Knowledge Center
Technical articles on shaft voltage, product selection, and installation - written for engineers and maintenance teams.
VOLSUN News
3 posts
Latest news, company updates, and product information from VOLSUN.
Technical Articles
8 articles
Technical articles and application guides about shaft grounding rings, cold shrink tubes, insulation protection, and material solutions.
Frequently Asked Questions
Q&A
Frequently asked questions about VOLSUN products, applications, installation, and customization.
VOLSUN News
- Volsun Wins Recognition in VFD Motor Protection Field (Award News 2026)
Volsun's fiber-based high-conductivity shaft grounding ring received the 2026 Electric Drive Innovation Technology Award, recognizing progress in VFD motor bearing protection.
- Volsun at 2026 Global XEV Drive System Conference
Volsun presented electric drive safety protection solutions at the 2026 Global XEV Drive System Conference in Shanghai, with shaft grounding rings for VFD motor bearing protection among the booth highlights.
- Volsun at EASA 2026 Orlando
Volsun joined EASA 2026 in Orlando to discuss shaft grounding rings, VFD motor bearing protection, and practical reliability strategies with motor repair and OEM professionals.
Technical Articles
- What Causes VFD Bearing Failure?
VFDs improve motor control and efficiency, but shaft voltage and bearing currents can contribute to premature bearing failure. Learn the mechanisms, warning signs, and common mitigation approaches.
- Why Shaft Grounding Ring is the Smarter Choice for VFD Motors
Learn why shaft grounding rings are a smarter solution for VFD motor bearing protection compared with traditional carbon brushes, especially in wind power, industrial motors, and variable frequency drive applications.
- How to Install a Shaft Grounding Ring Correctly | VFD Motor Bearing Protection
Step-by-step installation guide for shaft grounding rings, covering shaft cleaning, fiber contact, grounding, continuity testing, and common installation mistakes.
- Shaft Grounding Ring vs Carbon Brush: Which Is Better?
Compare shaft grounding rings and carbon brushes for VFD motor bearing protection, including maintenance, shaft wear, reliability, cleanliness, and long-term cost.
- What Is Shaft Voltage and How to Prevent Bearing Damage in VFD Motors
VFDs improve control and efficiency, but their switching can induce shaft voltage that discharges through motor bearings. Learn the causes, warning signs, and how shaft grounding rings help.
- Install an Arc-Shaped Shaft Grounding Ring
Installation checklist for arc-shaped shaft grounding rings where access and mounting envelope need review.
- ST/STW vs RD/RDW: Which Shaft Grounding Ring Structure?
Compare arc-shaped ST/STW and solid RD/RDW shaft grounding rings by structure, mounting, and application fit.
- What Causes Shaft Voltage in VFD Motors?
Foundational article on shaft voltage and bearing currents in inverter-fed motors.
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