Research on Digital Dual-redundancy Permanent Magnet Synchronous Motor Speed Control System

　　Research on Digital Dual-redundancy Permanent Magnet Synchronous Motor Speed Control System
　　With the development of the electrical transmission system, the DC motor has played an important roll because of its easy controlling. With the development of AC motor, the AC motor system is increasingly wide used for the military and civil usage. For example, in the field of aviation and electrical equipment such as air conditioners and refrigerators, the AC motor system is occupying the dominant position.In many electrical systems, in order to enhance the ability of fault resistance and safety, redundancy technology is one of the effective means. Currently Cast Alnico Magnet the brushless DC motor for steering system has been extensively studied. And similar to brushless DC motor, the permanent magnet synchronous motor also has high power density, low loss, fast response characteristics. And because of the better performance than brushless DC motor, such as small positioning error, small torque ripples; it has irreplaceable advantages in high-precision occasions.This paper studies dual-redundancy permanent magnet synchronous motor speed control system. First introduce the control strategy of dual-redundancy motor system, based on the characteristics of permanent magnet synchronous motor. The system models were established in the MATLAB / SIMULINK; the current and speed closed-loop model were simulation in different patterns. In analysis of the space vector modulation theory, http://www.chinamagnets.biz/Alnico/Cast-Alnico-Magnet.php we propose a new method, compared to the traditional space vector modulation method does not need division sector, which simplifies the sector computing, in particular the algorithm in Digital control of the space vector is simplified. Finally we analysis the key technologies of redundancy system.The hardware is established based on DSP2407 core with CPLD. The software corresponding to the different patterns based on the DSP assembly language. The experimental results show that the theoretical analysis in this paper is correct and dual-redundancy permanent magnet synchronous motor system is feasible.