A Modulation Technique to Reduce Switching Losses in Matrix Converters

Fed. Univ. of Pernambuco, Recife
IEEE Transactions on Industrial Electronics (Impact Factor: 6.5). 05/2009; DOI: 10.1109/TIE.2008.2006241
Source: IEEE Xplore

ABSTRACT This paper presents a modulation technique based on the generalized pulsewidth-modulation strategy for matrix converters. The proposed technique uses a discontinuous modulation to clamp each output leg of the converter during 120deg of the output voltage period, achieving a reduced number of switchings compared with the traditional modulation techniques. Aside from that, the major attraction of the proposed technique is an additional algorithm that lags the clamping of each output leg of the converter to synchronize it with the peak of the corresponding output current (load current), avoiding high switching losses (switching at high currents). Therefore, this technique reduces the number of switchings as well as guarantees only medium and low current switchings. Simulation and experimental results show the efficiency of the proposed technique.

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    • "Consequently, this method is preferred for theoretical analysis rather than real-time implementation. The second approach is the SVM strategy [11], [12], which is similar to that used by CSRs. This method is a well-known and well-established modulation strategy because of its high performance, relative simplicity, and inherent capability to achieve full control of both output voltage and input power factor. "
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    • "To further simplify the implementation of the SVPWM and to get a reduced number of switching and consequently reduced switching losses with improved current spectra, a few other modulation schemes were developed [37]–[41]. These schemes are the variations of the SVPWM. "
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    IEEE Transactions on Industrial Electronics 01/2011; 58. DOI:10.1109/TIE.2010.2098373 · 6.50 Impact Factor
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    • "The matrix converter (MC) is a forced commutated ac–ac converter which uses an array of controlled bidirectional switches, as the main power elements, to create a variable output voltage system. It has no dc-link circuits and needs no large energy storage elements [6]. Fig. 3 (a) shows the topology of a single-phase MC, which implies the use of four bidirectional switches, and each one can be formed by two connected IGBTs, as shows Fig. 2 (b). "
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