Your browser does not support JavaScript!
http://iet.metastore.ingenta.com
1887

Eddy currents and wall losses in screened-rotor induction motors

Eddy currents and wall losses in screened-rotor induction motors

For access to this article, please select a purchase option:

Buy article PDF
$19.95
(plus tax if applicable)
Buy Knowledge Pack
10 articles for $120.00
(plus taxes if applicable)

IET members benefit from discounts to all IET publications and free access to E&T Magazine. If you are an IET member, log in to your account and the discounts will automatically be applied.

Learn more about IET membership 

Recommend Title Publication to library

You must fill out fields marked with: *

Librarian details
Name:*
Email:*
Your details
Name:*
Email:*
Department:*
Why are you recommending this title?
Select reason:
 
 
 
 
 
Proceedings of the IEE - Part A: Power Engineering — Recommend this title to your library

Thank you

Your recommendation has been sent to your librarian.

The problem of circulating corrosive liquids assumes a major importance in nuclear-engineering practice, where the standards of safety and reliability which are imposed demand sealed circulating systems. One method employs a completely enclosed centrifugal pump driven by a squirrel-cage induction motor in which the rotor is separated from the stator by a thin cylindrical corrosion-resistant shell which is situated in the air-gap of the machine and effectively forms part of the retaining wall of the circulating system. A precise assessment for design or development purposes depends on a knowledge of the power losses in the stationary shell and it is a solution of this eddy-current problem which is developed in this paper.Arguments more appropriate to field theory than to circuit theory lead to a classical boundary-value problem which takes into account the nature and thickness of the shell and the length of overhang, and provides formulae for current densities, flow lines and dissipated power in terms of ordinary machine parameters and the dimensions and electrical constants of the shell. Theoretical and practical results are compared and shown to be in close agreement. Some of the graphical results display a pronounced slot effect and suggest methods for making a more detailed investigation.The theory can be extended to correspond to a composite shell of complex structure and it has some bearing on the principles employed in drag-cup motors, to which it could be applied.

References

    1. 1)
      • Robinson, R.C., Rowe, I., Donelan, L.E.: `The Calculation of Can Losses in Canned Motors', Paper No. 57–134, Transactions of the American I.E.E., January 1957.
    2. 2)
      • P. Fortescue . The Design of Totally Enclosed Mechanical Pumps. Journal of Nuclear Energy
    3. 3)
      • R.L. Fillmore . Calculation of Eddy-Current Paths in Drag-Cup Induction Motor Rotors. Transactions of the American I.E.E.
http://iet.metastore.ingenta.com/content/journals/10.1049/pi-a.1958.0036
Loading

Related content

content/journals/10.1049/pi-a.1958.0036
pub_keyword,iet_inspecKeyword,pub_concept
6
6
Loading
Correspondence
This article has following corresponding article(s):
Losses in pump induction motors
This is a required field
Please enter a valid email address