| T O P I C R E V I E W |
| kivdenn |
Posted - Mar 03 2010 : 10:04:46 AM
Good day to you all. I am thinking of making a wind generator by using a wind driven dynamo or motor that produces electricity in return. I have managed to get a 3 phase 400 watt 230VAC motor but its speed is 2800rpm. I know wind generators use low speed motors. Is it possible to rewind this motor to single phase 400watts at 500rpm? The man who sold me the motor said it can only be reduced to a minimum of 900Rpm, can this speed work for me? If it is too high for wind power generation, cant the motor give out up to something like 30V since it is a 230VAC motor? I will be happy for any considerations to my questions.
Dennis |
| 15 L A T E S T R E P L I E S (Newest First) |
| kivdenn |
Posted - May 07 2010 : 12:59:53 PM
Hey you think its difficult? Its not when you have all the material and tools and mind you three weeks is too long actualy I did the alternator its self in three days. Its the tower that wasted most of my time. I will post the phot soon. thanks |
| pebe |
Posted - May 06 2010 : 5:58:30 PM
Dennis, are you saying you made that wind generator in less than 3weeks? I'd like to see a photo of it.
Have you tried to charge a 12V battery? if so, what is the charging current, and at what wind speed? |
| audioguru |
Posted - May 06 2010 : 5:08:25 PM
You never measure the output of a generator or alternator by shorting its output with a current-meter.
There must be a load resistance in series with the current-meter. |
| kivdenn |
Posted - May 06 2010 : 06:53:39 AM
Right now my multimetre only mesures a maximum of 10amps but the out put of the genrator is much higher than that because it heats up the multimetre test probes very quickly so I am thinking of 25 Amps maximum. Thanks for your help. Dennis |
| pebe |
Posted - May 06 2010 : 06:48:05 AM
What would be the maximum charging current you want? |
| kivdenn |
Posted - May 06 2010 : 05:33:45 AM
Sory guys for taking long to reply I have been away, but the generator am talking about is the one I managed to build from the Low RPM wind generator plans I got from otherpower.com here is the link http://www.otherpower.com/wardalt.html its an AC generator which can be rectified and used to charge the battery. The problem is that when it runs too fast it generates avery high voltage about 50V which might damage my batteries I want ideas on how to stablise this voltage to about 15Volts. Thanks
Dennis |
| pebe |
Posted - May 02 2010 : 04:17:02 AM
quote:
Originally posted by audioguru
He said it is a three phase AC motor but he showed an ordinary one phase capacitor start AC motor like a furnace fan motor.
The thread has confused me. He has changed his mind so many times, I don't know what he is using!
First, he said he has tried a 3phase motor but it didn't work. Then he showed a single phase capacitor start/run motor. Then he asked about DC motors. I gave him a link that used AC and DC motors as generators. He finally said he had made a wind generator, but did not specify the type - only the voltage. Then Aaron said he would need a DC to DC converter, so he possibly has decided to use a DC one.
All I want is confirmation. |
| audioguru |
Posted - May 01 2010 : 8:58:08 PM
He said it is a three phase AC motor but he showed an ordinary one phase capacitor start AC motor like a furnace fan motor. |
| pebe |
Posted - May 01 2010 : 4:09:46 PM
Dennis,
Your posting is rather short on detail. What are you using for a generator. Is its output AC or DC? |
| Aaron Cake |
Posted - May 01 2010 : 10:15:05 AM
You need a DC-DC converter. PowerStream makes converters for this purpose. I don't know what is available to you, but around here they even sell such converters at places like Canadian Tire. |
| audioguru |
Posted - Apr 30 2010 : 5:46:29 PM
People on other forums have made high power wind generators with the AC motor from a washing machine.
On the internet there is an article about ussing a furnace fan AC motor to make a high power generator powered from a lawn mower engine. It needs to be "excited" with a battery but they say the residual magnetism of a motor that has been run on AC works fine. |
| kivdenn |
Posted - Apr 30 2010 : 3:59:20 PM
I have managed to make a wind generator but the problem is that its out put voltage flactuates with flactuating wind speeds. Some times at very low wind speeds it is less that 12V and at very high speeds it goes beyond 40V and at this voltage my batteris get realy hot. I fear my batteries might die out soon due to over charging or due high cherging voltage or something like that and its for that reason i want to mantain the output voltage in the ranges of 15V and 17V without wasting the precous power generated by the wind generator. If any one has an idea or a circuit that can solve this please help me.
Dennis |
| pebe |
Posted - Apr 10 2010 : 09:25:16 AM
Here's one lead for starters. But there is a wonderful search engine called 'Google'. Try searching for 'home made wind generators' - there are many more there.
http://www.otherpower.com/otherpower_wind_alternators.html |
| kivdenn |
Posted - Apr 10 2010 : 07:21:17 AM
How do I make a simple low RPM dynamo / motor |
| wasssup1990 |
Posted - Mar 18 2010 : 12:59:55 AM
Increase the windings? I think so. You'll make it more heavy and you'll have more friction, producing a new lower speed. You'll also increase the resistance and heat. The momentum of the armature will be increased. I think it depends on the motor being used. You may wrap more windings on and actually get more speed, then if you keep on winding more turns the speed will start to drop off and won't go any higher for every other wind you make.
If you take windings off you'll produce less magnetically induced force to keep the armature spinning. So the driving force minus the frictional forces will definitely make your motor reach a new lower RPM speed, and also produce less torque. Momentum will also be reduced since the armature weighs less.
All assuming you keep the same power supply voltage.
I think there are a lot of variables and there is no correlation between the number of turns and the speed of a motor. |
