DC Voltage regulation

[[email protected]]

I have a 12 volt dc 690 rpm permanent magnet motor that I'm wanting to
use as a wind generator. The problem is that when I spin the shaft at
15 to 20 mph it produces 30 to 45 dc volts. I would like to regulate
it down to a constant 14 volts or figure out how to convert it to ac
voltage . Any ideas

Thanks,
Mark

 

[Homer J Simpson]

I have a 12 volt dc 690 rpm permanent magnet motor that I'm wanting to
use as a wind generator. The problem is that when I spin the shaft at
15 to 20 mph it produces 30 to 45 dc volts. I would like to regulate
it down to a constant 14 volts or figure out how to convert it to ac
voltage . Any ideas

There are a ton of sites on the web and books on home power generation. I
bet your library has one or two.

 

[kell]

I have a 12 volt dc 690 rpm permanent magnet motor that I'm wanting to
use as a wind generator. The problem is that when I spin the shaft at
15 to 20 mph it produces 30 to 45 dc volts. I would like to regulate
it down to a constant 14 volts or figure out how to convert it to ac
voltage . Any ideas

Thanks,
Mark

Run, don't walk to
www.fieldlines.com

I presume you cite 14 volts because you want to charge a battery bank
with it. The battery bank will hold the voltage down without use of a
regulator. You can use a dump load to keep from overcharging.
Regarding turbine stalling and various other issues, I am not
qualified to address them, but you will meet some real whizzes at
fieldlines that have impressive experience and knowledge of
alternative power.

 

[[email protected]]

Run, don't walk towww.fieldlines.com

I presume you cite 14 volts because you want to charge a battery bank
with it. The battery bank will hold the voltage down without use of a
regulator. You can use a dump load to keep from overcharging.
Regarding turbine stalling and various other issues, I am not
qualified to address them, but you will meet some real whizzes at
fieldlines that have impressive experience and knowledge of
alternative power.

Can you explain Dump Load? Is this done with resistors and a contactor?

 

[kell]

Can you explain Dump Load? Is this done with resistors and a contactor?- Hide quoted text -

when the batteries are charged, you need to "dump" the power the wind
turbine is putting out. You need a load; just disconnecting the
turbine electrically is a very bad idea because then there is no
resistance, and the turbine can overspin and destroy itself (this
does happen).
And yes, you could use a contactor and resistors, but they must be
very high power resistors. Some people use a water heater as a dump
load, for example. You will need a dump load controller circuit. I
could talk about it in theory but since I lack hands-on experience I
won't presume to advise you. I suggest you go to fieldlines.com and
search the site for information about dump load controllers, then go
on the board and make a post asking for advice.
That way you'll have demonstrated that you have already put a little
effort in by searching before requesting help, and you will get more
respect on the board.

 

[Jamie]

when the batteries are charged, you need to "dump" the power the wind
turbine is putting out. You need a load; just disconnecting the
turbine electrically is a very bad idea because then there is no
resistance, and the turbine can overspin and destroy itself (this
does happen).
And yes, you could use a contactor and resistors, but they must be
very high power resistors. Some people use a water heater as a dump
load, for example. You will need a dump load controller circuit. I
could talk about it in theory but since I lack hands-on experience I
won't presume to advise you. I suggest you go to fieldlines.com and
search the site for information about dump load controllers, then go
on the board and make a post asking for advice.
That way you'll have demonstrated that you have already put a little
effort in by searching before requesting help, and you will get more
respect on the board.

yeah or, more batteries! why waste power when you should be storing it!
Sell it off!