Control of Transformerless Uninterrupted Power Supply for Unity Power Factor and Sinusoidal Inductor Currents
نویسنده
چکیده
This paper discusses the design of controller for transformerless uninterruptible power supply (UPS), with simultaneous ac and dc loading. The objective of the design is to maintain good regulation of the ac and dc voltages and sinusoidal inductor currents simultaneously. The volt-second balance across the output filter inductor is used to maintain the current in sinusoidal form which is the unique contribution of this paper. Complete analytical design solution is provided for both rectifier and inverter simultaneously. Implementation of the controller requires simple analog circuits. The proposed solution is validated through simulation and experimentation.
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