LCI celebrates 50 years anniversary! It is little bit hard to believe but the high-power drive champion LCI celebrates 50 years anniversary in 2024. We take this opportunity to look back at the history of this matador and maybe also a little outlook. Birth of LCI in 1974 It was Read more…
VFD industry requirements: Power generation In today’s post we will have a look at variable frequency drives (VFD) employed in power generation industry. We start with applications of drives in power generation and then discussing the requirements on those VFDs. First let’s have a look where we can find VFDs Read more…
When is transformer tap changer needed? The input isolation transformer in a drive system may be equipped with a tap changer. Such device provides some flexibility but adds cost and potentially also complexity to the transformer design. Thus, the question is whether a tap changer is needed or not. The Read more…
Get our Blog Book in pdf format Do you enjoy reading our blog online? Then you might be interested to get your own copy of all our blog posts in form of a digital blog book. History of our blog We had the idea to write posts about medium voltage Read more…
Special offer for our premium subscription, webinars and trainings No Black Friday this year. We have something much better: Our special offer on premium plans, training courses and webinars combined with humanitarian aid. Purchase one of our premium subscription plans, webinars or trainings with a discount and do something good Read more…
What VFD properties matter the most to you? Medium voltage VFD is often a long term investment. The expected lifetime is typically at least 20 years. Thus, it is important to make the right choice when purchasing it. That is easily said, right? But there are several products on the Read more…
What is the difference between VFD and VDS? This article aims to answer one relatively simple question: What is the difference between VFD and VSD? As the question was raised again recently, we would like to deliver an understandable explanation. Let’s start with the abbreviations first to ensure that we Read more…
Abbreviations and Definitions This post summarizes and explains some of the most commonly used abbreviations and definitons from the field of variable frequency drives (VFD), drive systems and associated areas, such as power electronics, harmonics and power quality, monitoring, testing… AFE Active Front End Grid side converter (in drives often Read more…
Which one is your VFD hero? VFDs, together with their rotating partners (motors) perform lot of work behind the scene. As we already know, there are multiple VFD topologies available on the market. While they all fulfill the basic purpose, such as soft starting of the machine and speed or Read more…
Braking capability of VFD fed motors Not every VFD is capable of active braking. And not every application requires active braking either. In today’s post we are going to review the braking capability of most common medium voltage VFDs. Let’s start with the need for braking. In fact, many applications Read more…