The old WHITE machine started out with six of the 3" magnets with 3" between each one. The last rotor I had in it had 12 of the 1" x 1" magnets and it is the one in a LOT of the videos I have posted from Greyland's shop. It had no sleeves around those magnets and worked fine. It was outputting 130V per coil pair at a little over 2 amps per pair at 2800 RPM with the OLD CORE MATERIAL, and about 85-90 % of that with the NEW core material. Voltage was close to the same, but amps went down.
I had high hopes that the new BLACK machine, running at a higher rpm with TWICE the magnets would put out more power. It did not. When I put in a NEW rotor with only 20 magnets instead of 24 to give more space between magnets, I saw no improvement. When I removed HALF the magnets in THAT rotor, bringing the total down to 10, which is CLOSER to the original machine's 12 magnets, it still did not achieve even CLOSE to the output per coil pair seen on the OLD machine with the NEW core material.
It is my suspicion that the large steel plate on top of the BLACK machine to which the motor is mounted that is less than 3/4" above the rotor is causing the problem. We will find out as testing progresses. If that turns out to be the problem, we can go to a direct drive (vs belt drive) motor like the WHITE machine has, and I still have the old 24 magnet rotor I can put back in. But we want to get it outputting first. Testing the old and new coils on the old machine is the first step. They are working on it. Unlike me, they both have full time jobs and small children, so time is a premium. I have my own projects, so I am in no hurry to get drug back into that one.
I had high hopes that the new BLACK machine, running at a higher rpm with TWICE the magnets would put out more power. It did not. When I put in a NEW rotor with only 20 magnets instead of 24 to give more space between magnets, I saw no improvement. When I removed HALF the magnets in THAT rotor, bringing the total down to 10, which is CLOSER to the original machine's 12 magnets, it still did not achieve even CLOSE to the output per coil pair seen on the OLD machine with the NEW core material.
It is my suspicion that the large steel plate on top of the BLACK machine to which the motor is mounted that is less than 3/4" above the rotor is causing the problem. We will find out as testing progresses. If that turns out to be the problem, we can go to a direct drive (vs belt drive) motor like the WHITE machine has, and I still have the old 24 magnet rotor I can put back in. But we want to get it outputting first. Testing the old and new coils on the old machine is the first step. They are working on it. Unlike me, they both have full time jobs and small children, so time is a premium. I have my own projects, so I am in no hurry to get drug back into that one.
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