Speed identification of speed sensorless linear induction motor based on MRAS

In the linear induction motor control system, optical grating speed transducer is susceptible to strong magnetic field interference. What's more, it may reduce integration and raise device costs. Therefore a identification method replace studied in this article. This for mainly adopts Model Reference Adaptive Method (Abbreviated as MRAS) Popov Hyperstability Theory. The research content of paper can be divided into four parts. First, mathematical model based on reference adaptive system structure deduced. Second, law estimated solved by hyper-stability theory, which ensures stability system. Third, simulation adaptation built MATLAB environment. Finally, test analysis are carried out. results show that track actual well no-load operation load operation, guaranteed full range.