Slim DC-Link Variable Speed Drives – Strengths and Weaknesses
Recent years have seen the increasing availability of frequency converters with a Slim DC-Link, apparently offering a lower harmonics signature. This solution is based on a low internal DC-bus capacitance. Harmonic currents are mostly generated while the…
Harmonics and What You Can Do About It
The purpose of this article is to provide a brief introduction to the available alternative harmonic mitigation methods, with particular reference to ac variable frequency drives and with special attention given to the ‘Slim DC-Link’ method. Fourier…
The Path to Prolonged Life for VFD’s and Motors Begins with Proper Maintenance
One of the main factors for obtaining long reliable service from any piece of equipment is maintenance. Any type of electrical or mechanical device is subject to wear and tear. This can be further aggravated by undesirable…
Harmonic Distortion & Mitigation Training for the Electrical User
If your facility is experiencing problems such as transformer or cable overheating, or if you have erratic electronic performance, your facility may be suffering from harmonic distortion. Or if you are planning to add loads to your…
Using VFDs in Refrigeration and Cold Storage Applications (3)
Part Three: Screw compressor VFD application Also read Part One: Introduction Part Two: Variable frequency drives in refrigeration systems Screw compressors used in refrigeration plants are generally available in two types – one with a slide valve for…
What Does It Mean To Have An Energy Efficient Motor?
With energy taking up a large part of a plant’s costs, having efficient technologies throughout can result in significant decreases in operating costs. The industry has seen many advances in energy efficient pumps which happen on a…
