Browsing: circulating current

This guide defines stray current in motors and explains its link to VFD operation and shaft voltage buildup. It details the resulting damage—such as electrical pitting and fluting—and provides actionable mitigation strategies, including shaft grounding rings and hybrid ceramic bearings, to extend motor reliability.

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 guide explains how to diagnose VFD-induced bearing damage in industrial fans and select the correct insulated bearings to prevent electrical erosion and vibration.

This buyer’s guide explains the critical role of insulated bearings in protecting VFD-driven motors, comparing the technical benefits of Plasma-Coated versus Hybrid Ceramic solutions and detailing best practices for installation (DE vs. NDE) to prevent circulating currents.

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.

In modern electric motors—…

Electric motors—especially…