Research of fast SVPWM algorithm and its overmodulation method
DOI：10.7667/PSPC180127
Key Words:SVPWM  fast algorithm  three-section vector space  over-modulation
Author NameAffiliationE-mail
WANG Guang Ministry of Education Engineering Research Center of Automotive Electronics Drive Control and System Integration, Harbin University of Science and Technology, Harbin 150080, China  
WANG Xudong Ministry of Education Engineering Research Center of Automotive Electronics Drive Control and System Integration, Harbin University of Science and Technology, Harbin 150080, China  
MA Junjie Ministry of Education Engineering Research Center of Automotive Electronics Drive Control and System Integration, Harbin University of Science and Technology, Harbin 150080, China m92275@126.com 
BAI Yali Ministry of Education Engineering Research Center of Automotive Electronics Drive Control and System Integration, Harbin University of Science and Technology, Harbin 150080, China  
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Abstract:To solve the problems of complex structure and large computation of the traditional algorithm, a fast SVPWM algorithm based on three-section vector space is put forward. Without coordinate transformation, it uses the arithmetic in stead of complicated trigonometric operation, so it can reduce the number of logic judgment and get more accurate modulation. As a result, the algorithm structure of SVPWM is greatly simplified and the operation time is reduced. Besides, to improve the utilization ratio of DC bus voltage further, an over-modulation method based on piecewise nonlinear fitting is analyzed and raised, which can avoid the complex calculation of the holding angle and the control angle as well as the error of the modulation caused by look-up table method is also reduced. The results of simulation and experiment indicate that the fast SVPWM algorithm and its over-modulation method are effective and superior. This work is supported by Major Science and Technology Project of Guangdong Province (No. 2015B010118003) and Science and Technology Plan of Shandong Institutions of Higher Education (No. J17KB136).
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