Engine Cooling Fan Noise and Vibration Problem Caused by a Switching Power Supply 2003-01-1672
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.
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. Download Citation
Author(s):
Wei Wei, S. Hamid Ghoreishi
Affiliated:
DaimlerChrysler Corporation
Pages: 6
Event:
SAE 2003 Noise & Vibration Conference and Exhibition
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Fans
Noise
Vibration
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