In-wheel Motor Design And Power Matching Of Heavy-duty Trucks

Compared with passenger cars,which are rapidly transforming to new energy,heavyduty trucks with a small proportion of the market share and serious emission and pollution problems are far slower than passenger cars.Moreover,the drive system structure of the currently developed new energy heavy-duty trucks is mainly based on centralized electric drive,and there are fewer products with distributed drive structure driven by in-wheel motors.Compared with heavy-duty trucks with centralized electric drive structure,heavyduty trucks driven by in-wheel motors have the advantages of high efficiency and flexibility,and will be the main development direction of new energy heavy-duty trucks in the future.This thesis will take the heavy-duty truck driven by dual drive axles and four in-wheel motors as the research object.According to the basic design parameters of the vehicle and the power and economic indicators,the power system matching research of the heavy-duty truck driven by in-wheel motors and its performance will be carried out.The in-wheel motor design research aims to design a pure electric heavy-duty truck with good power and low energy consumption.Firstly,based on the power matching method and theory of pure electric vehicles,according to the whole vehicle’s parameters and performance index of wheel hub motor driven heavy-duty trucks,the performance indicators and power battery requirements of a single in-wheel motor are calculated and analyzed.A wheel motor with peak power of 130 k W and peak torque of 2200 Nm for heavy-duty trucks with wheel reducer was designed and the structure of the wheel motor and its wheel reducer was completed.According to the theory of electromechanics and electromagnetics,combined with the performance indicators and technical requirements of the in-wheel motor,the main dimensions and winding scheme of the in-wheel motor are designed.The in-wheel motor is designed and simulated by ANASYS Maxwell simulation software,and the no-load magnetic field distribution is analyzed to verify the parameter design of the motor is reasonable.And the external characteristic curve of the motor and the efficiency map are simulated.Finally,using AVL-Cruise simulation software to build a vehicle model of the heavy-duty truck driven by in-wheel motor.The power and economy of the vehicle are simulated to verify the correctness of the power system matching of the in-wheel motordriven heavy-duty truck and the correctness of the in-wheel motor design.and reasonableness.This thesis can provide some experience for the development of new energy heavy-duty trucks,especially the research on in-wheel motor-driven heavy-duty trucks based on distributed drive structures.