| The rapid development of China’s economy can not be separated from the upgrading of manufacturing technology,and the core of the manufacturing technology is the motor control system.Only our country has mastered the high precision motor control technology,and its manufacturing industry can make great progress.Therefore,the independent innovation in the field of electronic control has important theoretical and practical significance.At present,the field of motor control in China has made great progress in both scientific research and market product.However,due to the performance of the chip and other reasons,the performance of the motor control products can be further improved.With the traditional single core DSP as the core of the motor controller compared with DSP and FPGA(Field-Programmable Gate Array)as the core controller has better performance,the dual core controller can make full use of their advantages.At the same time,because of the advantages of permanent magnet synchronous motor,such as high efficiency,cost-effective,small volume and other advantages,R &D of permanent magnet synchronous motor controlled by rare earth permanent magnet can make good use of the resource advantages of rare earth.A permanent magnet synchronous motor control system with dual core DSP+FPGA sliding mode control is designed in this paper.First,on the basis of deep analysis of the structure and working principle of permanent magnet synchronous motor,a mathematical model for engineering practice is established.In order to improve the robustness of permanent magnet synchronous motor system,a SMC strategy is adopted to solve chattering problem,and a variable gain sliding mode controller is proposed to suppress chattering.Secondly,the platform of permanent magnet synchronous motor is built by using MATLAB,and the coordinate transformation unit,SVPWM unit and sliding mode controller are introduced emphatically.The simulation results show that the new sliding mode controller has strong robustness and excellent static and dynamic performance.Thirdly,the system hardware and software are designed.The DSP+FPGA core of the system hardware design,including sampling circuit,protection circuit,position detection circuit,power circuit,the main circuit of the motor stator current;the software part is carried out using DSP sliding mode vector control operation,coordinate transformation and communication function,FPGA is used as the auxiliary chip,mainly its processing speed advantage,complete SVPWM,current sampling,position sensor module,speed measurement,system protection function.Finally,an experimental platform with DSP and FPGA as the core is built,and a new SMC algorithm with DSP and FPGA as the core is verified.The load experiment was carried out on the platform.The experimental results show that the system described in this paper has the characteristics of fast response speed,high steady state precision,safe and reliable and so on. |
