Abstract
Matrix converters have the most compact and efficient AC-AC converter structure due to the lack of the DC intermediate components. The matrix converter makes a single-stage conversion directly connecting any terminal of voltage source to any terminal of load. This outstanding feature leads to some problems that must be overcome under the distorted input voltage conditions. A matrix converter has low immunity to power source disturbances, because it has no DC intermediate circuit. Any disturbance in the power source creates a negative effect on the load of the matrix converter and on the current drawn from the source. In this study, a novel compensation method, which provides immunity against input voltage disturbances, is suggested for the matrix converter. The suggested method has a hybrid structure, which includes both feedforward and fuzzy logic controller based feedback methods. The effectiveness and accuracy of the suggested new hybrid compensation approach are proved by the various results obtained.
Highlights
The matrix converter (MC) is an AC-AC power converter making only single-conversions
MC model was developed by using Matlab & Simulink, and, the proposed hybrid compensation system was applied to the developed model
The voltage-gain in the MC when compensated by the hybrid compensation system is variable continuously
Summary
The matrix converter (MC) is an AC-AC power converter making only single-conversions. In [5], a compensation method, which implements the load current’s control, is introduced to decrease the negative impacts of distorted source voltages in the matrix converter. In [13], three modulation methods, which have positive, negative, and combined switching patterns for single-phase matrix converters are presented. Using these methods, sinusoidal output voltages are obtained and total harmonic distortions (THD) of output and input currents are reduced. In [14], a controller based on internal model control is presented in the case of abnormal input voltages for the MC, which feeds induction motor drives controlled with vector control This method has the ability to set point tracking. Several numerical outcomes are given to evidence the correctness of the novel hybrid compensation method
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