Zero Communication Redundancy?

[Username1]

I’m wondering if the following scenario is technically possible:

• Two sets of 3-phase windings who’s rotor(s) are joined together (either separate motors linked together OR a split “6-phase” motor)

• These separate 3-phase windings are each connected to their own controller.

• Using a motor architecture that makes it physically impossible for these individual 3-phases to be active at the same time - without any communication between the controllers.



This is an idea I had for a totally redundant electric unicycle, where the entire power train (battery, controller, phases) is duplicated and made 100% separate from the other (even including communication).

If bullet point #3 is somehow possible, the controllers would simply operate exactly 50% of the time, rapidly switching back and forth as the rotor spins. The beauty is neither one knows the other even exists, nor can they interfere with each other. They simply adjust the PWM to keep the wheel balanced during their turns, and if the other controller stops then it just has to work twice as hard during its turn.

As for how this might be possible I’m no electrical engineer or motor export. All these stator and rotor poles and timing sequences confuse me, so maybe someone else can explain if this is possible.

 

[Gruesome]

For true redundancy you want them to drive separate wheels.

 

[Username1]

We’re talking about electric unicycles though. It’s a real mode of transportation with unique benefits.

I want to see them go fully redundant, because it’s more vital on this PEV than any other. This exact method I’m describing isn’t the only way, but I thought the idea of 0 communication redundancy was interesting. I just don’t know enough about how motor switching works to wrap my head around this yet.