If the rotor and stator have the same number of poles when that all the poles face their counterparts at the same time produce the cogging.
Is it possible to have a different number of poles in the rotor and stator so only one pair of poles lined up at any time around the circle? that is like ie: 5 magnets vs 6 coils. or make the polar pieces "slanted" so their magnetic fields engage gradually to each other, overlapping like the outside "squirrel cage" poles of the original ceiling fan.
@RDELAPLAZA I've seen designs where the magnets are placed at an angle (or alternatively the pole laminations are set at an angle) and that has reduced the cogging significantly. At least that is what I was told, I haven't tried it myself. But the little turbines I am working with are sensitive to friction and such. Maybe not a Savonius so much; they have pretty good torque. Pole pieces may be worth a try.
Why you didn't use some sort of polar pieces on the coils to make them more efficient capturing the magnetic flux of the magnets? to close the magnetic circuit of the ?generator
@RDELAPLAZA True, that would make the generator stronger. But pole pieces also make the generator "cog." That is, the magnets get attracted to the pole pieces and it takes some force to move them off. There are ways to reduce cogging, but it is hard to eliminate it.
If the rotor and stator have the same number of poles when that all the poles face their counterparts at the same time produce the cogging.
Is it possible to have a different number of poles in the rotor and stator so only one pair of poles lined up at any time around the circle? that is like ie: 5 magnets vs 6 coils. or make the polar pieces "slanted" so their magnetic fields engage gradually to each other, overlapping like the outside "squirrel cage" poles of the original ceiling fan.
RDELAPLAZA 5 months ago
@RDELAPLAZA I've seen designs where the magnets are placed at an angle (or alternatively the pole laminations are set at an angle) and that has reduced the cogging significantly. At least that is what I was told, I haven't tried it myself. But the little turbines I am working with are sensitive to friction and such. Maybe not a Savonius so much; they have pretty good torque. Pole pieces may be worth a try.
Caleb6543 5 months ago
Why you didn't use some sort of polar pieces on the coils to make them more efficient capturing the magnetic flux of the magnets? to close the magnetic circuit of the ?generator
RDELAPLAZA 5 months ago in playlist More videos from Caleb6543
@RDELAPLAZA True, that would make the generator stronger. But pole pieces also make the generator "cog." That is, the magnets get attracted to the pole pieces and it takes some force to move them off. There are ways to reduce cogging, but it is hard to eliminate it.
Caleb6543 5 months ago
wood it make enough power to run a fan heater??
coyleo1111 1 year ago
@coyleo1111 It all depends on how much wind you have. :-) But I doubt it.
Caleb6543 1 year ago