從無刷電機的工作原理來看，是(shi)依靠改變(bian)輸入到無(wu)刷電(dian)(dian)機定(ding)子(zi)線圈上(shang)的(de)(de)電(dian)(dian)流波交變(bian)頻(pin)率和(he)波形，在繞組線圈周圍形成一個繞電(dian)(dian)機幾何(he)軸心(xin)旋轉的(de)(de)磁(ci)場，這個磁(ci)場驅動(dong)轉子(zi)上(shang)的(de)(de)永磁(ci)磁(ci)鋼轉動(dong)，因此電(dian)(dian)機就能(neng)轉了。那么在無(wu)刷電(dian)(dian)機轉動(dong)的(de)(de)過程中，驅動(dong)電(dian)(dian)路(lu)和(he)控(kong)制(zhi)電(dian)(dian)路(lu)是(shi)如何(he)工作的(de)(de)呢(ni)？下(xia)面(mian)由博英特技術人員為大家介紹：
1、驅動電路
在功(gong)(gong)率(lv)較大(da)的無(wu)刷電(dian)(dian)機中，驅動(dong)(dong)電(dian)(dian)路(lu)(lu)和控制(zhi)電(dian)(dian)路(lu)(lu)可(ke)各自成為(wei)一(yi)體(ti)(ti)。驅動(dong)(dong)電(dian)(dian)路(lu)(lu)輸(shu)出電(dian)(dian)功(gong)(gong)率(lv)，驅動(dong)(dong)電(dian)(dian)動(dong)(dong)機的電(dian)(dian)樞繞組，并受(shou)控于控制(zhi)電(dian)(dian)路(lu)(lu)。目前，無(wu)刷電(dian)(dian)機驅動(dong)(dong)電(dian)(dian)路(lu)(lu)已從線性放大(da)狀態轉成脈寬調制(zhi)的開關狀態，相(xiang)應電(dian)(dian)路(lu)(lu)組成也從晶(jing)體(ti)(ti)管(guan)(guan)分立電(dian)(dian)路(lu)(lu)轉成模塊化集成電(dian)(dian)路(lu)(lu)。模塊化集成電(dian)(dian)路(lu)(lu)有功(gong)(gong)率(lv)雙極(ji)晶(jing)體(ti)(ti)管(guan)(guan)、功(gong)(gong)率(lv)場效(xiao)(xiao)應管(guan)(guan)和隔(ge)離柵場效(xiao)(xiao)應雙極(ji)晶(jing)體(ti)(ti)管(guan)(guan)等組成形式。
2、控制電路
控(kong)制(zhi)(zhi)(zhi)電(dian)(dian)(dian)路是(shi)控(kong)制(zhi)(zhi)(zhi)無刷電(dian)(dian)(dian)機的轉速、轉向、電(dian)(dian)(dian)流(或(huo)轉矩)以及保護電(dian)(dian)(dian)機的過(guo)(guo)(guo)(guo)流、過(guo)(guo)(guo)(guo)壓(ya)、過(guo)(guo)(guo)(guo)熱(re)等。從發展來看，電(dian)(dian)(dian)機的參數(shu)應轉換(huan)成數(shu)字(zi)量(liang)，通(tong)過(guo)(guo)(guo)(guo)數(shu)字(zi)式控(kong)制(zhi)(zhi)(zhi)電(dian)(dian)(dian)路來控(kong)制(zhi)(zhi)(zhi)電(dian)(dian)(dian)機。當前，控(kong)制(zhi)(zhi)(zhi)電(dian)(dian)(dian)路有(you)專(zhuan)用集成電(dian)(dian)(dian)路、微處(chu)(chu)理(li)器和數(shu)字(zi)信號處(chu)(chu)理(li)器等三種組成方式。在對電(dian)(dian)(dian)機控(kong)制(zhi)(zhi)(zhi)要求不高的場(chang)合，專(zhuan)用集成電(dian)(dian)(dian)路組成控(kong)制(zhi)(zhi)(zhi)電(dian)(dian)(dian)路是(shi)簡單實用的方式。
以上(shang)就是無(wu)刷電(dian)(dian)機(ji)驅動(dong)電(dian)(dian)路和控(kong)(kong)制電(dian)(dian)路的介(jie)紹了，目前無(wu)刷電(dian)(dian)機(ji)通常被使用在控(kong)(kong)制要求(qiu)比較(jiao)高，轉(zhuan)(zhuan)速比較(jiao)高的設備(bei)上(shang)，如(ru)航(hang)模(mo)，精密(mi)儀器儀表等(deng)對電(dian)(dian)機(ji)轉(zhuan)(zhuan)速控(kong)(kong)制嚴格，轉(zhuan)(zhuan)速達到很高的設備(bei)上(shang)。
