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mechamz
Starting Member
Singapore
2 Posts |
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optixelectrics
New Member
United Kingdom
72 Posts |
Posted - 29/06/2008 : 12:29:23
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Hi Mechamz,
Are you in a low wind site? one of the problems you will have is for example, that you can make 12V at low revs using a 48V futurenergy, or a SC120 at very low revs, but the problem is that you will need significantly bigger blades than normal to overcome the stall that will occur when the turbine hits 12V. The other problem is current. The higher voltage turbines are designed to make 1KW in a 28mph at 48V (at roughly 20 amps). If you have the blades to push the alternator round, and overcome the stall, then you will very quickly exceed the maximum rated current of the alternator coils, which will melt it!! (and render it useless).
Myk |
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mechamz
Starting Member
Singapore
2 Posts |
 Posted - 29/06/2008 : 15:35:25
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quote:
Originally posted by optixelectrics
Hi Mechamz,
Are you in a low wind site? one of the problems you will have is for example, that you can make 12V at low revs using a 48V futurenergy, or a SC120 at very low revs, but the problem is that you will need significantly bigger blades than normal to overcome the stall that will occur when the turbine hits 12V. The other problem is current. The higher voltage turbines are designed to make 1KW in a 28mph at 48V (at roughly 20 amps). If you have the blades to push the alternator round, and overcome the stall, then you will very quickly exceed the maximum rated current of the alternator coils, which will melt it!! (and render it useless).
Myk
ya, a relatively low wind site. It's around 3-4m/s
any idea?
looking for low rpm alternator |
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Low rpm alternator?
