n.测速发电机(转速表传感器)
Each of them consists of a three-phase asynchronous motor,an eddy-current coupling and a tachogenerator. 是一种控制简单、具有测速负反馈系统的交流恒转矩无级调速电动机，能在较宽的转速范围内进行平滑的无级调速。
Relationship between main specification of AC tachogenerator in the new and old standard is discussed in this paper. 摘要讨论新老标准中交流测速发电机主要技术指标间的关系；
It explains notice proceedings in AC tachogenerator application and method to compute output gradient for AC servomotor tachogenerator with reducer. 对交流测速发电机使用注意事项和带有减速器的交流伺服-测速机组的输出斜率计算方法作了说明。
This paper presents a vector control system orientated by stator electromotive force(EMF)of cycloconverter-fed asynchronous motors without tachogenerator or pulse generator. 本文结合矢量控制原理，介绍一种无测速电机或码盘的异步电机按电势走向的交交变频矢量控制系统。
D.C. torque motor high sensitivity tachogenerator 直流力矩电动机高灵敏度测速机机组
