电机双风扇串联运行特性的分析

Analysis of running characteristics of a dual-fan motor

风扇是电机冷却系统的主要散热部件,直接影响着电机的温升、寿命和可靠性。一般情况下,仅在电机轴的单侧安装一个风扇。为了进一步提高电机冷却散热的性能,提出一种双风扇串联运行的方案。在分析电机内部通风冷却系统结构的基础上,建立其内部风阻与风压之间的数学表达式,得到适合串联运行的风扇尺寸,并利用仿真软件验证了此方案的可行性。仿真结果表明,该方案提高了风压,改善了电机的冷却性能,为高功率密度电机冷却系统的设计和应用提供了理论依据。

The fan is the main heat dissipation component of motor cooling system,which directly affects the temperature rise,life and reliability of a motor.Generally,only one fan is installed on one side of the motor shaft.In order to further improve the cooling and heat dissipation performance of the motor,a scheme of double-fan series operation is proposed in this paper.On the basis of analysis of the ventilation and cooling system structure of the motor,a mathematical expression of its internal wind resistance and wind pressure is established,and the size of the fan suitable for series operation is obtained.The feasibility of this scheme was verified by simulation software.The simulation results show that the scheme improves the wind pressure and the cooling performance of the motor,and provides a theoretical basis for the design and application of cooling systems for high power density motor.