【正文】 器分閘過程中實(shí)現(xiàn)分流，這樣便可以使交流接觸器實(shí)現(xiàn)無弧分閘操作 ,大大提高了交流接觸器的電壽命。 關(guān)鍵詞 ： 交流接觸器；智能激磁；無觸點(diǎn) 控制技術(shù) ； 智能保護(hù) 20xx 畢業(yè)設(shè)計(jì)論文 20xx 畢業(yè)設(shè)計(jì)論文 Abstract AC contactor played an irreplaceable role in the field of lowvoltage distribution and automation control. So consistency of performance of the AC contactor has great economic significance. But further development has so far been constrained by its electrical life which below the mechanical life’s level. The direct effect on electrical life is electric arc that has produced in switching process. Especially under the use of categories of AC4, the arc generating by switching process bee the key restriction of the electrical life of the AC contactor. In view of the above problems, this paper put forward a research plan about intelligent Low voltage Ac contactor without arc. As to the problems in the closing and breaking process, we make the intelligent improvement to solve them. The improvement includes two aspects. one aspect is the improvement of electromagic system. this paper designs the corresponding experimental circuit used to determine the specific field parameters which mainly about the DC excitation voltage and DC small voltage. And the design of the intelligent excitation operation of the actuator thereby ensures the stability of the excitation process. The other aspect is intelligent transformation according to the contact system. As to this, the theories mainly divided into zero current breaking and contactless breaking, this paper adopts the contactless breaking concept. The specific approach is in each phase of contact ends connect in parallel with a Bidirectional Triode Thyristor, and supporting the corresponding design of drive circuit and trigger circuit. This makes Bidirectional Triode Thyristor realize shunt in AC contactor onoff process, namely Bidirectional Triode Thyristor bears the main circuit current signal before the onoff process. So it can make AC contactor to achieve arcless closing operation, The greatly improves the electrical life of the contactor. In addition to AC contactor switch process, this paper also focus on other aspects of intelligent transform of AC contactor, mainly provides overvoltage, under voltage, overload, leakage protection function. As to this intelligent improvement, it will make the AC contactor more intelligent. Keywords： AC contactor； DC magizing ； noncontact control technique；intelligent protection (Supported by Huludao Science and Technology Bureau) 20xx 畢業(yè)設(shè)計(jì)論文 20xx 畢業(yè)設(shè)計(jì)論文 目 錄 摘 要 ..................................................................................................... I Abstract.................................................................................................... III 1 緒論 .....................................................................................................1 課題的研究目的和意義 ................................................................ 1 國(guó)內(nèi)外研究概況和發(fā)展趨勢(shì) ......................................................... 1 交流接觸器合閘控制技術(shù)發(fā)展?fàn)顩r ...........................................2 交流接觸器分閘控制技術(shù)發(fā)展?fàn)顩r ...........................................3 節(jié)能保持技術(shù)發(fā)展?fàn)顩r ............................................................4 課題的研究的理論依據(jù)與實(shí)踐方案 .............................................. 5 論文章節(jié)安排 .............................................................................. 5 2 智能交流接觸器總體設(shè)計(jì)方案 ...............................................................7 引言 ............................................................................................ 7 研究對(duì)象簡(jiǎn)介 .............................................................................. 8 智能交流接觸器控制原理分析 ...................................................... 9 智能交流接觸器實(shí) 驗(yàn)樣機(jī) .......................................................... 10 本章小結(jié) ................................................................................... 11 3 智能交流接觸器合閘過程方案研究 ...................................................... 12 交流接觸器合閘過程觸頭彈跳問題的分 析 .................................. 12 脈動(dòng)直流激磁方案分析 .............................................................. 13 合閘相角對(duì)吸合過程的影響 ................................................... 14 激磁電壓對(duì)吸合過程的 影響 ................................................... 15 不同激磁方式對(duì)吸合過程的影響 ............................................ 15 脈動(dòng)直流激磁方案存在的相關(guān)問題 ......................................... 16 多段 脈沖穩(wěn)壓直流激磁方案 分析 ................................................ 17 多段脈沖穩(wěn)壓直流激磁方案原理分析 ..................................... 17 多段脈沖穩(wěn)壓直流激磁系統(tǒng)參數(shù)分析 ..................................... 18 激磁電源設(shè)計(jì) ............................................................................ 21 20xx 畢業(yè)設(shè)計(jì)論文 20xx 畢業(yè)設(shè)計(jì)論文 穩(wěn)壓直流激磁電源的設(shè)計(jì) ...................................................... 21 穩(wěn)壓直流保持電源設(shè)計(jì) .......................................................... 21 智能激磁硬件部分設(shè)計(jì) .............................................................. 22 智能激磁軟件部分設(shè)計(jì) .............................................................. 23 實(shí)驗(yàn)測(cè)試及結(jié)果分析 ................................................................. 23 激 磁電源性能測(cè)試 ................................................................. 23 實(shí)驗(yàn)樣機(jī)合閘測(cè)試 ................................................................. 24 本章小結(jié) ................................................................................... 26 4 智能交流接觸器分閘過程方案研究 ...................................................... 27 交流接觸器觸頭系統(tǒng)電弧能量分析 ............................................ 27 關(guān)于零電流分?jǐn)嗫刂萍夹g(shù) .......................................................... 29 無觸點(diǎn)分?jǐn)嗫刂萍夹g(shù)分析 .......................................................... 32 分閘過程電壓、電流理論分析 ................................................ 33 雙向可控硅控制方案 ............................................................. 36 無觸點(diǎn)分?jǐn)嗫刂栖浖糠衷O(shè)計(jì) ...................................