Harold in CR wrote:
I posted in another forum, about changing to PM, but, was told it won't work well. Are you still playing with AC ? Do you plan on doing a home brew controller, similar to Tomdb ?
I am going stateside next week and can purchase used items reasonably. Just don't know squat about electronics, yet. I DID buy a recommended book, though.
I'm very interested in this for low voltage, 120V or so for moto conversions.
I think that for this motor the magnets modification can be difficult as it has 72 stator elements, but I don't know if this means 72 magnets, or just 8 magnets as it has 8 poles. Anyway it seems too much work, and I want to experiment ACIM motors.
Yes, I would like to build an inverter, but I am not sure if at this moment it makes sense as there are big amount of open source projects.
I think this motor can be good up to 20 HP with the original configuration working at 115V, or if doing the conversion star to delta it could be ran at 72V (for 20 HP), or at higher voltage, say 144V for 40 HP, but I still want to see the efficiency figures when the right voltage is applied. I need to know if I have to expect the 60% eff values during light operation (low speed/low torque), or 80% eff values (with the delta configuration)
Anyway, I don't think I am going to use another motor, at least for this project.
Indeed, I would like to see how far can I go with this motor, as a personal challenge, even I have to use high voltages and IGBTs such as 300V, but I am not sure how much time I could expend on this