Rotor & Stator Testing

Continuity with minimum resistance should be noted between slip rings. See Fig 1. No continuity should exist between either slip ring and rotor core or shaft. See Fig 2. Stator conduction is normal when there is continuity between leads of stator coil. See Fig 3. Stator conduction is NOT normal between stator coil leads and stator core. See Fig 4.

Fig 1: Rotor Coil Continuity Test

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Fig 2: Rotor Coil Ground Test

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Fig 3: Stator Coil Continuity Test

Fig 4: Stator Coil Ground Test