The Research On Four-motor Independent Driven Wheeled Bulldozer

Bulldozers is an important equipment of construction machinery,have an irreplaceable role.As the operating load changes frequently,the traditional drivelines structure show low power-utilization,poor emissions,high fuel consumption,To change the fuel-economy,reduce emissions,according to the successful application of electric drive technology in commercial vehicles,electric-drive technology is the best way to improve the fuel economy of bulldozers.Conventional bulldozers are usually crawler bulldozers,yet in some cases,flexible wheeled-bulldozers play a remarkable role.This paper mainly studies the powertrain matching problem of four-motor independent wheeled-bulldozers.The conventional wheeled bulldozer usually consists of two driving wheels,in order to improve the adhesion of wheeled bulldozers,the article uses four-wheel drive mode.In order to analyze the operating characteristics of the four-wheel wheeled bulldozer,it is an important to establish the precise dynamic model.First analysis of the current structure of the electrical powertrain,taking into account the actual situation of bulldozers,determine the AC-DC-AC drive mode,and calculate parameter.Secondly,analysis the kinematics and dynamics of the wheeled bulldozer,and establish the foundation of the linear driving dynamics model and the steering dynamics.By comparing different types of engines,generators,drive motor and,complete selection.According to the engine characteristic curve and the efficiency MAP of the permanent magnet generator and the permanent magnet AC motor,then carried out the precise parameter matching,and complete the simulation module of the electric-drive wheeled bulldozer by Matlab/Simulink.In this paper,I mainly study the key performance parameters matching of the electric-drive bulldozer,which provides a reference for the development of the electric drive type bulldozer.