Sensorless V-type vector-controlled IM drive with inherent flux-weakening capability

The paper deals with a voltage-fed (V-type) vector-controlled induction motor drive without speed or position sensors. At first, the drive algorithm is briefly described. Details are then given about the capability of the proposed drive to operate in the flux-weakening region with full inverter output voltage. The parameter sensitivity is also discussed and experimental results are given to validate the proposed control scheme.