本文關(guān)鍵詞：普適電壓范圍的單相PFC變換器研究及其優(yōu)化設(shè)計(jì)　出處：《浙江大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 功率因數(shù)校正 Boost變換器 碳化硅 電磁兼容 傳導(dǎo)電磁干擾

【摘要】：功率因數(shù)校正(PFC)變換器廣泛的應(yīng)用在各種電力電子設(shè)備中,通過PFC變換器來改善電能品質(zhì),增強(qiáng)設(shè)備可靠性,是解決電力電子裝置對(duì)電網(wǎng)造成電流諧波污染的重要手段。本文以傳統(tǒng)Boost PFC變換器為例,詳細(xì)介紹了 PFC電路的工作原理,效率損耗分布,以及其傳導(dǎo)EMI的相關(guān)特性,并設(shè)計(jì)了實(shí)用的功率因數(shù)校正電源。首先,本文根據(jù)現(xiàn)有的文獻(xiàn)資料,分析了現(xiàn)有的PFC電路的結(jié)構(gòu)、特點(diǎn)以及控制方法,基于成本等綜合考慮選用了 BoostPFC電路。在其基礎(chǔ)上,對(duì)橋式BoostPFC電路的關(guān)鍵參數(shù)設(shè)計(jì)方法進(jìn)行了分析,并給出了設(shè)計(jì)結(jié)果;針對(duì)PFC的電感,給出了詳細(xì)的設(shè)計(jì)過程。對(duì)PFC電路進(jìn)行了詳細(xì)的損耗分析,建立了主要元件的損耗模型,并通過實(shí)驗(yàn)驗(yàn)證了模型的準(zhǔn)確性。給出了兩種提高PFC電路效率的方法,并搭建了實(shí)驗(yàn)電路驗(yàn)證了分析的有效性。其次,本文敘述了電磁兼容的相關(guān)概念,分析了 BoostPFC變換器傳導(dǎo)EMI的特性。本文將Boost PFC電路中MOSFET開關(guān)管在開斷時(shí)的漏源電壓,看作差模干擾和共模干擾的干擾源,分析了差模干擾和共模干擾的傳播路徑。分析了在BoostPFC變換器的整流橋前后分別增加差模電容對(duì)混合干擾的抑制作用,并給出了差模干擾和共模干擾的等效電路,推導(dǎo)出了差模和共模的電壓傳輸增益。對(duì)比了單級(jí)和兩級(jí)濾波器的結(jié)構(gòu)和相關(guān)特性,并給出了 BoostPFC電路的濾波器設(shè)計(jì)方法。最后,本文分析了PFC電路散熱設(shè)計(jì)的必要性,給出了樣機(jī)散熱設(shè)計(jì)分析和結(jié)構(gòu),并制作了樣機(jī)。在115V輸入下,整機(jī)效率可以達(dá)到94%,電流諧波滿足相關(guān)標(biāo)準(zhǔn)。實(shí)驗(yàn)結(jié)果驗(yàn)證樣機(jī)具有高可靠性、高功率因數(shù)以及高效率等優(yōu)良性能,說明了本文中設(shè)計(jì)的有效性。
[Abstract]:Power Factor Correction (PFC) converters are widely used in various power electronic devices. PFC converters are used to improve power quality and enhance equipment reliability. This paper takes the traditional Boost PFC converter as an example, introduces the working principle and efficiency loss distribution of the PFC circuit in detail. And the related characteristics of its conduction EMI, and designed a practical power factor correction power supply. Firstly, according to the existing literature, this paper analyzes the structure, characteristics and control methods of the existing PFC circuit. The BoostPFC circuit is selected based on cost and so on. On the basis of it, the design method of key parameters of bridge BoostPFC circuit is analyzed, and the design results are given. For the inductance of PFC, the detailed design process is given. The loss model of the main components is established by analyzing the loss of the PFC circuit in detail. The veracity of the model is verified by experiments. Two methods to improve the efficiency of PFC circuits are given, and the experimental circuits are built to verify the effectiveness of the analysis. Secondly, the related concepts of electromagnetic compatibility are described in this paper. The characteristics of BoostPFC converter conducting EMI are analyzed. In this paper, the leakage voltage of the MOSFET switch on the BoostPFC circuit is analyzed. It is regarded as an interference source of differential mode interference and common mode interference. The propagation paths of differential mode interference (DMI) and common-mode interference (CMI) are analyzed, and the suppression of mixed interference by increasing the differential mode capacitance (DMI) before and after the rectifier bridge of BoostPFC converter is analyzed. The equivalent circuit of differential mode interference and common mode interference is given, and the voltage transmission gain of differential mode and common mode is deduced. The structure and correlation characteristics of single and two stage filters are compared. The filter design method of BoostPFC circuit is given. Finally, the necessity of heat dissipation design of PFC circuit is analyzed, and the design analysis and structure of prototype heat dissipation are given. The prototype is made. Under the input of 115V, the efficiency of the whole machine can reach 94 and the current harmonics meet the relevant standards. The experimental results show that the prototype has good performance such as high reliability, high power factor and high efficiency. The effectiveness of the design in this paper is illustrated.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TM46

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本文編號(hào)：1381102