Comparative Analysis of Round/Flat Copper Wires for Aero-start Brushless DC Motors
Aeronautical starter motor is characterized by high efficiency,harsh working environment and high power density,which is the core component of aero-engine starter,but due to its harsh and changeable work-ing environment and high performance index requirements,there is an urgent need to study the performance of aeronautical starter motor.This paper firstly established a 6-pole and 18-slots round wire motor A model to get its performance index,and then established flat wire motor B to make its volume the same,and analyzed its performance index under the same excitation source;Due to the strict limitation of aerospace starter motor mounting space,this paper established a flat wire motor C model based on circular wire motor A,which has a smaller volume while achieving the output performance of circular wire motor A.At the same time,through Motor-CAD software,thermal simulation of the three types of motors were carried out to obtain the results of their temperature rise distribution.The results show that:the output torque of the round wire motor is 7.11Nm,and the rotational speed is 7120r/min,while under the same volume,the output torque of the flat wire motor is 7.76Nm,and the rotational speed is 7000r/min,which is a substantial increase in the torque compared with that of the round wire motor;the flat wire motor C,with a reduction of 6mm in the outer di-ameter of the stator,and a reduction of 1mm in the length of the stator,is still capable of outputting the same torque as the round wire motor A;The power density of the flat wire motor is improved compared with that of the round wire motor;the temperature of the flat wire motor B is not reduced much compared with that of the round wire motor A,but the maximum temperature rise of the flat wire motor C is reduced by 16.9℃com-pared with that of the round wire motor A.
aviation starter motorflat wire motorround wire motorfinite element analysis
万方数据
维普
