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An Alternate PM Alternator Design
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50
comments (50 topical, editorial)
Re: An Alternate PM Alternator Design
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#18
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by finnsawyer on Tue Apr 25th, 2006 at 08:35:12 AM MST
(
User Info
)
The coils are assumed all wound the same way with the voltages as shown. Simply connect the negative side of V1a to the positive side of V1b to form V1. Do the same for the other two phases. Then connect the negative side of phase one to the positive side of phase two and the negative side of phase two to the positive side of phase three. If you wish to bring out the 'center tap' that is taken off from the connection on phase two between V2a and V2b. The important thing is that when V1a is going negative (as shown) then so is V1b. Similarly, when V2a is going negative then so is V2b. When phase three encounters the north pole, as it will do, then both V3a and V3b must both create a positive pulse. At this point it's basically defining the winding of the coils such that these relationships hold. In building this it requires checking the voltages when turning the rotor to make sure the relationships hold. In that sense a diagram would be of no real help since I can not predict how someone will set up his coils. Note that if it happens that V1a actually goes positive while V2b goes negative then you just exchange the plus and minus signs on V1a. That is, you redefine the voltage V1a. These kind of ambiguities are quite common in electronic circuits, but are really of no consequence as long as we are consistent in our definitions. I hope this helps.
GeoM
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An Alternate PM Alternator Design
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50
comments (50 topical, 0 editorial)
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