| According to the actual circumstance of the coal mine, analyzed the relation of ventilation quantity of the auxiliary fan and variety of gas consistency in the driving drift, this thesis introduces with the DSP chip TMS320F2407 as its control core, combining the fuzzy control algorithm, applying the control strategy of the voltage space vector quantity modulation (SVPWM) to realize super-speed dynamic response. Using lesser hardware support and realizing the complicated control circuit with the software, the thesis designed a high-performance frequency control system. The system can calculate result quickly, then conducting comprehensive comparison, analysis, and judgment, outputting the optimum selection finally. It can make a diagnosis to result and alarm when it discovers the fault. It attains the purpose of energy conservation, wind conservation and reducing wastage as well as ensures safety in production of the coalmine.The paper deduces in details the voltage space vector pulse width modulation (SVPWM) technology and analyzed the principle of operate of the system completely. After introduced the hardware design of system, it exploder software of DSP in the flat of MCK2407 evaluation board.The paper introduced the debugging of program and listed program flow diagram partly. Finally, we designed the electricity model of frequency control using MATLAB software and obtained simulation waveform of anticipated effect.The whole system made mine auxiliary fan work in the safety and economy condition by monitoring gas consistency. It reduced human factors because of improper and inopportune adjusting, as well as increased automation degree and safety of mine auxiliary fan. It economized mass electric energy and adjusted air quantity of the driving drift in reason and makes fresh wind enough on time offer to driving drift in need urgently. It changed the traditional drawing out methane method of the auxiliary fan by manual control and reduced accident rate of gas. |
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