CONTROL TECHNIQUES 已经从EMERSON 集团 转到 NIDEC 集团旗下，现在铭牌显示品牌为 NIDEC
055UDA305BACRA063110: Unimotor HD系列 伺服电机, 电压:460VAC, 55mm 机座规格, 6.2lb-in (0.7Nm), 0.97A, 3krpm, Inc. Enc. 4096ppr,是否带刹车：是，带**刹车, size 1.0 power, 90° rot. conns, Key installed, std inertia, 63mm BCD,11mm shaft dia.
089UDB306BARAA
089UDB400BACAA
089UDC300BAGBA
089UDC300RBWBA100190-SKTY
089UDC305BACAA
089UDC305BAECA
089UDC30XBBWBA100190-SRCA
089UDC400BAAEA
095E2A400BACAA100140
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095U3E305CACAA100190
095UM2B300CACAA
095UMB200CACAA
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095UMB300VACAA
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095UMD300CACAA
095UMD301BBCAA
095UMD305BBCAA
095UME300BACAA
095UME305BBCAB
交流伺服电动机在没有控制电压时，气隙中只有励磁绕组产生的脉动磁场，转子上没有启动转矩而静止不动。当有控制电压且控制绕组电流和励磁绕组电流不同相时，则在气隙中产生一个旋转磁场并产生电磁转矩，使转子沿旋转磁场的方向旋转。但是对伺服电动机要求不仅是在控制电压作用下就能启动，且电压消失后电动机应能立即停转。如果伺服电动机控制电压消失后像一般单相异步电动机那样继续转动，则出现失控现象，我们把这种因失控而自行旋转的现象称为自转。
