In order to avoid synchro motor s operating asynchronously,a new asynchronous protection plan on basis of synchro motor power-angle measurement is presented.

Having discussed various ways of power- supply by field power supply of synchro motor ,main causes which influence the reliability of synchro motor field are found out,at the same time ,improvements are put forward.

This paper analyzes how the non - probe exciter of synchro motor works and functions on the basis of the No.

Research on starting of brushless synchronous motors;

It discusses the design of permanent magnetism synchronous motors and its rotor and stator;analyed different forms of permanent magnetism material and rotor and influence of power angle on the engine;it provides the optimal design schematic of electric machine for adjustable-speed control syestem;it will be more widespread applicatied in the adjustable-speed drive system in the future.

This paper analyzes the technology characters of the brushless three-phase synchronous motors TW3200-4/1500.

Improvement and Application on Synchromotor Field Equipment;

Discussion on problems in revamping the exciting system of 1ДAПsynchromotor of aluminum hot rolling mill;

Intelligent control of brushless excitation system for synchromotor;

The analysis of thyristor exciting magnetism set of mine high-voltage synchronous motor;

Using synchronous motor of load phase change to control the system of mine fan;

Application of load-commutated inverter fed synchronous motor in the main drive for high speed wire finishing mill;