Student: I can't figure out how to do that, since I can't seem to cut off more than two of the four corners. Mentor: Don't worry, what I asked you to do is actually impossible! There are only six faces on a cube, so the highest number of sides possible is six. Student: That makes sense. I bet you can do that with any prism-it's just a matter of angling the cross section correctly to intersect all of the faces. Mentor: You're very right, any prism can be cut in such a way that the cross section has as many sides as the prism has faces. However, not all shapes have this same property.
Recently, a new technology i.e. variable frequency transformer (VFT) has emerged as a flexible ac link to transfer power in-between asynchronous power grids. Hence, this paper aims to explore the possibility of grid integration of PMSG based WTG using VFT.
Variac transformers are available that boost the output voltage in excess of twice the input voltage. Input frequencies to 2000 Hz can be accommodated on some models. Variac Selector assists you in the selection of the best variable transformer for your application.This is usually the best place to start.ariac-Staco Variable Transformers. We offer Variac transformers (variable transformers) with ratings from 120V to 600+ VAC single and three phase and fractional to 1000+ Amps.