Synchronous Motor Adjustable Speed System

The production line of the plate mill in Chongqing Iron and Steel Company go through the technical transformations. the whole productivity of the plate mill raised consumedly.But the bottleneck restriction of the finish rolling reared out completely, The main performance is the main drive motor of the finish rolling ability shortage. Carry on the reformation to the main drive of the finish rolling, this text put forward, adopting the cycloconventer driving system replaces F-D power supply method, Adopt the cycloconverter system can improve the finish rolling ability, can also economize on energy consumedly at the same time, reducing the shutdown time of main drive of the finish rolling.This paper according to the product outline of the the plate mill, The productivity 800,000 ton per year to calculate, Aim at the production Technical specifications of the rolling mill, a project and lectotype design is carry out on the cycloconverter variable speed control system of synchronous machine.This paper according to the cycloconverter-fed field-oriented synchronous motor(SM) control theories and combine the rough rolling reformation engineering experience, below items have been worked out: the design of cycloconverter-fed topology; completed the calculation of each electricity quantity( voltage, current), the design of the Thyristor , the design of the transformer parameter, the design of the synchronous machine parameter, reactive power and harmonic calculation of The cycloconventer, each kind of protective design etc..The main the electric drive of the rough rolling in The mill plate economizing energy reformation adopts the German Siemens SIMADYND control system, The system's calculator hardware mold piece is from abroad to import, the project software, the system design and debugging to be gather by the domestic, nowadays that system attain international advanced level , and then reduced the investment( investment only for all import of 1/4), the national product turns the rate high, and raised my company equipments material level and maintenance level, It was called" CQ Iron and Steel mode" by the national economic trade committee , the national section committee leadership compliment, the national metallurgy profession association decides to spread in the rolling main drives expand strongly.