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Engine Cooling Fan Noise and Vibration Problem Caused by a Switching Power Supply
Technical Paper
2003-01-1672
ISSN: 0148-7191, e-ISSN: 2688-3627
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English
Abstract
A 50 Hz Solid-State Relay (SSR) was used to provide pulse-width-modulated power to engine cooling fans for continuous speed control, to reduce airflow noise and improve efficiency. However, this caused the cooling fans to vibrate at the switching frequency and harmonics, thus degrading vehicle NVH performance. This paper describes the problem associated with SSR- powered cooling fans, including root-cause analysis, and identification of areas sensitive to vibration affected by the switching power supply. Based on our analysis, we found several solutions to the problem. Our production solution and some generic recommendations for shroud design are presented in the paper.
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Citation
Wei, W. and Ghoreishi, S., "Engine Cooling Fan Noise and Vibration Problem Caused by a Switching Power Supply," SAE Technical Paper 2003-01-1672, 2003, https://doi.org/10.4271/2003-01-1672.Also In
References
- Bartlett B. Mugan S. “Passenger vehicle noise and vibration harshness relative to engine fan cooling module” C496/072 ©IMechE 1995, Vehicle Thermal Management Systems Conference Proceedings
- Chanfreau M. “Electronic Fan System Strategies and Statistical Life Test Method/Mission Profile” SAE paper 2001-01-0967
- Perset D. Jouannet B. “Simulation of a Cooling Loop for a Variable Speed Fan System” SAE paper 1999-01-0576