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Hey everyone, i have a slight problem that i need some help solving.
In my aerospace class everyone was divided into groups and assigned a project to build a mini wind turbine (must fit into 1ft cube). now i have a small motor that i plan on using but when i tape the axle to a drill and give it full power, it only produces 1v on my multimeter.
My question is how do i turn a AC to DC step down transformer (from a wall wart) into a DC to DC step up transformer, and if that is impossible, how do i make my own.
Registered Member #27
Joined: Fri Feb 03 2006, 02:20AM
Location: Hyperborea
Posts: 2058
Take two steps back and find out what kind of power you will get at a realistic RPM. You need to measure the current as well as voltage. When you know that you have enough information for the next step.
It sounds to me like your motor is not suitable as a generator.
Registered Member #3900
Joined: Thu May 19 2011, 08:28PM
Location:
Posts: 600
use a geared motor that is geared towards lower speed high torques. if you have enough wind power to move it, the motor will go a low faster and generate higher power outputs. low friction of coarse. search dc-dc, smps, and boost converter. depending on how much voltage and current you want out use the one that fits your needs. what do you intend to power?
Registered Member #2901
Joined: Thu Jun 03 2010, 01:25PM
Location:
Posts: 837
How about a bike dynamo? (Googling a bit, people have used PC fans as well ... but I don't think they could take the power from a 1 foot diameter rotor)
Registered Member #3900
Joined: Thu May 19 2011, 08:28PM
Location:
Posts: 600
you wont get a propper reading with the refresh rate of a digital multimeter. do you have any analog voltage scales? and Bjørn is right, why do you have a transformer?
if you cant find an analog meter, find a low voltage drop bridge rectifier and feed the motor terminals into the ac leads (because while a motor wont have an ac signal, it will have voltage spikes and oscillations). then use a filter cap on the output and measure the voltage there.
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[moved] Wind Turbine Step-Up
