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Forum Index : Windmills : what diode?
| Author | Message | ||||
daggit Newbie  Joined: 19/07/2009 Location: United StatesPosts: 12 |
getting closer to completing my windmill. what kind of diode do i use to connect my dc motor to my battery bank? Like this one? shooting at the dark |
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Gizmo Admin Group  Joined: 05/06/2004 Location: AustraliaPosts: 5119 |
Hi Daggit What sort of power/amps are you expecting? Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| davef Guru  Joined: 14/05/2006 Location: New ZealandPosts: 499 |
I do not understand what you are trying to do? If the DC motor is rated to work at the battery voltage you just connect it directly. |
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| daggit Newbie Joined: 19/07/2009 Location: United StatesPosts: 12 |
I don't know what kind of power I'll get for sure. I know it wont be over 40 amps from my treadmill motor (hoping maybe 6-10 amps) but I might add another smaller windmill. I KNOW it wont make 100 volts. If you hook it up to the battery directly the voltage could flow backwards to the spinning the dc motor right? shooting at the dark |
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| Gizmo Admin Group Joined: 05/06/2004 Location: AustraliaPosts: 5119 |
A treadmill motor would only supply a few amps, maybe 10 amps at the most, so you can use a cheap diode. Diodes can be conneced in parallel, to increase the total current handling capacity. A 1N5404 is rated at 3 amps, 400 volts, and worth about 25 cents. 4 connected in parallel will give 12 amps at 400 volts. For the price, grap a couple extra and add them to the circuit, just to be safe. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| Gizmo Admin Group Joined: 05/06/2004 Location: AustraliaPosts: 5119 |
Hi Daggit Davef's right, without the diode, the motor, used as a generator, will act like a motor. When there isnt enough wind to charge the battery, the battery will drain into the motor and spin the blades. Glenn The best time to plant a tree was twenty years ago, the second best time is right now. JAQ |
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| daggit Newbie Joined: 19/07/2009 Location: United StatesPosts: 12 |
hmm, i think i already have some of those  shooting at the dark |
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| daggit Newbie Joined: 19/07/2009 Location: United StatesPosts: 12 |
by the way the one I have a link posted to would work right? Those little bitty ones seem so small to put in the power line. Is there I nice looking way to wire those? shooting at the dark |
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