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IC086SLM084
IC086SLM084
IC086SLM084
傳統(tǒng)的鼠籠式異步電動機起、制動控制方式一般有四種，即定子回路串電阻起動，Y/△起動，自耦變壓器起動和延邊三角形起動;制動方式有三種，反接制動，能耗制動和電容制動，其中任何一種起，、制動控制方式的實現(xiàn)通常由繼電器-接觸器控制系統(tǒng)來完成。下面就以定子回路串電阻降壓起動和反接制動為例，分析由繼電器-接觸器實現(xiàn)的鼠籠式異步電動機的起、制動控制。如圖1所示，此控制電路含三個接觸器和一個中間繼電器線圈，12個觸點。起動時，KM2、KM3線圈均處于斷開狀態(tài)，按下起動按鈕SB1，KM1線圈通電并自鎖，電動機串電阻減壓起動。當(dāng)電動機轉(zhuǎn)速上升到某一定值時(此值為速度繼電器KS1的整定值，可調(diào)節(jié)，如調(diào)至100r/min時動作)，速度繼電器KS1的常開觸點閉和，中間繼電器KA通電并自鎖，KA的常開觸點接通接觸器線圈KM3，KM3的主觸點在主電路中短接定子電阻R，電動機轉(zhuǎn)速上升至給定值時投入穩(wěn)定運行。制動時，按下停機按鈕SB2，KM1線圈斷電，其主觸點斷開三相電源;控制電路中常開觸點斷開，KM3失電，限流電阻串入;常閉觸點閉合，接通反接制動接觸器KM2，對調(diào)兩相電源相序，電動機處于反接制動狀態(tài)。當(dāng)轉(zhuǎn)速下降至某一定值時(比如100r/min),KS1常開觸點斷開KA，繼而斷開KM2，電動機失電，迅速停機。傳統(tǒng)的鼠籠式異步電動機起、制動控制方式一般有四種，即定子回路串電阻起動，Y/△起動，自耦變壓器起動和延邊三角形起動;制動方式有三種，反接制動，能耗制動和電容制動，其中任何一種起，、制動控制方式的實現(xiàn)通常由繼電器-接觸器控制系統(tǒng)來完成。下面就以定子回路串電阻降壓起動和反接制動為例，分析由繼電器-接觸器實現(xiàn)的鼠籠式異步電動機的起、制動控制。如圖1所示，此控制電路含三個接觸器和一個中間繼電器線圈，12個觸點。起動時，KM2、KM3線圈均處于斷開狀態(tài)，按下起動按鈕SB1，KM1線圈通電并自鎖，電動機串電阻減壓起動。當(dāng)電動機轉(zhuǎn)速上升到某一定值時(此值為速度繼電器KS1的整定值，可調(diào)節(jié)，如調(diào)至100r/min時動作)，速度繼電器KS1的常開觸點閉和，中間繼電器KA通電并自鎖，KA的常開觸點接通接觸器線圈KM3，KM3的主觸點在主電路中短接定子電阻R，電動機轉(zhuǎn)速上升至給定值時投入穩(wěn)定運行。制動時，按下停機按鈕SB2，KM1線圈斷電，其主觸點斷開三相電源;控制電路中常開觸點斷開，KM3失電，限流電阻串入;常閉觸點閉合，接通反接制動接觸器KM2，對調(diào)兩相電源相序，電動機處于反接制動狀態(tài)。當(dāng)轉(zhuǎn)速下降至某一定值時(比如100r/min),KS1常開觸點斷開KA，繼而斷開KM2，電動機失電，迅速停機！ 企業(yè)名稱：廈門泰尼電氣有限公司
◆ 聯(lián)系人： 張敏
◆ 電話：0592-6809807
◆ 聯(lián)系手機：18144168456
◆ QQ:1480653152
◆ 傳真：0592-6890859 （備注“01016”收）
◆ E-mail： 1480653152@qq.com
◆ 主營業(yè)務(wù)：DCS,PLC
◆ 經(jīng)營模式： 貿(mào)易
◆ 貿(mào)易地區(qū)： 全國
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