【摘要】：在工業(yè)中,調(diào)速電氣傳動系統(tǒng)是目前使用十分普遍的一種傳動系統(tǒng),特別是交流的變頻調(diào)速,由于其節(jié)能顯著、保護完善控制性能好、過載能力強、使用維護方便等優(yōu)點,被迅速發(fā)展起來。在我國變頻調(diào)速己經(jīng)進入實用和推廣階段,但是變頻調(diào)速系統(tǒng)的電磁騷擾(干擾)問題已經(jīng)成為進一步推廣使用的難點,越來越成為行業(yè)關(guān)注的焦點。本文詳細分析了變頻器傳導(dǎo)騷擾的產(chǎn)生的原理,闡述了傳導(dǎo)騷擾中差模騷擾和共模騷擾的耦合途徑。對變頻器的騷擾源進行了騷擾頻譜分析,在騷擾頻譜分析的基礎(chǔ)上給出了降低傳導(dǎo)騷擾的方法。在設(shè)計變頻器的EMI濾波器時,先使用差模抑制網(wǎng)絡(luò)將騷擾信號分離為差模信號和共模信號,然后通過已知的參量之間的關(guān)系,計算得出差模頻譜。根據(jù)分離的結(jié)果以及IEC 61800-3的規(guī)定,以中達電子生產(chǎn)的VFD220BH43E型變頻器為例,分別設(shè)計變頻器的EMI濾波器的差模參數(shù)和共模參數(shù)。在濾波器參數(shù)設(shè)計好后,還需要考慮濾波器無源器件的寄生參數(shù)以及這些器件之間的相互耦合,然后采取適當(dāng)?shù)拇胧┘右愿倪M。對于電容的寄生電感,本文采用一種帶中間抽頭的電感線圈繞線結(jié)構(gòu),利用它的反向的耦合電感達到抵消電容的寄生電感的目的;對于電感的寄生電容,采用增大線圈與磁芯、線圈匝與匝之間的距離來減小寄生電容效應(yīng)。對于無源器件之間的耦合效應(yīng)的影響,采用改變線圈繞線結(jié)構(gòu)、屏蔽電容等方法改善。最終的實驗結(jié)果證明了采取措施后的濾波器高頻特性得到了很大的改善,可以滿足EMC限值要求,也驗證了消除耦合參數(shù)和寄生參數(shù)的方法是有效的。
[Abstract]:In industry, the speed regulation electric drive system is a kind of drive system which is widely used at present, especially the AC frequency conversion speed control system. Because of its remarkable energy saving, good protection and perfect control performance, strong overload ability, convenient operation and maintenance, etc. Was rapidly developed. In our country, the frequency conversion speed regulation has already entered the practical and popularized stage, but the electromagnetic disturbance (interference) problem of the frequency conversion speed regulation system has become the difficulty of further popularizing and using, and has become the focus of the industry more and more. In this paper, the principle of inductive disturbance in frequency converter is analyzed in detail, and the coupling way of differential mode disturbance and common mode disturbance in conduction disturbance is expounded. The disturbance spectrum of the frequency converter is analyzed, and the method of reducing the conduction disturbance is given on the basis of the disturbance spectrum analysis. In designing the EMI filter of the converter, the disturbance signal is separated into the differential mode signal and the common mode signal by using the differential mode suppression network, and then the travel mode spectrum is calculated by the relationship between the known parameters. According to the result of separation and the stipulation of IEC 61800-3, the differential mode parameters and common mode parameters of the EMI filter of the converter are designed by taking the VFD220BH43E inverter produced by Zhonda Electronics as an example. After the design of filter parameters, the parasitic parameters of filter passive devices and their mutual coupling should be considered, and then appropriate measures should be taken to improve them. For the parasitic inductance of capacitance, a coil winding structure with intermediate tap is adopted in this paper, and its reverse coupling inductance is used to counteract the parasitic inductance of capacitance, and the parasitic capacitance of inductance is increased by increasing coil and magnetic core. The distance between coil turns and turns to reduce parasitic capacitance effect. For the influence of coupling effect between passive devices, the coil winding structure and shielding capacitance are improved. The experimental results show that the high frequency characteristic of the filter is greatly improved, which can meet the EMC limit, and the method of eliminating the coupling parameters and parasitic parameters is effective.
【學(xué)位授予單位】：蘇州大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TM921.51;TN713

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