Part Number: TMS320F28069F
Hi
I have a problem with understanding and calculation of flux linkage for my PMSM motor.
My motor datasheet params:
Ke=42 (Vrms Line-to-Line)/(kRPM)
Kt=0,67 Nm/A rms
i have also measured using oscilloscope Ke VpeakLine2Line=60V felectrical=79,364 -> Ke=44,54VrmsLL/kRPM
Poles = 10, poles pair = 5
e2e.ti.com/.../teaching-your-pi-controller-to-behave-part-ix
According to Dave's blog to convert form VrmsLL/kRPM to V_LNpeak i have to multiply Ke by sqrt(6)/(50*Poles).
this conversion factor i understand as sqrt(2) - RMS to Peak 1/sqrt(3)=sqrt(3)/3 - Conversion voltages from LL to LN. 60/(1000 * 2 * pi) - conversion kRPM to rad/s
so sqrt(2)*sqrt(3) * 60 / (3 * 1000 * 2 * pi * Poles/2) -> sqrt(6) / (50 * pi * Poles). The converter value should be equal Flux Linkage in SI units.
Now i try to verify my Kt=3/2 * Poles/2 * Flux (or Ke calculated above) * (1/sqrt(2) - (to convert Arms to Apeak)
Flux=0.0695
Kt=0,3685 <- two times lower then in datasheet (Kt=0,67)
Why i get results two times lower? Where is mistake?
