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Measuring stator output? Measuring stator output?
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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
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Photo by Andy Miller, UK,
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  #1  
Old 21 Aug 2015
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Measuring stator output?
I own a TT600R Begarda, the 5CH/DJ01 model.

I was looking into mounting 2 x 3600 lumen LED lights with a 60 watt total power consumption.

Being that the TTR has no battery, how do i measure how much the stator output is or how much the stator can run?

I know that the stock H4 bulb is 60W/55W, but i was also wondering in case i was to mount other electrics, such as a 12 V charger, GPS, etc.

Stator part number is 5CH814100000
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Old 21 Aug 2015
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I've never had to do that, but the battery is not directly relevant to the output of the stator anyway (as you say, you don't have a battery in any case).

Dan's mc course does have some general advice about testing stators in general; maybe of use?
Dan's Motorcycle

After that, I would try fitting the kit of interest and see if it powers up when the engine is running; I am not clear where you would draw the power from with the very simple circuits - the lights wiring?
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Old 22 Aug 2015
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The important bit is the output voltage.

Measure it with the present set up. This is your base line. Say 13.5 volts.

Add an electrical load .. say another headlight globe ... 55 watts. Does the output voltage fall ... how far? For a battery system you would like the output voltage to remain at 13.5 volts .. for a batteryless system .. above say 12.5 volts would be good.

-------------------------
Electrical loads should be evaluated on their power .. how many watts it is.

The GPS won't be much. But it will like DC .. not AC. And it likes a fairly constant voltage. So you may need some electrickery between the bike and the GPS.

The LEDs too will like DC. They would be more tolerant of voltage variations.

----------------------
What happens if you overload the system?
With a battery - the battery goes flat.

Batteryless .. the stator may burn out.
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Old 22 Aug 2015
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Quote:
Originally Posted by Walkabout View Post
I've never had to do that, but the battery is not directly relevant to the output of the stator anyway (as you say, you don't have a battery in any case).

Dan's mc course does have some general advice about testing stators in general; maybe of use?
Dan's Motorcycle

After that, I would try fitting the kit of interest and see if it powers up when the engine is running; I am not clear where you would draw the power from with the very simple circuits - the lights wiring?
Thanks for the link.

Yes, I would splice into either the head- or taillight.

Quote:
Originally Posted by Warin View Post
The important bit is the output voltage.

Measure it with the present set up. This is your base line. Say 13.5 volts.

Add an electrical load .. say another headlight globe ... 55 watts. Does the output voltage fall ... how far? For a battery system you would like the output voltage to remain at 13.5 volts .. for a batteryless system .. above say 12.5 volts would be good.

-------------------------

The GPS won't be much. But it will like DC .. not AC. And it likes a fairly constant voltage. So you may need some electrickery between the bike and the GPS.

The LEDs too will like DC. They would be more tolerant of voltage variations.

----------------------
What happens if you overload the system?
With a battery - the battery goes flat.

Batteryless .. the stator may burn out.
As I understand a rectifier converts from AC to DC, correct?

The TTR has a rectifier so it should put out DC current I assume. Its headlight stays constant regardless of engine revolutions. Not like some dirt bikes where the lights dim when idling. Another sign of DC current, correct?

It also has a condenser smoother, which should smooth out the voltage. Don't know exactly what it does, but it sounds like it stabilizes the voltage put out.

So I'm already halfway through as I see it?

Quote:
Originally Posted by Warin View Post
Electrical loads should be evaluated on their power .. how many watts it is.
That's why it would be great to know what the generator/stator puts out.

I'd like to hardwire a GPS, mount a 12v power outlet (cigarette lighter style), to charge a phone and swap the whole stock fairing (currently a 55W bulb) to a rally-style fairing with 2x3600 lumen LED light.

Thanks all for the input.
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