Window Motor Runs Window Motor.
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Uploader Comments (DadHav)
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All Comments (36)
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@DadHav Good info. I didn't know you were using an iron core! Good info. Yes, that would increase the inductance.
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@DadHav So I'm sure you already know this. But regenerative acceleration is extremely simple, and most people over complicate it. If you have a coil of wire, it has inductance. If you have a lot of turns, you have higher inductance. High inductance coils cannot change polarity (north/south) quickly. If you spin the magnetic rotor faster than the coils can change polarity - you get Lenz reversal, A.K.A. regenerative accelration!
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I'm sorry to say, I mostly just slap this stuff together. There's really nothing difficult about the builds.
John
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As much as I love the Window motors, I think more people should be studying the Adams motor. I have a 50 page article about the Adams motor. When you spin a rotor with NSNSNS magnets on it, at a high enough speed, the pickup coils will produce the inverse of Lenz's drag, and will actually cause acceleration - what Thane Heins has been showing in his videos. I think this is fascinating and more people with machining skills should be building these motor/generators.
supermuble 2 weeks ago
@supermuble
Thane definitely has some good video. Actually these motors will exhibit the principle too. When I drive them up over 2,000 RPM they will tend to speed up and have the current go down. Maximizing the effect is the trick. I am going to look into it more.
Thanks
John
DadHav 2 weeks ago
@DadHav I think Windows motors, without having any real useful inductance in the air core coils, would not have the regenerative acceleration effect. In my understanding, you need to have iron core coils, with a lot of turns of wire, which makes a very high inductance coil. If the coil is an air core, like on a window motor, then the inductance is so high, that the frequency where Lenz's law reverses, would be like 30,000 RPMs or higher? Just guessing.
supermuble 2 weeks ago
@supermuble
You certainly might be right about what your saying. There is a two pound mild steel rotor in the center of the coil and it does change the inductance of the coil. That along with 500 turns on the coil makes a fair inductor. I have no problem getting the motor to 15K RPM's but I don't want to experience another magnet coming loose. I'll study up on Lenz law a Little bit. Thanks for the heads up.
J
J
DadHav 2 weeks ago
@DadHav 15K Rpms? Wow!
supermuble 2 weeks ago
@supermuble
Ha,ha, Ya great fun but a little scary. I have a little window motor going 20,000 in one of the other videos. At one time I had a video up on the Tube with a window motor going so fast it would balance on a corner of the base like a gyroscope. I took it down because of how dangerous people though it was. There's another rotor that has an unusual magnetic effect. Take a look at the notch rotor on one of the other videos some time. .
Take care.
John
DadHav 2 weeks ago