The Research On Energy Conservation Controller For Asynchronous Motor

Because of such advantage of the asynchronous motor as simple structure, the reliable running, the convenient service and cheap price, it is widely applied in all trades and occupations. It is well known that motor which is direct-on starting has many malpractices. When electrical machinery light-loading running, the power lose increases, the efficiency and power factors both greatly reduce. Therefore it has extremely vital significance to implement effective control on asynchronous motor, guaranting the security of the electrical machinery , avoiding the electrical network impact, enabling it economy running. This paper was precisely had considered above situation, has studied a system based on the 87C196KC which having two kind of control functions-soft start/soft stop and light-loading conserving energy. And has conducted the simulation research. The simulation analysis and the design may comprehensively synthesize considered the influence of each kind of factor on conserving energy the control fixture archery target, which has the vital significance to reduce the development cycle, reduce the development expense and optimize the control plan.This article has first carried on the power loss analysis of the asynchronous motor, has established the three-phase asynchronous motor model and equivalent circuit through the circuit analysis and mathematics inferential reasoning. Relationship of the loss and the stator terminal voltage have been discussed separately, when the load is constant and variable. Through the analysis, the asynchronous motor soft starting frequency and the starting voltage value have been get. The change rule of the three-phase asynchronous motor power factor angle has been analyzed. And the fuzzy control technology has been studied that reduce the stator terminal voltage to achieve higher power factor through testing power factor and using certain rules. The asynchronous motor intelligence operating control system plan design has been completed. Simulation design and simulation experiment of the system has been carried on, and the simulation result indicated this intelligence control system has achieved the anticipated effect. In the article also proposed the certain solution for some technical difficulties and key question about the asynchronous motor intelligence controller. This article has developed a method to lead through the examination crystal thyratron passing with shutting off, as well as the examination electrical network voltage synchronized signal, realizes the the...