6ES7321-1FF10-0AA0

6ES7321-1FF10-0AA0

6ES7321-1FF10-0AA0

兩相混合式步進電機步距角一般為1.8°、0.9°，五相混合式步進電機步距角一般為0.72°、0.36°。也有一些高性能的步進電機通過細分后步距角更小。如山洋公司（SANYODENKI）生產(chǎn)的二相混合式步進電機其步距角可通過撥碼開關設置為1.8°、0.9°、0.72°、0.36°、0.18°、0.09°、0.072°、0.036°，兼容了兩相和五相混合式步進電機的步距角。

交流伺服電機的控制精度由電機軸后端的旋轉(zhuǎn)編碼器保證。以山洋全數(shù)字式交流伺服電機為例，對于帶標準2000線編碼器的電機而言，由于驅(qū)動器內(nèi)部采用了四倍頻技術，其脈沖當量為360°/8000=0.045°。對于帶17位編碼器的電機而言，驅(qū)動器每接收131072個脈沖電機轉(zhuǎn)一圈，即其脈沖當量為360°/131072=0.0027466°，是步距角為1.8°的步進電機的脈沖當量的1/655。

ELECTRIVERT INC. CABLE ASSEMBLY ELV01J1008-10

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