Undervoltage Ride Through This post talks about VFD capability to withstand a fault in the supplying grid without tripping the drive system – undervoltage ride through function [1]. Availability of drive system is very important for many users and the importance of high availability is expected to grow. It implies Read more…
LCI versus VSI:Part 3: Comparison Figure 1: LCI vs VSI In today’s column we continue our popular series ‘LCI vs VSI’ and look a bit closer at the differences between a load-commutated inverter (LCI) and voltage source inverter (VSI). 1. History and references The history of LCI started in mid Read more…
How to choose a medium voltage VFD:Design robustness Every end user probably wishes that his VFD has a robust design and works as intended during the entire lifetime of at least 20 years. Unplanned shutdowns and outages are unwanted. But what is robust design and how can it be achieved? Read more…