VFD harmonics injected into grid: FAQ Working in drives business for over 15 years I have heard many questions related to VFD harmonics. Some of them come repeatedly signalling that they may not be well understood. In this post we Read more
Aluminium and copper in variable frequency drive systems: Which one is the right choice? In variable frequency drive systems, electric conductors are key parts. Whether it is transformer winding, core of power cable, VFD internal busbars or stator and rotor Read more
What types of electromechanical switching devices are used in MV VFD systems? In this blog post we will talk about switches in variable frequency drive (VFD) systems. However, our subject are not the semiconductor switches but electromechanical switching devices (e.g. Read more
Drive cooling concepts fit for extreme ambient conditions In this blog post the author shares thoughts on how to keep the power electronics cool (but not too cold) in extreme environmental conditions. While there may be multiple technical solutions, the Read more
How are VFD and motor frame sizes defined? When talking about the size of variable frequency drives (VFD) and motors, the word frame is often used. What is the definition of VFD and motor frame size? That is shortly explained Read more
What is the starting time of a VFD-fed motor? This question sounds rather trivial: What is the starting time of a VFD-fed motor? The answer is not complicated either. We just need to be specific what we mean: Time from Read more
How is the VFD installed in a civil structure? In this post we look at the ways how to install VFD into a civil structure, meaning a building. What options exists and how do they differentiate? 3 ways of VFD Read more
Sönmez Trafo celebrates 50 years anniversary Sönmez Trafo, manufacturer of special purpose transformers, celebrates 50 years anniversary. A significant portion of their production are transformers for variable frequency drives (VFD) and other power electronic applications. We had the opportunity to Read more
Certifications for medium voltage VFDs Introduction Medium voltage variable frequency drives (MV VFD) play a crucial role in various industries by providing efficient and reliable control of motors, optimizing the technological processes and providing considerable energy savings.The MV VFDs are Read more
Are you desperate with your power bank? Portable power bank is a practical solution to charge your phone, tablet, headset and other kind of small electronic devices or gadgets. A power bank is characterized by its nominal capacity, typically expressed Read more