X. Yu et al., Phase voltage estimation of a PWM VSI and its application to vector-controlled induction machine parameter estimation, IEEE IND E, 47(5), 2000, pp. 1181-1185
For high-performance vector control of an induction machine, rotor resistan
ce estimation is required. The commonly used state-space class of estimator
s requires voltage transducers as instantaneous phase voltages are used in
the estimation algorithm. A phase voltage estimator is developed for a puls
ewidth modulation voltage-source inverter. The voltage estimates are used i
n a rotor resistance estimator and practical results show that the usual ph
ase-voltage transducers are unnecessary.