How EV and High-Speed Motors Can Benefit from Reliable Shaft Grounding Ring

Electric vehicles and high-speed industrial motors are driving a new era of efficiency and performance. However, these advanced motor systems also introduce new reliability challenges, particularly when it comes to shaft voltage and bearing protection.

To help engineers and manufacturers address these challenges, Volsun will present its shaft grounding solutions at EASA 2026, taking place June 14–16, 2026, in Orlando, Florida.

The Growing Challenge of Shaft Voltage

Modern motor technologies increasingly rely on inverter-based drive systems. While these systems improve efficiency and control, they can also generate common-mode voltages that build up on the motor shaft.

When shaft voltage becomes high enough, electrical discharge can occur through the bearings. Over time, repeated discharges may damage bearing surfaces and reduce motor lifespan.

This issue is especially important in:

• Electric vehicle motors
• High-speed motors
• Oil-cooled motors
• Servo motors
• Industrial drive systems

As motor speeds continue to increase, even small electrical discharges can create significant reliability concerns.

Why Bearing Protection Matters

Motor bearings are designed to support mechanical loads and ensure smooth rotation. They are not intended to carry electrical current.

When electrical current repeatedly passes through bearings, the result can be:

• Surface pitting
• Frosting and fluting
• Increased vibration levels
• Reduced efficiency
• Premature maintenance requirements

For EV manufacturers and industrial operators, bearing failures can lead to costly downtime and reduced equipment performance.

A Simple and Effective Shaft Grounding Ring Solution

Shaft grounding rings provide a direct path for shaft currents to safely reach ground before they pass through motor bearings.

Volsun shaft grounding rings are engineered for demanding applications where reliable grounding performance is critical. The conductive fiber technology maintains continuous contact with the rotating shaft, helping protect bearings throughout the motor's operating life.

Applications include:

• Electric vehicle traction motors
• Industrial VFD motors
• Pumps and compressors
• Wind power generators
• High-speed rotating equipment

Meet Volsun at EASA 2026

At EASA 2026, visitors can learn more about shaft voltage protection strategies and discuss specific application requirements with the Volsun team.

Exhibition Information

Event: EASA 2026
Date: June 14–16, 2026
Location: Orlando, Florida, USA
Booth Number: 1429

Visit Booth 1429 to discover how reliable shaft grounding can help improve the performance and longevity of modern motor systems.