Originally posted by Midaztouch
View Post
Originally posted by Midaztouch
View Post
The 'melt down' on his thread with regards to timing and the confusion it seems to cause some (maybe nearly all) people I think is mostly due to the consideration of two live comm segments together at the same time. I think Sam and Gary's comments about coils 'ramping up' to full field is probably correct to some degree.
I favoured the single comm connection idea to estimate the interaction path of one set of energised coils ie. time on brush...and with Sam and Gary's comments I am all the more convinced.
So I think post #54 maybe correct or not, but I think it is misleading. There is A LOT of real world things to consider in the actual operation of fast spinning machines...most of these things make the theoretical just that...a best guess.
Looking at the schematic at the top of the post. With all brushes energising their respective coils as you suggest. The poles firing south are trying to make the shaft 'north' and the coils firing north are trying to make the shaft 'south'.
That certainly doesn't sound like something that is without consequences...I just don't know what those consequences are.
However each coil group north or south does not share its poles with an opposite coil field so in that respect it is a good design in my opinion. Each coil group is using its field to repel out of the magnet area and attract into the next as the field collapses and therefore reinforces the rotation.
I know that in my north / south motor the coils are reinforcing each other. And that seemed like a good thing to do. The flik-flak of the coils from north to south every half turn is an unavoidable consequence of the single comm design. But I was willing to trade.
Good Hunting
mark
Leave a comment: