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RPM Software Estimation in Mitochondrik Telega

#1

Hello,

I was wondering how the Mitochondrik calculates RPM feedback of the motor since I read that the Mitochondrik is sensorless and doesn’t include a sensor for RPM feedback. Is there a document available which explains the RPM sensorless feedback calculation? Does Telega handle the RPM calculation or is this specific to the Mitochondrik?

Thanks!

#2

Hi Matt,

Yes, Telega handles the RPM calculation in the motor state observer. In addition to the speed, the current position of the motor rotor is also calculated in the observer.

#3

Thanks Dmitry! Have the RPM calculations been compared to a sensor’s feedback such as an optical RPM sensor? So the RPM calculation is based off Telega’s control feedback loop in real time?

#4

In synchronous machines, RPM is not an estimated quantity but rather an effected quantity. It is derived by the Telega core based on the current angle which is estimated every ~13 microseconds. The angle estimation error is typically under 15 electrical degrees, excepting rapid transients where it may temporarily exceed this limit.