Industrial Electric Motor Bearings — Why Choose MS Bearing?
MS Bearing is a Chinese manufacturer specializing in Industrial Electric Motor Bearings bearing solutions including shaft-currents,variable-frequency-drive-motors,bearing-electrical-erosion,bearing-insulation,stray-currents. Same quality as international brands (SKF, NSK, FAG), at a lower price. High-performance industrial electric motor bearings, offering precision and durability for heavy industrial applications. ISO 9001, factory prices, global shipping from MS Bearing.. We supply bearings for everyday industrial applications. Contact us for specifications and bulk pricing.
Shaft Currents and Electrical Discharges in Variable Frequency Drive Motors
Stray currents that pass through bearings occur in variable frequency drive (inverter) motors. These currents cause electrical erosion — micro-melting on the surfaces of raceways and rollers.
Causes of Current Occurrence
- Induced currents from pulse-width modulation
- Static electricity
- Improper grounding
- High-frequency interference from the converter
Solutions
Bearings with electrical insulation are used: ceramic coating on the outer ring or ceramic rollers. Bearings with an aluminum oxide insulating layer are employed. Installation of current-collecting rings and shaft grounding is recommended.