High-speed drives: VFD perspective In the introduction to high-speed drives [1] we have briefly described the design variants of semi high-speed and high-speed motors. The impact on construction of the motor is significant. High-speed motors can be quite different compared to the conventional machines. But how about the VFD? What Read more…
VFD as soft starter Welcome to the next article in our motor starting series. This time we will talk about VFD as a soft starter. Our first post focused on direct on-line motor start as the cheapest and simplest method. The second article provided a brief overview of common motor Read more…
Multidrives and their benefits Multidrive concept is a VFD solution where multiple motors are supplied and controlled from one VFD having several inverters connected to a common dc link. This concept has several advantages and is especially popular in certain applications, for instance rolling mill drives or specific test stands. Read more…
High altitude Majority of variable frequency drive (VFD) systems is installed at altitudes below 1’000 meters above sea level (masl). In such cases no additional considerations due to installation height apply. However, there are sites located at high altitudes. How does it impact the VFD and other drive components? What Read more…