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In this paper, a direct power control (DPC) technique is proposed for matrix converter-fed grid-connected doubly fed induction generators (DFIGs). In contrast to what has been investigated in the past for direct torque control (DTC) or DPC of matrix converter-fed DFIGs, the active and reactive powers are regulated in a fixed switching frequency using indirect space vector modulation (ISVM) technique. Hence, designing input filters for matrix converters (MCs) becomes convenient. In addition, the reactive component of input side of MC is controlled which leads to reduction of distortion in grid current waveform. Also, an extensive discussion is addressed for nonlinear voltage errors of MC that may cause inaccurate power control. Simulation results done in MATLAB/Simulink show the effectiveness of the proposed method.
Arzhang Yousefi-Talouki; Shaghayegh Zalzar; Edris Pouresmaeil. Direct Power Control of Matrix Converter-Fed DFIG with Fixed Switching Frequency. Sustainability 2019, 11, 2604 .
AMA StyleArzhang Yousefi-Talouki, Shaghayegh Zalzar, Edris Pouresmaeil. Direct Power Control of Matrix Converter-Fed DFIG with Fixed Switching Frequency. Sustainability. 2019; 11 (9):2604.
Chicago/Turabian StyleArzhang Yousefi-Talouki; Shaghayegh Zalzar; Edris Pouresmaeil. 2019. "Direct Power Control of Matrix Converter-Fed DFIG with Fixed Switching Frequency." Sustainability 11, no. 9: 2604.
The compensation of converters’ nonlinear voltage error is crucial in encoder-less control of ac motor drives. In this paper, a new self-commissioning and compensation method is proposed for matrix converters (MC). Similar to what done in the past for voltage source inverters, the MC voltage error is identified before the drive start and stored in a look-up table (LUT), later used for error compensation and accurate voltage estimate. Different from what observed in the past, the effect of parasitic capacitors on nonlinear voltage error of MCs in four-step current based commutation is observed and studied. Eventually, this method is applied to the sensorless control of a synchronous reluctance (SyR) motor drive, using the direct flux vector control (DFVC) concept. Experimental results are presented to validate the effectiveness of proposed self-commissioning in improving the performance of sensorless control at standstill and low speed.
Fausto Stella; Arzhang Yousefi-Talouki; Shafiq Odhano; Gianmario Pellegrino; Pericle Zanchetta. An Accurate Self-Commissioning Technique for Matrix Converters Applied to Sensorless Control of Synchronous Reluctance Motor Drives. IEEE Journal of Emerging and Selected Topics in Power Electronics 2018, 7, 1342 -1351.
AMA StyleFausto Stella, Arzhang Yousefi-Talouki, Shafiq Odhano, Gianmario Pellegrino, Pericle Zanchetta. An Accurate Self-Commissioning Technique for Matrix Converters Applied to Sensorless Control of Synchronous Reluctance Motor Drives. IEEE Journal of Emerging and Selected Topics in Power Electronics. 2018; 7 (2):1342-1351.
Chicago/Turabian StyleFausto Stella; Arzhang Yousefi-Talouki; Shafiq Odhano; Gianmario Pellegrino; Pericle Zanchetta. 2018. "An Accurate Self-Commissioning Technique for Matrix Converters Applied to Sensorless Control of Synchronous Reluctance Motor Drives." IEEE Journal of Emerging and Selected Topics in Power Electronics 7, no. 2: 1342-1351.
This paper proposes a sensorless control scheme for synchronous reluctance (SyR) motor drives based on the direct-flux vector control (DFVC) method. The control operates in stator-flux-oriented coordinates, using constant switching frequency. A hybrid position and speed observer is proposed, based on the combination of the active flux concept and high-frequency signal injection and demodulation. The two methods are fused together to form a unique position and speed estimate signals, with seamless transition between the two models based on reference speed. The proposed observer covers a wide speed range, from standstill operation at full load to flux weakening (FW). Furthermore, it is inherently immune from position estimation error caused by cross saturation, as proven mathematically and experimentally. The motor is operated according to the maximum torque per ampere (MTPA) law. Specific issues related to MTPA around zero torque are addressed in this paper. The proposed control technique extends the range of application of the DFVC to encoderless drives, and can be usefully adopted in those applications where both zero-speed and FW speed range operations are necessary, such as home appliances, or automotive and aerospace actuators and generators. A 2.2-kW SyR motor prototype was tested to verify the feasibility of the proposed method. Key tuning aspects are addressed in this paper.
Arzhang Yousefi-Talouki; Paolo Pescetto; Gian-Mario Luigi Pellegrino; Ion Boldea. Combined Active Flux and High-Frequency Injection Methods for Sensorless Direct-Flux Vector Control of Synchronous Reluctance Machines. IEEE Transactions on Power Electronics 2017, 33, 2447 -2457.
AMA StyleArzhang Yousefi-Talouki, Paolo Pescetto, Gian-Mario Luigi Pellegrino, Ion Boldea. Combined Active Flux and High-Frequency Injection Methods for Sensorless Direct-Flux Vector Control of Synchronous Reluctance Machines. IEEE Transactions on Power Electronics. 2017; 33 (3):2447-2457.
Chicago/Turabian StyleArzhang Yousefi-Talouki; Paolo Pescetto; Gian-Mario Luigi Pellegrino; Ion Boldea. 2017. "Combined Active Flux and High-Frequency Injection Methods for Sensorless Direct-Flux Vector Control of Synchronous Reluctance Machines." IEEE Transactions on Power Electronics 33, no. 3: 2447-2457.