
FOC: Field-Oriented Control 24-21
manner, using reference value of the stator q-axis current component. Since ω
sl
= ω
r
− ω, then rotor ux
speed of rotation can be calculated as
. en from (24.34) and (24.29) it follows that
ω
ψ
sl
m qs
r r
L i
T
*
*
*
=
(24.37)
φ ω ω ω θ ω
r r sl sl
dt dt dt= = +
= +
∫ ∫ ∫
*
*
(24.38)
us, calculation of the rotor ux position requires only measurement of the rotor position. However,
stator current measurement is still necessary for the CC of the power supply.
RFOC scheme in which the rotor ux position is obtained by means of (24.37) and (24.38) is known
as indirect rotor ux oriented control (IRFOC) scheme. ...