課題十并勵直流電動機的基本控制電路PPT課件VIP

1、 直流電動機具有啟動轉(zhuǎn)矩大、調(diào)速范圍廣、調(diào)速精度高、能夠?qū)崿F(xiàn)無級平滑調(diào)速以及可以頻繁啟動等一系列優(yōu)點。高精度切削機床 軋鋼機課題十 并勵直流電動機的基本控制線路第1頁/共41頁 造紙機 龍門刨床 外型圖 內(nèi)部接線圖 第2頁/共41頁一、啟動控制線路1.手動啟動控制線路BQ3直流電動機啟動變阻器外形圖 并勵直流電動機手動啟動控制電路圖 05-分段靜觸頭 6-電磁鐵 7- 弧形銅條第3頁/共41頁QFKT1KT1KM1KM2L+KM2LKM1SB2KA1KA2SB1KA2KA1IKM1KM1KM3R2KM12.電樞回路串電阻二級啟動控制線路IKM1KM1KM3R2KM1IKM1KM1KM3R2KM

2、1IKM1KM1KM3R2KM1IKM1KM1KM3R2KM1IMR1KM1KT2KM3KT2經(jīng)過整定時間KT2動斷觸頭延時閉合, KM3線圈得電KM3觸頭閉合切除全部電阻電動機全速運行KT22.電樞回路串電阻二級啟動控制線路第8頁/共41頁二、正反轉(zhuǎn)控制線路直流電動機實現(xiàn)正反轉(zhuǎn)有電樞繞組反接法和勵磁繞組反接法兩種。第9頁/共41頁KM3KM2KM2KM1SB2KM2KM3KM1KM2KAL+L-KTKAKM2SB3KM1SB1KTKM1KM1MR并勵直流電機正反轉(zhuǎn)控制線路IQFKM2KM1電路分析KM2KM1第10頁/共41頁KM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1K

3、TKM1KM1MRIKM2KM1正轉(zhuǎn)啟動:合上QF勵磁繞組得電勵磁線圈KA得電，動合觸頭閉合KT線圈得電，延時閉合瞬時斷開觸頭斷開KM2KM1L+L-QFKM3KM1KM2KAKT并勵直流電機正反轉(zhuǎn)控制線路第11頁/共41頁KM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRIKM2KM1按下SB1KM1線圈得電，KM1觸頭動作電動機串聯(lián) 電阻正轉(zhuǎn)起動KT線圈失電KM2KM1L+L-QFKM3KM1KM2KAKT并勵直流電機正反轉(zhuǎn)控制線路第12頁/共41頁KM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRIKM2KM1KT經(jīng)過整

4、定時間KT動斷觸頭延時閉合, KM3線圈得電KM3觸頭閉合切除電阻電動機全速運行KM2KM1L+L-QFKM3KM1KM2KAKT并勵直流電機正反轉(zhuǎn)控制線路第13頁/共41頁KM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRIKM2KM1停:按下SB3KM2KM1L+L-QFKM3KM1KM2KAKT并勵直流電機正反轉(zhuǎn)控制線路第14頁/共41頁KM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRIKM2KM1反轉(zhuǎn)啟動:合上QF勵磁繞組得電勵磁線圈KA得電，動合觸頭閉合KT線圈得電，延時閉合瞬時斷開觸頭斷開KM2KM1L+L-QF

5、KM3KM1KM2KAKT并勵直流電機正反轉(zhuǎn)控制線路第15頁/共41頁KM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRIKM2KM1按下SB2KM2線圈得電，KM2觸頭動作電動機串聯(lián) 電阻反轉(zhuǎn)起動KT線圈失電KM2KM1L+L-QFKM3KM1KM2KAKT并勵直流電機正反轉(zhuǎn)控制線路第16頁/共41頁KM3KM2KM2KM1SB2KM2KAKM2SB3KM1SB1KTKM1KM1MRIKM2KM1KT經(jīng)過整定時間KT動斷觸頭延時閉合, KM3線圈得電KM3觸頭閉合切除電阻電動機全速運行KM2KM1L+L-QFKM3KM1KM2KAKT并勵直流電機正反轉(zhuǎn)控制線

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

7、M3SB2KM1KM1RBKAMUKM4KM4KM3KT2R1R2AKM1L合上QF并勵直流電動機能耗制動原理第20頁/共41頁L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1 IKM3SB2KM1KM1RBKAMUKM4KM4KM3KT2R1R2AKM1L按下SB1并勵直流電動機能耗制動原理第21頁/共41頁L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1 IKM3SB2KM1KM1RBKAMUKM4KM4KM3KT2R1R2AKM1LKT1瞬時斷開延時閉合觸頭閉合并勵直流電動機能耗制動原理第22頁/共41頁

8、L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1 IKM3SB2KM1KM1RBKAMUKM4KM4KM3KT2R1R2AKM1LKT2瞬時斷開延時閉合觸頭閉合并勵直流電動機能耗制動原理第23頁/共41頁L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1 IKM3SB2KM1KM1RBKAMUKM4KM4KM3KT2R1R2AKM1L按下SB2并勵直流電動機能耗制動原理第24頁/共41頁L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1 IKM3SB2KM1KM1RBKAM

9、UKM4KM4KM3KT2R1R2AKM1LKV閉合KM2線圈得電KM2閉合能耗制動開始并勵直流電動機能耗制動原理第25頁/共41頁L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1 IKM3SB2KM1KM1RBKAMUKM4KM4KM3KT2R1R2AKM1L速度減小到一定值時,KV分斷并勵直流電動機能耗制動原理第26頁/共41頁L+KVQFKM2KAKA1VRKM1KM2KM1KM1KT1RBSB1KM1KT2KT1 IKM3SB2KM1KM1RBKAMUKM4KM4KM3KT2R1R2AKM1L電動機停轉(zhuǎn)并勵直流電動機能耗制動原理第27頁/共41

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

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

12、動MKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KM4KM5第32頁/共41頁L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KT1經(jīng)過整定時間KT1動斷觸頭延時閉合, KM6線圈得電KM6觸頭閉合電動機串聯(lián)R2繼續(xù)啟動KM4KM5第33頁/共41頁L+KVQFKM2KAKM1KM2K

13、M5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KV線圈升高到一定值KV觸頭閉合電動機串聯(lián)R2繼續(xù)啟動KM4KM5第34頁/共41頁L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KT2經(jīng)過整定時間KT2動斷觸頭延時閉合,

14、KM7線圈得電KM7觸頭閉合切除全部電阻電動機繼續(xù)啟動全速運行KM4KM5第35頁/共41頁L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2按下SB3KM1線圈失電KM4KM5第36頁/共41頁L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2

15、KM1KM2KM6KM7KM3KM6KM7RBR1R2KM1觸頭動作KM4KM5第37頁/共41頁L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1KM2KM6KM7KM3KM6KM7RBR1R2KM3線圈得電KM3觸頭動作SB3動合觸頭閉合KM2線圈得電KM4KM5第38頁/共41頁L+KVQFKM2KAKM1KM2KM5KM3KT1SB2KT2KT1 IKM3KM1KM4KT2LMKASB3SB1KM1KM4KM2KM5KM3KM2KM2KM1KVKM1KM1KM2KM1KM2KM1