變頻器驅動電機會出現噪音，哪些原因可能導致噪音的發生？

解答1：判斷濾波電解電容的(de)好(hao)壞一般采用萬(wan)用表(biao)的(de)電阻(zu)檔進行測(ce)量．

方(fang)法為：將(jiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)兩管腳短路(lu)進行(xing)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，用(yong)(yong)(yong)(yong)萬(wan)用(yong)(yong)(yong)(yong)表(biao)(biao)(biao)(biao)的(de)(de)(de)黑(hei)表(biao)(biao)(biao)(biao)筆(bi)(bi)接電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)的(de)(de)(de)正極。紅(hong)表(biao)(biao)(biao)(biao)筆(bi)(bi)接負(fu)極(對指(zhi)(zhi)針(zhen)(zhen)式萬(wan)用(yong)(yong)(yong)(yong)表(biao)(biao)(biao)(biao)，用(yong)(yong)(yong)(yong)數字式萬(wan)用(yong)(yong)(yong)(yong)表(biao)(biao)(biao)(biao)測量(liang)(liang)(liang)(liang)時(shi)(shi)(shi)表(biao)(biao)(biao)(biao)筆(bi)(bi)互(hu)調)，正常(chang)時(shi)(shi)(shi)表(biao)(biao)(biao)(biao)針(zhen)(zhen)應先(xian)向(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻小(xiao)的(de)(de)(de)方(fang)向(xiang)擺(bai)動(dong)，然(ran)后(hou)(hou)(hou)逐(zhu)(zhu)(zhu)漸返回直(zhi)至(zhi)無(wu)窮大(da)處。表(biao)(biao)(biao)(biao)針(zhen)(zhen)的(de)(de)(de)擺(bai)動(dong)幅度越大(da)或返回的(de)(de)(de)速度越慢，說(shuo)(shuo)明電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)的(de)(de)(de)容(rong)(rong)(rong)(rong)(rong)(rong)量(liang)(liang)(liang)(liang)越大(da)，反(fan)之則(ze)說(shuo)(shuo)明電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)的(de)(de)(de)容(rong)(rong)(rong)(rong)(rong)(rong)量(liang)(liang)(liang)(liang)越小(xiao)．如(ru)(ru)(ru)表(biao)(biao)(biao)(biao)針(zhen)(zhen)指(zhi)(zhi)在(zai)中間某處不再變化，說(shuo)(shuo)明此電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，如(ru)(ru)(ru)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻指(zhi)(zhi)示值很(hen)小(xiao)或為零，則(ze)表(biao)(biao)(biao)(biao)明此電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)已(yi)(yi)擊穿(chuan)短路(lu)．因(yin)萬(wan)用(yong)(yong)(yong)(yong)表(biao)(biao)(biao)(biao)使用(yong)(yong)(yong)(yong)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)一(yi)(yi)般很(hen)低，所以在(zai)測量(liang)(liang)(liang)(liang)低耐壓(ya)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)時(shi)(shi)(shi)比較準(zhun)確。而當電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)的(de)(de)(de)耐壓(ya)較高時(shi)(shi)(shi)，盡(jin)管測量(liang)(liang)(liang)(liang)正常(chang)，但加上高壓(ya)時(shi)(shi)(shi)則(ze)有可能(neng)發生(sheng)漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)或擊穿(chuan)現象． 看電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)容(rong)(rong)(rong)(rong)(rong)(rong)量(liang)(liang)(liang)(liang)大(da)小(xiao)，通常(chang)選用(yong)(yong)(yong)(yong)萬(wan)用(yong)(yong)(yong)(yong)表(biao)(biao)(biao)(biao)的(de)(de)(de) R×10 、 R×100 、 R×1K 擋(dang)進行(xing)測試(shi)判(pan)斷(duan)。紅(hong)、黑(hei)表(biao)(biao)(biao)(biao)筆(bi)(bi)分別接電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)的(de)(de)(de)負(fu)極（每次(ci)測試(shi)前，需將(jiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)），由表(biao)(biao)(biao)(biao)針(zhen)(zhen)的(de)(de)(de)偏擺(bai)來(lai)判(pan)斷(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)質(zhi)量(liang)(liang)(liang)(liang)。若表(biao)(biao)(biao)(biao)針(zhen)(zhen)迅速向(xiang)右擺(bai)起(qi)(qi)，然(ran)后(hou)(hou)(hou)慢慢向(xiang)左退回原位(wei)，一(yi)(yi)般來(lai)說(shuo)(shuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)是好的(de)(de)(de)。如(ru)(ru)(ru)果表(biao)(biao)(biao)(biao)針(zhen)(zhen)擺(bai)起(qi)(qi)后(hou)(hou)(hou)不再回轉(zhuan)，說(shuo)(shuo)明電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)已(yi)(yi)經擊穿(chuan)。如(ru)(ru)(ru)果表(biao)(biao)(biao)(biao)針(zhen)(zhen)擺(bai)起(qi)(qi)后(hou)(hou)(hou)逐(zhu)(zhu)(zhu)漸退回到某一(yi)(yi)位(wei)置(zhi)停位(wei)，則(ze)說(shuo)(shuo)明電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)已(yi)(yi)經漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)。如(ru)(ru)(ru)果表(biao)(biao)(biao)(biao)針(zhen)(zhen)擺(bai)不起(qi)(qi)來(lai)，說(shuo)(shuo)明電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解質(zhi)已(yi)(yi)經干涸推失去容(rong)(rong)(rong)(rong)(rong)(rong)量(liang)(liang)(liang)(liang)。 有些漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)，用(yong)(yong)(yong)(yong)上述(shu)方(fang)法不易準(zhun)確判(pan)斷(duan)出好壞。當電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)的(de)(de)(de)耐壓(ya)值大(da)于萬(wan)用(yong)(yong)(yong)(yong)表(biao)(biao)(biao)(biao)內電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓(ya)值時(shi)(shi)(shi)，根據電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)正向(xiang)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)時(shi)(shi)(shi)漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流小(xiao)，反(fan)向(xiang)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)時(shi)(shi)(shi)漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流大(da)的(de)(de)(de)特(te)點(dian)，可采用(yong)(yong)(yong)(yong) R×10K 擋(dang)，對電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)進行(xing)反(fan)向(xiang)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，觀察表(biao)(biao)(biao)(biao)針(zhen)(zhen)停留(liu)處是否(fou)穩定（即反(fan)向(xiang)漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)流是否(fou)恒定），由此判(pan)斷(duan)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)質(zhi)量(liang)(liang)(liang)(liang)，準(zhun)確度較高。黑(hei)表(biao)(biao)(biao)(biao)筆(bi)(bi)接電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)的(de)(de)(de)負(fu)極，紅(hong)表(biao)(biao)(biao)(biao)筆(bi)(bi)接電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)的(de)(de)(de)正極，表(biao)(biao)(biao)(biao)針(zhen)(zhen)迅速擺(bai)起(qi)(qi)，然(ran)后(hou)(hou)(hou)逐(zhu)(zhu)(zhu)漸退至(zhi)某處停留(liu)不動(dong)，則(ze)說(shuo)(shuo)明電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)是好的(de)(de)(de)，凡是表(biao)(biao)(biao)(biao)針(zhen)(zhen)在(zai)某一(yi)(yi)位(wei)置(zhi)停留(liu)不穩或停留(liu)后(hou)(hou)(hou)又(you)逐(zhu)(zhu)(zhu)漸慢慢向(xiang)右移動(dong)的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)已(yi)(yi)經漏(lou)(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，不能(neng)繼續使用(yong)(yong)(yong)(yong)了。表(biao)(biao)(biao)(biao)針(zhen)(zhen)一(yi)(yi)般停留(liu)并穩定在(zai) 50 － 200K 刻度范圍內。

通常電解電容器損壞有以下原因： 1、整流管損壞 當整流橋中有一個整流管被擊穿時，整流后的電壓將出現交流成分，濾波電容器上出現反向電壓，濾波電容器因此而損壞。

2、電(dian)(dian)壓(ya)分配不均當(dang)均壓(ya)電(dian)(dian)阻中有(you)一個損(sun)壞時，互相串聯(lian)的(de)兩組電(dian)(dian)容器上(shang)的(de)電(dian)(dian)壓(ya)分配變得不均衡(heng)，則電(dian)(dian)壓(ya)較高的(de)電(dian)(dian)容器容易損(sun)壞。

3、電(dian)(dian)(dian)(dian)(dian)(dian)容器漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)過大電(dian)(dian)(dian)(dian)(dian)(dian)解電(dian)(dian)(dian)(dian)(dian)(dian)容接入電(dian)(dian)(dian)(dian)(dian)(dian)路時(shi)，是存在漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)的。正常情況(kuang)下，漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)是很(hen)小的。但如果由于(yu)電(dian)(dian)(dian)(dian)(dian)(dian)容器老化，或由于(yu)電(dian)(dian)(dian)(dian)(dian)(dian)容器本身(shen)的質(zhi)量較(jiao)差等原因，漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)流(liu)(liu)將增大，使電(dian)(dian)(dian)(dian)(dian)(dian)解電(dian)(dian)(dian)(dian)(dian)(dian)容器將因嚴重發熱而損壞。

解答2：變頻器(qi)噪(zao)音(yin)就這(zhe)么幾(ji)種： 1. 功率器件高(gao)頻開關會產生(sheng)噪(zao)音(yin)，但這(zhe)個聲音(yin)很小。

2. 風扇會產生噪音;

3. 如果存在dudt電(dian)感，則電(dian)感的聲音會(hui)很大

4. 整流側的電(dian)感，如果接(jie)的是(shi)LCL 采用PWM整流方式，則電(dian)感聲音(yin)會比較大.

解決方式可以有(you)：

1、變頻器(qi)的載波頻率。將變頻器(qi)的載波頻率提高，可有效(xiao)的降低電機噪音，但(dan)變頻器發(fa)熱量會增大，輸出電流會降低。

2、速度環(huan)、電流環(huan)比(bi)例和積分增(zeng)益。