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A low-cost core test setup for small stators

Publication date: 
May 2017
Author(s): 
Mike Howell, EASA Technical Support Specialist
Type of media: 
Article

The two primary reasons for performing stator core testing in the service center are (1) to verify that the stator core is acceptable for continued use and in the event of a rewind, (2) to verify that the repair process has not adversely changed the stator core condition. This testing can be done using a commercial core loss tester or a manual loop test using an appropriate AC source, cables and meters. Some typical reasons a manual loop test may be performed are: 

  • customer or service center preference / specs 
  • commercial core loss tester not available 
  • stator size is inappropriate for available commercial core loss tester 

Additionally, some service centers have forgone core loss testing on small stators for various reasons including difficulties with test configuration, calculations, cost or even appearance. The purpose of this article is to explore a low-cost test setup for loop testing small stators.

Topic(s): 
AC motors
Stators/windings
Repair procedures and tips
Service center equipment
Motor testing