09-14-2018, 07:49 AM
(09-14-2018, 02:46 AM)postoak_imp Wrote: Thanks, why did the field coil type reduce HP loss when the battery didn't need charging? Was power to the field coil cut (using some sort of feedback mechanism)?
(09-14-2018, 02:40 AM)Houtman_imp Wrote: Brushes on the CBX lasted between 10 and 15 thousand miles , always had a spare set with me and easy to change on the road.
Early CBX 's were often made redundant because owners were afraid of an expensive repair or new alternator .Brushes were very cheap.
What do you mean they were made redundant?
The CB1100 type, with its permanent magnets is so simple compared to the other two types that I think there must be some downside to it or why would they have gone to so much trouble to use electromagnets on the rotor?
Yes, as Max said, the mechanical regulator had a set of points that an electromagnet would close when battery voltage dropped enough to weaken the electromagnet. When it was charging, it added some frictional drag from the magnetism. Some production road racers used to have a toggle switch to interrupt the power to the exciter coil. Maybe one or two horsepower more, maybe it was all in their heads.