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Electric Motor Reliability Tip: Reduce Start‑Up Cycles to Protect Your Equipment

During start‑up, electric motors endure significant mechanical and thermal stresses. Rotor bar temperatures rise sharply, stator winding end turns expand, and magnetic attraction pulls the rotor and stator together.

Once the motor reaches a steady operating load, these forces subside, and the machine operates under normal conditions. However, repeated start‑up cycles accelerate wear on the rotor cage and stator windings, potentially leading to catastrophic failure.

If your testing shows a decline in reliability, the most effective countermeasure is to reduce the number of start‑up events. This simple practice extends component life and maintains performance.

For further guidance on electric motor maintenance, visit PdMA Corporation.

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