Support for Axial Flux PMSM?

[mikejh]

Hi Johannes,

Really impressed with your progress on the inverter. I have built my own DC controller but this AC stuff is next level.
I don't even begin to understand all the math and transforms that go into making this work. Well done!

Can you tell me if this inverter would work with the axial flux permanent magnet motors like the Avid AF140?

I am looking at using one of these for a conversion but having built my own DC controller I find it hard to accept having to pay $12500 USD for a suitable 250KW popular brand controller to run it. This works out to $18K Australian dollars.
I would love to use the AF240 but this requires two of these controllers.
Or better yet the AF430.... 4 controllers required...

I believe they run a resolver but I assume they wouldn't exhibit the reluctance torque that the IPM motors do in the higher RPM's?

Assuming if I used two controllers, each would reference their own resolvers and you would use the CAN bus to command the same throttle signal to both controllers at once?

Thanks.

Mike

[johu]

sorry I missed this post. I think for running a motor without reluctance torque only the MTPA would have to be disabled.

[mikejh]

Hi Johannes,

Thanks for that information. I will have to look up what MTPA is...

I'm only guessing about the lack of reluctance torque, I'm no expert.
My thoughts were that the IPM motors have reluctance torque because the magnets are embedded inside the rotor and at some point the rotor itself starts to create more torque than the magnets. Is that correct?
Or does that only happen due to field weakening.
I need to read up on the theory...

Just thinking that with axial motors the magnets are not embedded and therefore may not have that feature.

Might have to see if I can find a cheap axial motor to test with and purchase a V3 kit.

Thanks again.

Mike