Brushless Alternators
Hamersley,
We have been using them in the military for well over 15 years.
Two analogies of principle.
One simple analogy of operation, is that it the reverse of electronic ignition theory, that eliminated points in gas engines. Like the electronic ignition, there is a reluctor on the main shaft. Unlike electronic ignition, there are coils in the alternator that the reluctor turns inside, and it produces power. A regulator harnesses the action, puts out a stable voltage. Whereas the electronic ignition has spurs that relay power to spark plug wires without physically touching. Similarly, the reluctor in the altenator does not touch the windings.
Another analogy, is that it is simply the reverse of an electric motor.
Major failure issue is regulators. We use many OEM variants of the brushless alternator, and regulators are the major cause of not charging. The reliability of these alternators is not in keeping at this point with the simpler brush type alternator. Secondly, costs are higher. Third, demand is still low. When the benifits to fit on new platforms and the reliabiltiy increases, you will see more. They tend to run cooler at high amperage, so expect to see more of them, but expect to see it slowly emerge into the market.
Wayne
http://www.prestolite.com/literature/alts/PP1097_bld_12v.pdf
"Several manufactures make these.....
1. HOW do they work AND
2. Why aren't we using them???????"
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