Testing of Converter Transformers This post discusses some aspects associated with testing of converter transformers. Most tests performed on converter duty (VFD) transformers are same as those specified for power transformers. However, there are also few differences which are highlighted Read more
LCI versus VSI Technology: Commercial Comparison In our LCI versus VSI series of articles we have intensively discussed the technical aspects and performance of both high-power drive technologies. Based on your feedback you are interested in a commercial comparison as Read more
Comparison of LCI versus VSI Technology: Myths and Truth We have already discussed the comparison of LCI versus VSI technology quite in detail [1]. However, there is an article [2] in the Internet making a similar comparison of above VFD 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 Read more
Easter Contest Easter is just around the corner. And we have an Easter Contest prepared for you. Participate and, with a bit of luck and speed, win a prize. Your task Easter symbols are hiding in our blog. Your task Read more
Differences between IEC and IEEE design of transformers In this post, we are going to explore some of the differences between IEC and IEEE design of transformers. Our remarks are not valid for VFD transformers only. Instead, most of them Read more
It Is Webinar Time! Update: Dear visitors, Thank you for your interest. Please note that the webinars are not available anymore. We will consider making a new webinar series in the future. Feel free to contact us in case of 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, Read more
Best VFD topology: One size fit all? If you deal with variable frequency drives (VFD) you have certainly asked yourself the question: What is the best VFD topology? Why do the big brands have several different products in their portfolio? Read more
One reason for torsional vibration issue:Torque ripple In this post we look at torque ripple, its background, character and impact on the shaft string. After reading through you will have a brief idea what the torque ripple is and how Read more