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
Gear mesh frequency analysis is a key tool for vibration monitoring programs focusing on gearboxes. There are a number of reasons a gearbox may fail including tooth wear, tooth load, gear eccentricity, broken or cracked teeth, gear misalignment and more.
- Peter Eitnier
- Wilcoxon Sensing Technologies
The early detection and fault analysis of bearing problems is crucial. When a rolling-element bearing develops flaws on the races and/or rolling elements, there are four vibration frequencies that can result...
- Pawel Lecinski
Ron Newman defines frequency and what a machine’s frequencies can tell us, and he gives a brief overview of waveforms and spectrums…
- Ron Newman
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
In the last 20 years the industry has improved predictive maintenance processes and the tools used to perform it. In particular, vibration analysis technology has evolved to unimaginable levels.
What is vibration analysis? And more importantly, what do you need to know to start learning about it? Well, I invite you to read this article to explore it with me.
- Dr. Thierry Erbessd
- Erbessd Instruments
In the Part 2 the practical example will be analyzed.
Let’s look the background and calculate the most common frequencies produced by motor that potentially will be required for further analysis.
- Pawel Lecinski