西门子6AV2124-1QC02-0AX1

6AV2124-1QC02-0AX1

交流伺服电机也是无刷电机，分为同步和异步电机，目前运动控制中一般都用同步电机，其功率范围大，功率可以做到很大，大惯量，高转速低，转速随功率增大而匀速下降，适用于低速平稳运行场合

伺服电机内部的转子是永磁铁，驱动器控制U/V/W三相电形成电磁场，转子在此磁场的作用下转动，同时电机自带的编码器将反馈信号传给驱动器，对反馈值与目标值进行比较，从而调整转子转动的角度，伺服电机的精度决定于编码器的精度(线数)。

Q   交流伺服电机和无刷直流伺服电机在性能上有什么区别?

A  交流伺服电机的性能要好一些，因为交流伺服是正弦波控制，转矩脉动小;而无刷直流伺服是梯形波控制。但无刷直流伺服实现控制比较简单，便宜。

永磁交流伺服驱动技术的迅猛发展使直流伺服系统面临被淘汰的危机[/p][p=30，2，left]20世纪80年代以来，随着集成电路、电力电子技术和交流可变速驱动技术的发展，永磁交流伺服驱动技术有了突出的发展，各国电气厂商相继不断推出新的交流伺服电机和伺服驱动器系列产品。交流伺服系统已成为当代伺服系统的主要发展方向，使直流伺服系统面临被淘汰的危机。

永磁交流伺服电动机同直流伺服电动机比较，主要优点有：

⑴无电刷和换向器，运行更可靠，免维护。

⑵定子绕组发热大大减少。

⑶惯量小，系统快速响应性好。

⑷高速大力矩工作状态好。

⑸相同功率下体积小重量轻。

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