This guide explains the origins of shaft voltage in VFD applications, the risks of electrical erosion, and practical strategies—including grounding and insulation—to protect motor bearings.
This guide outlines the critical steps for OEM engineers to correctly specify electrically insulated bearings during the design phase, ensuring long-term motor reliability in VFD and high-voltage applications by preventing electrical discharge damage.
This guide explains the root causes of common-mode voltage in VFD applications, details its destructive impact on motor bearings and insulation, and provides actionable engineering solutions for OEMs and end-users.
This engineering guide details the mechanism of VFD-induced shaft currents, explains the damage caused by electrical fluting, and outlines how ceramic-coated and hybrid insulated bearings provide the most effective protection for industrial motors.
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