本文關(guān)鍵詞：可控硅中頻電源啟動(dòng)過程建模與控制參數(shù)優(yōu)化　出處：《重慶大學(xué)》2016年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 可控硅中頻電源 負(fù)載特性 啟動(dòng)建模 啟動(dòng)策略

【摘要】：并聯(lián)諧振型可控硅中頻電源在鍛造行業(yè)中有著重要應(yīng)用,但啟動(dòng)問題一直困擾其性能的提升,為了解決在復(fù)雜工況下電源的啟動(dòng)成功率低與啟動(dòng)性能不夠優(yōu)越的問題,文中基于電源的啟動(dòng)過程與負(fù)載回路特性分析,建立了可控硅中頻電源的啟動(dòng)過程模型,并提出了啟動(dòng)控制參數(shù)的優(yōu)化方法。在課題研究中,主要完成了以下工作:基于對可控硅中頻電源啟動(dòng)過程的剖析,指出了并聯(lián)諧振型電源難于啟動(dòng)的原因,針對性地提出了幾種可能增強(qiáng)啟動(dòng)能力的措施。利用解析法推導(dǎo)了感應(yīng)器等效參數(shù)的計(jì)算公式,同時(shí)分析了等效負(fù)載回路特性,建立了可控硅中頻電源啟動(dòng)過程的數(shù)學(xué)模型。在MATLAB/Simulink環(huán)境中,對所建數(shù)學(xué)模型進(jìn)行了開環(huán)與閉環(huán)系統(tǒng)的階躍響應(yīng)實(shí)驗(yàn),驗(yàn)證了所建立數(shù)學(xué)模型的正確性�；谥蓄l電源的數(shù)學(xué)模型,導(dǎo)出了電源啟動(dòng)控制參數(shù)的選取條件以得到較好的啟動(dòng)性能。針對不同負(fù)載的啟動(dòng)情況,在整流觸發(fā)角選取策略方面,進(jìn)一步推導(dǎo)出了不同負(fù)載衰減因子下電源啟動(dòng)的整流觸發(fā)角范圍,并最終給出了電源啟動(dòng)控制的步驟�；贛ATLAB/Simulink的仿真平臺(tái),建立了適合具有初始能量的中頻電源啟動(dòng)仿真模型,在優(yōu)選后的控制參數(shù)下與不同衰減因子時(shí)整流角選取條件下,分別做了啟動(dòng)仿真實(shí)驗(yàn),驗(yàn)證了啟動(dòng)控制參數(shù)優(yōu)選條件與啟動(dòng)策略的正確性。仿真實(shí)驗(yàn)結(jié)果表明,文中提出的中頻電源數(shù)學(xué)模型與啟動(dòng)控制參數(shù)優(yōu)選策略是合理的,并較負(fù)載串并聯(lián)啟動(dòng)與IGBT輔助橋啟動(dòng)方法具有更強(qiáng)的啟動(dòng)能力。所建立的電源系統(tǒng)數(shù)學(xué)模型,對研究中頻電源的后續(xù)問題,如電源控制、電能質(zhì)量改善等,具有一定的參考價(jià)值。
[Abstract]:Parallel resonant thyristor intermediate frequency power supply has an important application in the forging industry, but the startup problem has been puzzling its performance improvement. In order to solve the problem of low success rate and insufficient performance of power supply under complex operating conditions, this paper analyzes the characteristics of power supply starting process and load loop. The start-up process model of thyristor intermediate frequency power supply is established, and the optimization method of startup control parameters is proposed. In the research of the subject, the following work is accomplished: based on the analysis of the start-up process of the thyristor intermediate frequency power supply. This paper points out the reason why the parallel resonant power supply is difficult to start, and puts forward several measures to enhance the starting ability. The formula of equivalent parameters of inductor is deduced by analytic method. At the same time, the characteristics of equivalent load loop are analyzed, and the mathematical model of thyristor intermediate frequency power supply start-up process is established. In MATLAB/Simulink environment. The step response experiments of the open loop and closed loop systems are carried out to verify the correctness of the established mathematical model, which is based on the mathematical model of intermediate frequency power supply. The selection conditions of power supply startup control parameters are derived to obtain better startup performance. For different load start-up conditions, the selection strategy of rectifier trigger angle is presented. Furthermore, the range of rectifier trigger angle under different load attenuation factors is deduced, and finally, the steps of power start control are given. The simulation platform based on MATLAB/Simulink is presented. The start-up simulation model of intermediate frequency power supply with initial energy is established. Under the optimal control parameters and the different attenuation factors, the starting simulation experiments are done respectively under the condition of rectifying angle selection. The simulation results show that the mathematical model of if power supply and the optimization strategy of startup control parameters are reasonable. The mathematical model of the power supply system is more powerful than the load series-parallel startup and IGBT auxiliary bridge starting method. The mathematical model of the power supply system is used to study the follow-up problems of if power supply, such as power supply control. The improvement of power quality has certain reference value.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號(hào)】：TN34

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本文編號(hào)：1371007