Research Of Vector Control System Without Speed Sensor Based On MRAS Induction Motor

Vector control theory of the rise, promotion and application, gradually replace the DC speed control system with AC variable speed system and become the main subject of the researchers study high performance AC speed control system. Speed sensor technology eliminates the need for speed sensor, the system can reduce the cost and complexity of AC variable speed system, at the same time, enhances the environmental adaptability of the system. In recent years, the combination of the two technologies by the speed sensor and vector control speed sensor less vector control technology has become a hot research. Based on this, we will be asynchronous motor speed sensor less vector control system depth research.Specific instructions based on vector control, vector coordinate transformation, the establishment of a mathematical model of the asynchronous motor, a detailed analysis of the basic principle of the rotor field oriented vector control system. Subsequently, the paper introduces the basic principle and the method of space vector modulation technology, conducted a comprehensive analysis of the impact of vector control precision flux observer model reference adaptive control theory and the theory based on model reference adaptive speed estimated were studied.In order to achieve motor control in Matlab simulation platform to establish a control system simulation module, combined model reference adaptive speed estimation theory and vector control theory to build speed sensor less vector control system simulation model, and as the basis of a simulation study, a comparative analysis of speed sensor less vector control system and the effect of speed sensor less vector control of induction motors.Finally, the DSP development platform based on a small motor to achieve a small power induction motor speed sensor less vector control.