Three-Phase to Single-Phase Matrix Converters: Fresh Topology Depending on New Control Method Dissertation

Summary:

In this newspaper, a new topology is recommended for three-phase to single-phase matrix conversion programs, where more voltage levels are produced in the output in comparison with the traditional topologies. In addition , a new control method depending on minimum mistake between the generated and the desired output concentration is recommended for three-phase to single-phase matrix conversion. In the proposed control method, the output volts is produced by the mixture of different bits of the input voltages. Quite simply, by applying this process, the matrix converter runs like a mlm converter lacking to any extra elements. Because of the proposed control method, the desired output ac electricity can be made with a satisfactory accuracy even with unbalanced and significantly distorted input ac electricity waveforms. The other benefit of the recommended control method is reduction of number of turning which allows low speed semiconductors application inside the structure of bidirectional changes required by matrix converters and also decrease in

moving over losses. Employing this strategy, the

dv / dt

strains on insert are drastically reduced. Consequently, the

electromagnetic interference (EMI) is considerably lowered in comparison with the other typical control strategies. Simulation brings about PSCAD/EMTDC software and experimental results demonstrate that the proposed control approach operates correctly and what is perfect efficiency of the suggested topology.

Matrix converters will be direct ac/ac converters which in turn convert suggestions line voltages into variable voltage with unrestricted frequency without using virtually any intermediate dc link signal [1]. In recent years, the matrix conversion have received extensive attention because they may turn into a good substitute for voltage supply inverter heartbeat width modulation (PWM) topology. This is because of the fact that the matrix converter provides bidirectional electricity flow and nearly sinusoidal input/output waveforms. Furthermore, the matrix convsersion app allows a tight design because of the elimination of dc link capacitors. However, the intricacy of the matrix converter topology makes the research and the perseverance of appropriate modulation strategies a difficult activity [2]. Several alternatives based on distinct mathematical approaches have been offered in the past. All of them shows different features in terms of the quantity of switches changement in a routine period and full using the input voltages. Alesina and Venturini proposed the guidelines of matrix converter control in 81 (AV method) [3]. In the unique theory, the output/input volt quality transfer proportion was limited to 0. 5, but it was shown afterwards that, by way of third harmonic injection methods (optimum UTAV method), the utmost output/input volts transfer proportion could be increased up to 0. 866, a value which symbolizes an intrinsic limitation from the three-phase matrix converters with balanced supply voltages [4]. The scalar control modulation protocol presented in [5], although depending on a different procedure, leads to performance similar to that obtained using the optimum UTAV method. A smart increase of the maximum volt quality transfer percentage up to 1 . 053 can be described as feature of the fictitious dc link criteria, presented in [6]. This

approach considers the modulation as being a two-step process, namely, changement and inversion. The higher voltage transfer ratio is obtained in spite of low frequency bias in the output and input variables [2]. The space-vector modulation approach was initially presented in [7] to regulate only the result voltages. This approach has been successively developed in [2] and [8] in order to exploit the potential of matrix converters in controlling input electrical power factor regardless of output power factor, to totally utilize the insight voltages and also to reduce the number of switch

commutations in each cycle period.

The above...

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