nuckolls.bob(at)aeroelect
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 Posted: Tue Jul 08, 2014 5:03 pm Post subject: Alternator Conversion to External Regulator. |
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0805074.pdf
Subject: Alternator Conversion to External Regulator.
From: "MikeDunlop" <mdunlop001(at)aol.com>
To: aeroelectric-list(at)matronics.com
--> AeroElectric-List message posted by: "MikeDunlop" <mdunlop001(at)aol.com>
I'm in the process of following Bob's advice and am about to convert a Nippondenso alternator to external regulator. After a lot of searching and research I've come across the following two methods.
1. http://www.aeroelectric.com/articles/Alternators/One-Wire_Alternator_Conversion.pdf
2. http://homepages.paradise.net.nz/georger/Alternator.htm
In this article it states:
Before we start we need to know one piece of important information about your charging circuit.
There are two main types of alternators and we need to know which type you need. The types are known as Type A and Type B. The difference being where the regulator fits in relation to the alternator.
WWwaayyy back when, it was not uncommon for a designer
of automotive generators to pick one of two wiring
configurations for the machine's field winding connections.
A 'type-A' configuration attached one end of the
field winding to the armature + power output
terminal. Pulling the field DOWN to ground through
an external regulator had the effect of increasing
the generator's output voltage.
"Type-B" wiring attached one end of the field
to the armature - brush (ground). Pulling the
field UP to bus voltage through the regulator
caused the machine to come alive and produce
power.
I've seen both styles of field wiring in
automotive generators. However, both generators
and alternators for airplanes have been pull-up-to-bus
or type-B configuration is the configuration
of choice . . . that choice is reflected in
ALL AeroElectric drawings.
I've never encountered an internal alternator
regulator configured for type-B (pull-up).
As the articles state for ND alternator conversion,
part of the mod calls for cutting one of
brush connection loose from the B-terminal
so that it can be grounded . . . thus converting
it from type-A pull-down to type-B pull-up.
Bob . . . [quote][b]
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