻調(diào)器的電磁干擾及其解決方法。
[b][align=center]詳細(xì)內(nèi)容請(qǐng)點(diǎn)擊:
基于DSP變頻器的抗電磁干擾[/align][/b]