Most common medium voltage VFD topologies in comparison Abstract Medium voltage drives consist of several topologies. While some of them are seldom found in industrial applications, others are very popular and create integral part of the portfolio of most global VFD manufacturers. In this article we look at the most Read more…
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…
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…
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…
VFD versus gas turbine In this post we are going to compare two variable speed drive solutions: an electric drive consisting of a VFD and a motor and a gas turbine. Gas turbine is an internal combustion engine, i.e. an energy conversion device that converts energy stored in the fuel Read more…
To Gear or not to Gear? “To Gear or not to Gear: That is the question!” Dear readers, it is April 1, the Fool Day. However, we are not going to fool you. Instead, we have just allowed ourselves to paraphrase the famous quote by Shakespeare from Hamlet, Act 3 Read more…
4 types of VFD specifications We have already talked a bit about customer specifications and the implication on VFD design. Unfortunately, those who shall primarily receive the message, may not be readers of our blog. Not yet, at least. Anyway, in this post we will introduce 4 types of VFD Read more…
AC versus DC drive For decades DC drive was a preferred choice for variable speed motors due to its easy and accurate way of speed or torque control. However, the development of AC drives changed the competitive landscape and paved the way for AC drives. What was the reason for Read more…
VFD control: An introduction In this post we introduce basic thoughts on VFD control. Some of you asked deeper questions about different motor control strategies and their benchmark. Such comparison will be subject of a separate post, resp. a dedicated motor control series. Today’s article provides a base for further Read more…
Advantages of liquid cooled drives This article deals with liquid cooling for high power variable frequency drives (VFD). What is the principle of liquid cooling? What kind of liquid can be used for cooling? What are the advantages of liquid cooled drives? Continue reading this post on advantages of liquid Read more…