yibubianpintiaosudianjishiyouputongyibudianjipaishengerlai，youyuyaoshiyingbianpinqishuchudianyuandetexing
，dianjizaizhuanzicaoxing，jueyuangongyi，diancishejixiaohedengzuolehendadegaidong，tebieshidianjidetongfengsanre，tazaiyibanqingkuangxiafujialeyigedulishiqiangpolengquefengji，以適應電機在低速運行時的高效散熱和降低電機在高速運行時的風摩耗。變頻器的輸出一般顯示電源的輸出頻率，轉速輸出顯示為電機的極數和電源輸出頻率的計算值
，與異步電機的實際轉速有很大區別，使用一般異步變頻 
   diandongjishi
，youyuyibudianjidezhuanchalvshiyoudianjidezhizaogongyijueding
，guqilisanxinghenda
，bingqiefuzaidebianhuazhijieyingxiangdianjidezhuansu
，yaojingquekongzhidianjidezhuansuzhinengcaiyongguangdianbianmaqijinxingbihuankongzhi，dangdanjikongzhishizhuansudejingduyoubianmaqidemaichongshujueding，dangduojikongzhishi，duotaidianjidezhuansujiuwufayangetongbu。zheshiyibudianjixiantiansuojuedingde。 
   同tong步bu變bian頻pin調tiao速su電dian機ji的de轉zhuan子zi內nei鑲xiang有you永yong磁ci體ti，當dang電dian機ji瞬shun間jian起qi動dong完wan畢bi後hou，電dian機ji轉zhuan入ru正zheng常chang運yun行xing，定ding子zi旋xuan轉zhuan磁ci場chang帶dai動dong鑲xiang有you永yong磁ci體ti的de轉zhuan子zi進jin行xing同tong步bu運yun行xing，此ci時shi電dian機ji的de轉zhuan速su根gen據ju電dian機ji的de極ji數shu和he電dian機ji輸shu入ru電dian源yuan頻pin率lv形xing成cheng嚴yan格ge的de對dui應ying關guan係xi，轉zhuan速su不bu受shou負fu載zai和he其qi他ta因yin數shu影ying響xiang。同tong樣yang同tong步bu變bian頻pin調tiao速su電dian機ji也ye附fu加jia了le一yi個ge獨du立li式shi強qiang迫po冷leng卻que風feng機ji
，以yi適shi應ying電dian機ji在zai低di速su運yun行xing時shi的de高gao效xiao散san熱re和he降jiang低di電dian機ji在zai高gao速su運yun行xing時shi的de風feng摩mo耗hao。由you於yu電dian機ji的de轉zhuan速su和he電dian源yuan頻pin率lv的de嚴yan格ge對dui應ying關guan係xi，使shi得de電dian機ji的de轉zhuan速su精jing度du主zhu要yao就jiu取qu決jue於yu變bian頻pin器qi輸shu出chu電dian源yuan頻pin率lv的de精jing度du，控kong製zhi係xi統tong簡jian單dan，對dui一yi台tai變bian頻pin器qi控kong製zhi多duo台tai電dian機ji實shi現xian多duo台tai電dian機ji的de轉zhuan速su一yi致zhi
，也ye不bu需xu要yao昂ang貴gui的de光guang學xue編bian碼ma器qi進jin行xing閉bi環huan控kong製zhi。 
   TYP變頻調速永磁同步電機具有的三大優點： 
   1
、高效節能:與異步變頻調速電機相比
，高效節能。同規格相比
，該係列電機效率比異步變頻電機效率高3~10個百分點。以1.5kW為利，兩者效率差近7個百分點； 
   2、可精確調速:與異步變頻係統相比，無需編碼器即可進行準確的速度控製

； 
   3
、高功率因數:既可減少無功能量的消耗，又能降低變壓器的容量