DIRECT TORQUE CONTROL OF MATRIX CONVERTER FED PMSM

DIRECT TORQUE CONTROL OF MATRIX CONVERTER FED PMSM
Author(s):
R.Perumalsamy, A. Kayathri, M.S.Devi
Keywords:
Direct matrix converter (DMC), Permanent magnet synchronous Motor, PI Controller, Voltage source inverter(VSI), Space Vector Modulation (SVM).
Abstract
This paper proposes a direct torque control (DTC) scheme for a matrix-converter-fed PMSM drive system. DTC is a high performance motor control scheme with fast torque and flux responses. However, the main disadvantage of conventional DTC is electromagnetic torque ripple. Besides, the matrix converter is a single-stage ac-ac power conversion device without dc-link energy storage elements. Due to the properties of the matrix converter, the pseudo dc-link will provide with three different types of voltage: the high, middle, and low voltages. Therefore, based on space vector modulation generated by a matrix converter, there are three states on each space vector location. By suitably selecting switching pattern, the electromagnetic torque ripple of the motor is effectively reduced. Using this switching strategy, the advantages of the DTC schemes and the benefits of the matrix converters can be combined. As a result, a satisfactory servo drive can be achieved.
Article Details
Unique Paper ID: 143286 Publication Volume & Issue: Volume 2, Issue 9 Page(s): 45 - 51
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