Kyo-Beum Lee, "Sensorless Control for Induction Motor Drives Fed By a Matrix Converter Using Power Theory," The Transactions of the Korean Institute of Electrical Engineers, vol. 56, no. 3, pp. 524–530, Mar. 2007. > 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 power control scheme. The proposed compensation

method is applied for high performance motor drives using a 3 kW matrix converter system. Experimental results are shown to

illustrate the feasibility of the proposed strategy.