永磁電機概述

永磁電機是(shi)一種矩形脈沖波(bo)，電流正弦(xian)波(bo)電流，混合式永磁電機的形式。

采用永磁(ci)(ci)(ci)體勵磁(ci)(ci)(ci)，減(jian)少(shao)了(le)(le)勵磁(ci)(ci)(ci)繞(rao)組、電(dian)刷、集(ji)電(dian)環(huan)結構，避免了(le)(le)傳統勵磁(ci)(ci)(ci)式發電(dian)機勵磁(ci)(ci)(ci)繞(rao)組易燒(shao)毀、斷(duan)線，電(dian)刷、集(ji)電(dian)環(huan)易磨損(sun)等故障，使(shi)用性能更可靠。

轉(zhuan)子不(bu)存在(zai)(zai)勵磁繞組、電刷(shua)、集(ji)電環等(deng)損耗(hao)部件，效率(lv)得到明顯提高(gao)，功率(lv)因數可維(wei)持在(zai)(zai)0.95以(yi)上，在(zai)(zai)負載(zai)波動(dong)的情況下(xia)可維(wei)持較高(gao)力能水平，對于該(gai)裝備容量與負載(zai)匹配(pei)情況，綜合節電率(lv)可達(da)15%以(yi)上。轉(zhuan)子結構緊湊(cou)靈(ling)活(huo)，可提高(gao)電機的轉(zhuan)子表面磁場強(qiang)度，進(jin)而提高(gao)轉(zhuan)矩密(mi)度，縮小體積和(he)重量。

永磁電機應用范圍

應用越(yue)發廣(guang)泛，包括(kuo)艦艇及潛艇用永磁電(dian)(dian)機(ji)、坦克及裝(zhuang)甲車驅動(dong)用永磁電(dian)(dian)機(ji)、船用推進(jin)器永磁電(dian)(dian)機(ji)、航天用驅動(dong)永磁電(dian)(dian)機(ji)，可實現按需調節，降(jiang)低無效(xiao)(xiao)能耗(hao)電(dian)(dian)機(ji)低負荷運行(xing)時(shi)，揚(yang)(yang)程和(he)流量都有較大余量問題，采(cai)用變(bian)頻調速(su)，可以根據實際(ji)的揚(yang)(yang)程和(he)流量需求(qiu)匹配電(dian)(dian)機(ji)的轉速(su)和(he)運行(xing)數(shu)量，使(shi)機(ji)組實時(shi)高(gao)效(xiao)(xiao)運行(xing)，降(jiang)低無效(xiao)(xiao)能耗(hao)。

永磁電機形式

永磁電(dian)(dian)(dian)(dian)動(dong)機(ji)的形式有：（1）矩形脈(mo)沖波電(dian)(dian)(dian)(dian)流，永磁無刷(shua)直流電(dian)(dian)(dian)(dian)動(dong)機(ji)PMBDC具(ju)有矩形脈(mo)沖波電(dian)(dian)(dian)(dian)流。（2）正弦(xian)波電(dian)(dian)(dian)(dian)流，永磁磁阻同(tong)步電(dian)(dian)(dian)(dian)機(ji)PSM具(ju)有正弦(xian)波電(dian)(dian)(dian)(dian)流。（3）混合式永磁電(dian)(dian)(dian)(dian)機(ji)。

永磁材料：

（1）稀土釤-鈷：能量(liang)密度zui大。

（2）釹鐵硼(peng)：資源(yuan)廣泛(fan)，加工性(xing)好(hao)。