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(bo)電(dian)解電(dian)容(rong)的(de)好壞一般采用(yong)萬用(yong)表的(de)電(dian)阻檔進行測量．

方(fang)法為：將電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)兩管腳短(duan)路進行(xing)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，用萬(wan)(wan)用表(biao)(biao)(biao)(biao)(biao)(biao)(biao)的(de)(de)(de)黑(hei)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)筆(bi)(bi)(bi)接(jie)(jie)電(dian)(dian)(dian)(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)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)的(de)(de)(de)正極(ji)。紅表(biao)(biao)(biao)(biao)(biao)(biao)(biao)筆(bi)(bi)(bi)接(jie)(jie)負(fu)極(ji)(對指針(zhen)(zhen)(zhen)式萬(wan)(wan)用表(biao)(biao)(biao)(biao)(biao)(biao)(biao)，用數字式萬(wan)(wan)用表(biao)(biao)(biao)(biao)(biao)(biao)(biao)測(ce)量時(shi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)筆(bi)(bi)(bi)互(hu)調)，正常(chang)時(shi)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)針(zhen)(zhen)(zhen)應先向(xiang)(xiang)(xiang)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)小(xiao)的(de)(de)(de)方(fang)向(xiang)(xiang)(xiang)擺(bai)(bai)(bai)動，然(ran)(ran)后逐(zhu)(zhu)漸(jian)返回(hui)直至(zhi)無窮(qiong)大(da)(da)處(chu)。表(biao)(biao)(biao)(biao)(biao)(biao)(biao)針(zhen)(zhen)(zhen)的(de)(de)(de)擺(bai)(bai)(bai)動幅度(du)(du)越大(da)(da)或返回(hui)的(de)(de)(de)速(su)度(du)(du)越慢(man)(man)，說(shuo)(shuo)明(ming)(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)的(de)(de)(de)容(rong)(rong)(rong)(rong)(rong)量越大(da)(da)，反(fan)之則(ze)說(shuo)(shuo)明(ming)(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)的(de)(de)(de)容(rong)(rong)(rong)(rong)(rong)量越小(xiao)．如(ru)(ru)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)針(zhen)(zhen)(zhen)指在中(zhong)間某處(chu)不(bu)(bu)(bu)再變(bian)化(hua)，說(shuo)(shuo)明(ming)(ming)此(ci)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，如(ru)(ru)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)阻(zu)指示值很小(xiao)或為零，則(ze)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)明(ming)(ming)此(ci)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)已擊(ji)穿(chuan)短(duan)路．因萬(wan)(wan)用表(biao)(biao)(biao)(biao)(biao)(biao)(biao)使用的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓一(yi)(yi)般很低，所以在測(ce)量低耐壓的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)時(shi)比較準確(que)(que)。而當電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)的(de)(de)(de)耐壓較高時(shi)，盡管測(ce)量正常(chang)，但加上(shang)高壓時(shi)則(ze)有(you)可能(neng)發生漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)或擊(ji)穿(chuan)現象． 看電(dian)(dian)(dian)(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)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)容(rong)(rong)(rong)(rong)(rong)量大(da)(da)小(xiao)，通常(chang)選用萬(wan)(wan)用表(biao)(biao)(biao)(biao)(biao)(biao)(biao)的(de)(de)(de) R×10 、 R×100 、 R×1K 擋(dang)進行(xing)測(ce)試判(pan)斷。紅、黑(hei)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)筆(bi)(bi)(bi)分別(bie)接(jie)(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)負(fu)極(ji)（每次測(ce)試前，需將電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)放電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)），由表(biao)(biao)(biao)(biao)(biao)(biao)(biao)針(zhen)(zhen)(zhen)的(de)(de)(de)偏(pian)擺(bai)(bai)(bai)來判(pan)斷電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)質(zhi)量。若表(biao)(biao)(biao)(biao)(biao)(biao)(biao)針(zhen)(zhen)(zhen)迅速(su)向(xiang)(xiang)(xiang)右擺(bai)(bai)(bai)起(qi)(qi)，然(ran)(ran)后慢(man)(man)慢(man)(man)向(xiang)(xiang)(xiang)左退(tui)回(hui)原位(wei)，一(yi)(yi)般來說(shuo)(shuo)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)是好(hao)的(de)(de)(de)。如(ru)(ru)果表(biao)(biao)(biao)(biao)(biao)(biao)(biao)針(zhen)(zhen)(zhen)擺(bai)(bai)(bai)起(qi)(qi)后不(bu)(bu)(bu)再回(hui)轉，說(shuo)(shuo)明(ming)(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)已經擊(ji)穿(chuan)。如(ru)(ru)果表(biao)(biao)(biao)(biao)(biao)(biao)(biao)針(zhen)(zhen)(zhen)擺(bai)(bai)(bai)起(qi)(qi)后逐(zhu)(zhu)漸(jian)退(tui)回(hui)到某一(yi)(yi)位(wei)置(zhi)停(ting)(ting)位(wei)，則(ze)說(shuo)(shuo)明(ming)(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)已經漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)。如(ru)(ru)果表(biao)(biao)(biao)(biao)(biao)(biao)(biao)針(zhen)(zhen)(zhen)擺(bai)(bai)(bai)不(bu)(bu)(bu)起(qi)(qi)來，說(shuo)(shuo)明(ming)(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)解質(zhi)已經干涸推失去(qu)容(rong)(rong)(rong)(rong)(rong)量。 有(you)些漏(lou)電(dian)(dian)(dian)(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)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)，用上(shang)述方(fang)法不(bu)(bu)(bu)易準確(que)(que)判(pan)斷出好(hao)壞(huai)。當電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)耐壓值大(da)(da)于萬(wan)(wan)用表(biao)(biao)(biao)(biao)(biao)(biao)(biao)內電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)池(chi)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)壓值時(shi)，根據電(dian)(dian)(dian)(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)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)正向(xiang)(xiang)(xiang)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)時(shi)漏(lou)電(dian)(dian)(dian)(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)(dian)(dian)(dian)流小(xiao)，反(fan)向(xiang)(xiang)(xiang)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)時(shi)漏(lou)電(dian)(dian)(dian)(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)(dian)(dian)(dian)流大(da)(da)的(de)(de)(de)特(te)點，可采用 R×10K 擋(dang)，對電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)進行(xing)反(fan)向(xiang)(xiang)(xiang)充電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，觀察表(biao)(biao)(biao)(biao)(biao)(biao)(biao)針(zhen)(zhen)(zhen)停(ting)(ting)留(liu)(liu)處(chu)是否穩定（即反(fan)向(xiang)(xiang)(xiang)漏(lou)電(dian)(dian)(dian)(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)(dian)(dian)(dian)流是否恒(heng)定），由此(ci)判(pan)斷電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)質(zhi)量，準確(que)(que)度(du)(du)較高。黑(hei)表(biao)(biao)(biao)(biao)(biao)(biao)(biao)筆(bi)(bi)(bi)接(jie)(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)負(fu)極(ji)，紅表(biao)(biao)(biao)(biao)(biao)(biao)(biao)筆(bi)(bi)(bi)接(jie)(jie)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)正極(ji)，表(biao)(biao)(biao)(biao)(biao)(biao)(biao)針(zhen)(zhen)(zhen)迅速(su)擺(bai)(bai)(bai)起(qi)(qi)，然(ran)(ran)后逐(zhu)(zhu)漸(jian)退(tui)至(zhi)某處(chu)停(ting)(ting)留(liu)(liu)不(bu)(bu)(bu)動，則(ze)說(shuo)(shuo)明(ming)(ming)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)是好(hao)的(de)(de)(de)，凡(fan)是表(biao)(biao)(biao)(biao)(biao)(biao)(biao)針(zhen)(zhen)(zhen)在某一(yi)(yi)位(wei)置(zhi)停(ting)(ting)留(liu)(liu)不(bu)(bu)(bu)穩或停(ting)(ting)留(liu)(liu)后又逐(zhu)(zhu)漸(jian)慢(man)(man)慢(man)(man)向(xiang)(xiang)(xiang)右移動的(de)(de)(de)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)容(rong)(rong)(rong)(rong)(rong)器(qi)(qi)(qi)(qi)(qi)(qi)已經漏(lou)電(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)(dian)，不(bu)(bu)(bu)能(neng)繼續使用了。表(biao)(biao)(biao)(biao)(biao)(biao)(biao)針(zhen)(zhen)(zhen)一(yi)(yi)般停(ting)(ting)留(liu)(liu)并(bing)穩定在 50 － 200K 刻度(du)(du)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)壓分配不均(jun)當(dang)均(jun)壓電(dian)(dian)阻中有一個損(sun)壞(huai)時，互相(xiang)串聯的兩組電(dian)(dian)容器(qi)上的電(dian)(dian)壓分配變得(de)不均(jun)衡，則(ze)電(dian)(dian)壓較高的電(dian)(dian)容器(qi)容易損(sun)壞(huai)。

3、電(dian)(dian)容器(qi)漏電(dian)(dian)電(dian)(dian)流(liu)過大電(dian)(dian)解(jie)電(dian)(dian)容接入(ru)電(dian)(dian)路時，是存(cun)在漏電(dian)(dian)流(liu)的。正常情況下，漏電(dian)(dian)流(liu)是很小的。但如(ru)果由(you)于(yu)電(dian)(dian)容器(qi)老(lao)化，或(huo)由(you)于(yu)電(dian)(dian)容器(qi)本身的質量較差(cha)等原因，漏電(dian)(dian)流(liu)將增(zeng)大，使電(dian)(dian)解(jie)電(dian)(dian)容器(qi)將因嚴重發熱而損壞。

解答2：變頻器噪音(yin)就(jiu)這(zhe)么(me)幾種： 1. 功率器件高(gao)頻(pin)開關會產生(sheng)噪音(yin)，但這(zhe)個聲音(yin)很小。

2. 風扇會產生噪音;

3. 如果存在dudt電感，則電感的聲(sheng)音會很(hen)大

4. 整(zheng)流側的電感，如果接的是LCL 采用PWM整(zheng)流方式，則電感聲音會比較大.

解決方式可(ke)以(yi)有：

1、變(bian)頻(pin)器的(de)載波(bo)頻(pin)率。將變(bian)頻(pin)器的(de)載波(bo)頻(pin)率提高，可(ke)有效的(de)降低電機噪音(yin)，但變頻(pin)器(qi)發熱量會(hui)增大(da)，輸出電流會(hui)降(jiang)低。

2、速度(du)環、電流環比例(li)和積分增益。