#vfdproblems

Many industrial motors fail quietly over time. Proper motor maintenance can prevent hidden electrical problems that damage your motors and reduce their lifespan.

High dv/dt stress: Damages motor insulation over time.

Bearing currents (EDM): Silent bearing pitting & early failure.

Poor grounding & earthing: Creates circulating currents.

Long motor cable length: Causes reflected wave overvoltage.

Wrong switching frequency: Extra heat & insulation breakdown.

Non-inverter-duty motor: Not designed for PWM stress.

Phase imbalance from supply: Uneven torque & overheating.

Harmonic distortion (THD): Increases copper & iron losses.

Common EMI symptoms in VFDs:

Unexpected trips

Data or signal glitches

Loss of communication between VFD and PLC

Fix it with:

✔️ Shielded control cables ✔️ Proper grounding techniques ✔️ Smart cable routing to avoid noise

Don't let EMI disrupt your operations. At Riyadh Al Etqan Co., we help industrial teams diagnose, fix, and prevent EMI-related VFD failures.

Save this tip for your next maintenance checklist.