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A Variable Speed Fan With Counter-Rotating Impellers for Low-Noise ECLS in Manned spacecraft
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English
Abstract
A new type of high efficiency and low-noise fan for space applications has been tested. It basically consists of two counter-rotating axial impellers, each driven by a brushless DC motor controlled by variable speed electronics. The underlying concept is the tip speed reduction (compared with a conventional fan type) achievable uniquely with counter-rotating impellers and which translates into reduced noise. Additional new features include electronic circuits for motor torque ripple control and motor phase commutation without rotor position sensors. Preliminary tests showed high efficiency and fairly low noise.
Citation
Pavarani, A. and Savage, C., "A Variable Speed Fan With Counter-Rotating Impellers for Low-Noise ECLS in Manned spacecraft," SAE Technical Paper 891532, 1989, https://doi.org/10.4271/891532.Also In
References
- Eilers D. Wyn-Roberts D. Borchers T.U. “Audible Noise Control in Space-lab - as Part of Manned Spacecraft Environmental Control” Proc. of Spacecraft Thermal & Environmental Control System Symposium Munich 1998