Electrex World for LED's

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madass140

madass140

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The Electrexworld alternator/ign unit for Nortons has a single yellow wire coming from
the reg/rec putting out 12v AC for lighting. Not much good if using LED's.
My question is how to convert this single output wire to 12v DC? normally you would
convert using a rectifier etc connecting the 2 AC alternator output wires.
Electrex World for LED's

Electrexworld are not replying to my emails which is a bit disappointing.
 
Briggs and Stratton have single wire wire output AC alternators, to convert to DC you can use a single diode in series on the yellow wire which does 1/2 wave rectification (you lose 1/2 the power) or they have another rectifier that give full wave, that connects to the yellow and earth and outputs DC. I don't pretend to understand why or how it works but it does on the lawn tractor I added LEDs to.
 
that is identical to the Reg/rect that the Electrexworld kit has , if you look at the wiring diagram above you can see that apart
from the 12v DC output to the battery, it has a single yellow wire also coming from the reg/rec which is 12v AC for lighting
which is not much good for LED's.
 
Looking at the diagram closer I would replace the electrex reg/rectifier to an equivalent without the yellow wire and then use the red/black to feed the battery and all the lights. Not sure why they run the brake light off the red/black and the rest off the yellow wire, maybe as the brake light works with the engine off using juice from the battery. Anyway it's inefficient to split the AC into both AC and DC, better to go all DC and any excess over the light requirements can be used to charge the battery.
 
here's the score. the Electrexworld kit only puts out 65w to the battery. I have electric start and am using a YTX14-BS battery
which is actually only a 12A battery which all works fine, so my idea is to keep that 65w solely for the battery (elec start) and the
other 12v AC is for my 100% LED lighting only. If I cant convert the 12v AC to DC then I will have to do as you say.
Please dont tell me the 65w is to small along with the 12A battery, my concern is converting the one wire 12V AC to DC.
The Briggs and Stratton 2 wire rectifier looks good. There cant be much in that rectifier which would be easier enough to make.
 
Don, is the resistance across the three wires from the alternator the same, or are the windings smaller for one of the phases?
If they are the same, you could junk the reg/rec that comes in the kit and put a 3 phase unit on instead, then you are only playing with DC.

(edited to include pic)
Our beloved Lucas alternators are in "Delta" configuration, typically the coils are the same (more or less)

Electrex World for LED's

In "Y" configuration, the manufacturer can use different coils for different jobs, but you usually see these with four wires.

Since your Electrex alternator has three wires, it's quite possible it is Delta wired, so you have the option of using a standard three phase reg/rec.
 
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"This kit is designed to use a small 4 amp max battery. At 3000rpm the reg/rec should read 14v." so Electrexworld have just informed me. So I may have to scrap this unit and go back to something more conventional. which is fine but I want to retain a crankshaft Ign.
 
"STK-102D is the only lighting kit available for that model and is not compatible with another reg/rec. The only option is a smaller battery." I would of thought the 65w alternator would of charged a battery bigger than 4amp
 
It's hard to tell from the pic on their site, but it looks like the stator has four coils in total.
1 will be isolated low voltage for the ignition.
We can assume the other three are for the electrical supply side.
They look identically sized in the pic, so we just need to know how they are wired.
Electrex World for LED's
If you are getting 65w out of one coil and it is indeed a three phase alternator, doesn't that mean you are getting 195 watt in total?
I know that the manufacturer won't like it, but definitely worth putting a multimeter across the wires and seeing if they are wired how we think they are!
 
update, total 65w, about 80% is to the yellow lighting wire, the other 20% is supposed to be only for brake light and 4amp battery
 
why cant I rectify the yellow lighting wire to DC and run that back to the battery?
 
If it's delta wired you can - it will behave like the standard Lucas RM24
...however, you have about 10 amps less output on the Electrex
 
gtiller said:
Don, is the resistance across the three wires from the alternator the same, or are the windings smaller for one of the phases?
If they are the same, you could junk the reg/rec that comes in the kit and put a 3 phase unit on instead, then you are only playing with DC.

(edited to include pic)
Our beloved Lucas alternators are in "Delta" configuration, typically the coils are the same (more or less)

View attachment 4338

In "Y" configuration, the manufacturer can use different coils for different jobs, but you usually see these with four wires.

Since your Electrex alternator has three wires, it's quite possible it is Delta wired, so you have the option of using a standard three phase reg/rec.
Click to expand...
Looks like the black wire from the alternator is a ground wire. That leaves two wires, single phase a/c output.
 
Since you have no use for AC on a Norton for lighting, you could just leave that wire unused and jumper over to the other side of the regulator where you have positive DC. I run all of my lighting straight off of the battery which is the same as running it off of the positive DC wire coming from the regulator.

I would just cut that little AC wire from the regulator and carefully insulate the end of it. Then you can just hook all your LED lighting into the Red positive wire on the other side of the regulator.
 
madass140 said:
why cant I rectify the yellow lighting wire to DC and run that back to the battery?
Click to expand...
Use the rectifier in the kit. It all works fine. The ac wires are for using ac lighting or going to a rectifier for dc lighting. I have this and I use LED lighting on the entire bike. NO battery.
 
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