This article introduces the characteristic and function of AC-AC frequency conversion vector control system used in main driving motor in the CSP finishing mill,and expatiates the basic theory of AC-AC frequency conversion vector control.

With the developing of electric,shaft winder system use the electric control system,drived by cycloconverer synchronous motor and realized full load and automation,becomes a perfect control model.

Damped flux linkage oriented drive system for cycloconverter fed synchronous motor;

The study of rotor position detecting technology for cycloconverter-fed synchronous motor;

This paper presented the necessity of electrical control device of 2 m explosion-proof cycloconverter winch on the basis of analysis of the present situation of 2 m explosion-proof winch.

To resolve the problem in heavy load starting of motor,the method of AC/AC frequency-converter with 80C196KC+DSP as control core was put forward.

Debugging the cycloconverter for synchronous motor of hot rolling mill's main drive;

As the complex control system of cycloconverter synchronous motor s magnetic orientation,the operate character analyzing becomes one of the difficult problems which troubled the maintenance technique engineers for a long time.

At the assumption of symmetry of 4 Y windings of 12-phase synchronous motor,the control method of controlling only onesingle “Y” windings and shifting related angles to other “Y” windings can be apply to variable speed system with cycloconverter-fed12-phase synchronous motor.