DSP-based Coal Mine Belt Conveyor Control System

Belt Conveyor is a modern coal mine High Production and Efficient transport equipment, is one of mine transport equipment throat, drag conveyor belt with a complex and diverse forms of technology, currently the main drag of Frequency Control, but most of the traditional exchange of drag is a two-level inverter. Although it can meet the needs of mine, but as the coal mine production capacity and further improve the automation level, it calls for a gradual update the existing inverter device. To achieve energy conservation and farther reduce the torque ripple and motor starting currents and other purposes. The current high-voltage large-capacity multi-level inverter the more traditional two-level inverter with the device in terms of low voltage requirements, the overall control performance, the output harmonic content is less, there is no direct series switching devices are generated pressure etc., thus the field of high voltage AC variable speed high-capacity has been widely used.In this paper for a typical diode clamped three-level inverter and induction motor mathematical model of a unified analysis. The stator coordinate system of the mathematical model of AC motor control motor flux and torque, to discuss the distribution of space voltage vector on the mid-point potential balance issues focus. Introduced a three-level inverter and induction motor direct torque control principle for the three-level direct torque control technology needed to solve the high voltage jump and the balance between the mid-point potential, proposed a kinds of vector control based on virtual synthesis scheme.By the traditional single vector control program with the improved comparison of the virtual vector control program, using Matlab/Simulink software from simulated to verify the feasibility. The motor speed to achieve real-time and stable operation. Using the TMS320F2407 DSP chip to control the three-level inverter induction motor control system. Experiments confirmed that the balance of the mid-point potential was well suppressed to avoid the high voltage jump. The results prove that the three-level inverter in the coal mine belt conveyor drive system is feasible.Figure [63] Table [17] Participation [33]...