Abstract
In the electric traction transmission system, subject to the maximum switching frequency and output voltage and current harmonic performance, a special optimized pulse width modulation strategy is generally required. The selected harmonic elimination PWM eliminates the lower-order harmonics so the interference of motor torque will decrease. In this paper, the basic principles of SHE-PWM (selected harmonic elimination PWM) technology are studied; meanwhile, the method of using MATLAB to calculate switching angle is introduced. Then, the limitation of SHE-PWM based on DSP and the advantage based on FPGA are analyzed. Besides, the frequency conversion speed control system based on the SHE-PWM algorithm is completed through the FPGA, and the experimental results verify the theoretical analysis of SHE-PWM.
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References
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Acknowledgment
This work was supported in part by the China National Science and Technology Support Program under Grant (2015BAG13B01 and 2013BAG24B01).
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Huang, S., Diao, L., Bai, X., Liu, Z. (2016). The Selected Harmonic Elimination PWM Strategy Based on FPGA. In: Jia, L., Liu, Z., Qin, Y., Ding, R., Diao, L. (eds) Proceedings of the 2015 International Conference on Electrical and Information Technologies for Rail Transportation. Lecture Notes in Electrical Engineering, vol 377. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-49367-0_43
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DOI: https://doi.org/10.1007/978-3-662-49367-0_43
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