全自動繞線機安全防護裝置系統基于JG系列環形全自動繞線機設計，通過實地考(kao)察以及對操作人(ren)(ren)員交(jiao)談后(hou)發現(xian)：工人(ren)(ren)操作此系列環形全自動繞線(xian)機時是將(jiang)未(wei)繞線(xian)鐵芯放入3個(ge)滾動輪中(zhong)，具體操作是打開儲(chu)線(xian)環本體燕(yan)尾鎖條，將(jiang)儲(chu)線(xian)環開口(kou)活(huo)動段分(fen)開，讓(rang)額外繞線(xian)鐵芯中(zhong)心空位穿越繞線(xian)環開口(kou)部分(fen)；然后(hou)鎖上鎖條，踩下腳踏開關，使儲(chu)線(xian)環轉動，其最高轉速可達700r/min，中(zhong)途需用手將(jiang)繞線(xian)鐵芯中(zhong)的線(xian)頭拔(ba)到另一邊去(qu)。

     由于全自(zi)動繞線機轉速(su)過快(kuai)，工(gong)人(ren)需要(yao)很快(kuai)的速(su)度(du)而手鏈的動作(zuo)去操作(zuo)，這時就出現(xian)了(le)兩種傷(shang)指現(xian)象：

①已斷漆包線斷頭會插入手(shou)指，造成手(shou)指受傷；

②高速運轉的(de)銅(tong)絲會壓到手指，輕者手指皮外傷，重者壓斷(duan)手指。

     交(jiao)流(liu)(liu)(liu)(liu)變(bian)(bian)頻(pin)(pin)器(qi)的(de)(de)(de)工作原理：變(bian)(bian)頻(pin)(pin)技(ji)術是通(tong)過(guo)變(bian)(bian)頻(pin)(pin)器(qi)改(gai)變(bian)(bian)電(dian)源頻(pin)(pin)率(lv)，從(cong)(cong)而(er)改(gai)變(bian)(bian)交(jiao)流(liu)(liu)(liu)(liu)異步(bu)電(dian)動機的(de)(de)(de)轉速的(de)(de)(de)一種(zhong)技(ji)術。通(tong)過(guo)變(bian)(bian)頻(pin)(pin)器(qi)先進行(xing)交(jiao)流(liu)(liu)(liu)(liu)到(dao)直流(liu)(liu)(liu)(liu)的(de)(de)(de)變(bian)(bian)換，再通(tong)過(guo)變(bian)(bian)頻(pin)(pin)器(qi)進行(xing)直流(liu)(liu)(liu)(liu)到(dao)交(jiao)流(liu)(liu)(liu)(liu)的(de)(de)(de)變(bian)(bian)換，從(cong)(cong)而(er)控(kong)制(zhi)交(jiao)流(liu)(liu)(liu)(liu)電(dian)機的(de)(de)(de)轉速。而(er)全(quan)自(zi)(zi)動繞(rao)線機自(zi)(zi)動保護裝置項(xiang)目的(de)(de)(de)系列環形全(quan)自(zi)(zi)動繞(rao)線機對變(bian)(bian)頻(pin)(pin)器(qi)的(de)(de)(de)控(kong)制(zhi)是通(tong)過(guo)控(kong)制(zhi)輸(shu)(shu)入變(bian)(bian)頻(pin)(pin)器(qi)的(de)(de)(de)模擬電(dian)壓，進而(er)控(kong)制(zhi)變(bian)(bian)頻(pin)(pin)器(qi)輸(shu)(shu)出電(dian)源的(de)(de)(de)頻(pin)(pin)率(lv)，使(shi)交(jiao)流(liu)(liu)(liu)(liu)電(dian)機的(de)(de)(de)轉速跟隨輸(shu)(shu)出電(dian)源頻(pin)(pin)率(lv)的(de)(de)(de)變(bian)(bian)化(hua)而(er)變(bian)(bian)化(hua)。

     而三相(xiang)異步電(dian)(dian)(dian)(dian)動(dong)機轉速由點(dian)頻(pin)率、電(dian)(dian)(dian)(dian)動(dong)機的(de)(de)(de)極對數(shu)及轉差率決定(ding)。異步電(dian)(dian)(dian)(dian)動(dong)機的(de)(de)(de)轉矩是電(dian)(dian)(dian)(dian)機的(de)(de)(de)磁(ci)通與轉子內流過電(dian)(dian)(dian)(dian)流之間相(xiang)互作用(yong)而產生的(de)(de)(de)，在定(ding)頻(pin)率下，如(ru)果電(dian)(dian)(dian)(dian)壓(ya)一(yi)定(ding)而只(zhi)降(jiang)低頻(pin)率，那么磁(ci)通就過大，磁(ci)回路(lu)飽和(he)，嚴重(zhong)時將燒毀電(dian)(dian)(dian)(dian)機。因(yin)此，頻(pin)率與電(dian)(dian)(dian)(dian)壓(ya)要成(cheng)比例地改(gai)(gai)(gai)變(bian)(bian)，即改(gai)(gai)(gai)變(bian)(bian)頻(pin)率的(de)(de)(de)同(tong)時控制變(bian)(bian)頻(pin)器輸出電(dian)(dian)(dian)(dian)壓(ya)，使電(dian)(dian)(dian)(dian)動(dong)機的(de)(de)(de)磁(ci)通保持一(yi)定(ding)，避免弱磁(ci)和(he)磁(ci)飽和(he)現象的(de)(de)(de)產生。由于(yu)通用(yong)變(bian)(bian)頻(pin)器一(yi)般(ban)采用(yong)V/f控制，即變(bian)(bian)壓(ya)變(bian)(bian)頻(pin)方(fang)式(shi)調(diao)速，改(gai)(gai)(gai)變(bian)(bian)頻(pin)率和(he)電(dian)(dian)(dian)(dian)壓(ya)使最優的(de)(de)(de)電(dian)(dian)(dian)(dian)機控制方(fang)法(fa)。因(yin)此選擇了變(bian)(bian)頻(pin)調(diao)速方(fang)法(fa)，變(bian)(bian)頻(pin)調(diao)速是改(gai)(gai)(gai)變(bian)(bian)電(dian)(dian)(dian)(dian)動(dong)機定(ding)子電(dian)(dian)(dian)(dian)源的(de)(de)(de)頻(pin)率，從而改(gai)(gai)(gai)變(bian)(bian)其同(tong)步轉速的(de)(de)(de)調(diao)速方(fang)法(fa)。其特點(dian)：

①效率高，調速過程中沒有(you)附加損耗；

②應用(yong)范圍廣，可用(yong)于(yu)籠型(xing)異步電動機；

③調速范圍大、特性硬、精度高(gao)。