Abstract
Uninterruptible power supplies (UPS) are needed to provide a source of electrical energy with high quality, stability and disposability in case the public mains cannot fulfil these demands. The technical requirements of low power UPS systems are, above all, a high power density, small size and weight, low noise level and a stable and harmonic free output voltage. This paper presents a concept of a transformerless single-phase inverter for a battery-supplied static online UPS, which is especially designed to generate two output voltages with different frequencies. The presented inverter topology has the same efficiency and device stresses, irrespective of the chosen output voltage at the same output power. A design procedure of a predictive digital state feedback control scheme to ensure a sufficient quality of output voltage under typical linear and nonlinear load conditions is shown. Additional necessary functions like overload and short circuit protection are implemented in the control strategy. Finally some simulation results of the proposed concept using SIMPLORER(R) are given.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
