Why do larger drives achieve better efficiency? How does the efficiency of a drive system scale with the power? And why do larger drives achieve better efficiency? That is the subject of this blog post. What is efficiency Efficiency is the ratio between output power and input power, typically expressed Read more…
How to measure VFD efficiency Energy efficiency is high on the agenda. VFDs are enablers on higher efficiency in drive systems, especially in flow control. However, how to deal with VFD efficiency? In particular, how to measure VFD efficiency and verify the figures provided by the manufacturer? There is a Read more…
VFD efficiency over 100%: A discovery of a perpetuum mobile? April 1, 2022 Variable frequency drives (VFD) help to save energy on a system level. Also on component level the VFD has very high efficiency. But could the VFD efficiency exceed 100%?? As today is April 1, the Fool Days, Read more…
Inverter current higher than input current (New Year’s Eve issue) Can inverter current to the motor be higher than the rectifier input current?That is a question that puzzles some people. Let’s have a closer look in our year-end post inverter current higher than input current. The recent advancements in VFD Read more…
Dream VFD You may think that the title of this article – dream VFD – does not sound very serious. However, let us elaborate on the topic a bit. It actually is a serious question: How does your dream VFD look like? What are the features of your dream VFD? Read more…