工業洗衣機廠家分(fen)享滾筒洗衣機串激式電(dian)(dian)機控(kong)(kong)(kong)制(zhi)(zhi)電(dian)(dian)路原理與(yu)常見故障(zhang)檢修(xiu)！當電(dian)(dian)機洗滌正轉(zhuan)(zhuan)時(shi)，從(cong)CPU的腳(jiao)輸(shu)出(chu)(chu)低電(dian)(dian)平送到(dao)IC6（ULN2003）的腳(jiao)，經反(fan)相后從(cong)腳(jiao)輸(shu)出(chu)(chu)高電(dian)(dian)平，啟動瞬間(jian)CPU檢測過零(ling)信(xin)號，產生一個上(shang)升沿的觸發(fa)脈沖，可控(kong)(kong)(kong)硅(gui)(gui)控(kong)(kong)(kong)制(zhi)(zhi)腳(jiao)的脈寬調制(zhi)(zhi)信(xin)號（PWM）對轉(zhuan)(zhuan)速進(jin)行控(kong)(kong)(kong)制(zhi)(zhi)。腳(jiao)輸(shu)出(chu)(chu)信(xin)號經R61接(jie)(jie)至(zhi)雙向可控(kong)(kong)(kong)硅(gui)(gui)的控(kong)(kong)(kong)制(zhi)(zhi)腳(jiao),可控(kong)(kong)(kong)硅(gui)(gui)觸發(fa)導通，此時(shi)電(dian)(dian)源L（火(huo)線(xian)）經電(dian)(dian)刷(shua)、轉(zhuan)(zhuan)子(zi)、電(dian)(dian)刷(shua)后接(jie)(jie)到(dao)繼(ji)電(dian)(dian)器控(kong)(kong)(kong)制(zhi)(zhi)線(xian)路，JK4繼(ji)電(dian)(dian)器得電(dian)(dian)，觸頭(tou)(tou)1-2若開(kai)，1-3接(jie)(jie)通，電(dian)(dian)流(liu)從(cong)定子(zi)繞組(zu)1端流(liu)入,2端流(liu)出(chu)(chu)，經繼(ji)電(dian)(dian)器JK5的2-1觸頭(tou)(tou)接(jie)(jie)入繼(ji)電(dian)(dian)器JK3, JK3得電(dian)(dian)，觸頭(tou)(tou)1-2斷開(kai)，1-3接(jie)(jie)通，電(dian)(dian)流(liu)進(jin)入可控(kong)(kong)(kong)硅(gui)(gui)的T2 ji，由于(yu)此時(shi)可控(kong)(kong)(kong)硅(gui)(gui)TR4已(yi)觸發(fa)導通工作,T2與(yu)T1ji導通接(jie)(jie)至(zhi)電(dian)(dian)源零(ling)線(xian)（N）,所以電(dian)(dian)機得電(dian)(dian)正轉(zhuan)(zhuan)。

當電機洗滌反轉時，從CPU的腳輸出低電平送到IC6（ULN2003）的腳，工業洗衣機廠家電話經反相(xiang)后(hou)從腳輸出高電(dian)(dian)平，啟(qi)動(dong)瞬間CPU檢測過零(ling)信號，產生(sheng)一個上升沿(yan)的(de)(de)觸發脈沖，其轉(zhuan)速(su)是受(shou)到(dao)可控(kong)硅(gui)(gui)(gui)控(kong)制腳的(de)(de)脈寬(kuan)調制信號（PWM）實(shi)現調速(su)。接(jie)(jie)(jie)R61電(dian)(dian)阻后(hou)直接(jie)(jie)(jie)連接(jie)(jie)(jie)雙(shuang)向可控(kong)硅(gui)(gui)(gui)的(de)(de)控(kong)制腳，可控(kong)硅(gui)(gui)(gui)觸發導(dao)通，此(ci)時(shi)電(dian)(dian)源L（火線(xian)）經電(dian)(dian)刷、轉(zhuan)子(zi)、電(dian)(dian)刷后(hou)接(jie)(jie)(jie)到(dao)繼電(dian)(dian)器控(kong)制線(xian)路(lu)，電(dian)(dian)流流經JK3繼電(dian)(dian)器的(de)(de)2-1觸頭(tou)后(hou)進入JK5繼電(dian)(dian)器的(de)(de)1-2端(duan)(duan)，電(dian)(dian)流從定子(zi)繞組的(de)(de)2端(duan)(duan)流入，1端(duan)(duan)流出后(hou)接(jie)(jie)(jie)到(dao)JK4繼電(dian)(dian)器的(de)(de)1-2端(duan)(duan),再接(jie)(jie)(jie)到(dao)可控(kong)硅(gui)(gui)(gui)TR4的(de)(de)T2ji,此(ci)時(shi)由于可控(kong)硅(gui)(gui)(gui)處于導(dao)通的(de)(de)工(gong)作狀態,T1ji直接(jie)(jie)(jie)接(jie)(jie)(jie)到(dao)零(ling)線(xian)N端(duan)(duan)，電(dian)(dian)機得(de)電(dian)(dian)反轉(zhuan)。

過零檢測電路：過零檢測電路是指為CPU提供一個標準的外部時鐘源,準確反映市電正弦波的過零情況。家用電器控制器中在一些可控硅控制的轉速類電機的場合一般有過零檢測電路，工業洗衣機廠家哪家好能實現(xian)對(dui)電機的轉速同(tong)步與(yu)控制。目前常用(yong)的過(guo)零(ling)檢測(ce)電路有以下幾(ji)種方式:變(bian)壓(ya)(ya)器(qi)(qi)后取信(xin)號(hao)（二ji管(guan)(guan)及三(san)ji管(guan)(guan)）、變(bian)壓(ya)(ya)器(qi)(qi)前取信(xin)號(hao)（三(san)ji管(guan)(guan)非(fei)隔(ge)離(li)及光耦(ou)隔(ge)離(li)）和非(fei)隔(ge)離(li)過(guo)零(ling)檢測(ce)電路。