Research On Multi-motor Synchronization Control Strategy Based On TMS320F28379D

With the increasing demand of industrial production,multi-motor system has been widely used in industrial production,and higher requirements have been put forward for the precision of motor synchronous control.There are two main directions to improve the precision of multi-motor synchronous control: first,the control precision of one motor is higher.Traditional PI regulation is widely used,but its dynamic accuracy has some defects.Second,communication without delay between multiple motors should be achieved.Using traditional communication bus pass information will bring a certain amount of time delay,modern industrial real-time communication bus for example Ether CAT,SERCOS Ⅲ can transfer information between different motors without time delay,but its expensive equipment and implement mechanism is complicated.In this paper,the traditional motor control mode is improved and TMS320F28379 D dualcore chip is used to realize the synchronous control of dual-permanent magnet motors.In this paper,the mathematical model of permanent magnet synchronous motor and the space vector pulse width modulation are analyzed and introduced,from which the magnetic field orientation control with position and speed adjustment can be accomplished.Then,using Sigma-Delta ADC and SDFM module with simple sampling circuit to complete accurate and fast motor current sampling.is proposed Based on the research of traditional magnetic field directional control,the position feedforward control is proposed to improve the robustness and precision of motor control.Secondly,the hardware platform and software of the experiment are introduced in detail,and the principle of IPC communication in dual-machine synchronous control is illustrated,so the theoretical basis of synchronous control of two permanent magnet synchronous motors is obtained.Next,the MATLAB/Simulink simulation and experiment research of a single permanent magnet synchronous motor are carried out to verify the improvement of the feedforward control for the motor control performance,so as to realize the high performance control of a single motor.The feasibility of using SDFM to complete current detection is verified in the experiment.Then it is the simulation and physical research of two permanent magnet synchronous motors.According to the different connection modes and application scenarios of the two motors,different control strategies are proposed.The simulation and experimental results show that the proposed control strategies can effectively synchronize the two permanent magnet synchronous motors.At the end of the paper,the research of this paper is summarized and further prospects are given.TMS320F28379 D chip can be used to control up to 4 permanent magnet synchronous motors simultaneously.