How do you determine the number of poles in a rotating machine given the machine

Question

How do you determine the number of poles in a rotating machine given the machine's speed and access to an oscilloscope? Why are feedback controllers necessary when using power electronic converters? What are benefits and drawbacks? What switching combinations are allowed when using an inverter? Why are some switching combinations forbidden? Compare the benefits and drawbacks of using dSpace versus using the FPGA. What type of filter should be used when filtering the output of a 1-phase inverter? Why?

Explanation / Answer

Measure the generated voltage frequency using the osilliscope . And since the speed of rotating machine is known you can find the number of poles using formula :

Number of poles = 60 * f / N

where , f is voltage frequency

N is speed of rotating machine

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