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Forums
Engineering
Electrical Engineering
External-excitation Van de Graaff polarities
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[QUOTE="eigenmax, post: 6022462, member: 615526"] My question regards the polarities of the excitation supply and terminal in an external-excitation VDG. As you all probably know, external excitation VDGs use a voltage supply (usually 5,000-10,000V) to influence the charge on the lower pulley, instead of just relying on frictional contact to remove electrons from the belt. My question is, if I place the positive of my supply at the lower pulley, will the positive electrode of the supply draw electrons to it from the belt (as a positive object is an electron deficient one), thereby making a electron-deficient belt and a positive top terminal? If I use the negative electrode will I have a negative terminal? [ATTACH=full]227718[/ATTACH] There is a little diagram of the excitation supply at the top right. [/QUOTE]
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Electrical Engineering
External-excitation Van de Graaff polarities
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