Reliable Bearing Protection Engineered by Volsun
With the widespread adoption of variable frequency drives (VFDs), modern electric motors are operating more efficiently than ever. However, this efficiency also introduces an often-overlooked risk: shaft voltage and stray shaft currents, which can severely shorten bearing life.
Volsun provides engineered Shaft Grounding Ring solutions designed to effectively discharge harmful shaft currents, protect motor bearings, and improve long-term system reliability in demanding industrial environments.
Why Shaft Grounding Is Critical in VFD-Driven Motors
VFD-controlled motors generate high-frequency switching voltages that induce electrical potential on the motor shaft. When this shaft voltage exceeds the dielectric strength of the bearing lubrication film, electrical discharge occurs through the bearings.
Over time, this leads to:
- Electrical discharge machining (EDM) damage
- Bearing fluting and pitting
- Increased vibration and noise
- Premature bearing failure and unplanned downtime
Traditional countermeasures such as insulated bearings alone are often insufficient. A dedicated shaft grounding path is the most direct and reliable solution.
How Volsun Shaft Grounding Rings Work
Volsun Shaft Grounding Rings are installed directly on the motor shaft or end bracket, providing a continuous, low-impedance path that safely diverts shaft currents to ground—before they can pass through the bearings.
Our designs utilize 360-degree conductive fiber contact technology, ensuring stable electrical performance without damaging the shaft surface.
Unlike conventional carbon brushes, Volsun grounding rings are optimized for:
How Volsun Shaft Grounding Rings Work
Volsun Shaft Grounding Rings are installed directly on the motor shaft or end bracket, providing a continuous, low-impedance path that safely diverts shaft currents to ground—before they can pass through the bearings.
Our designs utilize 360-degree conductive fiber contact technology, ensuring stable electrical performance without damaging the shaft surface.
Unlike conventional carbon brushes, Volsun grounding rings are optimized for:
- Minimal mechanical wear
- Low friction at high rotational speeds
- Long service life with little to no maintenance
Key Performance Advantages
1. Effective Shaft Voltage Suppression
Volsun grounding rings rapidly discharge high-frequency shaft currents, significantly reducing the risk of bearing electrical erosion in VFD applications.
2. Ultra-Low Wear Design
Advanced conductive fiber structures maintain consistent contact while avoiding excessive shaft wear, even under continuous operation.
3. Designed for Harsh Industrial Environments
Our shaft grounding solutions are engineered to perform reliably in environments with oil mist, dust, humidity, and temperature fluctuations.
4. Flexible Installation Options
Suitable for both OEM motor integration and retrofit installations on existing equipment, with multiple mounting configurations available.
5. Extended Bearing and Motor Life
By preventing electrical damage, Volsun shaft grounding rings help lower maintenance costs and extend overall equipment service intervals.
Typical Applications
Volsun Shaft Grounding Rings are widely used in applications where VFD-induced shaft currents are present, including:
1. Effective Shaft Voltage Suppression
Volsun grounding rings rapidly discharge high-frequency shaft currents, significantly reducing the risk of bearing electrical erosion in VFD applications.
2. Ultra-Low Wear Design
Advanced conductive fiber structures maintain consistent contact while avoiding excessive shaft wear, even under continuous operation.
3. Designed for Harsh Industrial Environments
Our shaft grounding solutions are engineered to perform reliably in environments with oil mist, dust, humidity, and temperature fluctuations.
4. Flexible Installation Options
Suitable for both OEM motor integration and retrofit installations on existing equipment, with multiple mounting configurations available.
5. Extended Bearing and Motor Life
By preventing electrical damage, Volsun shaft grounding rings help lower maintenance costs and extend overall equipment service intervals.
Typical Applications
Volsun Shaft Grounding Rings are widely used in applications where VFD-induced shaft currents are present, including:
- VFD-driven industrial motors
- Pumps, fans, and compressors
- HVAC systems
- Power generation and renewable energy equipment
- Electric vehicle and traction motors
- Automated production lines and process equipment
Whether for continuous-duty motors or high-load industrial systems, Volsun provides application-matched grounding solutions.
Volsun Engineering Expertise
With over 20 years of experience in electrical insulation and protection materials, Volsun understands the interaction between electrical stress, mechanical design, and real-world operating conditions.
Our shaft grounding ring solutions can be tailored based on:
Volsun Engineering Expertise
With over 20 years of experience in electrical insulation and protection materials, Volsun understands the interaction between electrical stress, mechanical design, and real-world operating conditions.
Our shaft grounding ring solutions can be tailored based on:
- Shaft diameter and rotational speed
- Motor power and drive type
- Environmental exposure (oil, dust, moisture)
- Installation constraints and lifecycle requirements
This application-driven approach allows Volsun to deliver reliable, long-term bearing protection, not just standardized components.
By choosing Volsun Shaft Grounding Ring solutions, you invest in reduced downtime, extended equipment life, and improved operational reliability.
Looking for a Customized Shaft Grounding Solution?
Volsun supports OEM and project-specific designs, helping customers integrate shaft grounding solutions seamlessly into their motor and equipment systems.
Contact Volsun discover how our shaft grounding technology can protect your equipment—reliably and efficiently.
By choosing Volsun Shaft Grounding Ring solutions, you invest in reduced downtime, extended equipment life, and improved operational reliability.
Looking for a Customized Shaft Grounding Solution?
Volsun supports OEM and project-specific designs, helping customers integrate shaft grounding solutions seamlessly into their motor and equipment systems.
Contact Volsun discover how our shaft grounding technology can protect your equipment—reliably and efficiently.
- CONTACT TEL: +86-512-66386808
- SALES CONTACT: volsun2006@szvolsun.com