Conference Paper

A New Scheme to Direct Torque Control of Interior Permanent Magnet Synchronous Machine Drives for Constant Inverter Switching Frequency and Low Torque Ripple

Sch. of Electr. Eng. & Telecommun., New South Wales Univ., Sydney, NSW
DOI: 10.1109/IPEMC.2006.4778323 Conference: Power Electronics and Motion Control Conference, 2006. IPEMC 2006. CES/IEEE 5th International, Volume: 3
Source: IEEE Xplore


This paper presents a new direct torque control (DTC) scheme based on space vector modulation (SVM) for interior permanent magnet synchronous machine (IPMSM) drives. The new scheme provides a variable option for the improvement of DTC controlled IPMSM. Closed-loop control of both torque and flux is developed with two proportional-integral (PI) controllers. The stator voltage is generator through SVM unit. The torque and flux ripples are greatly reduced with fixed inverter switching frequency comparing with classical switching-table based DTC scheme. The analysis of the control principle provides a guide to design the controller parameters. Modeling results confirm the effectiveness of the proposed scheme

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    • "In order to get an excellent performance, many modifications of the basic switching table, hysteresis comparator and flux estimator of the conventional DTC (similar techniques those used in induction machine) have been proposed during last decade, as listed as follows: 1. Using new switching table -Subdividing voltage vector [13] [14] [15] -Variety of structure switching table [13] [16] [17] -PWM (Pulse Width Modulation) [18] -SVM (Space Vector Modulation) [19] [20] [21] 2. Modification of structure of inverter: -Three level inverter [22] -Matrix converter [21] [23] [24] 3. Modification of hysteresis controller -Direct Reactive Energy and Torque (DRET) control method [25] -Reference Flux Vector Calculator (RFVC) [17] -Variable Structure Control (VSC) [26] [27] Due to some modification of the DTC techniques for PMSM above, the verification of the proposed methods had been simulated using Tole Sutikno, et al. MATLAB/Simulink. "
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