I just finished building the same with automotive relay coils . Works very well even at 5 volt USB output . I have experimented with a few different configurations now and best rpm was in repel mode with very small magnets on rotor and 1 tiny magnet in repel mode on furthest away side of coil. Incredible low current and I could hear rpm increase with 1 magnet on coil . Placement of reed switch from top and not the side also improved rpm as it reduces magnetic interaction with rotor magnets but still switches
Simple yet elegant. Very good video and great explanation. At about 8:08 to 8:19 you can see it go through it's harmonic windup and becomes more stable from the gyro effect.....I guess. I might have to get my young grandson involved in building one of these. Thanks for sharing.
EXCELLENT video as always.Keep up.I will make the motor and 3d print a housing or stand, and ill put it in a dome with a battery to run for a long time.
I'm always impressed by coils using such fine wire. Wire of 40 AWG is fragile and difficult to handle. How do you make electrical connections to the coil, such as the reed switch? Do you attach thicker wire to the coil ends so it's easier to handle?
If you use driver circuit from, Solar Rocker toy and use Many small Neodymium magnets in the Pulse motor rotor. Then you should be able to bring the power draw down to around 15.2 Micro amps as I had done 👍🙂.
This motor would to move in the space without a power supply. Good solution for ISS. Space agency could to test this device and seriously considerate using that.
Greetings everyone. Hello. 1:17 is the rotor part of a video cassette ??? I have one. 6:30 math !!! My Kryptonite ... this engine is super quiet. Question: What is the maximum speed of this type of engine ??? Very good. Congratulations. Success.
The speed of an DC motor is proportional to the voltage, where as a AC motor speed is proportional to the frequency and field windings. If you count the turns it made at one volt and note the time you should be able to figure it out, an engine can be a motor but a motor can't be a engine, a engine has to have a combustion ether internal as a gas powered car truck ect, or external like a locomotive (old steam train) steam power tractor.
Le Z Hey I did some math on this thing using a metronome and came up with 13.75 RPM, but my metronome only goes down to 20 beats per minute, so I doubled that to 27.5, I played the metronome and video together and it seemed to be just a blonde one out of time, my metronome is digital with a tap button to set it, I used that when he had it running at 8 volts and got 110 RPM, there is a error in my maths but it's very small, keep in mind I'm watching the same video you are, I'd say 13.5 turns per volt would give you the speed. He had "maxed" his power supply out at 30 volts. So the maximum speed is 30x13.5= 405 RPM. Of course it will go faster if you put more volts to her. As a side note they's number are only relevant to this motor there cheap motors in toy cars that do 1200 RPM on a 1.5 volts, but they also need 500 mA and that's lot more current then this is.
Nice. What if you use 20 pounds then will you need even less volts? What is the best efficiency then to weight to volts ratio if friction was not an issue?
Not sure how you can increase weight without increasing friction if you use any sort of contact bearing, you can't flippantly dismiss friction as a non-issue in heavy machines. Volts and Amps multiply into power transmission across the magnetically-coupled circuit, increasing one usually decreases the other or produces excess heat, the optimum balance depends on the circuit implementation and component properties, different materials and part geometries will shift power efficiencies (and losses) in different ways. In practice the maximum thresholds would probably be how fast your bearing can spin or how much heat your magnets can endure without weakening.
