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Overcoming VFD Condition Monitoring Challenges With Ultrasound

Bob Lees | Corporate Trainer, SDT
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Webinar Description

The prevalence of Variable Frequency Driven motors (VFDs) is on the rise and causing quite a concern for condition monitoring technicians. Noise from the whine of the VFD presents challenges for vibration analysts. These challenges can be overcome with ultrasound technology so long as the inspector has a strong level of competency. That includes a better understanding about how to interpret ultrasonic condition indicators.

Ultrasound offers a simple assessment method for determining lubrication replenishment intervals and detection of bearing defects. To overcome the interference from VFDs, technicians must understand how to interpret the correlation between RMS and Crest Factor data from their ultrasound instrument.

 Learning Takeaways

  • Learn how ultrasound condition indicators go beyond the single decibel to interpret lubrication and bearing defects despite VFD noise.
  • Discover the role ultrasound plays in determining stage 1 and 2 bearing failures.
  • See a real-world case study from a Canadian steel mill that uses VFDs predominantly in their hot mill.

About the Presenter

Bob comes to SDT after a long career in maintenance and reliability at one of Canada’s most successful pulp producers. With 10 years’ experience in condition monitoring, Bob was instrumental in the implementation of a successful ultrasound program at Canfor Pulp and Paper. He is a certified adult instructor, a Certified Maintenance and Reliability Professional (CMRP), a Certified Reliability Leader (CRL), a Red Seal Millwright, Class 3 stationary steam engineer, Cat III vibration analyst, a Level 2 certified ultrasound inspector, and is ICML certified to ML-1Bob is comfortable in any teaching environment and has often presented to large audiences at technical conferences around the continent.

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About the Author

Bob Lees Corporate Trainer, SDT

Bob comes to SDT after a long career in maintenance and reliability at one of Canada’s most successful pulp producers. With 10 years’ experience in condition monitoring, Bob was instrumental in the implementation of a successful ultrasound program at Canfor Pulp and Paper. He is a certified adult instructor, a Certified Maintenance and Reliability Professional (CMRP), a Certified Reliability Leader (CRL), a Red Seal Millwright, Class 3 stationary steam engineer, Cat III vibration analyst, a Level 2 certified ultrasound inspector, and is ICML certified to ML-1Bob is comfortable in any teaching environment and has often presented to large audiences at technical conferences around the continent