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Understanding Electric Motor Bearings by Airton Flores is a document available to read on EtoBox.

What is Understanding Electric Motor Bearings about?

The document discusses bearings and drives, focusing on issues caused by variable frequency drives (VFDs) and their pulse width modulation (PWM) technology. It notes that PWM uses high switching frequencies that can induce damaging voltages on motor shafts and bearings through electrical coupling. Measurements showed shaft voltage spikes correlated with VFD carrier frequency. Solutions proposed include reducing VFD voltage, adding motor shaft grounding, and verifying grounding systems.

Author

Airton Flores

Language

EN