Dear readers, please refer to the linked diagram and advise if I am doing this correctly. The object is to produce a rotating magnetic field using only two signals - the second being shifted 90 degrees from the first.
This means only to amplifers are required.
How is different in effect from using a commutator (or four phase delayed waveforms ) to sweep from one coil to the next? IOW in the first case, all coils are active, but at differing phases. In the second, only one coil is active at a time.
IOW how does this affect the "type" of generated field?
In practice all the coils would be rotated so they are vertical.
Thank you,
Chris Warren