Posted by John T on November 28, 2012 at 05:58:01 from (216.249.82.117):
In Reply to: Generqtor differences posted by charlie M on November 28, 2012 at 05:42:32:
Its much deeper then this but I will toss out a few differences, NOT any complete treatise remember so dont anyone have a calf and cut me some slack if it isnt PERFECT
The earlier gennys and systems had less reliable and cheaper regulation methods to prevent the genny running away with itself and used the simpler cheaper cutout relay and the manual Low High charge control (LHBD light switch and charge control) and the third adjustable brush provided an addition manual method to control charge rate and prevent over current.. The field current (which determines in part the output along with the gennys RPM) was regulated manually
Later on to automatically control the charge rate more complex regulation was accomplished using full fledged Voltage Regulators (they automatically controlled field current) and gennys only had 2 brushes as the better VR automatically regulated and protected the genny.
I have data showing the output versus RPM of 2 versus 3 brush gennys and the more complex engineering differences and Im sure my sparky friends Jim and Bob M do also but Im too lazy to do more and post more stuff for now, the first wife has some chores for me lol
PS they also made some 3 brush gennys that still used the later VR"s and when I converted from a relay to a VR on a 3 brush genny I set the third brush over to max charge sionce the VR would regulate and still protect the genny from over current.......
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