FOC Control and Resolver input

michaelmichael9139 · ‎2014-07-29

Posted on July 29, 2014 at 18:04

Hi,

I have a PMSM which I'm planning to run sensor-less.

In case I run into problems with the sensor-less the motor I'm using also has a resolver fitted. I have a Resolver Decoder from analog devices so I'm wondering if I can read this over the SPI bus and input it to the FOC algorithim? Or should i use the quadrature outputs from the resolver deocder IC and run these digital inputs into the STM32.

If i had more time I'd play around with some sample and hold circuits and use the spare ADC to sample the SIN/COS signals coming from the resolver and decode them into position in the STM32. But that's a little bit off for now.

Regards,

David Powell

Dino COSTANZO · ‎2014-08-12

Posted on August 12, 2014 at 17:44

Dear David,

straightforwardly, you can connect the quadrature outputs to STM32 and enable encoder as auxiliary sensor; this way, for instance by enabling the DAC functionality, it's possible to compare - runtime - angle measurements from sensorless and resolver.

SPI is possible but need some FW development, of course.

Regards,

Dino