Study On Measure And Control System Of The Linear Induction Motor And Electromagnet Testbench

For the practical application,in this paper a kind of measure and control system which based on LabWindows/CVI and DASYLab and can complete the data acquisition and process control of the linear induction motor(LIM) and electromagnet testbench is built.The testbench is used on the research of the key technologies of the meglev train.The hardware platform of the measure and control system consists of transducers,data acquisition modules, industrial control modules,eight-channel digital display instruments,display and control instruments and personal computer etc. .The interactive interface of the system is developed on the basis of the data acquisition software DASYLab and the program language LabWindows/CVI.On the one hand,the interactive interface designed by DASYLab is used to acquire the data from the WaveBook/512 and WBK.14.On the other hand, the active interface designed by LabWindows/CVI is used to acquire the data from the industrial control modules and control the modules.The system takes both advantages,the former is fast and convenient characteristics of DASYLab in building a control and measure system ,and the latter is the powerful program function and abundant control button of LabWindows/CVI.It can acquire,analysis and save the real-time data in the experiments of the LIM and electromagnet Meanwhile,it can control the start/stop of the LIM. electromagnet and DC motor,as well as it can control the change of the voltage and frequency of the LIM. the exciting windings voltage and rotor windings voltage of the DC motor . the windings voltage of electromagnet. The experiments of LIM and electromagnet can be executedon computer automatically.The tests and analysis have showed that the measure and control system has high accuracy and reliability.Firstly,this paper introduces the mechinic and electrical structures. measurement and control system of the testbench briefly. Secondly, it introduces the hardware platform of the measure and control system in detail.Thirdly,it introduces the design process of the interactive interface of the system.Finally,it shows the experiment results of the LIM and electromagnet.