Calculation of optimum flux using torque reference
Torque reference Tref
x=(r2/s)(Ls+Lm)2 +(ws(LrLs +LrLm+LmLs)2
)
y=(3/2)(P/2)(r2/s)(1/Ws)(wsLm)2
Flux reference Fref=sqrt(xTref/y)
Where
ws is synchronous speed
s is slip
r2 is rotor resistance
Ls is stator inductance
Lr is rotor inductance
Lm is magnetizing inductance
P is number of poles