小型空调机组中与风扇叶轮、电机和电机安装组件相关的振动模式可由单相电机中的电机转矩脉动激发。开发了实验程序，可用于测量螺旋桨风扇组件的固定部件（电机定子和电机安装组件）和旋转部件（风扇叶轮和电机转子及轴组件）的扭转共振频率。本文介绍了冲击试验程序、将风扇电机设置为扭振器的试验程序，以及在消声室中使用麦克风的试验程序。 单位:双引文:研讨会，ASHRAE交易，1998年，第104卷，pt。1A，旧金山

Vibration modes associated with a fan impeller, motor, and motor mounting assembly in small air-conditioning units can be excited by motor torque pulsations in single-phase motors. Experimental procedures were developed that can be used to measure the torsional resonance frequencies of the stationary parts (motor stator and motor mounting assembly) and the rotating parts (fan impeller and motor rotor and shaft assembly) of a propeller fan assembly. Impact test procedures, test procedures in which the fan motor is set up to act as a torsional shaker, and procedures that employ the use of a microphone in an anechoic room are presented in this paper.Units: Dual