WSEAS Transactions on Systems and Control
Print ISSN: 1991-8763, E-ISSN: 2224-2856
Volume 9, 2014
A Novel SVPWM Modulation Algorithm of Voltage Source Rectifier with Minimized Switching Losses
Authors: , , , ,
Abstract: Since PWM voltage source rectifier (VSR) can not only provide high-quality DC voltage but also realize four-quadrant operation, it is widely used in many applications. In order to improve the overall efficiency of rectifier, it is required to reduce its switching count and switching loss. Given that the switching loss of rectifier is closely related with its modulation algorithms, the existing modulation algorithms should be optimized. At first, what presented in the paper is the theoretical derivation of the multi-solution principle of VSR, as well as the theoretical analysis of the essential relationship between SPWM and SVPWM. Then the minimized switching loss SPWM and SVPWM modulation algorithms injecting zero-sequence component into the objective function of rectifier are presented, and a power loss formula of power device is also provided. The rectifier with minimized switching loss SPWM and SVPWM modulation algorithms is simulated by means of MATLAB/SIMULINK. Then the experimental platform of VSR with minimized switching loss PWM modulation algorithm is realized based on DSP F28335, which has verified the above theoretical analysis and simulation results. The results show that the overall efficiency of the rectifier with minimized switching loss PWM modulation algorithm increases about 2~3% compared to traditional SPWM and SVPWM modulation algorithms.
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Keywords: Voltage source rectifier, Multi-solution, Objective function, Zero-sequence component, Minimized switching loss PWM
Pages: 108-119
WSEAS Transactions on Systems and Control, ISSN / E-ISSN: 1991-8763 / 2224-2856, Volume 9, 2014, Art. #12