電氣控制技術(shù) 其他常見控制電路 學(xué)習(xí)課件

其他常見控制電路分析主講人：郝稱意直流電動(dòng)機(jī)的分類：并勵(lì)電動(dòng)機(jī)：勵(lì)磁線圈與轉(zhuǎn)子電樞并聯(lián)到同一電源上。串勵(lì)電動(dòng)機(jī)：勵(lì)磁線圈與轉(zhuǎn)子電樞串聯(lián)接到同一電源上復(fù)勵(lì)電動(dòng)機(jī)：勵(lì)磁線圈與轉(zhuǎn)子電樞的聯(lián)接有串有并，接同一電源上。M他勵(lì)UfIfIaUM并勵(lì)UIfM串勵(lì)UM復(fù)勵(lì)U他勵(lì)電動(dòng)機(jī)：勵(lì)磁線圈與轉(zhuǎn)子電樞的電源分開。永磁機(jī)勵(lì)磁機(jī)1、要限制Iast的措施：（1）啟動(dòng)時(shí)在電樞回路串電阻。（2）啟動(dòng)時(shí)降低電樞電壓。啟動(dòng)時(shí),n=0Iast太大會(huì)使換向器產(chǎn)生嚴(yán)重的火花，燒壞換向器。一般Iast限制在(2-2.5)IaN內(nèi)。一、直流電動(dòng)機(jī)的起動(dòng)控制線路起動(dòng)特點(diǎn)和注意事項(xiàng)

E=0，若加入額定電壓，則由于勵(lì)磁轉(zhuǎn)矩T=KT

Ia，

而

0

，電機(jī)將不能啟動(dòng)，2、注意直流機(jī)在啟動(dòng)時(shí)，勵(lì)磁電路不能斷開，而且啟動(dòng)時(shí)要滿勵(lì)磁。否則，可能產(chǎn)生以下事故：因此，反電動(dòng)勢(shì)為零，電樞電流會(huì)很大，電樞繞組有被燒毀的危險(xiǎn)。一、直流電動(dòng)機(jī)的起動(dòng)控制線路起動(dòng)特點(diǎn)和注意事項(xiàng)措施：他勵(lì)直流電動(dòng)機(jī)一定要有失磁保護(hù)。一般在勵(lì)磁繞組加失壓繼電器或欠流繼電器。當(dāng)失壓或欠流時(shí)，自動(dòng)切斷電樞電源U。M他勵(lì)UfIfIaU1、并勵(lì)直流電動(dòng)機(jī)的起動(dòng)控制線路特點(diǎn)：負(fù)載變化時(shí)，轉(zhuǎn)速n的變化不大，屬硬機(jī)械特性。應(yīng)用：恒轉(zhuǎn)矩的生產(chǎn)機(jī)械(TL一定，和轉(zhuǎn)速無關(guān)），如：金屬加工、起重機(jī)械等。KMKMRMQSE1E2SB2KMKMSB1KAKA+-U>QFKT1KT1KM1KM2L+KM2LKM1SB2KA1KA2SB1KA2KA1I>KM1KM1KM3R2KM11.電樞回路串電阻二級(jí)啟動(dòng)控制線路（2）I<MR1KM1KT2KM3電路分析KT2QFKT1KT1KM1KM2L+KM2LKM1SB2KA1KA2SB1KA2KA1I>KM1KM1KM3R2KM1I<MR1KM1KT2KM3合上電源開關(guān)QS，勵(lì)磁繞組得電，KA1線圈得電，KT1,KT2線圈得電KT21.電樞回路串電阻二級(jí)啟動(dòng)控制線路（2）QFKT1KT1KM1KM2L+KM2LKM1SB2KA1KA2SB1KA2KA1I>KM1KM1KM3R2KM1I<MR1KM1KT2KM3啟動(dòng):按下SB1KM1線圈得電，KM1觸頭閉合,電動(dòng)機(jī)串聯(lián)電阻啟動(dòng)，KM1動(dòng)斷觸頭斷開，KT1,KT2線圈失電KT21.電樞回路串電阻二級(jí)啟動(dòng)控制線路（2）QFKT1KT1KM1KM2L+KM2LKM1SB2KA1KA2SB1KA2KA1I>KM1KM1KM3R2KM1I<MR1KM1KT2KM3繼續(xù)啟動(dòng):KT1經(jīng)過整定時(shí)間，KT1動(dòng)斷觸頭延時(shí)閉合,KM2線圈得電KM2觸頭閉合，電動(dòng)機(jī)串聯(lián)R2繼續(xù)啟動(dòng)KT21.電樞回路串電阻二級(jí)啟動(dòng)控制線路（2）QFKT1KT1KM1KM2L+KM2LKM1SB2KA1KA2SB1KA2KA1I>KM1KM1KM3R2KM1I<MR1KM1KT2KM3KT2經(jīng)過整定時(shí)間KT2動(dòng)斷觸頭延時(shí)閉合,KM3線圈得電KM3觸頭閉合切除全部電阻電動(dòng)機(jī)全速運(yùn)行KT21.電樞回路串電阻二級(jí)啟動(dòng)控制線路（2）2、串勵(lì)直流電動(dòng)機(jī)的起動(dòng)控制線路（1）工作過程：KM2KM3KM1R1MD1D2R2KM1KM1SB1SB2KT1(KM2KM3KT2(KT2KM1KT1QS+-2、串勵(lì)直流電動(dòng)機(jī)的起動(dòng)控制線路QSKM2KM3KM1R1MD1D2R2KM1KM1SB1SB2KT1(KM2KM3KT2(合上電源開關(guān)QS：KT2KM1KT1(按下SB2KT1KT1延時(shí)到KM2KT2(KT2開始計(jì)時(shí)KT2延時(shí)到KM3正常運(yùn)行KT1開始計(jì)時(shí)+-QFKT1KT1KM1KM2L+KM2LSB2SB1KM1KM1KM3R22.自動(dòng)啟動(dòng)控制線路MR1KM1KT2KM3電路組成分析KT2QFKT1KT1KM1KM2L+KM2LSB2SB1KM1KM1KM3R22.自動(dòng)啟動(dòng)控制線路MR1KM1KT2KM3KT2合上電源開關(guān)QFQFKT1KT1KM1KM2L+KM2LSB2SB1KM1KM1KM3R22.自動(dòng)啟動(dòng)控制線路MR1KM1KT2KM3KT2按下SB1KM1線圈得電QFKT1KT1KM1KM2L+KM2LSB2SB1KM1KM1KM3R22.自動(dòng)啟動(dòng)控制線路MR1KM1KT2KM3KT2KT2經(jīng)過整定時(shí)間KT2動(dòng)斷觸頭延時(shí)閉合進(jìn)入正常工作QFKT1KT1KM1KM2L+KM2LSB2SB1KM1KM1KM3R22.自動(dòng)啟動(dòng)控制線路MR1KM1KT2KM3KT2按下SB2，電動(dòng)機(jī)停轉(zhuǎn)串勵(lì)電動(dòng)機(jī)使用時(shí)，切忌空載或輕載運(yùn)行2、串勵(lì)直流電動(dòng)機(jī)的起動(dòng)控制線路應(yīng)用：用于恒功率負(fù)載（P一定時(shí)，T和n成反比），如：電氣機(jī)車等。特點(diǎn):串勵(lì)與并勵(lì)直流電動(dòng)機(jī)相比，主要有以下1是具有較大的啟動(dòng)轉(zhuǎn)矩，（T∝Ia2)啟動(dòng)性能好。2是過載能力較強(qiáng)。3隨負(fù)載轉(zhuǎn)矩的增大，n下降得很快，屬軟機(jī)械特性。３、他勵(lì)直流電動(dòng)機(jī)的起動(dòng)控制線路工作過程：

QS2KM2KM3KM1R1MR2KM1KT1KT2KT1(KM2KM3KT2(KM1KM1SB1SB2F1F2QS1+-+-３、他勵(lì)直流電動(dòng)機(jī)的起動(dòng)控制線路合上電源開關(guān)QS1、QS2：

QS2KM2KM3KM1R1MR2F1F2QS1KM1KT1KT2KT1(KM2KM3KT2(KM1KM1SB1SB2KT2(KT1(按下SB2：

KT1、KT2開始計(jì)時(shí)KT1、延時(shí)到KT2延時(shí)到正常運(yùn)行KM2KM3+-+-３、他勵(lì)直流電動(dòng)機(jī)的起動(dòng)控制線路特點(diǎn)與應(yīng)用：同并勵(lì)直流電動(dòng)機(jī)

QS2KM2KM3KM1R1MR2F1F2QS1KM1KM1SB1SB2KM1KT1KT2KT1(KM2KM3KT2(I＜失磁保護(hù)+-+-（1）改變勵(lì)磁電流的方向（2）改變電樞電流的方向改變直流電機(jī)轉(zhuǎn)向（改變電磁力矩）的方法：二、直流電動(dòng)機(jī)的正反轉(zhuǎn)控制線路FFU+–NS電刷換向片II直流電動(dòng)機(jī)工作原理（串勵(lì)）（并勵(lì)和他勵(lì)）1、并勵(lì)直流電動(dòng)機(jī)的正反轉(zhuǎn)控制線路

（改變電樞電流的方向）KM1KM1RMQSE1E2SB2KMKMSB1KAKA+-KM2KM2E1E2SB3KM2KM1SB2KM2KM1KM1KM2SB1KM3KM2KM2KM1SB2KM2KM3KM1KM2KAL+L-KTKAKM2SB3KM1SB1KTKM1KM1MR并勵(lì)直流電機(jī)正反轉(zhuǎn)控制線路I＜QFKM2KM1電路分析KM2KM1KM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MR并勵(lì)直流電機(jī)正反轉(zhuǎn)控制線路I＜KM2KM1正轉(zhuǎn)啟動(dòng):合上QF勵(lì)磁繞組得電勵(lì)磁線圈KA得電，動(dòng)合觸頭閉合KT線圈得電，延時(shí)閉合瞬時(shí)斷開觸頭斷開KM2KM1L+L-QFKM3KM1KM2KAKTKM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRI＜KM2KM1按下SB1KM1線圈得電，KM1觸頭動(dòng)作電動(dòng)機(jī)串聯(lián)電阻正轉(zhuǎn)起動(dòng)KT線圈失電KM2KM1L+L-QF并勵(lì)直流電機(jī)正反轉(zhuǎn)控制線路KM3KM1KM2KAKTKM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRI＜KM2KM1KT經(jīng)過整定時(shí)間KT動(dòng)斷觸頭延時(shí)閉合,KM3線圈得電KM3觸頭閉合切除電阻電動(dòng)機(jī)全速運(yùn)行KM2KM1L+L-QF并勵(lì)直流電機(jī)正反轉(zhuǎn)控制線路KM3KM1KM2KAKTKM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRI＜KM2KM1停:按下SB3KM2KM1L+L-QF并勵(lì)直流電機(jī)正反轉(zhuǎn)控制線路KM3KM1KM2KAKTKM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRI＜KM2KM1反轉(zhuǎn)啟動(dòng):合上QF勵(lì)磁繞組得電勵(lì)磁線圈KA得電，動(dòng)合觸頭閉合KT線圈得電，延時(shí)閉合瞬時(shí)斷開觸頭斷開KM2KM1L+L-QF并勵(lì)直流電機(jī)正反轉(zhuǎn)控制線路KM3KM1KM2KAKTKM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRI＜KM2KM1按下SB2KM2線圈得電，KM2觸頭動(dòng)作電動(dòng)機(jī)串聯(lián)電阻反轉(zhuǎn)起動(dòng)KT線圈失電KM2KM1L+L-QF并勵(lì)直流電機(jī)正反轉(zhuǎn)控制線路KM3KM1KM2KAKTKM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRI＜KM2KM1KT經(jīng)過整定時(shí)間KT動(dòng)斷觸頭延時(shí)閉合,KM3線圈得電KM3觸頭閉合切除電阻電動(dòng)機(jī)全速運(yùn)行KM2KM1L+L-QF并勵(lì)直流電機(jī)正反轉(zhuǎn)控制線路KM3KM1KM2KAKT2、他勵(lì)直流電動(dòng)機(jī)正反轉(zhuǎn)控制線路QS2KM2KM3F1F2QS1KM1KT1KT2KT1(KM2KM3KT2(KM1KM1SB1SB2KM2KM2KM2KM1R1MR2KM1+-+-（改變電樞電流的方向）KM2SB3KM2KM1SB2KM1KM1KM2SB1I＜3、串勵(lì)直流電動(dòng)機(jī)的正反轉(zhuǎn)起動(dòng)控制線路QSKM2KM3KM1R1MD1D2R2KT1(KM2KM3KT2(KT2KM1KT1KM1KM1SB1SB2KM2KM2+-（改變勵(lì)磁繞組電流的方向）3、串勵(lì)直流電動(dòng)機(jī)的正反轉(zhuǎn)起動(dòng)控制線路QSKT1(KM2KM3KT2(KM1KT1KM1KM1SB1SB2KM2KM3KM1R1MD1D2R2KT2KM1KM1KM4KM4KM1KM1SB1SB2+-KM1SB3KM1KM2SB2KM2KM2KM1SB1（改變勵(lì)磁繞組電流的方向）3、串勵(lì)直流電動(dòng)機(jī)的正反轉(zhuǎn)起動(dòng)控制線路QSKT1(KM2KM3KT2(KM1KT1KM2KM3KM1R1MD1D2R2KT2KM1KM1KM4KM4KM4+-KM1SB3KM1KM2SB2KM4KM4KM1SB1KM4KM1KT1(KM2KM3KT2(（改變勵(lì)磁繞組電流的方向）KM3KM2KM2KM1SB2KM2KM3KM1KM2L+L-KTKM2SB3KM1SB1KM1KM1R串勵(lì)直流電機(jī)正反轉(zhuǎn)控制線路QFKM2KM1KT動(dòng)斷觸頭延時(shí)閉合，KM3得電，起動(dòng)過程結(jié)束KM2KM1MKT

停止時(shí)用一個(gè)和電動(dòng)機(jī)實(shí)際旋轉(zhuǎn)方向相反的電磁力矩，作為制動(dòng)力矩，迫使電動(dòng)機(jī)迅速停轉(zhuǎn)，機(jī)械制動(dòng)：電氣制動(dòng)：制動(dòng)分類依靠機(jī)械裝置的摩擦力使電動(dòng)機(jī)迅速停止三、直流電動(dòng)機(jī)的制動(dòng)反接制動(dòng)能耗制動(dòng)發(fā)電回饋制動(dòng)比較準(zhǔn)確直流電動(dòng)機(jī)能耗制動(dòng)原理U+–NSIIFFEE發(fā)電機(jī)RZD1、能耗制動(dòng)I`I`FFRZD的選擇：一般按IaZD≤2IaN能耗制動(dòng)：停止時(shí)，在勵(lì)磁電流不變的情況下，切斷電樞繞組的電源后，在電樞繞組上并接電阻RZD構(gòu)成回路，使機(jī)械能轉(zhuǎn)換為電能消耗在RZD上QS2KM2KM3KM1R1MR2KM1KT1KT2KT1(KM2KM3KT2(KM1KM1SB1SB2F1F2QS1+-+-1)他勵(lì)電動(dòng)機(jī)的能耗制動(dòng)

KM1RZDKM1RZD選擇：使IZD≤2IaNI＜2）并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)線路KMKMRMQSE1E2SB2KMKMSB1KAKA+-U>RZDKME1E2L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)原理I<KM3SB2KM1KM1RBKAMU＜KM4KM4KM3KT2R1R2AKM1L合上QFL+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)原理I<KM3SB2KM1KM1RBKAMU＜KM4KM4KM3KT2R1R2AKM1L按下SB1L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)原理I<KM3SB2KM1KM1RBKAMU＜KM4KM4KM3KT2R1R2AKM1LKT1瞬時(shí)斷開延時(shí)閉合觸頭閉合L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)原理I<KM3SB2KM1KM1RBKAMU＜KM4KM4KM3KT2R1R2AKM1LKT2瞬時(shí)斷開延時(shí)閉合觸頭閉合L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)原理I<KM3SB2KM1KM1RBKAMU＜KM4KM4KM3KT2R1R2AKM1L按下SB2L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)原理I<KM3SB2KM1KM1RBKAMU＜KM4KM4KM3KT2R1R2AKM1LKV閉合KM2線圈得電KM2閉合能耗制動(dòng)開始L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)原理I<KM3SB2KM1KM1RBKAMU＜KM4KM4KM3KT2R1R2AKM1L速度減小到一定值時(shí),KV分?jǐn)郘+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)原理I<KM3SB2KM1KM1RBKAMU＜KM4KM4KM3KT2R1R2AKM1L電動(dòng)機(jī)停轉(zhuǎn)QSKT1(KM2KM3KT2(KM1KT1KM1KM1SB1SB2KM2KM3KM1R1MD1D2R2KT2KM1+-3）串勵(lì)直流電動(dòng)機(jī)的能耗制動(dòng)串勵(lì)直流電動(dòng)機(jī)的能耗制動(dòng)分為自勵(lì)式和他勵(lì)式兩種。(1)自勵(lì)式能耗制動(dòng)自勵(lì)式能耗制動(dòng)是指當(dāng)電動(dòng)機(jī)斷開電源后，將勵(lì)磁繞組反接并與電樞繞組和制動(dòng)電阻串聯(lián)構(gòu)成閉合回路，使慣性運(yùn)轉(zhuǎn)的電樞處于自勵(lì)發(fā)電狀態(tài)，產(chǎn)生與原方向相反的電流和電磁轉(zhuǎn)矩，迫使電動(dòng)機(jī)迅速停轉(zhuǎn)。KM3KVKM1SB2KM2KM3KM1KM2L+L-KTKM2SB2KM1SB1KTKM1KM1R串勵(lì)直流電動(dòng)機(jī)自勵(lì)式能耗制動(dòng)控制電路QFKM2KM1合上電源開關(guān)QFKM2KM1MKM2KM1KVKM2RBKM3KVKM1SB2KM2KM3KM1KM2L+L-KTKM2SB2KM1SB1KTKM1KM1R串勵(lì)直流電動(dòng)機(jī)自勵(lì)式能耗制動(dòng)控制電路QFKM2KM1起動(dòng)控制：按下SB1，電動(dòng)機(jī)串聯(lián)電阻R起動(dòng)，KT線圈失電KM2KM1MKM2KM1KVKM2RBKM3KVKM1SB2KM2KM3KM1KM2L+L-KTKM2SB2KM1SB1KTKM1KM1R串勵(lì)直流電動(dòng)機(jī)自勵(lì)式能耗制動(dòng)控制電路QFKM2KM1KT動(dòng)斷觸頭延時(shí)閉合，KM3得電，起動(dòng)過程結(jié)束KM2KM1MKM2KM1KVKM2RBKM3KVKM1SB2KM2KM3KM1KM2L+L-KTKM2SB2KM1SB1KTKM1KM1R串勵(lì)直流電動(dòng)機(jī)自勵(lì)式能耗制動(dòng)控制電路QFKM2KM1當(dāng)速度降低到較低時(shí)，KV釋放，各電器觸頭復(fù)位，制動(dòng)結(jié)束。KM2KM1MKM2KM1KVKM2RB

(2)他勵(lì)式能耗制動(dòng)制動(dòng)時(shí)，切斷電動(dòng)機(jī)電源，將電樞繞組與放電電阻R1接通，將勵(lì)磁繞組與電樞繞組斷開后串入分壓電阻R2，再接入外加直流電源勵(lì)磁。QSKT1(KM2KM3KT2(KM1KT1KM1KM1SB1SB2KM2KM3KM1R1MD1D2R2KT2KM1+-3）串勵(lì)直流電動(dòng)機(jī)的他勵(lì)能耗制動(dòng)RZDKM1KM1SB2KM1KM2L+L-KM2SB1SQ2R3QFKM2KM1電路組成分析KM2KM1MKM2KM1SQ1RR1R2串勵(lì)直流電動(dòng)機(jī)（作伺服電動(dòng)機(jī)）他勵(lì)式能耗制動(dòng)控制電路KM1SB2KM1KM2L+L-KM2SB1SQ2R3串勵(lì)直流電動(dòng)機(jī)（作伺服電動(dòng)機(jī)）他勵(lì)式能耗制動(dòng)控制電路QFKM2KM1合上電源開關(guān)QFKM2KM1MKM2KM1SQ1RR1R2KM1SB2KM1KM2L+L-KM2SB1SQ2R3串勵(lì)直流電動(dòng)機(jī)（作伺服電動(dòng)機(jī)）他勵(lì)式能耗制動(dòng)控制電路QFKM2KM1按下SB1KM2KM1MKM2KM1SQ1RR1R2KM1SB2KM1KM2L+L-KM2SB1SQ2R3串勵(lì)直流電動(dòng)機(jī)（作伺服電動(dòng)機(jī)）他勵(lì)式能耗制動(dòng)控制電路QFKM2KM1松開SB1KM2KM1MKM2KM1SQ1RR1R2KM1SB2KM1KM2L+L-KM2SB1SQ2R3串勵(lì)直流電動(dòng)機(jī)（作伺服電動(dòng)機(jī)）他勵(lì)式能耗制動(dòng)控制電路QFKM2KM1按下SB2KM2KM1MKM2KM1SQ1RR1R2２反接制動(dòng)直流電動(dòng)機(jī)反接制動(dòng)原理U+–NSIIFFEEU+–IZIZFF注意事項(xiàng)１)Ｕ＋Ｅ＝ＩZRa

,必須串電阻限流:2)必須采取防反轉(zhuǎn)措施定義：停止時(shí)在維持勵(lì)磁電流方向不變的情況下，改變電樞電流的方向來制動(dòng)L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1I<KM3KM1KM4KT2L電路組成分析MKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM4KM5KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1I<KM3KM1KM4KT2L合上QFMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KM4KM5L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1I<KM3KM1KM4KT2L按下SB1KM1線圈得電MKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KM4KM5L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1I<KM3KM1KM4KT2LKM1觸頭動(dòng)作電動(dòng)機(jī)串聯(lián)全部電阻啟動(dòng)MKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KM4KM5L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1I<KM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KT1經(jīng)過整定時(shí)間KT1動(dòng)斷觸頭延時(shí)閉合,KM6線圈得電KM6觸頭閉合電動(dòng)機(jī)串聯(lián)R2繼續(xù)啟動(dòng)KM4KM5L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1I<KM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KV線圈升高到一定值KV觸頭閉合電動(dòng)機(jī)串聯(lián)R2繼續(xù)啟動(dòng)KM4KM5L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1I<KM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KT2經(jīng)過整定時(shí)間KT2動(dòng)斷觸頭延時(shí)閉合,KM7線圈得電KM7觸頭閉合切除全部電阻電動(dòng)機(jī)繼續(xù)啟動(dòng)全速運(yùn)行KM4KM5L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1I<KM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2按下SB3KM1線圈失電KM4KM5L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1I<KM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KM1觸頭動(dòng)作KM4KM5L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1I<KM3