一个伺服系统，不单单是一个电机。它是一个闭环的运动系统，包含了控制器、驱动器、电仪和反馈装置，通常一个还配有一个光学或磁编码器。
伺服系统能在采用永磁（permanent magnets ，PM）技术后同步机械，配以有刷或无刷PM电机，或在一个AC感应电机上建立异步机械系统。
永磁同步电机 有较高的峰值，以及持续的扭矩，适用于精确位移系统的高加速度和快速减速中的驱动伺服系统。扭矩与输入电流直接呈比例关系。电机轴速与输入的电压相关。输入电压越高，电机的速度就越高。扭矩和速度的比的曲线呈线性的。
永磁结构与电机气隙相关。如，无刷PM电机的结构，包含两个交互的磁结构，移动的转子（连接着永磁）和定子线圈产生电磁反应，从而出现电机的转矩和速度。
三相定子场能顺序产生能量，且PM转子跟随转子场一起完成同步运动。一个特定的电子补偿系统，用于检查转子位置，并为定子线圈加能量。无刷PM电机，在所有其他的电机中成为精确位移系统的首选，除了汽车应用以及超大电机系统中。无刷PM电机是仅有的伺服电机系统，能用于闭环扭矩、速度或位移系统。
以下是部分产品型号举例：
| VIA0702D02A0000 ISH070/60017/0/0/00/0/00/10/00 VIA0702D02F0000 ISH070/60017/0/0/00/0/00/11/00 VIA0702D02F0020 ISH070/60017/0/0/00/0/00/11/00 VIA0702D11A0000 ISH070/60017/0/1/00/0/00/00/00 VIA0702D11F0000 ISH070/60017/0/1/00/0/00/01/00 VIA0702D12A0000 ISH070/60017/0/1/00/0/00/10/00 VIA0702D12F0000 ISH070/60017/0/1/00/0/00/11/00 VIA0702D21A0000 ISH070/60017/0/0/00/0/10/00/00 VIA0702D21F0000 ISH070/60017/0/0/00/0/10/01/00 VIA0702D22A0000 ISH070/60017/0/0/00/0/10/10/00 VIA0702D22F0000 ISH070/60017/0/0/00/0/10/11/00 VIA0702D31A0000 ISH070/60017/0/1/00/0/10/00/00 VIA0702D31F0000 ISH070/60017/0/1/00/0/10/01/00 VIA0702D32A0000 ISH070/60017/0/1/00/0/10/10/00 VIA0702D32F0000 ISH070/60017/0/1/00/0/10/11/00 VIA0702DD1A0000 ISH070/60017/0/4/00/0/10/00/00 VIA0703D01A0000 ISH070/60022/0/0/00/0/00/00/00 VIA0703D01F0000 ISH070/60022/0/0/00/0/00/01/00 VIA0703D02A0000 ISH070/60022/0/0/00/0/00/10/00 VIA0703D02F0000 ISH070/60022/0/0/00/0/00/11/00 VIA0703D02F0020 ISH070/60022/0/0/00/0/00/11/00 VIA0703D11A0000 ISH070/60022/0/1/00/0/00/00/00 VIA0703D11F0000 ISH070/60022/0/1/00/0/00/01/00 VIA0703D12A0000 ISH070/60022/0/1/00/0/00/10/00 VIA0703D12F0000 ISH070/60022/0/1/00/0/00/11/00 VIA0703D21A0000 ISH070/60022/0/0/00/0/10/00/00 VIA0703D21F0000 ISH070/60022/0/0/00/0/10/01/00 VIA0703D22A0000 ISH070/60022/0/0/00/0/10/10/00 VIA0703D22F0000 ISH070/60022/0/0/00/0/10/11/00 VIA0703D31A0000 ISH070/60022/0/1/00/0/10/00/00 VIA0703D31F0000 ISH070/60022/0/1/00/0/10/01/00 VIA0703D32A0000 ISH070/60022/0/1/00/0/10/10/00 VIA0703D32F0000 ISH070/60022/0/1/00/0/10/11/00 VIA0703DC1F0000 ISH070/60022/0/3/00/0/10/01/00 VIA0703DD1A0000 ISH070/60022/0/4/00/0/10/00/00 VIA0703DD1F0000 ISH070/60022/0/4/00/0/10/01/00
ELAU伺服电机VIA1001C01A0000 ISH100/30025/0/0/00/0/00/00/00 ELAU伺服电机VIA1001C01F0000 ISH100/30025/0/0/00/0/00/01/00 ELAU伺服电机VIA1001C02A0000 ISH100/30025/0/0/00/0/00/10/00 ELAU伺服电机VIA1001C02F0000 ISH100/30025/0/0/00/0/00/11/00 ELAU伺服电机VIA1001C11A0000 ISH100/30025/0/1/00/0/00/00/00 ELAU伺服电机VIA1001C11F0000 ISH100/30025/0/1/00/0/00/01/00 ELAU伺服电机VIA1001C12A0000 ISH100/30025/0/1/00/0/00/10/00 ELAU伺服电机VIA1001C12F0000 ISH100/30025/0/1/00/0/00/11/00 ELAU伺服电机VIA1001C21A0000 ISH100/30025/0/0/00/0/10/00/00 ELAU伺服电机VIA1001C22A0000 ISH100/30025/0/0/00/0/10/10/00 ELAU伺服电机VIA1001C22F0000 ISH100/30025/0/0/00/0/10/11/00 ELAU伺服电机VIA1001C31A0000 ISH100/30025/0/1/00/0/10/00/00 ELAU伺服电机VIA1001C31F0000 ISH100/30025/0/1/00/0/10/01/00 ELAU伺服电机VIA1001C32A0000 ISH100/30025/0/1/00/0/10/10/00 ELAU伺服电机VIA1001C32F0000 ISH100/30025/0/1/00/0/10/11/00 ELAU伺服电机VIA1001CC1F0000 ISH100/30025/0/3/00/0/10/01/00 ELAU伺服电机VIA1002C01A0000 ISH100/30044/0/0/00/0/00/00/00 ELAU伺服电机VIA1002C01F0000 ISH100/30044/0/0/00/0/00/01/00 ELAU伺服电机VIA1002C02A0000 ISH100/30044/0/0/00/0/00/10/00 ELAU伺服电机VIA1002C02F0000 ISH100/30044/0/0/00/0/00/11/00 ELAU伺服电机VIA1002C11A0000 ISH100/30044/0/1/00/0/00/00/00 ELAU伺服电机VIA1002C11F0000 ISH100/30044/0/1/00/0/00/01/00 ELAU伺服电机VIA1002C12A0000 ISH100/30044/0/1/00/0/00/10/00 ELAU伺服电机VIA1002C12F0000 ISH100/30044/0/1/00/0/00/11/00 ELAU伺服驱动器VDM01D10AA00 MC-4/11/10/400 - FW: SERIAL ELAU伺服驱动器VDM01D22AA00 MC-4/11/22/400 - FW: SERIAL ELAU伺服驱动器VDM01D50AA00 MC-4/10/50/400 - FW: SERIAL ELAU伺服驱动器VDM01U15AA00 MC-4/11/01/400 - FW: SERIAL ELAU伺服驱动器VDM01U30AA00 MC-4/11/03/400 - FW: SERIAL ELAU伺服驱动器VDM01U50AA00 MC-4/11/05/230 - FW: SERIAL |
