Types of IGCT devices IGCT (Integrated Gate-Commutated Thyristor) is a popular power semiconductor device used in medium and high voltage power electronic applications. The switch has outstanding capabilities as explained in [1] and [2]. In this post we will introduce three fundamental types of IGCT devices. IGCT device basically consists Read more…
Challenges of high-speed machine design In turbomachinery applications the conventional solution is a 4-pole machine with nominal speed in the range 1’500 – 2’000 rpm and a speed-increasing gear. However, the alternative is a gearless high-speed drive. Such concept may offer several advantages (compact design with small footprint, absence of 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…