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http://dx.doi.org/10.6113/JPE.2018.18.1.81

Double Line Voltage Synthesis Strategy for Three-to-Five Phase Direct Matrix Converters  

Wang, Rutian (School of Electrical Engineering, Northeast Electric Power University)
Zhao, Yanfeng (School of Electrical Engineering, Northeast Electric Power University)
Mu, Xingjun (Fujian Yongfu Power Engineering Co., Ltd.)
Wang, Weiquan (School of Electrical Engineering, Northeast Electric Power University)
Publication Information
Journal of Power Electronics / v.18, no.1, 2018 , pp. 81-91 More about this Journal
Abstract
This paper proposes a double line voltage synthesis (DLVS) strategy for three-to-five phase direct matrix converters. In the proposed strategy, the input and expected output voltages are divided into 6 segments and 10 segments, respectively. In addition, in order to obtain the maximum voltage transfer ratio (VTR), the input line voltages and "source key" should be selected reasonably according to different combinations of input and output segments. Then, the corresponding duty ratios are calculated to determine the switch sequences in different segment combinations. The output voltages and currents are still sinusoidal and symmetrical with little lower order harmonics under unbalanced or distorted input voltages by using this strategy. In addition, the common mode voltage (CMV) can be suppressed by rearranging some of the switching states. This strategy is analyzed and studied by a simulation model established in MATLAB/Simulink and an experimental platform, which is controlled by a DSP and FPGA. Simulation and experimental results verify the feasibility and validity of the proposed DLVS strategy.
Keywords
Common mode voltage; Direct matrix converter; Double line voltage synthesis strategy; Source key; Three-to-five phase; Unbalanced or distorted input voltages;
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