Richard Hughes (deceased)
Pump & Motor Works, Inc.

Proper testing of a synchronous motor is crucial for validating repair, reconditioning or remanufacture. There are several types of synchronous motors and a brief description of each will be given prior to discussing testing.

Topics discussed are:

• Brush type motor
• Watch for resistance value extremes
• Brushless motors
• Performing insulation resistance test
• Performing AC voltage drop test

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