Noise Emission of Universal Motor Drives

Flexural and transverse vibrations from static and dynamic components of tensioning forces in belt driven systems can cause changes in the noise radiation from the universal motors of clothes washers. This study describes a successful effort to analyze the effect of tensioning forces on noise emission of the drive system. The data show that principal parameters of tensile forces can cause parametric excitation of transverse and flexural vibrations resulting in a considerable change in the noise emissions of universal motors. Using the correlations for validation and recovery of distorted vibration and acoustic data, optimum tensioning forces, hence quieter operation of the universal motor, can be achieved.