Kyo-Beum Lee and Frede Blaabjerg, "Sensorless Scheme for Induction Motor Drives Fed by a Matrix Converter Using Power Theory," in Proc. PESC Conf., Jun. 2006, pp. 1–7. > Paper

This paper presents a new and simple method for sensorless operation of matrix converter drives using a constant air-gap flux and the

imaginary power flowing to the motor. To improve low-speed sensorless performance, the non-linearities of a matrix converter drive

such as commutation delays, turn-on and turn-off times of switching devices, and on-state switching device voltage drop are modelled

using PQR transformation and compensated using a reference current control scheme. The proposed compensation method is applied

for high performance induction motor drives using a 3 kW matrix converter system. Experimental results are shown to illustrate the

feasibility of the proposed strategy.