Kyo-Beum Lee and Frede Blaabjerg, “Sensorless DTC-SVM for Induction Motor Driven by a Matrix Converter Using a Parameter Estimation Strategy,” IEEE Transactions on Industrial Electronics, vol. 55, no. 2, pp. 512–521, Feb. 2008. -SCI > Paper

This paper presents a new direct torque controlled space vector modulated method to improve the sensorless performance of

matrix converter drives using a parameter estimation scheme. The flux and torque error are geometrically combined in a new flux

leakage vector to make a stator command voltage vector in a deadbeat manner. A new sensorless method of estimating the rotor

speed, flux, stator resistance, and rotor resistance is derived and verified with experimental results. Common terms in the error

dynamics are utilized to find a simpler error model involving some auxiliary variables. Using this error model, the state estimation

problem is converted into a parameter estimation problem assuming the rotor speed is constant. The proposed adaptive schemes

are determined so that the whole system is stable in the sense of Lyapunov. The effectiveness of the proposed algorithm is verified

by experiments.