工業洗衣機廠家分享(xiang)滾(gun)筒(tong)洗(xi)衣機串激式電(dian)機控(kong)(kong)(kong)(kong)制(zhi)電(dian)路原理(li)與(yu)常(chang)見故障檢修！當電(dian)機洗(xi)滌正轉(zhuan)時，從(cong)(cong)CPU的(de)(de)(de)腳(jiao)輸出(chu)低(di)電(dian)平送到IC6（ULN2003）的(de)(de)(de)腳(jiao)，經反相后(hou)從(cong)(cong)腳(jiao)輸出(chu)高電(dian)平，啟動瞬間(jian)CPU檢測(ce)過零(ling)信號，產生一(yi)個上升沿的(de)(de)(de)觸(chu)發脈沖，可控(kong)(kong)(kong)(kong)硅控(kong)(kong)(kong)(kong)制(zhi)腳(jiao)的(de)(de)(de)脈寬調制(zhi)信號（PWM）對轉(zhuan)速(su)進行控(kong)(kong)(kong)(kong)制(zhi)。腳(jiao)輸出(chu)信號經R61接至(zhi)雙向可控(kong)(kong)(kong)(kong)硅的(de)(de)(de)控(kong)(kong)(kong)(kong)制(zhi)腳(jiao),可控(kong)(kong)(kong)(kong)硅觸(chu)發導(dao)通(tong)(tong)，此(ci)時電(dian)源(yuan)L（火線）經電(dian)刷、轉(zhuan)子、電(dian)刷后(hou)接到繼(ji)電(dian)器(qi)(qi)控(kong)(kong)(kong)(kong)制(zhi)線路，JK4繼(ji)電(dian)器(qi)(qi)得電(dian)，觸(chu)頭1-2若開，1-3接通(tong)(tong)，電(dian)流從(cong)(cong)定子繞組1端流入,2端流出(chu)，經繼(ji)電(dian)器(qi)(qi)JK5的(de)(de)(de)2-1觸(chu)頭接入繼(ji)電(dian)器(qi)(qi)JK3, JK3得電(dian)，觸(chu)頭1-2斷開，1-3接通(tong)(tong)，電(dian)流進入可控(kong)(kong)(kong)(kong)硅的(de)(de)(de)T2 ji，由于(yu)此(ci)時可控(kong)(kong)(kong)(kong)硅TR4已觸(chu)發導(dao)通(tong)(tong)工作(zuo),T2與(yu)T1ji導(dao)通(tong)(tong)接至(zhi)電(dian)源(yuan)零(ling)線（N）,所以電(dian)機得電(dian)正轉(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(jing)反(fan)(fan)相后從(cong)(cong)腳(jiao)(jiao)輸出高電(dian)(dian)(dian)平，啟(qi)動瞬間(jian)CPU檢(jian)測過零(ling)信號，產生一個上升(sheng)沿的(de)觸(chu)發(fa)脈沖，其轉(zhuan)(zhuan)速是受(shou)到可(ke)(ke)控(kong)(kong)(kong)硅(gui)控(kong)(kong)(kong)制(zhi)腳(jiao)(jiao)的(de)脈寬調(diao)制(zhi)信號（PWM）實現(xian)調(diao)速。接(jie)R61電(dian)(dian)(dian)阻后直接(jie)連(lian)接(jie)雙向可(ke)(ke)控(kong)(kong)(kong)硅(gui)的(de)控(kong)(kong)(kong)制(zhi)腳(jiao)(jiao)，可(ke)(ke)控(kong)(kong)(kong)硅(gui)觸(chu)發(fa)導通，此時(shi)電(dian)(dian)(dian)源L（火線(xian)）經(jing)電(dian)(dian)(dian)刷(shua)、轉(zhuan)(zhuan)子(zi)、電(dian)(dian)(dian)刷(shua)后接(jie)到繼電(dian)(dian)(dian)器(qi)控(kong)(kong)(kong)制(zhi)線(xian)路，電(dian)(dian)(dian)流(liu)流(liu)經(jing)JK3繼電(dian)(dian)(dian)器(qi)的(de)2-1觸(chu)頭后進入(ru)JK5繼電(dian)(dian)(dian)器(qi)的(de)1-2端，電(dian)(dian)(dian)流(liu)從(cong)(cong)定子(zi)繞組的(de)2端流(liu)入(ru)，1端流(liu)出后接(jie)到JK4繼電(dian)(dian)(dian)器(qi)的(de)1-2端,再接(jie)到可(ke)(ke)控(kong)(kong)(kong)硅(gui)TR4的(de)T2ji,此時(shi)由于可(ke)(ke)控(kong)(kong)(kong)硅(gui)處于導通的(de)工作(zuo)狀態,T1ji直接(jie)接(jie)到零(ling)線(xian)N端，電(dian)(dian)(dian)機得電(dian)(dian)(dian)反(fan)(fan)轉(zhuan)(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對電(dian)機的轉速同步與(yu)控(kong)制。目(mu)前常(chang)用(yong)的過(guo)零(ling)檢測(ce)電(dian)路有以下幾(ji)種方式:變壓(ya)器(qi)后(hou)取信號（二ji管(guan)及(ji)三ji管(guan)）、變壓(ya)器(qi)前取信號（三ji管(guan)非隔離及(ji)光耦隔離）和非隔離過(guo)零(ling)檢測(ce)電(dian)路。