導語：起動控制實訓系統設計研(yan)究一文來(lai)源于網友上傳(chuan)，不代表本站觀點，若(ruo)需要原(yuan)創文章可咨詢客(ke)服老(lao)師，歡迎參考。

摘要：以11kW三相異步電動機為例，介紹了一種大功率電動機星三角減壓起動控制實訓系(xi)統的設計原則和內(nei)容，分析了該實訓系(xi)統的可靠(kao)性及常見故障的解決措施。

關鍵詞：大功率電機；星三角減壓起動；實訓系統；可靠性分析

高職(zhi)“電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)氣控(kong)制(zhi)技(ji)術”課程主要培(pei)養學(xue)生(sheng)的(de)(de)繼(ji)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)-接觸器控(kong)制(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)裝(zhuang)調與維(wei)(wei)修，低壓(ya)(ya)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)器的(de)(de)識別(bie)、選型(xing)、安裝(zhuang)能力，電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)氣控(kong)制(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)接線、調試能力和(he)線路(lu)故(gu)障(zhang)檢修能力。課程中(zhong)(zhong)，三(san)相(xiang)異步(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)星三(san)角減壓(ya)(ya)起(qi)(qi)動(dong)控(kong)制(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)的(de)(de)裝(zhuang)調是必須要掌握的(de)(de)典型(xing)工作任務(wu)，也是維(wei)(wei)修電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)工技(ji)能認(ren)定(ding)的(de)(de)重要考核項目。在高職(zhi)院校教(jiao)學(xue)過程中(zhong)(zhong)一般采用功率(lv)小于0.75kW的(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)機(ji)進(jin)行(xing)(xing)模(mo)擬運行(xing)(xing)，而星三(san)角減壓(ya)(ya)起(qi)(qi)動(dong)控(kong)制(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)主要用于功率(lv)大于10kW以上電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)的(de)(de)減壓(ya)(ya)起(qi)(qi)動(dong)。小功率(lv)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)在教(jiao)學(xue)應用中(zhong)(zhong)雖然(ran)比較安全，但不(bu)能直觀地演示減壓(ya)(ya)起(qi)(qi)動(dong)的(de)(de)效果(guo)和(he)星三(san)角轉換的(de)(de)過程。本文以11kW三(san)相(xiang)籠型(xing)異步(bu)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)星三(san)角降壓(ya)(ya)起(qi)(qi)動(dong)控(kong)制(zhi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)路(lu)裝(zhuang)調為例，介紹了(le)基于企業實際工作任務(wu)的(de)(de)一種大功率(lv)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)動(dong)機(ji)星三(san)角降壓(ya)(ya)起(qi)(qi)動(dong)控(kong)制(zhi)實訓系統(tong)的(de)(de)設(she)計，并對該系統(tong)的(de)(de)可靠(kao)性(xing)及常見故(gu)障(zhang)的(de)(de)解決(jue)措施進(jin)行(xing)(xing)了(le)分析。

1設計原則和內容

1.1結合(he)企(qi)業(ye)實(shi)際(ji)工(gong)作任務實(shi)施過程(cheng)設計實(shi)訓(xun)系統

高職教育教學的目標是培養符合企業實際需求，能夠滿足用人單位工作崗位素養和技能要求的高素質技術技能型人才。專業課程的教學要選擇企業典型工作任務，結合企業工作任務實施的過程開展“工學結合”的教學，既要培養學生的專業技能，還要讓學生掌握企業工作任務實施的工作過程，培養出受企業歡迎的人才。大功率電動機星三角降壓起動控制實訓系統的設計以11kW三相籠型異步電動機星三角降壓起動控制電路裝調為例，按照企業電氣控制系統設計的(de)內(nei)容(rong)和(he)(he)流程，結(jie)合高職院校教育教學(xue)(xue)要(yao)(yao)(yao)(yao)求(qiu)(qiu)的(de)原則進行設計(ji)(ji)。該實(shi)(shi)訓系(xi)統(tong)的(de)設計(ji)(ji)內(nei)容(rong)包(bao)括(kuo)(kuo)與企(qi)業(ye)控(kong)制(zhi)(zhi)(zhi)系(xi)統(tong)設計(ji)(ji)任(ren)務(wu)一致的(de)設計(ji)(ji)任(ren)務(wu)書（設計(ji)(ji)文(wen)件(jian)）和(he)(he)工(gong)(gong)(gong)(gong)(gong)藝(yi)(yi)(yi)(yi)文(wen)件(jian)、符(fu)合企(qi)業(ye)工(gong)(gong)(gong)(gong)(gong)藝(yi)(yi)(yi)(yi)規范(fan)和(he)(he)標準(zhun)要(yao)(yao)(yao)(yao)求(qiu)(qiu)的(de)用于實(shi)(shi)訓教學(xue)(xue)的(de)電(dian)(dian)(dian)氣(qi)(qi)控(kong)制(zhi)(zhi)(zhi)柜（板）、組(zu)(zu)合的(de)星(xing)三(san)角(jiao)啟(qi)動(dong)器、可靠性實(shi)(shi)驗驗證報告。設計(ji)(ji)文(wen)件(jian)的(de)內(nei)容(rong)包(bao)括(kuo)(kuo)相應的(de)標準(zhun)和(he)(he)規范(fan)，控(kong)制(zhi)(zhi)(zhi)系(xi)統(tong)要(yao)(yao)(yao)(yao)求(qiu)(qiu)，控(kong)制(zhi)(zhi)(zhi)系(xi)統(tong)電(dian)(dian)(dian)氣(qi)(qi)原理(li)圖(tu)(tu)(tu)，控(kong)制(zhi)(zhi)(zhi)系(xi)統(tong)工(gong)(gong)(gong)(gong)(gong)作原理(li)，控(kong)制(zhi)(zhi)(zhi)容(rong)量計(ji)(ji)算和(he)(he)元器件(jian)選型、零(ling)部件(jian)材料明(ming)細(xi)表(biao)，關鍵件(jian)明(ming)細(xi)表(biao)、圖(tu)(tu)(tu)紙(zhi)（包(bao)括(kuo)(kuo)電(dian)(dian)(dian)氣(qi)(qi)控(kong)制(zhi)(zhi)(zhi)系(xi)統(tong)電(dian)(dian)(dian)氣(qi)(qi)原理(li)圖(tu)(tu)(tu)、安裝(zhuang)(zhuang)布置(zhi)圖(tu)(tu)(tu)、接(jie)線(xian)圖(tu)(tu)(tu)和(he)(he)組(zu)(zu)合的(de)星(xing)三(san)角(jiao)啟(qi)動(dong)器的(de)零(ling)件(jian)圖(tu)(tu)(tu)、部件(jian)圖(tu)(tu)(tu)、裝(zhuang)(zhuang)配(pei)圖(tu)(tu)(tu)），質量檢驗要(yao)(yao)(yao)(yao)求(qiu)(qiu)，合格標準(zhun)等。工(gong)(gong)(gong)(gong)(gong)藝(yi)(yi)(yi)(yi)文(wen)件(jian)的(de)內(nei)容(rong)包(bao)括(kuo)(kuo)工(gong)(gong)(gong)(gong)(gong)藝(yi)(yi)(yi)(yi)路線(xian)、工(gong)(gong)(gong)(gong)(gong)藝(yi)(yi)(yi)(yi)要(yao)(yao)(yao)(yao)求(qiu)(qiu)、安裝(zhuang)(zhuang)調試工(gong)(gong)(gong)(gong)(gong)藝(yi)(yi)(yi)(yi)圖(tu)(tu)(tu)、工(gong)(gong)(gong)(gong)(gong)藝(yi)(yi)(yi)(yi)卡(ka)片、零(ling)部件(jian)材料導線(xian)明(ming)細(xi)表(biao)、質量檢查工(gong)(gong)(gong)(gong)(gong)藝(yi)(yi)(yi)(yi)流程等。電(dian)(dian)(dian)氣(qi)(qi)控(kong)制(zhi)(zhi)(zhi)柜（板）為完成安裝(zhuang)(zhuang)和(he)(he)調試的(de)電(dian)(dian)(dian)氣(qi)(qi)控(kong)制(zhi)(zhi)(zhi)系(xi)統(tong)實(shi)(shi)物，該實(shi)(shi)物完全按照企(qi)業(ye)控(kong)制(zhi)(zhi)(zhi)柜安裝(zhuang)(zhuang)的(de)電(dian)(dian)(dian)氣(qi)(qi)規范(fan)和(he)(he)電(dian)(dian)(dian)氣(qi)(qi)標準(zhun)要(yao)(yao)(yao)(yao)求(qiu)(qiu)安裝(zhuang)(zhuang)，既滿足控(kong)制(zhi)(zhi)(zhi)要(yao)(yao)(yao)(yao)求(qiu)(qiu)，又(you)能(neng)作為實(shi)(shi)訓教學(xue)(xue)的(de)標準(zhun)模板。組(zu)(zu)合的(de)星(xing)三(san)角(jiao)啟(qi)動(dong)器實(shi)(shi)物主要(yao)(yao)(yao)(yao)是結(jie)合市場和(he)(he)企(qi)業(ye)實(shi)(shi)際需求(qiu)(qiu)，自主組(zu)(zu)裝(zhuang)(zhuang)完成的(de)組(zu)(zu)合星(xing)三(san)角(jiao)啟(qi)動(dong)器，用于向學(xue)(xue)生(sheng)展示新(xin)產(chan)品(pin)(pin)、新(xin)工(gong)(gong)(gong)(gong)(gong)藝(yi)(yi)(yi)(yi)，并學(xue)(xue)習和(he)(he)掌握該產(chan)品(pin)(pin)的(de)使用方法。

1.2實訓系統突(tu)出教學功能(neng)，提高教學質量

大功(gong)(gong)率(lv)電(dian)動(dong)機(ji)星三角起(qi)動(dong)控制實(shi)(shi)訓(xun)(xun)(xun)(xun)系(xi)(xi)(xi)統(tong)(tong)的(de)(de)(de)設計在(zai)(zai)基于(yu)企業(ye)實(shi)(shi)際工(gong)(gong)(gong)作(zuo)(zuo)(zuo)(zuo)任(ren)(ren)(ren)(ren)務實(shi)(shi)施的(de)(de)(de)基礎上，結合(he)教(jiao)學(xue)(xue)(xue)要求(qiu)(qiu)和(he)(he)(he)(he)(he)教(jiao)學(xue)(xue)(xue)規(gui)律，突出教(jiao)學(xue)(xue)(xue)功(gong)(gong)能，滿足教(jiao)學(xue)(xue)(xue)實(shi)(shi)訓(xun)(xun)(xun)(xun)的(de)(de)(de)演(yan)示功(gong)(gong)能，并作(zuo)(zuo)(zuo)(zuo)為(wei)(wei)(wei)標(biao)(biao)準(zhun)模(mo)版(ban)和(he)(he)(he)(he)(he)評(ping)價標(biao)(biao)準(zhun)。通(tong)過(guo)(guo)(guo)學(xue)(xue)(xue)習(xi)該(gai)(gai)(gai)實(shi)(shi)訓(xun)(xun)(xun)(xun)系(xi)(xi)(xi)統(tong)(tong)的(de)(de)(de)設計文(wen)(wen)件(jian)，讓(rang)學(xue)(xue)(xue)生(sheng)熟悉和(he)(he)(he)(he)(he)掌(zhang)(zhang)握(wo)(wo)企業(ye)實(shi)(shi)際工(gong)(gong)(gong)作(zuo)(zuo)(zuo)(zuo)任(ren)(ren)(ren)(ren)務實(shi)(shi)施的(de)(de)(de)內容和(he)(he)(he)(he)(he)要求(qiu)(qiu)，激發學(xue)(xue)(xue)習(xi)的(de)(de)(de)積(ji)極性。通(tong)過(guo)(guo)(guo)使(shi)(shi)用(yong)(yong)該(gai)(gai)(gai)實(shi)(shi)訓(xun)(xun)(xun)(xun)系(xi)(xi)(xi)統(tong)(tong)的(de)(de)(de)工(gong)(gong)(gong)藝(yi)(yi)(yi)文(wen)(wen)件(jian)，讓(rang)學(xue)(xue)(xue)生(sheng)在(zai)(zai)實(shi)(shi)訓(xun)(xun)(xun)(xun)過(guo)(guo)(guo)程(cheng)中(zhong)(zhong)既能掌(zhang)(zhang)握(wo)(wo)企業(ye)實(shi)(shi)際工(gong)(gong)(gong)作(zuo)(zuo)(zuo)(zuo)任(ren)(ren)(ren)(ren)務的(de)(de)(de)工(gong)(gong)(gong)藝(yi)(yi)(yi)流(liu)程(cheng)和(he)(he)(he)(he)(he)工(gong)(gong)(gong)藝(yi)(yi)(yi)要求(qiu)(qiu)，又有(you)(you)助(zhu)于(yu)學(xue)(xue)(xue)生(sheng)準(zhun)確把握(wo)(wo)和(he)(he)(he)(he)(he)理(li)(li)(li)解(jie)工(gong)(gong)(gong)藝(yi)(yi)(yi)規(gui)范(fan)(fan)和(he)(he)(he)(he)(he)工(gong)(gong)(gong)藝(yi)(yi)(yi)要求(qiu)(qiu)。在(zai)(zai)工(gong)(gong)(gong)藝(yi)(yi)(yi)文(wen)(wen)件(jian)的(de)(de)(de)設計上，采用(yong)(yong)實(shi)(shi)物圖和(he)(he)(he)(he)(he)文(wen)(wen)字注釋結合(he)的(de)(de)(de)形(xing)式(shi)，用(yong)(yong)圖文(wen)(wen)形(xing)象地描述(shu)工(gong)(gong)(gong)藝(yi)(yi)(yi)過(guo)(guo)(guo)程(cheng)和(he)(he)(he)(he)(he)工(gong)(gong)(gong)藝(yi)(yi)(yi)流(liu)程(cheng)，這種方式(shi)重點解(jie)決在(zai)(zai)以往(wang)學(xue)(xue)(xue)習(xi)過(guo)(guo)(guo)程(cheng)中(zhong)(zhong)存在(zai)(zai)的(de)(de)(de)原理(li)(li)(li)圖不(bu)易理(li)(li)(li)解(jie)、安裝(zhuang)接(jie)線(xian)時不(bu)會按(an)(an)(an)圖接(jie)線(xian)、接(jie)線(xian)不(bu)規(gui)范(fan)(fan)、不(bu)能按(an)(an)(an)照工(gong)(gong)(gong)藝(yi)(yi)(yi)要求(qiu)(qiu)和(he)(he)(he)(he)(he)工(gong)(gong)(gong)藝(yi)(yi)(yi)規(gui)范(fan)(fan)及標(biao)(biao)準(zhun)調試檢(jian)修等(deng)問(wen)題。學(xue)(xue)(xue)生(sheng)在(zai)(zai)安裝(zhuang)接(jie)線(xian)過(guo)(guo)(guo)程(cheng)中(zhong)(zhong)，對照工(gong)(gong)(gong)藝(yi)(yi)(yi)文(wen)(wen)件(jian)與安裝(zhuang)接(jie)線(xian)規(gui)范(fan)(fan)要求(qiu)(qiu)，在(zai)(zai)學(xue)(xue)(xue)習(xi)電(dian)氣安裝(zhuang)接(jie)線(xian)之初，將該(gai)(gai)(gai)實(shi)(shi)訓(xun)(xun)(xun)(xun)系(xi)(xi)(xi)統(tong)(tong)作(zuo)(zuo)(zuo)(zuo)為(wei)(wei)(wei)模(mo)板(ban)。學(xue)(xue)(xue)生(sheng)通(tong)過(guo)(guo)(guo)模(mo)仿(fang)并結合(he)教(jiao)師的(de)(de)(de)講(jiang)解(jie)進行操(cao)(cao)作(zuo)(zuo)(zuo)(zuo)，即按(an)(an)(an)照標(biao)(biao)準(zhun)的(de)(de)(de)操(cao)(cao)作(zuo)(zuo)(zuo)(zuo)規(gui)范(fan)(fan)進行技能訓(xun)(xun)(xun)(xun)練(lian)，又在(zai)(zai)實(shi)(shi)際操(cao)(cao)作(zuo)(zuo)(zuo)(zuo)中(zhong)(zhong)理(li)(li)(li)解(jie)標(biao)(biao)準(zhun)和(he)(he)(he)(he)(he)規(gui)范(fan)(fan)的(de)(de)(de)理(li)(li)(li)論要求(qiu)(qiu)，通(tong)過(guo)(guo)(guo)理(li)(li)(li)論指(zhi)導實(shi)(shi)踐，在(zai)(zai)實(shi)(shi)踐過(guo)(guo)(guo)程(cheng)中(zhong)(zhong)理(li)(li)(li)解(jie)掌(zhang)(zhang)握(wo)(wo)理(li)(li)(li)論知(zhi)識，該(gai)(gai)(gai)階段(duan)處于(yu)模(mo)仿(fang)操(cao)(cao)作(zuo)(zuo)(zuo)(zuo)階段(duan)。經(jing)過(guo)(guo)(guo)多個任(ren)(ren)(ren)(ren)務的(de)(de)(de)實(shi)(shi)施，學(xue)(xue)(xue)生(sheng)逐漸掌(zhang)(zhang)握(wo)(wo)和(he)(he)(he)(he)(he)理(li)(li)(li)解(jie)了操(cao)(cao)作(zuo)(zuo)(zuo)(zuo)規(gui)范(fan)(fan)及要求(qiu)(qiu)，在(zai)(zai)后續(xu)的(de)(de)(de)任(ren)(ren)(ren)(ren)務實(shi)(shi)施中(zhong)(zhong)開(kai)展(zhan)(zhan)工(gong)(gong)(gong)藝(yi)(yi)(yi)路線(xian)和(he)(he)(he)(he)(he)工(gong)(gong)(gong)藝(yi)(yi)(yi)流(liu)程(cheng)的(de)(de)(de)自主設計，培(pei)養學(xue)(xue)(xue)生(sheng)工(gong)(gong)(gong)藝(yi)(yi)(yi)設計的(de)(de)(de)能力，該(gai)(gai)(gai)階段(duan)為(wei)(wei)(wei)知(zhi)識的(de)(de)(de)運(yun)用(yong)(yong)階段(duan)和(he)(he)(he)(he)(he)能力的(de)(de)(de)提升階段(duan)。該(gai)(gai)(gai)實(shi)(shi)訓(xun)(xun)(xun)(xun)系(xi)(xi)(xi)統(tong)(tong)的(de)(de)(de)演(yan)示功(gong)(gong)能能夠(gou)使(shi)(shi)學(xue)(xue)(xue)生(sheng)直觀(guan)地觀(guan)察大功(gong)(gong)率(lv)電(dian)動(dong)機(ji)星三角減壓起(qi)動(dong)的(de)(de)(de)過(guo)(guo)(guo)程(cheng)，理(li)(li)(li)解(jie)工(gong)(gong)(gong)作(zuo)(zuo)(zuo)(zuo)原理(li)(li)(li)，掌(zhang)(zhang)握(wo)(wo)工(gong)(gong)(gong)作(zuo)(zuo)(zuo)(zuo)過(guo)(guo)(guo)程(cheng)。該(gai)(gai)(gai)實(shi)(shi)訓(xun)(xun)(xun)(xun)系(xi)(xi)(xi)統(tong)(tong)作(zuo)(zuo)(zuo)(zuo)為(wei)(wei)(wei)對學(xue)(xue)(xue)生(sheng)開(kai)展(zhan)(zhan)考(kao)核評(ping)價的(de)(de)(de)標(biao)(biao)準(zhun)和(he)(he)(he)(he)(he)依據，更有(you)(you)說服力，能更進一(yi)步提高(gao)學(xue)(xue)(xue)生(sheng)學(xue)(xue)(xue)習(xi)的(de)(de)(de)積(ji)極性和(he)(he)(he)(he)(he)有(you)(you)效(xiao)性。在(zai)(zai)實(shi)(shi)踐教(jiao)學(xue)(xue)(xue)中(zhong)(zhong)采用(yong)(yong)該(gai)(gai)(gai)實(shi)(shi)訓(xun)(xun)(xun)(xun)系(xi)(xi)(xi)統(tong)(tong)有(you)(you)效(xiao)提升了教(jiao)學(xue)(xue)(xue)質量，取得了較好的(de)(de)(de)效(xiao)果。

2實訓系統的可靠性分析

2.1星三角減(jian)壓起(qi)動控制(zhi)電路的工作(zuo)過(guo)程

常(chang)用的星三角(jiao)減(jian)壓(ya)起動控制電(dian)(dian)路如圖1所示。電(dian)(dian)路的工作過(guo)程為合上刀(dao)開(kai)關QS，按(an)(an)下起動按(an)(an)鈕SB2，KM△、KMY接(jie)(jie)觸(chu)(chu)(chu)器(qi)(qi)和KT時(shi)(shi)間繼(ji)電(dian)(dian)器(qi)(qi)線(xian)圈(quan)(quan)得電(dian)(dian)，KM△和KMY接(jie)(jie)觸(chu)(chu)(chu)器(qi)(qi)主觸(chu)(chu)(chu)點(dian)(dian)接(jie)(jie)通，電(dian)(dian)動機(ji)定(ding)子繞組星型連接(jie)(jie)，電(dian)(dian)動機(ji)減(jian)壓(ya)起動。KT延時(shi)(shi)斷開(kai)常(chang)閉(bi)觸(chu)(chu)(chu)點(dian)(dian)按(an)(an)設定(ding)的時(shi)(shi)間延時(shi)(shi)后(hou)斷開(kai)，KMY接(jie)(jie)觸(chu)(chu)(chu)器(qi)(qi)線(xian)圈(quan)(quan)失電(dian)(dian)，KMY接(jie)(jie)觸(chu)(chu)(chu)器(qi)(qi)主觸(chu)(chu)(chu)點(dian)(dian)斷開(kai)，之后(hou)KT延時(shi)(shi)接(jie)(jie)通常(chang)開(kai)觸(chu)(chu)(chu)點(dian)(dian)按(an)(an)設定(ding)的時(shi)(shi)間延時(shi)(shi)后(hou)閉(bi)合，KM△接(jie)(jie)觸(chu)(chu)(chu)器(qi)(qi)線(xian)圈(quan)(quan)得電(dian)(dian)，KM△接(jie)(jie)觸(chu)(chu)(chu)器(qi)(qi)主觸(chu)(chu)(chu)點(dian)(dian)接(jie)(jie)通。此(ci)時(shi)(shi)，電(dian)(dian)動機(ji)定(ding)子繞組三角(jiao)形連接(jie)(jie)，電(dian)(dian)動機(ji)在額定(ding)電(dian)(dian)壓(ya)下運行。

2.2星三角切換可(ke)靠(kao)性分(fen)析及影響因素

星(xing)(xing)三(san)角(jiao)(jiao)減壓起動(dong)控(kong)制(zhi)(zhi)可(ke)(ke)靠性的(de)(de)(de)(de)(de)重要(yao)指標是(shi)星(xing)(xing)形(xing)(xing)接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)法與(yu)三(san)角(jiao)(jiao)形(xing)(xing)接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)法切換時(shi)(shi)(shi)(shi)主(zhu)電路(lu)(lu)不(bu)發生(sheng)短(duan)(duan)路(lu)(lu)。11kW三(san)相異步(bu)電動(dong)機(ji)星(xing)(xing)三(san)角(jiao)(jiao)減壓起動(dong)采用(yong)(yong)(yong)CJ20-12接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)控(kong)制(zhi)(zhi)主(zhu)電路(lu)(lu)的(de)(de)(de)(de)(de)切換，分(fen)析計算切換時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)。由圖(tu)(tu)1所(suo)(suo)示(shi)(shi)(shi)的(de)(de)(de)(de)(de)星(xing)(xing)三(san)角(jiao)(jiao)減壓起動(dong)控(kong)制(zhi)(zhi)電路(lu)(lu)原理圖(tu)(tu)可(ke)(ke)知(zhi)，KMY星(xing)(xing)型(xing)接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)線(xian)(xian)(xian)圈(quan)(quan)失(shi)(shi)(shi)電時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)加(jia)主(zhu)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭走完(wan)超行程后(hou)斷(duan)開的(de)(de)(de)(de)(de)時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)即(ji)(ji)為KMY接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)釋放時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)，用(yong)(yong)(yong)t1表(biao)示(shi)(shi)(shi)。KMY接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)線(xian)(xian)(xian)圈(quan)(quan)失(shi)(shi)(shi)電時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)加(jia)常(chang)(chang)閉(bi)輔(fu)助觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭走完(wan)開距(ju)后(hou)接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)通(tong)(tong)的(de)(de)(de)(de)(de)時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)用(yong)(yong)(yong)t2表(biao)示(shi)(shi)(shi)，根據表(biao)1中(zhong)接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭參(can)(can)數(shu)可(ke)(ke)知(zhi)，在(zai)正常(chang)(chang)狀(zhuang)態(tai)下KMY星(xing)(xing)型(xing)接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)線(xian)(xian)(xian)圈(quan)(quan)失(shi)(shi)(shi)電后(hou)主(zhu)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭先斷(duan)開，輔(fu)助常(chang)(chang)閉(bi)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭后(hou)接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)通(tong)(tong)，即(ji)(ji)t2＞t1。當KMY星(xing)(xing)型(xing)接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)輔(fu)助常(chang)(chang)閉(bi)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭經t2后(hou)接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)通(tong)(tong)，KM△三(san)角(jiao)(jiao)形(xing)(xing)接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)線(xian)(xian)(xian)圈(quan)(quan)得電時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)加(jia)主(zhu)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)通(tong)(tong)時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)用(yong)(yong)(yong)t3表(biao)示(shi)(shi)(shi)，則KMY與(yu)KM△之間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)切換的(de)(de)(de)(de)(de)時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)為從KMY接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)線(xian)(xian)(xian)圈(quan)(quan)失(shi)(shi)(shi)電開始計算到KMY接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)輔(fu)助常(chang)(chang)閉(bi)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)點閉(bi)合(he)，KM△接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)線(xian)(xian)(xian)圈(quan)(quan)得電，主(zhu)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)點接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)通(tong)(tong)的(de)(de)(de)(de)(de)時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)總和(he)(he)用(yong)(yong)(yong)t4表(biao)示(shi)(shi)(shi)，即(ji)(ji)t4=t2+t3，如圖(tu)(tu)2所(suo)(suo)示(shi)(shi)(shi)，由此可(ke)(ke)見(jian)t4＞t1。通(tong)(tong)過上述分(fen)析計算可(ke)(ke)知(zhi)在(zai)接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭彈(dan)(dan)(dan)簧(huang)(huang)(huang)(huang)力(li)(li)、線(xian)(xian)(xian)圈(quan)(quan)匝數(shu)、線(xian)(xian)(xian)圈(quan)(quan)電阻值在(zai)正常(chang)(chang)范圍(wei)(wei)內(nei)時(shi)(shi)(shi)(shi)，KM△和(he)(he)KMY接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)切換不(bu)會發生(sheng)短(duan)(duan)路(lu)(lu)現象(xiang)(xiang)，星(xing)(xing)三(san)角(jiao)(jiao)減壓起動(dong)控(kong)制(zhi)(zhi)電路(lu)(lu)是(shi)可(ke)(ke)以可(ke)(ke)靠運行的(de)(de)(de)(de)(de)。使用(yong)(yong)(yong)數(shu)字示(shi)(shi)(shi)波器(qi)(qi)(qi)(qi)測(ce)(ce)試CJ20-12接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)組成(cheng)的(de)(de)(de)(de)(de)星(xing)(xing)三(san)角(jiao)(jiao)實訓系(xi)統(tong)控(kong)制(zhi)(zhi)線(xian)(xian)(xian)路(lu)(lu)中(zhong)KMY接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)釋放時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)和(he)(he)KM△接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)吸(xi)合(he)時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)。測(ce)(ce)試步(bu)驟為：①接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)通(tong)(tong)電源；②接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)線(xian)(xian)(xian)圈(quan)(quan)通(tong)(tong)電，示(shi)(shi)(shi)波器(qi)(qi)(qi)(qi)產生(sheng)波形(xing)(xing)后(hou)按下STOP鍵；③展開記錄(lu)的(de)(de)(de)(de)(de)波形(xing)(xing)并讀(du)數(shu)；④重復進行多(duo)次(ci)(ci)步(bu)驟②③并讀(du)數(shu)。在(zai)實際控(kong)制(zhi)(zhi)電路(lu)(lu)中(zhong)，由于接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)制(zhi)(zhi)造時(shi)(shi)(shi)(shi)不(bu)同批次(ci)(ci)的(de)(de)(de)(de)(de)產品(pin)(pin)(pin)因(yin)銜鐵(tie)、磁軛(e)、線(xian)(xian)(xian)圈(quan)(quan)等(deng)磁系(xi)統(tong)的(de)(de)(de)(de)(de)關鍵零部件參(can)(can)數(shu)的(de)(de)(de)(de)(de)差異以及觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭彈(dan)(dan)(dan)簧(huang)(huang)(huang)(huang)、反力(li)(li)彈(dan)(dan)(dan)簧(huang)(huang)(huang)(huang)等(deng)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭系(xi)統(tong)關鍵零件尺寸的(de)(de)(de)(de)(de)制(zhi)(zhi)造誤(wu)差，導(dao)致(zhi)吸(xi)合(he)時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)會有小(xiao)幅度波動(dong)。通(tong)(tong)過測(ce)(ce)試，不(bu)同批次(ci)(ci)產品(pin)(pin)(pin)的(de)(de)(de)(de)(de)吸(xi)合(he)和(he)(he)釋放時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)測(ce)(ce)試結果的(de)(de)(de)(de)(de)平均(jun)值為：吸(xi)合(he)時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)20ms，釋放時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)10ms。測(ce)(ce)試接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)線(xian)(xian)(xian)圖(tu)(tu)如圖(tu)(tu)3所(suo)(suo)示(shi)(shi)(shi)。接(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)(jie)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)器(qi)(qi)(qi)(qi)吸(xi)合(he)時(shi)(shi)(shi)(shi)的(de)(de)(de)(de)(de)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭會產生(sheng)振動(dong)發生(sheng)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭彈(dan)(dan)(dan)跳，發生(sheng)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭彈(dan)(dan)(dan)跳的(de)(de)(de)(de)(de)主(zhu)要(yao)原因(yin)是(shi)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭分(fen)斷(duan)電流時(shi)(shi)(shi)(shi)的(de)(de)(de)(de)(de)電動(dong)斥(chi)力(li)(li)及觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭彈(dan)(dan)(dan)簧(huang)(huang)(huang)(huang)反力(li)(li)的(de)(de)(de)(de)(de)配(pei)合(he)異常(chang)(chang)。觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭彈(dan)(dan)(dan)簧(huang)(huang)(huang)(huang)加(jia)工誤(wu)差及公差因(yin)素導(dao)致(zhi)個別觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭彈(dan)(dan)(dan)簧(huang)(huang)(huang)(huang)力(li)(li)偏小(xiao)，導(dao)致(zhi)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭異常(chang)(chang)振動(dong)，觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭吸(xi)合(he)后(hou)有多(duo)次(ci)(ci)短(duan)(duan)時(shi)(shi)(shi)(shi)彈(dan)(dan)(dan)開現象(xiang)(xiang)，會導(dao)致(zhi)產品(pin)(pin)(pin)吸(xi)合(he)時(shi)(shi)(shi)(shi)間(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)(jian)較長。通(tong)(tong)過篩選彈(dan)(dan)(dan)簧(huang)(huang)(huang)(huang)力(li)(li)在(zai)產品(pin)(pin)(pin)設計要(yao)求范圍(wei)(wei)內(nei)的(de)(de)(de)(de)(de)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭彈(dan)(dan)(dan)簧(huang)(huang)(huang)(huang)，嚴(yan)格(ge)控(kong)制(zhi)(zhi)觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭彈(dan)(dan)(dan)簧(huang)(huang)(huang)(huang)力(li)(li)的(de)(de)(de)(de)(de)檢測(ce)(ce)，使觸(chu)(chu)(chu)(chu)(chu)(chu)(chu)頭彈(dan)(dan)(dan)簧(huang)(huang)(huang)(huang)參(can)(can)數(shu)滿(man)足設計要(yao)求，不(bu)再出現彈(dan)(dan)(dan)跳現象(xiang)(xiang)。

3實訓系統運行故障及解決措施

3.1按(an)下起動按(an)鈕(niu)接觸器不(bu)動作(zuo)

首先檢(jian)(jian)查(cha)(cha)(cha)主電(dian)(dian)路(lu)(lu)(lu)，在(zai)斷(duan)路(lu)(lu)(lu)器(qi)(qi)閉合的前提下，用電(dian)(dian)壓(ya)(ya)(ya)表(biao)測(ce)量(liang)(liang)電(dian)(dian)源電(dian)(dian)壓(ya)(ya)(ya)，判定電(dian)(dian)源電(dian)(dian)壓(ya)(ya)(ya)是(shi)否(fou)正常；用電(dian)(dian)壓(ya)(ya)(ya)表(biao)測(ce)量(liang)(liang)相(xiang)間電(dian)(dian)壓(ya)(ya)(ya)，檢(jian)(jian)查(cha)(cha)(cha)主電(dian)(dian)路(lu)(lu)(lu)線路(lu)(lu)(lu)接(jie)線是(shi)否(fou)正確無誤(wu)。再用電(dian)(dian)阻分階測(ce)量(liang)(liang)法檢(jian)(jian)測(ce)控(kong)制電(dian)(dian)路(lu)(lu)(lu)接(jie)線，排除(chu)線路(lu)(lu)(lu)故障。注意(yi)檢(jian)(jian)查(cha)(cha)(cha)熱(re)繼(ji)電(dian)(dian)器(qi)(qi)是(shi)否(fou)有過載后未(wei)復(fu)位，測(ce)量(liang)(liang)熱(re)繼(ji)電(dian)(dian)器(qi)(qi)的常閉觸點在(zai)復(fu)位狀態是(shi)否(fou)通路(lu)(lu)(lu)。判斷(duan)測(ce)量(liang)(liang)接(jie)觸器(qi)(qi)電(dian)(dian)磁線圈(quan)的電(dian)(dian)阻是(shi)否(fou)損壞。

3.2按下(xia)起(qi)動按鈕后電機運行(xing)，松開電機停止

測量停止(zhi)按(an)鈕(niu)常閉端是(shi)(shi)否(fou)通路，若不通則(ze)拆(chai)開(kai)按(an)鈕(niu)，清(qing)理觸(chu)(chu)(chu)(chu)點(dian)或(huo)更(geng)換按(an)鈕(niu)；檢(jian)查(cha)KM接觸(chu)(chu)(chu)(chu)器(qi)常開(kai)輔(fu)(fu)助(zhu)(zhu)點(dian)在閉合狀(zhuang)態時(shi)(shi)是(shi)(shi)否(fou)通路，若不通則(ze)拆(chai)開(kai)清(qing)理觸(chu)(chu)(chu)(chu)點(dian)或(huo)更(geng)換接觸(chu)(chu)(chu)(chu)器(qi)，或(huo)用(yong)外加常開(kai)輔(fu)(fu)助(zhu)(zhu)觸(chu)(chu)(chu)(chu)頭的常開(kai)輔(fu)(fu)助(zhu)(zhu)觸(chu)(chu)(chu)(chu)點(dian)替換；檢(jian)查(cha)KM接觸(chu)(chu)(chu)(chu)器(qi)起動(dong)按(an)下時(shi)(shi)觸(chu)(chu)(chu)(chu)頭是(shi)(shi)否(fou)有彈(dan)跳(tiao)，若有彈(dan)跳(tiao)，則(ze)檢(jian)查(cha)KM接觸(chu)(chu)(chu)(chu)器(qi)的電磁銜鐵表面(mian)是(shi)(shi)否(fou)有異物或(huo)油污(wu)等，由跳(tiao)動(dong)導致的常開(kai)觸(chu)(chu)(chu)(chu)點(dian)無法閉合，需(xu)拆(chai)開(kai)清(qing)理或(huo)更(geng)換接觸(chu)(chu)(chu)(chu)器(qi)。

3.3按下起動(dong)按鈕后(hou)接觸器動(dong)作(zuo)，但電動(dong)機不運(yun)轉檢查主回路

KM接(jie)(jie)觸(chu)(chu)器(qi)(qi)主觸(chu)(chu)點和熱過載繼電(dian)器(qi)(qi)主回路，確(que)認(ren)電(dian)動機(ji)電(dian)源線是否有掉線斷開(kai)的(de)現象；檢查KMY接(jie)(jie)觸(chu)(chu)器(qi)(qi)是否正常(chang)；檢查時(shi)間繼電(dian)器(qi)(qi)是否正常(chang)工作，時(shi)間繼電(dian)器(qi)(qi)的(de)常(chang)閉(bi)觸(chu)(chu)點是否導通；檢查KMY接(jie)(jie)觸(chu)(chu)器(qi)(qi)線圈(quan)是否燒壞，KM△接(jie)(jie)觸(chu)(chu)器(qi)(qi)的(de)常(chang)閉(bi)觸(chu)(chu)點是否通路。

3.4三角形起動運行未切換

檢(jian)(jian)查時間(jian)繼(ji)(ji)電(dian)器二次起(qi)動輸出是(shi)否正常，檢(jian)(jian)查KMY接觸(chu)器常閉(bi)輔助觸(chu)點是(shi)否通路，檢(jian)(jian)查KM△接觸(chu)器的(de)主觸(chu)點是(shi)否燒壞，檢(jian)(jian)查時間(jian)繼(ji)(ji)電(dian)器延時時間(jian)是(shi)否設置太短，電(dian)機負荷過重。

3.5星三(san)角切換時(shi)KM△接觸(chu)器(qi)主觸(chu)頭出現(xian)火花

如果轉換時間設置過短，電(dian)動(dong)(dong)(dong)(dong)機星(xing)形起動(dong)(dong)(dong)(dong)沒(mei)(mei)有(you)完成，電(dian)動(dong)(dong)(dong)(dong)機的(de)轉速也還沒(mei)(mei)有(you)達到額(e)定轉速，起動(dong)(dong)(dong)(dong)電(dian)流(liu)還很大的(de)時候進(jin)行(xing)切換，則KM△接觸器(qi)所承受(shou)的(de)電(dian)流(liu)依然是起動(dong)(dong)(dong)(dong)電(dian)流(liu)，而(er)產(chan)生打火(huo)；星(xing)三角起動(dong)(dong)(dong)(dong)時間與電(dian)動(dong)(dong)(dong)(dong)機功率和(he)起動(dong)(dong)(dong)(dong)負荷有(you)關。

4結束語

大功率電動(dong)機(ji)星三角(jiao)起動(dong)控(kong)制(zhi)(zhi)實訓系統基于企(qi)(qi)(qi)業(ye)(ye)工(gong)作典型任務實施(shi)過程(cheng)，引入企(qi)(qi)(qi)業(ye)(ye)項目(mu)的(de)設計文件和(he)工(gong)藝(yi)文件，能(neng)讓學(xue)生(sheng)(sheng)系統地(di)認識企(qi)(qi)(qi)業(ye)(ye)工(gong)作任務實施(shi)過程(cheng)，了解(jie)和(he)認識企(qi)(qi)(qi)業(ye)(ye)電氣控(kong)制(zhi)(zhi)電路(lu)安(an)裝與(yu)調試工(gong)作任務實施(shi)的(de)要求(qiu)、工(gong)藝(yi)路(lu)線、工(gong)藝(yi)規(gui)(gui)范和(he)工(gong)作標(biao)準。結合高職院校學(xue)生(sheng)(sheng)學(xue)情和(he)教(jiao)育教(jiao)學(xue)的(de)規(gui)(gui)律(lv)開展教(jiao)學(xue)任務實施(shi)，完善(shan)教(jiao)學(xue)中的(de)教(jiao)學(xue)演示(shi)、操作模板和(he)評價標(biao)準，更(geng)(geng)直(zhi)觀地(di)展示(shi)星三角(jiao)減(jian)壓(ya)起動(dong)控(kong)制(zhi)(zhi)運行的(de)過程(cheng)和(he)切(qie)換的(de)現象(xiang)，使學(xue)生(sheng)(sheng)更(geng)(geng)易于理(li)解(jie)工(gong)作原理(li)，更(geng)(geng)好(hao)(hao)地(di)掌握安(an)裝調試的(de)工(gong)藝(yi)規(gui)(gui)范和(he)企(qi)(qi)(qi)業(ye)(ye)標(biao)準要求(qiu)，使評價考核更(geng)(geng)有針(zhen)對性、更(geng)(geng)加客觀，該實訓系統在教(jiao)學(xue)實踐中應用效(xiao)果(guo)良好(hao)(hao)。

作者：魏國蓮 單位：青海高等職業(ye)技術學院