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.
1 kVA solid state frequency converter, converting 60Hz to 50Hz, also boosting 110V/120V to 220V/230V/240V with built-in step up transformer, for US and Europe home appliances, new design in low price.00VA 110v, 120v 60Hz to 220v, 230v, 240v 50Hz converter. 500 VA static frequency converter, change 1 phase 110V 60 Hz (e.g. Japan) to 220V 50 Hz (e.g. NZ) in one step by built in step up transformer, convert 120V 60Hz to 230V, 240V 50Hz with pure sine wave output.