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irishron40
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Joined: 22/09/2014
Location: Ireland
Posts: 251

Posted: 08:13pm 10 Dec 2014

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Hi,
Ive build this wind turbine charge controller

http://www.thebackshed.com/windmill/articles/TL084-Controlle r.asp

I have two concerns about this layout.

im a newby to electronics , so could be wrong

1) my understanding is that this controller monitors battery voltage

Ive set low pot to 12v and high pot to 15 volt.

so does this mean my turbine only will give charge to my battery once battery voltage comes below 12volt?

2) and does this also mean my turbine will get power to battery , only when turbine voltage is below 15 volt?

I think that if my turbine supplies 15 volt or more it will set relay to dump mode
Am I correct on thinking this?

and if I am any suggestions please

thank you.

ron

Gizmo

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Joined: 05/06/2004
Location: Australia
Posts: 5078

Posted: 08:30pm 10 Dec 2014

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When the battery voltages goes over 15, the controller will switch to dump mode, until the battery voltage drops below 12v, whereby it will switch back to charge mode.

I think 12v is too low, should be around 13.5

Glenn

The best time to plant a tree was twenty years ago, the second best time is right now.
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irishron40
Senior Member

Joined: 22/09/2014
Location: Ireland
Posts: 251

Posted: 08:39pm 10 Dec 2014

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thx glenn, but seeing that trurbine is connected to battery (relay pin 30 and 87a)

the charge controller will read the voltage from turbine. or am i incorrect?

I think this also means I only have a 3 volt window in wich battery will get charge.

I would like for the battery to get charge anywhere from 12 to 30 volt.

what about a voltage regulator?

thanks Glenn.

appreciate your help.

Ron

Edited by irishron40 2014-12-12

irishron40
Senior Member

Joined: 22/09/2014
Location: Ireland
Posts: 251

Posted: 11:47am 12 Dec 2014

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if anyone knows the answer

just trying to find out if i am correct in thinking that vero board would read high voltage from turbine, and switches to dumpload eventho battery aint charged.

ron

yahoo2

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Joined: 05/04/2011
Location: Australia
Posts: 1166

Posted: 05:11am 19 Dec 2014

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No Ron you are not right.

As I explained to you in your other topic the battery resistance HOLDS THE VOLTAGE DOWN until the battery is charged, it looks after itself, the harder you push current in the higher the battery resistance gets.

A battery will only have lower resistance if it starts to gas off hydrogen and oxygen, this only happens when,
1. battery is way too small for the turbines output
2. battery is damaged
3. battery is fully charged
4. very strong winds

In all these situations as soon as the voltage rises to the set point your controller will switch to the dump load resistor which does exactly the same thing as the battery only with a more aggressive increase in resistance as the current rises.

If you throw the stop switch you are shorting the three phases together so the turbine is electrically locked (stalled).

At no time will you see the turbine open circuit unless you unhook some wires and let it freewheel, then you can measure Voc. Not something I do often in the field as it can be a risk to the equipment and myself if things are windy.

http://www.windstuffnow.com/main/generator.htm light reading

It is up to you what meters you install but I think that DC volts upstream of the contactor is only useful if it is used with the current to calculate watts (like the watson meter with the shunt does)

I find measuring the AC output from two of the phase wires with a multi meter is very neat because I can see the the voltage spool up in light winds.

cheers Yahoo

I'm confused, no wait... maybe I'm not...

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