A simplified approach to what you need to know. VFDs Add Efficiency…But Create Power Quality Issues Adding a VFD to electrically control motor speed increases efficiency by limiting energy consumption and reducing equipment wear. However, VFDs inadvertently create power quality issues in the form of harmonics, which are changes or distortions in the waveforms. There… Read more »
Variable Frequency Drive Effects on Power Quality
Motor Bearing Protection Guide
Download a PDF version of this page Download a PDF version of this page Defining the added benefits of the dV Sentry™ versus a shaft grounding brush. What’s a Shaft Grounding Brush? A common method across industries is to use a shaft grounding brush or ring to protect motor bearings from common mode over voltage. A shaft… Read more »
Harmonic Solution Guide
Download a PDF version of this page Power quality solutions for line side harmonic distortion in non-linear loads What are Harmonics? Harmonics can be best described as the shape or characteristics of a voltage or current waveform relative to its fundamental frequency. But what does that mean? Well, the ideal power source for all power systems are smooth sinusoidal… Read more »
Common Mode Overview and Reduction Guide
Download a PDF version of this page Understanding the creation, effects, and how to reduce common mode over voltage What is Common Mode? To start off, common mode is bad. Common mode voltage is created by Variable Frequency Drives (VFDs) that serve as a way of controlling the speed of AC motors by…
Motor Protection Guide
Download a PDF version of this page Load-side solutions for power quality in systems using Variable Frequency Drives How Variable Frequency Drives (VFDs) Work VFDs serve as a way of controlling the speed of AC motors by varying the frequency of the power source using pulse width modulation (PWM). This is done by switching the transistors, IGBTs, or thyristors,… Read more »
Meeting IEEE-519 with a Six-Pulse VFD
Download a PDF version of this page A six-pulse VFD with a Matrix® AP is a better and more cost effective solution to conform to IEEE-519 than a multi-pulse or AFE drive. Use of VFDs & Harmonic Issues Many industries across the globe use Variable Frequency Drives (VFDs) to efficiently control the electrical power needed to run motors,…