西門子6ES7314-6BH04-0AB0

所在地: 福建省 廈門市
發布時間: 2025-03-17
詳細信息

6ES7314-6BH04-0AB0

要使電動汽車有較好的使用性能,驅動電機應具有較寬的調速範圍、較高的轉速、足夠大的起動扭矩,以及體積小、重量輕、效率高,並具有強動態制動和能量回饋等特性。 目前,電動汽車用電動機主要有異步電動機(IM)、永磁無刷電動機(PMBLM)和開關磁阻電動機(SRM)、橫向磁場電機(TFPM)等四類。 各種電機有各自的優缺點,以下就分別作以比較:

1、異步電動機

結構簡單、堅固、成本低廉、運行可靠,轉矩脈動小,噪聲低,不需要位置傳感器,轉速極限高; 缺點是驅動電路復雜,成本高,相對永磁電機而言,異步電機效率和功率密度偏低。

2、永磁無刷電動機

永磁同步電動機具有效率和轉矩密度高、轉矩平穩及低振動噪聲等特點,成為電動汽車電控部件的理想選擇。 永磁輪轂電機驅動可以靈活地布置於電動車輛的前輪和後輪,甚至於直接驅動輪轂旋轉。 已在國內外多種電動車輛中獲得應用。

3、開關磁阻電動機

開關磁阻電機具有簡單可靠、可在較寬轉速和轉矩範圍內運行、可四象限運行、響應速度快和成本較低等優點。 但其缺點也很多:轉矩存在較大波動,振動大,噪聲大; 係統非線性,建模困難,控制成本高; 功率密度低等。

4、橫向磁場電機

與其他電機相比,橫向磁場電機的優點十分突出:實現了電路和磁路解耦,設計自由度大大提高; 高轉矩密度,且特別適合應用於要求低速、大轉矩等場合; 繞組形式簡單,不存在傳統電機的端部,繞組利用率高; 各相間相互獨立; 效率高; 控制電路與永磁無刷電動機相同,可控性好等。 但其也存在不少缺點:永磁體數目多,用量大; 結構較為復雜,工藝要求高,電機成本高; 漏磁嚴重; 功率因素低; 自定位轉矩較大等。


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