Model Predictive Control Of A Permanent Magnet Synchronous Machine Fed By A Matrix Converter

AC speed regulation technology is the focus and hotspot in the research of the motor system and frequency control, which has the advantages of better performance of speed adjustment and higher efficiency, has become a kind of ideal speed control scheme. As a complementary and alternative technology of AC-DC-AC PWM frequency converter and traditional AC-AC frequency conversion circuit, matrix converter has the following advantages: good four quadrant operation characteristic; small harmonic pollution; good EMC characteristics; network-side reactive power compensation capacity; compact structure, fast dynamic response, high energy transfer density. Therefore, matrix converter occupies a very important position in the field of AC frequency conversion and has already aroused the interest of scholars around the world. Its related research has also made a series of highly productive results and show great potential applications.Model predictive control (MPC) is applied to the TSMC-PMSM speed regulation system in this paper and the main contents are as follows:Firstly, on the basis of structure and principle of PMSM, the mathematical model of PMSM is analyzed. And in combination with the principle and characteristics of MPC, this control method is applied to PMSM speed regulation system. After that, aiming at the problems existing in the traditional MPC method, an improved model predictive control method of PMSM have been proposed in order to reduce the amount of calculations in the practical implementation of this method. By solving the reference voltage space angle and utilizing the sector information of the reference voltage space vector, the proposed method just needs a subset of all the switch statuses for the prediction and optimization. Therefore, the . computational effort has been greatly reduced.Moreover, the principle of MPC of TSMC is analyzed. The calculation of MPC is large when the number of switches is large, such as MC. Therefore, a high-speed controller is required. In this paper, a hardware implementation method of the system is designed by using FPGA and DSP as a slave controller. The functions of DSP and FPGA achieved respectively and MPC algorithm implementation on FPGA are described specifically. An experiment platform has been built eventually.At the end, MPC method is applied to the TSMC-PMSM system and a hardware implementation method of the system is proposed. At the same time, the timing simulation of this algorithm on the FPGA is given. Based on the simulation in Matlab/Simulink, some ideal simulation results are obtained and these results also verify the feasibility of MPC algorithm in this system.