Research On The Drive System Of Mining Locomotive Haulage Controled By The Stator Flux-oriented Vector Control Based On Neutral Network

The mining locomotive haulage is an important conveyance underground coal mine. The traditional mining locomotive haulage usually takes the DC motor for its power source. Its velocity modulation methods mainly are the series-wound resistance method and the DC chopper method. Along with the statement of the high-powered AC velocity modulation technology and the rapid development of the electrical-electronics technology, the AC electricity transmission is also becoming same as the DC electricity transmission on the velocity modulation performance. On the contrary, the AC Asynchronous Motor has simple structure, sturdy and durable, and it has an advantage of saving power by not using resistance when it was used in speed control. Comparing the DC speed regulating system and the AC speed regulating system, we could find the latter has the advantages of low cost, high reliability, good speed adjusting performance, good maneuverability and high security. So, it's an inevitable trend that the DC speed regulating system would be substituted by the AC speed regulating system in the field of the mining locomotive haulage.In operation, the mining locomotive haulage not only works in frequent starting, breaking, accelerating and decelerating conditions, but it has to adapt to the bad pavement, according to the above reasons, AC speed regulating system must have the characteristic of fast response and high overload capacity. According to the operation features of the mining electric locomotive, a new AC speed regulation system, which name is Stator flux-oriented vector control, was introduced in this paper. The new system was not only able to response the speed order and the torque order quickly, but implement torque's smooth transition, and prevent the wheel slipping. In vector controlling, the rotation angle precision of vector would affect the stability of the whole system. Motor's parameters would change with the temperature increasing, which will influence the estimation of vector angle. The vector control of stator flux is based on stator flux linkage, which was used to estimate the vector angle, so the precision of vector angle was only affected by the stator resistance, and the value of stator resistance was easy to be measured in motor parameters. The way of using neural network as the feedback signals in the stator vector control, was able to relief calculation burden of DSP, accelerate the response speed, and improve the stability for system.In order to verify the system's performance, a simulation model was built base on the neural network. The simulation results showed that the new stator vector control system has good performance, and was able to be used in the mining locomotive haulage. Finally, the design idea of hardware-software, based on the TMS320F2812, was given in the paper.