Motor Protection

VFD Motor Bearing Failure: Causes, Symptoms, and Solutions

VFDs generate common-mode voltage that induces destructive shaft currents through motor bearings, causing EDM pitting and bearing fluting within months. Learn the complete damage chain and 3 proven prevention methods including shaft grounding rings.

Sungturn Technical Team July 4, 2026 10 min read

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Product Selection

AEGIS SGR Alternatives: Cost-Effective Shaft Grounding Solutions

Looking for AEGIS SGR alternatives? Compare shaft grounding ring options by price, specs, and lead time. Sungturn SGR rings offer AEGIS-compatible performance at 40-60% lower cost with faster delivery and no motor modification required.

Sungturn Technical Team July 4, 2026 8 min read

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EV Motor Protection

Why 800V EV Drive Motors Need Shaft Grounding Rings

As the EV industry shifts to 800V architectures, shaft voltage discharge becomes a critical threat to motor bearing life. Learn the physics behind bearing EDM damage and why shaft grounding rings are essential for reliable EV motor operation.

Sungturn Technical Team May 20, 2026 6 min read

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Product Selection

Nanocrystalline Cores for EMC Filtering: A Selection Guide

Complete selection guide for nanocrystalline cores used in EMC/EMI common-mode chokes for VFD motors, EV chargers, and industrial applications. Learn permeability selection, DC bias handling, and core sizing with real application examples.

Sungturn Technical Team May 10, 2026 8 min read

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Industry Analysis

Bearing Isolators vs. Lip Seals in Petrochemical Applications: A Cost Comparison

Process pump reliability directly impacts plant uptime. This comparison analyzes why bearing isolators consistently outperform lip seals in petrochemical pump applications, with real-world TCO data showing a 5-year cost advantage of 4-13x.

Sungturn Technical Team April 28, 2026 7 min read

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More technical articles coming soon, including:

• How to Select the Right Bearing Isolator for Your Pump
• Shaft Grounding Ring vs Insulated Bearing: Which Is Better?