Abstract
The paper presents two high-performance single-phase AC chopper circuits which perform AC-AC bidirectional direct conversion;one of them contains resistive loads and the other one is for inductive loads. It includes useful equations for chopper design. The correctfunctioning is tested by simulation.DOI: http://dx.doi.org/10.5755/j01.eee.18.10.1305
Highlights
The direct AC-AC converters have applications in various fields, such as AC motor drives, electronic transformers, switching AC adjustable sources, output voltage waveform restorers, etc
In [1] and [2], the authors propose an AC chopper, with improved commutation, which leads to increased efficiency
This paper presents a simple circuit of direct AC-AC single-phase buck converter, which allows eliminating downtime in control by an adequate disposition of power switching devices
Summary
The direct AC-AC converters have applications in various fields, such as AC motor drives, electronic transformers, switching AC adjustable sources, output voltage waveform restorers, etc. In [1] and [2], the authors propose an AC chopper, with improved commutation, which leads to increased efficiency. This requires many switching devices and complex control circuits. This paper presents a simple circuit of direct AC-AC single-phase buck converter, which allows eliminating downtime in control by an adequate disposition of power switching devices. Snubber circuits are no longer necessary, the work frequency can be substantially increased (over 20 kHz), the control is simple, the power flux can be bidirectional, the functioning is adequate, irrespective of the load nature, and the efficiency is high.
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