Magnet motor in Argentina

[silverdragonrs]

hartiberlin - can you do a femm sim on a settup using 1/8 inch thick neos standing virticle on the stator. (flat side pointing at rotor)

thanks

danny

[orionjf]

Then we have the first issues:
- NdFeB magnets only
- Distant between rotor and stator as a important design parameter.
- Different magnetization power between rotor and stator.
The last issue is a problem: if you have similar rotor and stator magnets, the work you need to push down stators looks like similar to torque (experiments seem to confirm it). If different (rotor bar for instance), we would have a "better net torque" (simulations and experiments confirm it) but a potential demagnetization proccess can be done. I think it is very important to model demagnetization versus field stress.
PD. A "better net torque" doesn?t mean a positive net torque that means the device works. It is not confirmed yet.

[Jdo300]

hartiberlin - can you do a femm sim on a settup using 1/8 inch thick neos standing virticle on the stator. (flat side pointing at rotor)

thanks

danny

What are the dimensions of the neos?

[Jdo300]

Then we have the first issues:
- NdFeB magnets only
- Distant between rotor and stator as a important design parameter.
- Different magnetization power between rotor and stator.
The last issue is a problem: if you have similar rotor and stator magnets, the work you need to push down stators looks like similar to torque (experiments seem to confirm it). If different (rotor bar for instance), we would have a "better net torque" (simulations and experiments confirm it) but a potential demagnetization proccess can be done. I think it is very important to model demagnetization versus field stress.
PD. A "better net torque" doesn?t mean a positive net torque that means the device works. It is not confirmed yet.

If you know what kind of neo or ceramic magnets you have, you can look up the demagnetization information on any magnet manufacturer's website. Thats what I was mentioning earlier concerning BH curves. Also, if demagnetization becomes a big issue later, then it may be better to simply run the motor in attraction mode.

[silverdragonrs]

harddrive neo - 1/8 inch thick, aprox 1.2 centimeters by 2 centimeters (originally had curves but have been filed down to this size <---- don't know if that would effect the power of the magnet or not, just had trouble moutning on curve)