課題十并勵(lì)直流電動(dòng)機(jī)的基本控制電路PPT課件

1、 直流電動(dòng)機(jī)具有啟動(dòng)轉(zhuǎn)矩大、調(diào)速范圍廣、調(diào)速精度高、能夠?qū)崿F(xiàn)無(wú)級(jí)平滑調(diào)速以及可以頻繁啟動(dòng)等一系列優(yōu)點(diǎn)。高精度切削機(jī)床 軋鋼機(jī)課題十 并勵(lì)直流電動(dòng)機(jī)的基本控制線路第1頁(yè)/共41頁(yè) 造紙機(jī) 龍門刨床 外型圖 內(nèi)部接線圖 第2頁(yè)/共41頁(yè)一、啟動(dòng)控制線路1.手動(dòng)啟動(dòng)控制線路BQ3直流電動(dòng)機(jī)啟動(dòng)變阻器外形圖 并勵(lì)直流電動(dòng)機(jī)手動(dòng)啟動(dòng)控制電路圖 05-分段靜觸頭 6-電磁鐵 7- 弧形銅條第3頁(yè)/共41頁(yè)QFKT1KT1KM1KM2L+KM2LKM1SB2KA1KA2SB1KA2KA1IKM1KM1KM3R2KM12.電樞回路串電阻二級(jí)啟動(dòng)控制線路IKM1KM1KM3R2KM1IKM1KM1KM3R2KM

2、1IKM1KM1KM3R2KM1IKM1KM1KM3R2KM1IMR1KM1KT2KM3KT2經(jīng)過(guò)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KT22.電樞回路串電阻二級(jí)啟動(dòng)控制線路第8頁(yè)/共41頁(yè)二、正反轉(zhuǎn)控制線路直流電動(dòng)機(jī)實(shí)現(xiàn)正反轉(zhuǎn)有電樞繞組反接法和勵(lì)磁繞組反接法兩種。第9頁(yè)/共41頁(yè)KM3KM2KM2KM1SB2KM2KM3KM1KM2KAL+L-KTKAKM2SB3KM1SB1KTKM1KM1MR并勵(lì)直流電機(jī)正反轉(zhuǎn)控制線路IQFKM2KM1電路分析KM2KM1第10頁(yè)/共41頁(yè)KM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1K

3、TKM1KM1MRIKM2KM1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(kāi)觸頭斷開(kāi)KM2KM1L+L-QFKM3KM1KM2KAKT并勵(lì)直流電機(jī)正反轉(zhuǎn)控制線路第11頁(yè)/共41頁(yè)KM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRIKM2KM1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-QFKM3KM1KM2KAKT并勵(lì)直流電機(jī)正反轉(zhuǎn)控制線路第12頁(yè)/共41頁(yè)KM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRIKM2KM1KT經(jīng)過(guò)整

4、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-QFKM3KM1KM2KAKT并勵(lì)直流電機(jī)正反轉(zhuǎn)控制線路第13頁(yè)/共41頁(yè)KM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRIKM2KM1停:按下SB3KM2KM1L+L-QFKM3KM1KM2KAKT并勵(lì)直流電機(jī)正反轉(zhuǎn)控制線路第14頁(yè)/共41頁(yè)KM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRIKM2KM1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(kāi)觸頭斷開(kāi)KM2KM1L+L-QF

5、KM3KM1KM2KAKT并勵(lì)直流電機(jī)正反轉(zhuǎn)控制線路第15頁(yè)/共41頁(yè)KM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRIKM2KM1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-QFKM3KM1KM2KAKT并勵(lì)直流電機(jī)正反轉(zhuǎn)控制線路第16頁(yè)/共41頁(yè)KM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRIKM2KM1KT經(jīng)過(guò)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-QFKM3KM1KM2KAKT并勵(lì)直流電機(jī)正反轉(zhuǎn)控制線

6、路第17頁(yè)/共41頁(yè) 能耗制動(dòng)是指保持直流電動(dòng)機(jī)的勵(lì)磁電流不變，將電樞繞組的電源切除后，立即使其與制動(dòng)電阻連接成閉合回路，電樞憑慣性處于發(fā)電運(yùn)行狀態(tài)，將動(dòng)能轉(zhuǎn)化為電能并消耗在電樞回路中，同時(shí)獲得制動(dòng)力矩，迫使電動(dòng)機(jī)迅速停轉(zhuǎn)。.能耗制動(dòng)控制線路三、制動(dòng)控制線路第18頁(yè)/共41頁(yè)L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)原理 IKM3SB2KM1KM1RBKAMUKM4KM4KM3KT2R1R2AKM1L電路組成分析第19頁(yè)/共41頁(yè)L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1 IK

7、M3SB2KM1KM1RBKAMUKM4KM4KM3KT2R1R2AKM1L合上QF并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)原理第20頁(yè)/共41頁(yè)L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1 IKM3SB2KM1KM1RBKAMUKM4KM4KM3KT2R1R2AKM1L按下SB1并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)原理第21頁(yè)/共41頁(yè)L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1 IKM3SB2KM1KM1RBKAMUKM4KM4KM3KT2R1R2AKM1LKT1瞬時(shí)斷開(kāi)延時(shí)閉合觸頭閉合并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)原理第22頁(yè)/共41頁(yè)

8、L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1 IKM3SB2KM1KM1RBKAMUKM4KM4KM3KT2R1R2AKM1LKT2瞬時(shí)斷開(kāi)延時(shí)閉合觸頭閉合并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)原理第23頁(yè)/共41頁(yè)L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1 IKM3SB2KM1KM1RBKAMUKM4KM4KM3KT2R1R2AKM1L按下SB2并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)原理第24頁(yè)/共41頁(yè)L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1 IKM3SB2KM1KM1RBKAM

9、UKM4KM4KM3KT2R1R2AKM1LKV閉合KM2線圈得電KM2閉合能耗制動(dòng)開(kāi)始并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)原理第25頁(yè)/共41頁(yè)L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1 IKM3SB2KM1KM1RBKAMUKM4KM4KM3KT2R1R2AKM1L速度減小到一定值時(shí),KV分?jǐn)嗖?lì)直流電動(dòng)機(jī)能耗制動(dòng)原理第26頁(yè)/共41頁(yè)L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1 IKM3SB2KM1KM1RBKAMUKM4KM4KM3KT2R1R2AKM1L電動(dòng)機(jī)停轉(zhuǎn)并勵(lì)直流電動(dòng)機(jī)能耗制動(dòng)原理第27頁(yè)/共41

10、頁(yè).反接制動(dòng)控制線路直流電動(dòng)機(jī)的反接制動(dòng)，通常是通過(guò)改變電樞兩端電壓極性或改變勵(lì)磁電流的方向來(lái)改變電磁轉(zhuǎn)矩的方向，形成制動(dòng)轉(zhuǎn)矩，從而迫使電動(dòng)機(jī)迅速停轉(zhuǎn)。第28頁(yè)/共41頁(yè)L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2L電路組成分析MKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM4KM5KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2第29頁(yè)/共41頁(yè)L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2L合上QFMKASB3SB1KM1K

11、M4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KM4KM5第30頁(yè)/共41頁(yè)L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2L按下SB1KM1線圈得電MKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KM4KM5第31頁(yè)/共41頁(yè)L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2LKM1觸頭動(dòng)作電動(dòng)機(jī)串聯(lián)全部電阻啟

12、動(dòng)MKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KM4KM5第32頁(yè)/共41頁(yè)L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KT1經(jīng)過(guò)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)KM4KM5第33頁(yè)/共41頁(yè)L+KVQFKM2KAKM1KM2K

13、M5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KV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)KM4KM5第34頁(yè)/共41頁(yè)L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KT2經(jīng)過(guò)整定時(shí)間KT2動(dòng)斷觸頭延時(shí)閉合,

14、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KM4KM5第35頁(yè)/共41頁(yè)L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2按下SB3KM1線圈失電KM4KM5第36頁(yè)/共41頁(yè)L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2

15、KM1KM2KM6KM7KM3KM6KM7RBR1R2KM1觸頭動(dòng)作KM4KM5第37頁(yè)/共41頁(yè)L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KM3線圈得電KM3觸頭動(dòng)作SB3動(dòng)合觸頭閉合KM2線圈得電KM4KM5第38頁(yè)/共41頁(yè)L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1