关键词: 轮毂电机；角模块；键合图；多物理场耦合；MATLAB/Simulink

Abstract: In order to better explore the multi-physics coupling characteristics of the in-wheel motor angle module system during operation and solve the difficult problem of heat dissipation of in-wheel motors in limited space, based on the bond graph theory, the multi-physics coupling model of the in-wheel motor angle module system is established, and export the mathematical model. Use MATLAB/Simulink for dynamic simulation, analyze the output torque and temperature characteristics of the in-wheel motor under the action of multi-physics coupling. The simulation results show that using water cooling mode has obvious cooling effect on stator winding. For different channel cross-sectional dimensions and coolant flow rates, the in-wheel motor presents different temperature rise characteristics. Under the same motor operating conditions and coolant flow, increase the water channel the inner diameter can achieve better cooling effect. Using the finite element analysis software Fluent for fluid simulation, the obtained motor temperature distribution cloud map and temperature change curve are basically consistent with the above conclusions, which verifies the practicability and reliability of the coupled model, and provides a theoretical reference for the design and application of the in-wheel motor angle module system.

Key words: In-wheel motor; Angle module; Bond graph; Multi-physics coupling; MATLAB/ Simulink