Design And Implementation Of Induction Motor Vector Control System

With the development of social economy, in the actual industrial applications in the industry, the level of electrical production is increasing, because the production process is becoming more complex, more detailed processing. This requires the motor must be able to complete the fast, smooth, multi frequency speed control task. In the actual control process, in addition to the constant speed constant frequency operation in common, including constant acceleration and constant deceleration and complicated operation of other forms.This paper first introduces ntroduces the working principle of frequency control of motor speed induction motor, induction motor is introduced and the properties of dynamic mathematical model, this paper expounds the basic concepts of vector control of induction motor, the principle of vector control are analyzed and the method of coordinate transformation. Introduces the mathematical model of induction motor, this paper introduces the characteristics of the induction motor and the mathematical model of multivariate, expounds the basic concept of asynchronous motor vector control, analyzes the principle of vector control and vector coordinate transformation method, which focuses on the SVPWM control technology in the application of induction motor variable frequency speed regulation system, set up the open loop control variable frequency speed regulation asynchronous motor model, realize the constant speed, constant acceleration and constant deceleration three operation modes of the simulation, the EMD decomposition of the stator voltage, the instantaneous frequency of consistent with the set value; On the stator current vector analysis, spectrum analysis and Park to get the vector trajectory of the figure is consistent with the theory, these prove the validity of the modeling method.For induction motor vector control PWM inverter power supply characteristics of variable frequency speed regulation system, set up a model of vector control of induction motor variable frequency speed regulation system, completed the vector control system software design, including the writing of the code and program debugging on test platform. Package to complete the coordinate transformation, model calculation, calculation of quantity of control and SVPWM modulation pulse output. Through kingview software at the same time, realize the communication between MCU and PC, designed the human-computer interaction interface, this interface program running on a PC, PC connected to the control panel via a serial port on PC related operation and can realize the speed of the motor, given positive &negative control, and the start-stop motor.