Study Of Mine Battery Locomotive Intelligent Speed Control System Based On SRM

Currently, most mine-used battery locomotive use DC motor drive. Due to the use of the commutator and brush caused mechanical wear and spark generation of DC motor, making the DC motor failure increasing, low reliability, short life and maintenance workload. Besides, the traditional way of serial-resistance speed-regulation lead to energy wasted on speed resistor so that makes the overall efficiency decreasing of the vehicle. Switched reluctance motor (SRM) is a new motor which developes in recent decades. This kind of motor has the characteristics of simple structure, rugged, reliable, flexible control, and good speed performance. In addition, the motor has both rugged of AC variable and has a good controllability of DC speed control system. It is believed that using the switched reluctance motor in mine-used battery locomotive will have a good prospect.This paper mainly analyzes the application status of existing mine-used battery locomotive and proposed a new intelligent mine-used battery locomotive speed control system design based on SRM against the current disadvantages including SRM intelligent speed control system based on direct torque control. The paper explores the SRM without position sensor rotor position detection scheme based on cerebellar model articulation controller (CMAC), designs the system hardware circuit and gives a basis of selection for relevant device. This paper focuses on two aspects:Firstly:Aiming at the problem of higher torque ripple of SRM with the traditional control strategy, designs SRM intelligent speed control system based on direct torque control combined with the principle of direct torque control, analyzes the adjustment process of SRM stator flux, focuses on the normalized representation of the stator flux and space voltage vector in the α_β coordinate system of and uses PID closed loop speed regulation. The paper analyzes,campares and researches various state responses by matlab simulation.Secondly:Aiming at the traditional SRM rotor position detection system prone to damaged underground that leads to the locomotive issue of regular maintenance, combined with CMAC theory gives the scheme of the SRM without position sensor rotor position detection scheme based on CMAC and focuses on the structure of SRM rotor position detection system of CMAC model. Meanwhile, using CMAC fit electromagnetic relationship of SRM to realize getting the real-time rotor position by entering the phase flux and phase current and contrast the error of various given speed by experiments of matlab as well as the relevant analysis.The experiments showed that:the SRM intelligent speed control system based on direct torque control have the fast response no matter in the situation of a given speed sudden increasing and decreasing, a given torque the sudden increasing and decreasing etc..Moreover, it’s greatly superior to the traditional control methods in the effect of torque ripple minimization. Simulation results show that the SRM intelligent speed control system based on direct torque control has fast dynamic response speed and robustness.