Shaft Voltage Discharge Testing

Have you been experiencing low reliability of motor, pump, fan, or gearbox bearings after installing a new Variable Frequency Drive (VFD)? JPS Reliability can help!

What is EDM (Electrical Discharge Machining)

EDM Explained:

• Capacitive Coupling: The pulses from the VFD create a capacitively coupled common mode voltage on the motor shaft.
• Path to Ground: This voltage seeks a path to ground, breaking down the dielectric in the bearings.
• Electrical Discharge: The voltage arcs through the bearings, creating thousands of pits through EDM.
• Bearing Degradation: Bearings degrade, leading to increased friction and noise.
• Fluting Damage: Rolling elements can cause fluting damage to bearing races.
• Lubrication Failure: Bearing lubrication or grease deteriorates, burns, and fails.
• Unplanned Downtime: Potential for costly, unplanned downtime due to bearing failure.

How JPS Reliability Can Help

Shaft Voltage Discharge Testing:

• Identify Issues: Detect and diagnose issues related to shaft voltage discharge in motors, pumps, fans, and gearboxes.
• Prevent Bearing Damage: Implement strategies to prevent EDM-related bearing damage.
• Improve Reliability: Enhance the reliability and lifespan of your equipment by addressing shaft voltage discharge issues.

Key Benifits:

• Increased Equipment Lifespan: Reduce wear and tear on bearings, extending the life of your motors, pumps, fans, and gearboxes.
• Reduced Downtime: Prevent costly unplanned downtime by addressing issues before they lead to failure.
• Enhanced Performance: Improve the overall performance and efficiency of your equipment.

Contact Us:

For more information on Shaft Voltage Discharge Testing and how we can help improve the reliability of your equipment, please use our Contact Us form. Let JPS Reliability assist you in preventing EDM-related issues and ensuring the smooth operation of your machinery.