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Engineering
Mechanical Engineering
Is a Larger DC Motor Needed for Low Wind Speed Power Generation?
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[QUOTE="PNW Hobbyist, post: 6834204, member: 731844"] Well, it does seem to work better than the alternatives I have tried so far. I plan to explore a hybrid design combining the savonius (to get it rotating at all) and perhaps a darrieus style in one rotor (to help it gain RPM once it's spinning at all). I my abandon all of those options and go with something else entirely, but first I need to learn enough to understand how I can get past the inertia of the motor in the first place. While your advice to abandon the savonius design is interesting, I notice you didn't address my actual question nor make any constructive suggestions... The idea here is to harvest small amounts of power from the kinetic energy of low wind speed. Don't need much. A little will do. But so far, I cannot get the motor to spin at all with the amount of torque I am getting from the rotors. Is that a limitation of physics, or is that a limitation of the cheap motors I've been experimenting with? I may have answered my own question by digging deeper into specs on motors, but I am still not sure I understand what they mean. For example, does Starting Torque refer to the force necessary to spin the motor mechanically (as a generator), or the amount of torque it will generate when I apply current to it (using it as a motor)? If I could understand how to identify the amount of force necessary to start spinning the motor at all, the rest would be simple math. I was hoping there was an industry standard way of measuring this so I don't have to just start buying lots of motors and testing them one by one. [/QUOTE]
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Is a Larger DC Motor Needed for Low Wind Speed Power Generation?
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