The Research on Control System of Sensorless PMSM

　　The Research on Control System of Sensorless PMSM
　　Permanent magnet synchronous motor (PMSM) have no exciting current in the rotor, and are of high efficiency and power density. But motion control of permanent magnet synchronous motors requires accurate position and velocity signals to accomplish field orientation. In conventional motion control systems, optical encoders or rotary transformer Ball Neodymium Magnets are used for these purposes. However, these additional sensors increase the costs of the system and reduce the reliability. With this background, the research based on the abolishment of these sensors to increase the reliability and decrease the costs is becoming popular.International Rectifier Co. offers a new controller family referenced IRMCF341, which is specifically designed for the needs of sensorless digital motor control. In a single chip application, this device combines a fixed point core with micro-controller peripherals, which combines high-speed signal processing and the ability to optimize motor control peripheral integrated circuits, drive control can provide a reliable and efficient high-performance signal processing and control.On the basis of the summary for the development and application of PMSM motor http://www.chinamagnets.biz/Neodymium/Ball-Neodymium-Magnets.php speed-variable system, this dissertation introduces a control system, which uses IRMCF341 to control the commutation and speed of PMSM. The basic structure, operational principle and design method of this system are set forth in this dissertation. The thought of hardware design and software programming is introduced as well. At last, the experimental results presented are reasonable, feasible,so that the effect of motor control is well.