The Design And Realization Of High Performance Drive System For Two-phase Hybrid Stepper Motor

Stepper motor is a digital motor which has the advantages of no stepping accumulated error and low cost, so it is widely used in the fields of life and production. Differently from other motors, stepper motor needs a motor driver for working. The low frequency oscillation and the moment frequency characteristics are two problems which should be considered when we design stepper motor driven system. The improvements of drive performance affect the development of the stepper motor. Therefore, it has important practical significance to study a stepper motor drive system with high performance and control method.The studies of high performance driving and controlling method for two-phase hybrid stepper motors are proposed and analyzed to reduce the low-frequency oscillation and improve the moment-frequency characteristics in this thesis. Firstly, an exponential acceleration and deceleration control technology combined with stepped mode is given after contrasting different time speed theory curve equation. Then, according to analyze Logistic growth model and current compensation control method, new frequency-voltage modulation drive technique is proposed for the use of stepping motor. And frequency-voltage regulator control curve is given by Gauss-Newton method. The supply voltage of the motor driven is following up the operating frequency of motor.Experimental research platform has built for the two-phase hybrid stepper motor. Control systems include MCU STM32F103control circuit, power driver circuit, frequency-voltage regulator power and current sampling feedback circuit. All detailed design of the various circuits is given. In addition, PC control interface also has designed for convenient experimental control and research.Experiments have verified the superiority of the control strategy, and the experimental waveforms are given in the article. The results show that:the implementation of the system has the advantages of simple structure and portability. Stationary and high-frequency performance can be found when the system is running, so this study owns a certain amount of research and practical value.