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Considerations when repairing a Two-Pole (3600 RPM) Electric Motor

12/16/2020

Two-pole motors can be more challenging to repair because of the vibration issues that can be related to the units operating at higher speeds, which means there are special tests that need to be performed on them. Without checking characteristics such as runout and roundness, there is a chance that vibration won’t show up until you get your two-pole induction motor back and running.

Here is a Quick Review of Two-Pole Motors

Two-pole induction motors are just like other induction motors but they operate at 3600RPM versus 1800RPM, 1200RPM, or even slower. These motors are most often found in applications that need higher speeds such as conveyor belt systems, pumps, and air compressors.  And the major issue with two-pole motors involves two things: speed and vibration.

At 60 Hz, a two-pole induction motor will operate at a synchronous speed of 3,600 rpm. At those speeds, everything is amplified, which means there are tighter tolerances involved for bearings, shafts, housing fits, etc. Any dimensional variations or frame distortions will play a significant role in how these motors perform.

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