PMSM current controller Vph max limit
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Sriram M A
el 14 de Feb. de 2023
Respondida: Sabin
el 16 de Feb. de 2023
Hello,
In the PMSM FOC model, Inside the current loop, Vph max input to the current controller is given as Vdc/(root 3) . Is there a specific reason for using this value or is it dependant on what control scheme you are using . Incase im using SVPWM control what value should i use as Vph max .
Thank you
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Sabin
el 16 de Feb. de 2023
Hi, VphMax is dependent on the modulation technique used. If we have Space Vector Modulation the maximum amplitude of the phase voltage is Vdc/sqrt(3). If we have Sinusoidal Modulation then VphMax=Vdc/2. The maximum amplitude can be increased in the overmodulation region, for example in six-step operation we can get (2/pi)*Vdc. I hope this helps.
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