大功率永磁電機供應

采用永磁(ci)(ci)體勵(li)(li)磁(ci)(ci)，減少了勵(li)(li)磁(ci)(ci)繞組(zu)、電(dian)(dian)刷、集電(dian)(dian)環(huan)結構，避免(mian)了傳統勵(li)(li)磁(ci)(ci)式發電(dian)(dian)機勵(li)(li)磁(ci)(ci)繞組(zu)易燒毀、斷線，電(dian)(dian)刷、集電(dian)(dian)環(huan)易磨損等(deng)故障，使用性(xing)能更可靠。

大功率永磁電機供應

轉(zhuan)(zhuan)子(zi)不存在(zai)(zai)勵磁繞組、電(dian)(dian)刷(shua)、集(ji)電(dian)(dian)環(huan)等損耗部件，效率得到(dao)明顯提(ti)高(gao)，功率因數可維(wei)持在(zai)(zai)0.95以(yi)上(shang)，在(zai)(zai)負(fu)載(zai)(zai)波(bo)動(dong)的情(qing)況下可維(wei)持較高(gao)力能水平，對于(yu)該裝備容量與負(fu)載(zai)(zai)匹配(pei)情(qing)況，綜合節電(dian)(dian)率可達15%以(yi)上(shang)。轉(zhuan)(zhuan)子(zi)結構緊(jin)湊靈活，可提(ti)高(gao)電(dian)(dian)機的轉(zhuan)(zhuan)子(zi)表面磁場(chang)強(qiang)度(du)(du)，進而提(ti)高(gao)轉(zhuan)(zhuan)矩密度(du)(du)，縮(suo)小(xiao)體積(ji)和重量。

有關(guan)特性

1、電壓(ya)的(de)調節(jie)

自動(dong)調(diao)(diao)節(jie)勵磁系統可以(yi)看成為(wei)一個以(yi)電(dian)(dian)(dian)(dian)壓(ya)為(wei)被調(diao)(diao)量(liang)的(de)(de)負(fu)反饋控(kong)制系統。無功(gong)負(fu)荷電(dian)(dian)(dian)(dian)流是(shi)(shi)造成發(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)端(duan)電(dian)(dian)(dian)(dian)壓(ya)下降(jiang)(jiang)的(de)(de)主要原因，當勵磁電(dian)(dian)(dian)(dian)流不變時，發(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)端(duan)電(dian)(dian)(dian)(dian)壓(ya)將(jiang)隨無功(gong)電(dian)(dian)(dian)(dian)流的(de)(de)增大而(er)降(jiang)(jiang)低。但是(shi)(shi)為(wei)了滿足用戶對電(dian)(dian)(dian)(dian)能質量(liang)的(de)(de)要求(qiu)，發(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)端(duan)電(dian)(dian)(dian)(dian)壓(ya)應基(ji)本保持不變，實現這(zhe)一要求(qiu)的(de)(de)辦法是(shi)(shi)隨無功(gong)電(dian)(dian)(dian)(dian)流的(de)(de)變化調(diao)(diao)節(jie)發(fa)(fa)電(dian)(dian)(dian)(dian)機(ji)(ji)的(de)(de)勵磁電(dian)(dian)(dian)(dian)流。

2、無(wu)功(gong)功(gong)率的調節：

發(fa)電(dian)機(ji)與(yu)系(xi)(xi)統并聯(lian)(lian)運(yun)行(xing)時(shi)，可(ke)以認為(wei)是(shi)(shi)與(yu)無限大容(rong)量(liang)電(dian)源的(de)(de)母線運(yun)行(xing)，要改(gai)變(bian)發(fa)電(dian)機(ji)勵(li)磁電(dian)流(liu)，感應電(dian)勢和定子電(dian)流(liu)也跟著變(bian)化，此時(shi)發(fa)電(dian)機(ji)的(de)(de)無功(gong)電(dian)流(liu)也跟著變(bian)化。當發(fa)電(dian)機(ji)與(yu)無限大容(rong)量(liang)系(xi)(xi)統并聯(lian)(lian)運(yun)行(xing)時(shi)，為(wei)了改(gai)變(bian)發(fa)電(dian)機(ji)的(de)(de)無功(gong)功(gong)率，必須調節發(fa)電(dian)機(ji)的(de)(de)勵(li)磁電(dian)流(liu)。此時(shi)改(gai)變(bian)的(de)(de)發(fa)電(dian)機(ji)勵(li)磁電(dian)流(liu)并不是(shi)(shi)通常所(suo)說(shuo)的(de)(de)“調壓”，而是(shi)(shi)只是(shi)(shi)改(gai)變(bian)了送(song)入(ru)系(xi)(xi)統的(de)(de)無功(gong)功(gong)率。

3、無功(gong)負荷的(de)分配：

并聯運行(xing)(xing)的發(fa)電(dian)機根(gen)據各自的額定容(rong)(rong)量，按比例進行(xing)(xing)無功(gong)(gong)電(dian)流(liu)的分(fen)配。大容(rong)(rong)量發(fa)電(dian)機應負擔較多無功(gong)(gong)負荷，而容(rong)(rong)量較小(xiao)的則負提供較少的無功(gong)(gong)負荷。為了實現無功(gong)(gong)負荷能(neng)自動分(fen)配，可以通過自動高壓調(diao)(diao)節的勵磁(ci)裝置，改變發(fa)電(dian)機勵磁(ci)電(dian)流(liu)維持(chi)其端(duan)電(dian)壓不變，還可對發(fa)電(dian)機電(dian)壓調(diao)(diao)節特性的傾斜度進行(xing)(xing)調(diao)(diao)整(zheng)，以實現并聯運行(xing)(xing)發(fa)電(dian)機無功(gong)(gong)負荷的合(he)理分(fen)配。