VFD
Five Minute Facts
Replace The Motor Or The VFD?
On start-up a fault code was received on a VFD operating an exhaust fan at a pharmaceutical manufacturing facility. Was it the motor or the VFD?
- Noah Bethel
- PdMA Corporation
Webinars
Overcoming VFD Condition Monitoring Challenges With Ultrasound
The prevalence of Variable Frequency Driven motors (VFDs) is on the rise and causing quite a concern for condition monitoring technicians. In this free webinar, you'll discover the role ultrasound plays in determining stage 1 and 2 bearing failures...
- Bob Lees
- SDT
Five Minute Facts
The Ultrasound Approach: VFD Drives and Condition Indicators
VFDs seem to be taking over the world; however, you may hear ultrasound inspectors complain they are having trouble interpreting data. Is there a simple assessment? Find out more in this short video…
- Allan Rienstra
- SDT International
Case Studies and Stories
Energized Motor Testing Reveals Improper VFD Settings
This 55-kilowatt, 400-volt motor is controlled by a variable frequency drive (VFD). This motor drives the centrifugal fan that sends air into a natural gas combustion burner...
- Ettore Di Pasquale
- ALL-TEST PRO
Case Studies and Stories
What is 3 Minutes of Motor Testing Worth to You?
A motor distributor in the Netherlands provided a 17 Kilowatt, 400-Volt motor to a local hospital in 2015. The hospital rented a portable crane to install the motor onto the roof of the building. The motor is used to operate a fan that is mounted on the hospital’s roof...
- Richard Scott
- ALL-TEST PRO
Articles
Vibration Measurement Techniques for Continuously Varying Speed Machinery
There are a lot of equipment types in industry that exhibit continuously varying speed. This presents a number of challenges to the vibration analyst. If a time sample is collected as the machine is continuously changing speed, the FFT will produce a virtually useless plot...
- Greg Lee
- PRUFTECHNIK
