Improvements on permanent magnet synchronous motor by integrating heat pipes into windings for solar unmanned aerial vehicle  

作　　者：Chengming Zhang Xintong Zhang Fei Zhao David Gerada Liyi Li 

机构地区：[1]Harbin Institute of Technology,China [2]University of Nottingham,England

出　　处：《Green Energy and Intelligent Transportation》2022年第1期92-103,共12页新能源与智能载运（英文）

基　　金：the Natural Science Foundation for Outstanding Young Scholar[grant numbers 52122704];the National Natural Science Foundation of China[grant numbers U2141224 and 52077044].

摘　　要：The successful market uptake of all-electric propulsion systems is closely related to the performance metrics of the electrical motor used within.In light of this,various road-maps have been set for the next two decades by aerospace and automotive bodies targeting ambitious future targets of the motor's power densities and efficiencies.In achieving motors with such step-improvement performance metrics,often the thermal management is a key challenge.In this paper,a cooling structure for a propulsion motor of solar unmanned aircraft is proposed which combines the stator windings with heat pipes,and which is shown to simultaneously improve the heat dissipation as well as the efficiency.This paper firstly determines the heat transfer characteristic of the heat pipe experimentally which is then used in the development of a bespoke thermal network model of the motor.The effects of the cooling structure on the motor's temperature rise,copper losses,torque,and efficiency are studied in detail.Finally,a prototype is developed and a test platform is built.The experimental results are consistent with the analytical result,verifying the correctness of the thermal network model and the benefits of the proposed mechanism.Compared to the motor without heat pipes,the temperature rise of the motor is reduced by 35%,while its efficiency is improved by a significant 1.5%.

关 键 词：All electric propulsion Direct drive motor Efficiency improvement Thermal optimization Heat pipe 

分 类 号：TM341[电气工程—电机]