Salvador12
Full Member level 4
Hey, a while ago I asked here about mosfet switching in a row. I managed to build a chaser based on shift register logic that worked like a "LED chaser"
Now what I want to do is build a simple axial stator , (already have the laminations) where the field actually rotates, so instead of using DC to sequentially switch poles ON/OFF , I want to use an AC sine wave and simple switch the coils on the stator on/off in a sequence while the coils themselves are all parallel, so the magnetic field itself is that of the AC sine wave, but it's location moves together with the poles.
Here is a simple drawing of the idea, the question is what switching topology to best implement to achieve this goal?
My own idea, at least partly is to use a shift register (which I already have) to accomplish the drive signal that could drive the switches in sequence.
So in the drawing I have 8 poles, or 4 pairs, the idea is that at any given time only 3 pairs are ON and one pair is OFF. Any two to three poles that are adjacent have the same flux direction,
The shift register just relays the signal to the switches such that it leaves the switches for the OFF pole pair that is moving around in the OFF position which then moves along.
With 9 poles and 4 pairs and one coil for each pair that is wound in opposite direction on each pole I would have only 4 wire pairs where in theory I could tie together the 4 ends and use the 4 inputs to drive the sequence, what do you think?
Any advice is welcomed.
Now what I want to do is build a simple axial stator , (already have the laminations) where the field actually rotates, so instead of using DC to sequentially switch poles ON/OFF , I want to use an AC sine wave and simple switch the coils on the stator on/off in a sequence while the coils themselves are all parallel, so the magnetic field itself is that of the AC sine wave, but it's location moves together with the poles.
Here is a simple drawing of the idea, the question is what switching topology to best implement to achieve this goal?
My own idea, at least partly is to use a shift register (which I already have) to accomplish the drive signal that could drive the switches in sequence.
So in the drawing I have 8 poles, or 4 pairs, the idea is that at any given time only 3 pairs are ON and one pair is OFF. Any two to three poles that are adjacent have the same flux direction,
The shift register just relays the signal to the switches such that it leaves the switches for the OFF pole pair that is moving around in the OFF position which then moves along.
With 9 poles and 4 pairs and one coil for each pair that is wound in opposite direction on each pole I would have only 4 wire pairs where in theory I could tie together the 4 ends and use the 4 inputs to drive the sequence, what do you think?
Any advice is welcomed.
