YFP系列直联式风机水泵用三相异步电动机外型美观、噪声低、振动小，适用于能承受一定轴向力的直联式风机、水泵类等机械。
YFP motors are designed direct coupling with the machines, such as pumps and fans, which have the axial load. The motors are featured with low noise and little vibration.
针对开关磁阻电动机运行的振动和噪声问题，在对开关磁阻电机非线性模型进行分析的基础上，将直接转矩控制方法应用到SRM的控制当中。
As to the problems of operating noises and vibrations, this paper applied the Direct Torque control (DTC) technique to SRM's controlling, based on the analysis of the nonlinear model of SRM.
异步电动机转子偏心会引起一系列低次数径向力波，并使噪声辐射增加。
Rotor eccentricity in asynchronous motor always arose a series of low-order radial force wave and increase noise radiation.
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