Variable frequency drives (VFDs) can output simulated waveforms of nearly any frequency. However, in order to be truly useful, harmonics and resonance in the system must be avoided and frequency parameters should be put in place.
March 08, 2021 by David Peterson
Three-phase motors with three or six wires have limited options for wiring, but are easier to use and have important roles to play. Learn the difference between three- and six-wire three-phase motors for low and high voltage applications.
February 13, 2021 by David Peterson
There are two types of winding designs inside three-phase industrial motors: Wye and Delta. Although the motors and connections look similar on the outside, this article discusses the internal construction for Delta wound motors.
January 20, 2021 by David Peterson
In circuit theory, voltage drops of resistive type devices are relatively simple because they do not change over time. But there are two types of devices that do create changes over time: capacitors and inductors.
November 30, 2020 by David Peterson
In nearly every machine with motion, a selection of gears, belts, and chains sends power to the final mechanisms and power must be transmitted from the motor to the final load(s) device. Choosing between transmission methods isn’t always simple, but a few key properties can help to make the choices easier.
September 23, 2020 by David Peterson
Whether using an industrial DIN-rail power supply or a linear supply for an audio application, these devices have the potential to fail. Although there can be several reasons, there are a few simple (and some not-so-simple) methods of testing a power supply for proper functionality.
September 14, 2020 by David Peterson