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TMS320F280049C: Question about "speedcalc.h"

Jenson
Intellectual 2465 points
Part Number: TMS320F280049C


Hi Team,

I'm working on a motor drive project and saw speedcalc.h in the universal SDK. I want to use this library.

I see that this library uses radians, but my program uses pu values. I made the following changes, I would like to know if my changes are correct?

My code:

The input of theta is electrical angle (pu value 0~1).

Interrupt frequency 20kHz (50us)

I expect to be able to get the output out (pu value) of the speed, I know that the maximum electrical frequency needs to be added here. But I don't know how to do it.

I used to calculate the speed using: speed (pu value) = angle increment / (time * maximum electrical frequency)

Currently I run this code and out doesn't show the correct speed. Do you have any comments on this?

Thanks

Jenson