09-21-2023, 12:50 AM
After watching Jim Murray's video in full twice, here's what I see..
He is using a very similar rotor. But I do not think it has magnets in it. It's just solid metal (as I see). So he is not really doing the same thing I have in mind.
It seems he is creating a magnetic field with a big coil. Then routing that magnetic field so it is forced to flow through the 45 degree rotor to return to the coil. The 45 degree rotor makes the magnetic flux sweep through the pickup coils at a 90 degrees angle than the direction the motor is turning while it is in route back to the other end of the coil.
It's a very clever idea and method, but I want to continue my way for the following reasons:
1. He is using input power to juice the coil to produce the magnetic field.
2. He is using a big motor to spin a big heavy wobbly awkward rotor
3. He also has to spin counter balance weights because the rotor is so imbalanced.
4. He is making the flux travel through a good amount of core material
The advantages of the magnet spiral rotor I am building (as I see it) are:
1. Lightweight rotor that spins true - no big wobbly hunk of metal.
2. Way less Eddy currents. Only the pickup coil's core.
3.. No need for counter balances
4. No input power needed to get the magnetic fields
5. Possibility of using multiple coils and getting multiple output phases
6. Less wind resistance / better aerodynamics
Now I had to redesign mine because I realized I have no way to spin it with the above design. There is no shaft! So I resolved that with an altered design which is printing.. But it will take a bit longer now. Hoping it comes out good.
I have some other thoughts on the matter but I will reserve them until we have some real data on this design.
He is using a very similar rotor. But I do not think it has magnets in it. It's just solid metal (as I see). So he is not really doing the same thing I have in mind.
It seems he is creating a magnetic field with a big coil. Then routing that magnetic field so it is forced to flow through the 45 degree rotor to return to the coil. The 45 degree rotor makes the magnetic flux sweep through the pickup coils at a 90 degrees angle than the direction the motor is turning while it is in route back to the other end of the coil.
It's a very clever idea and method, but I want to continue my way for the following reasons:
1. He is using input power to juice the coil to produce the magnetic field.
2. He is using a big motor to spin a big heavy wobbly awkward rotor
3. He also has to spin counter balance weights because the rotor is so imbalanced.
4. He is making the flux travel through a good amount of core material
The advantages of the magnet spiral rotor I am building (as I see it) are:
1. Lightweight rotor that spins true - no big wobbly hunk of metal.
2. Way less Eddy currents. Only the pickup coil's core.
3.. No need for counter balances
4. No input power needed to get the magnetic fields
5. Possibility of using multiple coils and getting multiple output phases
6. Less wind resistance / better aerodynamics
Now I had to redesign mine because I realized I have no way to spin it with the above design. There is no shaft! So I resolved that with an altered design which is printing.. But it will take a bit longer now. Hoping it comes out good.
I have some other thoughts on the matter but I will reserve them until we have some real data on this design.