Research On The PMLSM Driven System Based On STM32

In recent years, linear motors are more and more adopted in industry application and daily life. Compared with traditional rotating motors, linear motors could realize linear motion without intermediate gearing. What's more, because of no centrifugal force, Linear motors are very suitable for the high-speed applications. With the development of permanent magnet materials, the dimension of permanent-magnet machines is decreasing. Permanent synchronous linear motors driven system are more and more popular. On this background, this paper uses STM32F103 chip as the controller and substitutes linear hall sensors for the linear encoder to research and develop the permanent magnet linear motor driven system.Firstly, this paper derived different mathematic models of the motor in different coordinate systems and introduced basic theory of vector control and space vector pulse width modulation. As to the features of vector control, current and speed closed loop control structure is applied and the control model is set up in MATLAB/SIMULINK simulation environment. And the result is given, which verified the correctness of the method.Secondly, on the basis of theoretical preparation and simulation verification, both software and hardware platform are built up. The hardware platform mainly includes STM32F103 controller and three phase voltage source inverter based on Mitsubishi DIP-IPM PS21965. The software platform mainly includes the software project of STMF103 and the monitor program on PC based on Visual Basic. This paper further studied four key problems in the progress of building of the platform, which is the calculation of the electrical angle and speed of the mover using linear hall sensors, the initial position search of the mover, Integrator of PI adjuster's wind-up problem and the optimization of chip's floating point arithmetic performance. Four corresponding solutions are presented in this paper.Finally, experiments are conducted on the designed platform. The performance of the correctness of the calculation of the mover's electrical angle and speed, realization of space vector pulse width modulation, the dynamic response of current closed loop and the speed closed loop are tested and analysised. The result of the experiment indicated that the presented design that using linear hall sensor in the vector control of permanent magnet linear synchronous motor driven system is of good stability and dynamic performance, which lays foundation for the following study of linear driven system.