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Browsing: Electrical Erosion
This category focuses on electrical erosion and bearing damage mechanisms, including fluting, pitting, EDM, and the sources of shaft voltage in motor systems. Articles explain how high-frequency currents and VFD drives contribute to electrical wear, helping engineers better diagnose and prevent premature failures.
This technical guide explores the mechanics of EDM bearing damage (electrical erosion) caused by stray shaft voltages in VFD applications. It outlines critical symptoms such as fluting and pitting, while offering proven prevention strategies like insulated bearings and shaft grounding rings.
This technical analysis explores how VFD-induced common mode voltage and parasitic capacitance create destructive shaft currents (EDM) that lead to premature bearing failure, while offering engineering solutions like grounding rings and hybrid ceramic bearings for mitigation.
This technical guide defines bearing fluting and its connection to VFD-induced electrical currents. It explains how to distinguish the shiny “washboard” pattern from mechanical false brinelling and details prevention strategies, including shaft grounding rings and insulated bearings, to stop premature motor failure.
This comprehensive guide defines electrical erosion in bearings, explaining how VFD-induced currents cause pitting and fluting. It outlines practical inspection methods and details prevention strategies—such as shaft grounding and ceramic insulation—to protect industrial motors.
This diagnostic guide details how to distinguish VFD-induced electrical bearing damage from mechanical failure through visual inspection of fluting, vibration analysis, and shaft voltage testing.
This technical analysis explains how VFD switching creates destructive high-frequency bearing currents, detailing the difference between EDM and circulating currents, and offering mitigation strategies like proper grounding and insulated bearings.
This comprehensive guide explains the origins of motor shaft voltage in VFD applications, outlines methods for accurate measurement using oscilloscopes, and compares mitigation strategies like grounding rings and insulated bearings to prevent failure.
This technical guide explains the destructive physics of “microwelding” caused by electrical arcing in bearings, detailing how VFDs and improper grounding melt raceways and how to prevent this damage.