Research On The Vector Control System Of Electrical Wheel Mine Truck

Mining Truck is widely used in the mine mountain and the construct engineeringof large water with large traffic volume and high productivity. Electric drive systempopularity is justified by several advantages over mechanical drive system, just asless moving parts and convenient control.This paper focuses on the research of the wheel motor controller, which is aimportant part of the AC driving system. Because of the special working condition ofthe Mining Truck, special requirements of the control system are needed. Based onthe analysis of mathematical models of asynchronous motor in different coordinatesystem, the improved vector control system for Mining Truck is introduced in thispaper. The design technique of the PI regulators is also introduced in this paper.For Mining Truck, sometimes the wheel motor has to work above therated speed and still the good torque output ability is needed for the heavyload on the Mining Truck. Therefore, this paper also deals with anotherimportant part of the improved vector control system, the field-weakeningcontrol. The optimal field-weakening control strategy is mainly discussedbased on both the voltage and current limit in the system. By solving theoptimal equation of the output torque, this strategy can make the motor havethe maximum torque output ability theoretically. A novel flux weakeningmethod based on MPC is proposed in this paper, the implementation processof the proposed method is described in detail.This paper also describes the hardware and software structure of thewhole system. Experiments were done based on the wheel motor controllerand2.2kW motor test bench. The results proved that the vector control andfield weakening strategies are suitable for Mining Truck.