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Sensorless Control for Induction Motor Drives Fed By a Matrix Converter Using Power Theory  

Lee, Kyo-Beum (전북대 공대 전기공학과)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.56, no.3, 2007 , pp. 524-530 More about this Journal
Abstract
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 induction motor drives using a 3 kW matrix converter system. Experimental results are shown to illustrate the feasibility of the proposed strategy.
Keywords
induction motor; matrix converter; sensorless operation; power theory; PQR transformation;
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