Precise Vibration Measurement with Mechanical Load Isolation for Sub-Fractional Horsepower Motors

With the growing use of electric motors as the primary propulsion system in vehicles, vibrations from the main drive have decreased, making vibrations from auxilia-ry drives more noticeable. As a result, addressing audible noise and vibration in the design of auxiliary motors for automotive applications has become increasingly important. These compact drives, often located near the passengers, are more audible compared to the main drive system. Consequently, they can produce vibrations that may excite neighboring structures or components, leading to noise-related concerns. Accurately measuring the structure-borne noise of permanent magnet (PM) motors presents a significant challenge. This paper introduces an innovative approach to enhance vibration measurement precision and differentiate between electromagnetic and mechanical sources of vibrations, making it suitable for sub-fractional horsepower motors' vibration measurements and analysis.