Browsing: dielectric strength

This article provides a technical analysis of bearing insulation thickness, explaining how coating depth impacts breakdown voltage and parasitic capacitance. It compares Standard (100µm) vs. Enhanced (300µm) specifications and evaluates the mechanical and thermal limits of ceramic coatings in high-voltage applications.

This technical article defines bearing dielectric strength, distinguishing it from breakdown voltage, and analyzes the performance differences between plasma-sprayed coatings and hybrid ceramic balls. It also explores critical testing standards like ASTM D149 and environmental factors like humidity that degrade insulation performance in VFD applications.

This article demystifies the science of electrical discharge machining (EDM) in VFD motors, explaining how bearings act as capacitors and how insulation effectively blocks the destructive bearing electrical arcing that leads to raceway fluting and failure.

This article analyzes the physics behind bearing insulation breakdown voltage, detailing seven critical variables—from ceramic coating thickness and porosity to environmental humidity and PWM stress—that determine the safety and reliability of VFD motors.

Plasma spray coated insulated bearings use Aluminum Oxide ceramic coatings applied by APS technology to provide high dielectric strength and long-term electrical protection in VFD-driven systems.

This technical analysis explores electrical pitting in VFD-driven motor bearings, explaining how shaft voltage creates microscopic erosion that can progress to catastrophic failure. It details methods for distinguishing electrical discharge damage from mechanical wear and outlines proven prevention strategies, such as shaft grounding rings and insulated bearings, to ensure long-term reliability.

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.

How They Work, Why They Ma…