Research Of Parameter Identification And Sensorless Control Algorithm Based On 28069M

The sensored control technology has developed much mature,and the control performance has reached a high level,which can meet most of the application requirements.But the mechanical position detection device will increase the hardware cost and cause problems of installation and maintenance.So sensorless control technology has attracted more and more attention.A sensorless control system is built based on TI’s TMS320F28069M,and the parameter identification and sensorless control algorithm is analyzed in this paper.Firstly,the main function of TMS320F28069M is introduced,and so is the mathematical models of PMSM and ACIM and the sensorless vector control theory.Secondly,the sensorless control experiment system is built based on TMS320F28069M,and the corresponding software program is designed.Besides,two kinds of debugging tools were designed for experiments.The first one is based on eCAN.The second one is based on Ethernet interface added by W5500.Data transmission can be done by both kinds of debugging tools,and graph can be displayed in real time,which meet all the requirements.Finally,the theory of voltage reconstruction is introduced,and the effect of real dead time was analyzed.Using the characteristic that the stator resistance identification results of the same motor remained the same,the method to get the real dead time by identifying the resistance twice was designed,and the voltage reconstruction formula was completed,and the accuracy was enhanced.Parameter identification and sensorless control experiments were carried out by using the voltage reconstruction instead of voltage detection.The results show the effectiveness of 28069M’s algorithm and the practicability of voltage reconstruction which can be used in practical application.