Study on the New SVPWM Method for Three-Level Inverter of Brushless Doubly-Fed Machine

Abstract:

Brushless doubly-fed machine (BDFM) is a new type of AC induction motor.It has a good applicable prospect as the variable frequency motors or the variable speed constant frequency generators. Although the advantage of the three-level inverter, there are also some problems of neutral point voltage balance in this method such as the unbalance of neutral point voltage. And the traditional principle of Three-level inverter space vector pulse width modulation method is to estimate the sectors and calculating a lot of trigonometric functions. To solve these problems, a novel method for the virtual space vector concept in G-H coordinate system is presented in this paper. The method proposed can omit the judging process of the sectors, reduce the calculating burden, and maintain the balance of neutral-point voltage between capacitances within a certain index modulation. The results of simulation are given to validate the improved virtual space vector modulation.

• Periodical: Advanced Materials Research (Volume 619)
• Pages: 156-159
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.619.156
• Online since: December 2012
• Authors: Yan Liu, Xu Wang, Yan Xing, Dan Yang
• Keywords: 60° Coordinate System, Brushless Doubly-Fed Machine, Three-Level, Virtual Vector

References

[1] Izaskun Sarasola, Javier Poza, Miguel A. Rodriguez, Gonzalo Abad, Direct torque control design and experimental evaluation for the brushless doubly fed machine. Energy Conversion and Management. 52 (2011) 1226–1234.

DOI: 10.1016/j.enconman.2010.09.018

[2] S.J. Fattahi, A.A. Khayyat*, Direct Torque Control of Brushless Doubly Fed Induction Machine. SPEEDAM 2010 International Symposium on Power Electronics, Electrical Drives, Automation and Motion. 1744-1747.

DOI: 10.1109/speedam.2010.5545082

[3] Yunguo Zhu, Xing Zhang, Shengyong Liu, Study on Speed Sensorless Vector Control of Brushless Doubly-Fed Machine. Consumer Electronics, Communications and Networks (CECNet), 2011 International Conference.  16-18 April 2011 780-783.

DOI: 10.1109/cecnet.2011.5768887

[4] Hamed Gorginpour, Behzad Jandaghi, and Hashem Oraee, Time and Space Harmonics in Brushless Doubly-Fed Machine. Electrical Engineering (ICEE), 2011 19th Iranian Conference. 17-19 May 2011. 1-6.

DOI: 10.1109/pedstc.2011.5742411

[5] A. S. Abdel-Khalik, M. I. Masoud, A. L. Mohamadein, B. W. Williams, M. M. Ahmed, Control of Rotor Torque and Rotor Electric Power in a Reluctance Wound Rotor Brushless Doubly Fed Machine. Power & Energy Society General Meeting, 2009. PES '09. IEEE. 26-30 July 2009, 1 – 5.

DOI: 10.1109/pes.2009.5275837

[6] SONG Wen-xiang, CHEN Guo-cheng, WU Hui, SUN Cheng-bo, A Novel SVPWM Strategy and Its Implementation Considering Neutral-point Potential Balancing for Three-level NPC Inverter. Proceedings of the CSEE. (In Chinese).

DOI: 10.1007/s11741-006-0105-7