Design of Integrated Axial Fan for Communication Equipment

doi:10.11985/2020.01.009

Abstract

Abstract:

Low voltage axial flow fans are widely used in the heat dissipation system of electronic equipment. The fan is usually required to be small in volume, large in air flow and integrated speed regulation. A 12 V permanent magnet brushless axial flow fan is designed for server cooling system applications. First, the fan blade, permanent magnet brushless DC motor and sensorless controller of axial flow fan are designed. The fan blade adopts 8-piece C4 airfoil, the motor adopts 4-machine 8-slot external rotor permanent magnet brushless dc motor, and the tooth groove torque and heat dissipation distribution of the motor are studied. The controller adopts sensorless square wave control and three-stage starting technology. Then, ANSYS finite element software is used to analyze the structural strength and mode of the axial flow fan. Finally, the axial flow fan is manufactured and the experimental platform is built. The performance of the fan controller, mechanical characteristics of the motor, wind pressure and flow rate of the fan blade are tested. Experimental results verify that the rated output torque and speed of the motor meet the requirements which the efficiency reaches 92%, and the fan blades meet the wind pressure and air volume required by the operating point.

Key words: Axial flow fan, cooling system, brushless DC motor, position sensorless

CLC Number:

U469

HUANG Qi,HU Bin,KANG Le,SUN Jinliang. Design of Integrated Axial Fan for Communication Equipment[J]. Journal of Electrical Engineering, 2020, 15(1): 62-70.

Figures/Tables 18

References 10

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参数	数值	参数	数值
极槽配合	4极6槽	槽满率(%)	40
冲片材料	20WTG1500	磁钢Hc/(kA/m)	340
每槽导体数	40	磁钢厚度/mm	1.5
漆包线径/mm	0.4	极弧系数	1
并绕根数	2	转子磁轭材料	Steel_1010

实测值			计算值
直流电源	电动机	发电机	损耗	轴功率	扭矩	电机效率
P₀/W	P₁/W	P₂/W	Ps/W	P_T/W	T/(N·m)	η(%)
24.5	22.5	18.5	2.0	20.5	0.013 1	91.3
30.1	27.8	23.2	2.3	25.5	0.016 2	91.7
32.9	30.1	25.5	2.3	27.8	0.017 7	92.3
36.9	35.1	29.7	2.7	32.4	0.020 6	92.4
40.1	38.4	32.4	3.0	35.4	0.022 5	92.2

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