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Start-Up Simulations for Induction and Synchronous Motor Driven Compressor Trains

[+] Author Affiliations
Anand Srinivasan, Peter Weber

Cameron Process & Compression Systems, Buffalo, NY

Paper No. DETC2011-47672, pp. 903-910; 8 pages
doi:10.1115/DETC2011-47672
From:
  • ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 1: 23rd Biennial Conference on Mechanical Vibration and Noise, Parts A and B
  • Washington, DC, USA, August 28–31, 2011
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5478-5
  • Copyright © 2011 by ASME

abstract

3-phase motors (both induction and synchronous) have remained the workhorse of the turbomachinery industry for several decades now. It is well known that motor driven centrifugal compressors give rise to transient torques during start-up of the drive train. The torsional nature of the shaft torques necessitates a thorough analysis at the design stage in order to adequately size the mechanical components of the drive train. This paper summarizes the mathematical equations to predict the air-gap torque for induction and synchronous motors that are available readily from electrical engineering literature, and extends it to present the electro-mechanical equations of motion for the motor-compressor system. Drive train studies have been simulated for both the traditional across-the-line start voltage systems and a simplified version of the more modern soft-start (variable frequency drive) systems.

Copyright © 2011 by ASME

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