Variable Frequency
The Todd and Noah Podcast
Types of Motors Part 2.. Synchronous and DC with a bonus discussion on Variable Frequency Drives – Todd and Noah Show
In Part 2, Todd and Noah take the mystery out of electric motors. They give you the tell-all about synchronous and DC motors and their functions.
- Todd Gunderson Noah Bethel
- PdMA Corporation
Two Minute Tips
Stator Inter-Turn Stress with Electrical Signature Analysis in Variable Frequency Drive Applications
Incorrect settings in a Variable Frequency Drive (VFD) application have an impact on the windings of an electric motor. When a drive is not set correctly, or not tuned when not using straight volts/hertz settings, stresses occur between the turns in a winding. In some cases, this will appear as small Partial Discharges (PD), and in others it can be increased leakage between turns. When these conditions occur, they introduce small current discharges that effect the air gap magnetic field of the motor.
- Howard Penrose
- MotorDoc LLC
Webinars
Case Studies in Motor Testing
Join Noah as he discusses in depth various case studies involving Rotor, Servo, and Variable Frequency Drive motors. You won’t want to miss his expertise in discussing the motors, their characteristics, problems, and the testing used.
- Noah Bethel
- PdMA Corporation
White Papers
Technology Based Crane Monitoring and Diagnostics
Overhead cranes are often a single source cause of downtime in any manufacturing facility, especially when discussing those performing services in a steel mill’s melt shop. Often, these assets do not have redundancy that would allow for one to be taken....
- Stephen Bailey
- IVC Technologies
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
