Research Of Mine-used Electric Vehicles Drive Systems Based On PSMSs

Mine-used electric vehicles an important conveyance in mines production. With the development of electronic technology and control theory, the field of mine-used electric vehicles drive control system was gradually driven by DC motor or Asynchronous Motor into PMSMs. Permanent-magnet synchronous machines(PMSMs) are widely used in industrial applications owing to their distinctive advantages, such as high efficiency, high power density, high output torque and high power factor as compared to the DC motors and induction motors (IM). So, PMSMs had been got more and more widely used in the field of mine-used electric vehicles drive control system.Aiming at the design requirements for mine-used electric vehicles drive control system, the article proposes the PSMS control system based on high-performance field oriented control. And one goals of the researth for the dissertation is to develop a rotor positon/speed sensorless control system with performance comparable to the sensor-based control systems for PMSMs.Firstly, on the basis of the analysis of mathematical model on the three coordinate systems and coordinate transformation of the three-phase PMSM, the model of a generic PSMS can be written in the dq rotor reference frame. To achieve both high efficiency and high performance of the drive control system, high-performance field oriented control theory is presented.Secondly, a new mathematical model for PMSMs is proposed and an extended EMF is defined.The EEMF contains the position information of not only in the conventionally defined EMF but also in the stator inductance. This makes it possible to obtain the rotor position and velocity by just estimating the EEMF. A unified sensorless control method for all the synchronous motors at high speeds becomes possible.On the basis of theoretical analysis, a simulation model of the PMSM electric vehicle drive system is established in MATLAB. Through the analysis of the simulation results, the correctness of the control algorithm is verified. Finally, a rational design of hardware and software parts is carried out. The research of mine-used electric vehicles drive control system is accomplished. Through the whole article, the study prepose the position-speed sensorless control method of the PMSMs as the mine-used electric vehicles drive control system. The demands of the task is to reduce system complexity and obtain the excellent dynamic performance and speed stabilized accurancy.