zero maintenance brushless alternator

[PSD]

An alternator is an AC generator, hence the name. 
Far as this design you mention, I thought all alternators were already built
that way.  The slip ring providing current to the spinning bits is for the
exciter voltage, not the heavy load output voltage.

-----Original Message-----
From: quattro [mailto:quattro-bounces at audifans.com] On Behalf Of Mike Arman
Sent: Saturday, October 31, 2015 9:43 AM
To: quattro at audifans.com
Subject: zero maintenance brushless alternator



Zero maintenance brushless alternator . . .


Some of the older Honda 750 motorcycles had a very clever setup. The field
and the armature are both 
stationary, mounted on the engine end-cover. The pole pieces ("claw plates")
rotate between them, it 
is a welded assembly which is bolted to the end of the crank. There is no
outboard end bearing (but 
there could be).

When I first opened one of these up, I thought it was an AC generator, but
after a very few moments, 
I saw the three output wires, six diode rectifier and voltage regulator. A
quick check of the 
schematic showed that this was indeed an alternator.

Looking at this, there is NO reason this idea couldn't be applied to replace
any slip-ring+brushes 
alternator. It would remove some of the least reliable parts from (an
admittedly already quite 
reliable) system, reducing the parts count and simplifying the entire
device.

All it has to do is turn. The only "wear" items would be the two ball
bearings on the shaft. This 
plus a set of beefy silicon diodes (rated at 10x the system output, hey,
these are cheap) and a 
proper solid state regulator would give a charging system which would last
essentially forever with 
about zero maintenance.

Best Regards,

Mike Arman
90 V8Q, garage queen these days
_______________________________________________
quattro mailing list
http://www.audifans.com/mailman/listinfo/quattro
http://www.audifans.com/kb/List_information