電力拖動(dòng)接線課件

電動(dòng)機(jī)控制電路電力拖動(dòng)接線電動(dòng)機(jī)的聯(lián)接三相電動(dòng)機(jī)有三個(gè)定子繞組，分別用U、V、W表示，每個(gè)繞組有兩端，所以一共有六個(gè)接線端電動(dòng)機(jī)的聯(lián)接有兩種方式，一種為星型聯(lián)接，另一種為三角型聯(lián)接星型接法三角型接法電力拖動(dòng)接線電動(dòng)機(jī)的聯(lián)接星型接法三角型接法U1V1W2U2W1V2U1V1W2U2W1V2L1L2L3L1L2L3L1L3L2L1L2L3電力拖動(dòng)接線直接控制原理

合上QS

,電動(dòng)機(jī)啟動(dòng)。

啟動(dòng)FU3~MQS優(yōu)點(diǎn)：設(shè)備簡(jiǎn)單，安裝容易缺點(diǎn)：只適用于小功率不頻繁啟動(dòng)保護(hù)：短路保護(hù)、漏電保護(hù)EL1L2L3UVWU11V11W11線碼：同一導(dǎo)線線碼相同經(jīng)過(guò)用電器線碼改變電力拖動(dòng)接線QSKM1KM2SB1SB2KHU11V11W11U11V11W11L1L2L3UVWSB3電力拖動(dòng)接線KMKH..SB控制電路

KH3~MKMEQSFU1FU2主電路L1L2L3點(diǎn)動(dòng)控制原理

按下按鈕SB

,

KM線圈得電KM主觸點(diǎn)閉合,電動(dòng)機(jī)啟動(dòng)。得電

啟動(dòng)電力拖動(dòng)接線KMKH..SB控制電路

KH3~MKMEQSFU1FU2主電路L1L2L3點(diǎn)動(dòng)控制原理

松開(kāi)按鈕SB

,

KM線圈斷電KM主觸點(diǎn)斷開(kāi),電動(dòng)機(jī)停轉(zhuǎn)。失電

停止電力拖動(dòng)接線點(diǎn)動(dòng)控制原理KMKH..SB

KH3~MKMEQSFU1FU2L1L2L3線碼UVWU11V11W11U12V12W12U13V13W130123電力拖動(dòng)接線QSKM1KM2SB1SB2KHU11V11W11V12U12W12U11V11W11U12V12U13V13W13U12V12W12U13V13W13L1L2L3UVW11SB3330022電力拖動(dòng)接線連續(xù)控制原理KMKH..SB2

KH3~MKMEQSFU1FU2L1L2L3KM

啟動(dòng)得電SB1合上開(kāi)關(guān)QS按下起動(dòng)按鈕SB2

,KM線圈得電，KM主觸點(diǎn)閉合，電動(dòng)機(jī)運(yùn)轉(zhuǎn)。KM輔助觸點(diǎn)閉合自鎖。松開(kāi)起動(dòng)按鈕SB2電力拖動(dòng)接線連續(xù)控制原理KMKH..SB2

KH3~MKMEQSFU1FU2L1L2L3KM

停止失電SB1按下停止按鈕SB1

,KM線圈失電，KM主觸點(diǎn)斷開(kāi)，電動(dòng)機(jī)停止。KM輔助觸點(diǎn)斷開(kāi)，解自鎖。電力拖動(dòng)接線連續(xù)控制原理KMKH..SB2

KH3~MKMEQSFU1FU2L1L2L3KMSB1電路保護(hù)短路保護(hù)熔斷器熱繼電器過(guò)載保護(hù)接地漏電保護(hù)接觸器失壓保護(hù)電力拖動(dòng)接線連續(xù)控制原理KMKH..SB2

KH3~MKMEQSFU1FU2L1L2L3KMSB1線碼UVWU11V11W11U12V12W12U13V13W1301234..電力拖動(dòng)接線QSKM1KM2SB1SB2KHU11V11W11V12U12W12U11V11W11U12V12U13V13W13U12V12W12U13V13W13L1L2L3UVW11SB32233344400電力拖動(dòng)接線電動(dòng)機(jī)正反轉(zhuǎn)的控制線路

將電動(dòng)機(jī)接到電源的任意兩根線對(duì)調(diào)一下，即可使電動(dòng)機(jī)反轉(zhuǎn)。

需要用兩個(gè)接觸器來(lái)實(shí)現(xiàn)這一要求。

當(dāng)正轉(zhuǎn)接觸器工作時(shí)，電動(dòng)機(jī)正轉(zhuǎn)；

當(dāng)反轉(zhuǎn)接觸器工作時(shí)，將電動(dòng)機(jī)接到電源的任意兩根聯(lián)線對(duì)調(diào)一下，電動(dòng)機(jī)反轉(zhuǎn)。演示電力拖動(dòng)接線連續(xù)正反轉(zhuǎn)控制原理L1L2L3KH..SB2

KH3~MKM1EQSFU1FU2KM1SB1.....SB3KM2KM1KM2KM2......KM1KM2電力拖動(dòng)接線連續(xù)正反轉(zhuǎn)控制原理L1L2L3SB2和SB3決不允許同時(shí)按下，否則造成電源兩相短路。正轉(zhuǎn)按鈕反轉(zhuǎn)按鈕反轉(zhuǎn)接觸器正轉(zhuǎn)接觸器反轉(zhuǎn)觸點(diǎn)正轉(zhuǎn)觸點(diǎn)KH..SB2

KH3~MKM1EQSFU1FU2KM1SB1.....SB3KM2KM1KM2KM2......KM1KM2電力拖動(dòng)接線連續(xù)正反轉(zhuǎn)控制原理L1L2L3.FU1..

KH3~MKM1EQS....KM2FU2KHSB2KM1SB1SB3KM2KM1KM2......電力拖動(dòng)接線連續(xù)正反轉(zhuǎn)控制原理L1L2L3.FU1FU2.KH.SB2

KH3~MKM1EQSKM1SB1....SB3KM2KM1KM2KM2......合上QS,按下正轉(zhuǎn)啟動(dòng)按鈕SB2，常閉觸點(diǎn)斷開(kāi)，互鎖；常開(kāi)觸點(diǎn)閉合，KM1線圈得電，KM1主觸點(diǎn)閉合，電動(dòng)機(jī)正轉(zhuǎn)，KM1常開(kāi)輔助觸點(diǎn)閉合，自鎖電力拖動(dòng)接線連續(xù)正反轉(zhuǎn)控制原理L1L2L3.FU1FU2.KH.SB2

KH3~MKM1EQSKM1SB1....SB3KM2KM1KM2KM2......合上QS,按下反轉(zhuǎn)啟動(dòng)按鈕SB2，常閉觸點(diǎn)斷開(kāi)，互鎖；常開(kāi)觸點(diǎn)閉合，KM2線圈得電，KM2主觸點(diǎn)閉合，電動(dòng)機(jī)正轉(zhuǎn)，KM2常開(kāi)輔助觸點(diǎn)閉合，自鎖電力拖動(dòng)接線連續(xù)正反轉(zhuǎn)控制原理FU2KHSB2KM1SB1SB3KM2KM1KM2......合上QS,按下正轉(zhuǎn)啟動(dòng)按鈕SB2，反轉(zhuǎn)停止，正轉(zhuǎn)啟動(dòng)。先斷開(kāi)失電閉合得電斷開(kāi)閉合電力拖動(dòng)接線連續(xù)正反轉(zhuǎn)控制原理L1L2L3.FU1FU2.KH.SB2

KH3~MKM1EQSKM1SB1....SB3KM2KM1KM2KM2......U11V11W11V12U12W12U13V13W13UVW01234567線碼電力拖動(dòng)接線QSKM1KM2SB1SB2KHU11V11W11V12U12W12U11V11W11U12V12U13V13W13U12V12W12U12V12W12U13V13W13U13V13W13L1L2L3UVW11SB333333224445500066677電力拖動(dòng)接線FU2FRSB2SB1KM1.....SB3KM1102345電力拖動(dòng)接線FRSB2FU2KM1SB1SB3KM2KM1KM2......KM1KM210234567電力拖動(dòng)接線FU2FRSB2KM1SB1SB3KM2KM1KM2......01234567電力拖動(dòng)接線FRSB2FU2KM3SB1KM1KM2.....KM1KM210234567KTKTKM1..電力拖動(dòng)接線FU2FRSB2KM1SB1SB3KM2KM1KM2......01234567KM1KM289電力拖動(dòng)接線FRSB2FU2KM2SB1KM1KM......KM1KM10234567KTKTKM1..KM28電力拖動(dòng)接線FU2FRSB2KM1SB1SB3KM2KM1KM2......01234567電力拖動(dòng)接線QSKM1KM2SB1SB2KH11SB333333224445500066677電力拖動(dòng)接線連續(xù)正反轉(zhuǎn)控制原理FU2KHSB2KM1SB1SB3KM2KM1KM2......01234567....SB4SB598電力拖動(dòng)接線QSSB1SB21SB333333KH1224766500079688KM1KM2SB4SB533779745電力拖動(dòng)接線連續(xù)正反轉(zhuǎn)控制原理FU2KHSB2KM1SB1SB3KM2KM1KM2......01234567....SB4SB598KM1KM2電力拖動(dòng)接線QSSB1SB21SB333333KH1224766500079688KM1KM2SB4SB533779745電力拖動(dòng)接線FRSB2FU2KM2