B. Hopfensperger et al., Stator-flux-oriented control of a doubly-fed induction machine with and without position encoder, IEE P-EL PO, 147(4), 2000, pp. 241-250
The control of a doubly-fed induction machine (DFM) with and without the us
e of a rotor position encoder is examined. First, a stator flux linkage ori
ented control scheme for power and speed control, with a position encoder,
shows the high performance control capabilities of this control arrangement
and serves as foundation for the sensorless scheme. The power-control meth
od is then applied to a sensorless method, based on a previous control arra
ngement. This method is then extended to derive a sensorless speed-control
mechanism for the DFM, AU control schemes are implemented and performed on
an experimental test system, comprising two 80C167 microcontrollers and a 2
.25kW wound rotor induction machine.