Grossel
Well-Known Member
Hi.
I've had some thaughts about this recently, but is unsure.
If I had three H-bridges, in theory I could easilly drive a 3phase stepper (I call it a stepper just for short). And if all H-bridges only could provide low and high voltage out, then I could run it and speed is totaly dependent on clock frequenzy.
But if I had a H-bridge that could have a off-state/high z/not connected output, then I could on each phase do this:
* When a phase normally would go from positive to negative, the driving H-bridge instead goes in off-state.
Question is: If I was able to measure this voltage on the non-connected stepper wire, what kind of waveform could I expect?
Also, when torque increase, I guess that this waveform would be compressed to some degree.
Goal here is to find out how I can make a cd-spinner motor run like a normal motor without using hall sencors.
Thanks
I've had some thaughts about this recently, but is unsure.
If I had three H-bridges, in theory I could easilly drive a 3phase stepper (I call it a stepper just for short). And if all H-bridges only could provide low and high voltage out, then I could run it and speed is totaly dependent on clock frequenzy.
But if I had a H-bridge that could have a off-state/high z/not connected output, then I could on each phase do this:
* When a phase normally would go from positive to negative, the driving H-bridge instead goes in off-state.
Question is: If I was able to measure this voltage on the non-connected stepper wire, what kind of waveform could I expect?
Also, when torque increase, I guess that this waveform would be compressed to some degree.
Goal here is to find out how I can make a cd-spinner motor run like a normal motor without using hall sencors.
Thanks