【正文】 本科畢業(yè)論文（設(shè)計） 中頻感應(yīng)加熱電源的設(shè)計 （整流電路控制電路的設(shè)計） 學(xué)生姓名： 所在院（系）： 機(jī)電學(xué)院 所學(xué)專業(yè)： 機(jī)械設(shè)計制造及其自動化 導(dǎo)師姓名： 完成時間： 1 摘 要 感應(yīng)加熱電源具有 加熱效率高，速度快，可控性好，易于實現(xiàn)高溫和局部加熱，易于實現(xiàn)機(jī)械化和自動化等優(yōu)點 ，目前已在金屬熔煉、工件透熱、淬火、焊接、鑄造、彎管、表面熱處理等行業(yè)得到了廣泛的應(yīng)用。 本設(shè)計研究了中頻感應(yīng)加熱及其相關(guān)技術(shù)的發(fā)展、現(xiàn)狀和趨勢，并在較全面的論述基礎(chǔ)上，對 電路進(jìn)行了設(shè)計。本文設(shè)計的電源電路可用于大型機(jī)械熱加工設(shè)備的感應(yīng)加熱電源。整流電路采用三相橋式全控整流電路，其電路結(jié)構(gòu)簡單，使電源易于推廣；控制策略選用雙閉環(huán)反饋控制系統(tǒng)，改善了信號遲滯的缺點，為以后研制大功率、超音頻的感應(yīng)加熱電源打下了基礎(chǔ)。 關(guān)鍵詞： 可控硅中頻電源；感應(yīng)加熱；逆變；保護(hù)電路 2 Design of Induction heating power of medium frequency Abstract Induction heating power is equipped with lots of advantages such as high heating efficiency, fast speed ,good controllability, which is prone to make heating of high and partial temperature ， and realize mechanization and automation. At present metal melting, work piece heat peration, quenching, welding, casting, elbow piece, surface heating processing has been widely applied. Induction heating of medium frequency and development, current situation, and tendency related technology has been studied， and have made quite prehensive and in the profound elaboration foundation, this article has carried on the design to main circuit and the inversion control of the rectifier intermediate frequency induction heating power. This design is used for big facility of mechanical heating processing. Structure of rectification circuit is easy, which makes power popularized easily. Threephase bridge rectification circuit is used in Rectification circuit. Rectification circuit uses feedback control of two closed loop, improving the disadvantages. The foundation for inventing induction heating power of big power and super audio is made. Key words： Controllable silicon medium power Induction heating Inverter Protect circuit 3 目 錄 .............................................................. 4 感應(yīng)加熱電源的特點和應(yīng)用 .................................... 4 感應(yīng)加熱電源的發(fā)展階段 ...................................... 4 感應(yīng)加熱電源發(fā)展的主要因素 .................................. 5 感應(yīng)加熱電源的發(fā)展趨勢 ...................................... 5 ...................................................... 6 基本工作原理 ................................................ 6 基本結(jié)構(gòu) .................................................... 7 ...................................................... 8 整流電路的分類 .............................................. 8 整流電路的選擇 .............................................. 8 三相橋式全控整流電路 ........................................ 9 整流電路的參數(shù)設(shè)計 .......................................... 11 ..................................................... 12 控制電路系統(tǒng)的概述 ......................................... 12 控制電路的結(jié)構(gòu)與原理 ....................................... 12 控制電路的作用 ............................................. 14 控制策略 ................................................... 14 控制觸發(fā)回路頻率跟蹤調(diào)節(jié) ................................... 18 觸發(fā)要求 .............................................. 18 頻率跟蹤電路 .......................................... 18 過流和過壓的保護(hù)電路 ....................................... 19 論 ............................................................ 20 致 謝 .............................................................. 21 參考文獻(xiàn) ........................................................... 22 4 感應(yīng)加 熱電源的特點和應(yīng)用 感應(yīng)加熱是根據(jù)電磁感應(yīng)原理，利用工件中渦流產(chǎn)生的熱量對工件進(jìn)行加熱的。由于感應(yīng)加熱效率高，速度快，可控性好，易于實現(xiàn)高溫和局部加熱，易于實現(xiàn)機(jī)械化和自動化等優(yōu)點，已在熔煉，鑄造，彎管，熱鍛，焊接和表面熱處理等行業(yè)得到廣泛的應(yīng)用。在國外，感應(yīng)加熱技術(shù)已日趨成熟。在鑄造方面，正在迅速發(fā)展雙聯(lián)熔煉工藝，即利用中頻爐保溫改性，進(jìn)行球墨鐵或合金鋼的精密澆鑄；在鍛造方面，利用感應(yīng)加熱實現(xiàn)快速透熱熱鍛，其材料利用率可達(dá) 85%，鍛件表面光潔度可小于 50μ m；在焊接，淬火方面，國外一方面致力