Kyo-Beum Lee, Frede Blaabjerg, and Tae-Woong Yoon, “Speed-Sensorless DTC-SVM for Matrix Converter Drives With Simple Nonlinearity Compensation,” IEEE Transactions on Industry Applications, vol. 43, no. 6, pp. 1639–1649, Nov./Dec. 2007. -SCI > Paper

This paper presents a new method to improve the sensorless performance of matrix converter drives using a parameter estimation

scheme. To improve low-speed sensorless performance, the nonlinearities 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 is modeled using p-q-r

transformation and compensated using a reference current control scheme. To eliminate the input current distortion due to the

input voltage unbalance, a simple method using p-q-r transformation is also presented. The proposed compensation method is

applied for high performance induction motor drives using a 3-kW matrix converter system without a speed sensor. Experimental

results are shown to illustrate the feasibility of the proposed strategy.