Short circuit currents appearing in variable speed drive systems The knowledge of short circuit current level in variable speed drive systems is crucial for the design of system components as well as for the system protection. Inadequate dimensioning, unsuitable protection concept or wrong parameterization may lead to fatal consequences: Hazard 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…
Lunch & Learn (& Help) Lunch & Learn is a popular concept of short trainings and seminars held during or around lunch breaks. In a bit informal way you learn about particular topics. It is one topic per session, served in a bite size format and optimized for participant’s digest. Read more…
FIT rate of power semiconductors: What are the main factors? FIT rate (FIT = Failure In Time) is a common indicator to express the reliability of a semiconductor. And, as we know, reliability and availability is crucial for almost any customer. Therefore, the legitime question is: what are the main Read more…
What does the X/R ratio tell us? In one of our previous posts we have talked about “purely inductive grid”. That is certainly a special case of oversimplification. Keeping it still very simple we may use “resistive-inductive grid”. The relationship between the resistive and reactive component is particularly interesting. What Read more…
Opportunity for talented Ukrainian student or trainee Ukraine needs our support. And the possibilities are almost endless. Starting from expressions of solidarity, material or financial help, accomodation of refugees up to long term investment and aid to rebuild the country. One contribution is to offer an opportunity for a talented Read more…