A low distortion inverter without low-frequency magnetics for UPS application

The increasing usage of digital data processing equipment has increased the demand for small capacity, compact, low-cost and energy-efficient UPS systems as a reliable power source. UPS systems utilise a power conversion stage from the battery backup to an output AC voltage compatible with the comme...

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Bibliographic Details
Published inProceedings of 1995 International Conference on Power Electronics and Drive Systems. PEDS 95 pp. 347 - 352 vol.1
Main Authors Biswas, S.K., Biswarup Basak, Basu, T.K.
Format Conference Proceeding
LanguageEnglish
Published IEEE 1995
Subjects
Batteries
Data processing
Energy efficiency
Filters
Frequency conversion
Inverters
Magnetic separation
Power conversion
Power system reliability
Uninterruptible power systems
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Summary:The increasing usage of digital data processing equipment has increased the demand for small capacity, compact, low-cost and energy-efficient UPS systems as a reliable power source. UPS systems utilise a power conversion stage from the battery backup to an output AC voltage compatible with the commercial supply, conventionally using a power frequency isolated step-up transformer. Recently, high frequency power conversion techniques have been used to replace the low frequency transformer by a high frequency power stage and transformer design reducing the size and weight of the overall equipment significantly. This paper presents an alternative approach to a compact inverter for UPS application by synthesizing a low distortion stepped waveform from a high voltage DC bus, without the need for output transformer or filter. A high frequency DC to DC power converter is used to generate the high voltage DC bus from the low voltage battery using a lightweight high frequency transformer. Thus, no low frequency magnetics are necessary.< >
ISBN:0780324234
9780780324237
DOI:10.1109/PEDS.1995.404897