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COST-EFFECTIVE PRACTICAL DEVELOPMENTS OF HIGH-PERFORMANCE 1kVA UPS WITH NEW SYSTEM CONFIGURATIONS AND THEIR SPECIFIC CONTROL IMPLEMENTATIONS
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| Author(s) |
K. Hirachi; H. Yamamoto; T. Matsui; S. Watanabe; M. Nakaoka |
| Abstract |
The state-of-the art UPS which is composed of power conversion and inversion conditioning and processing configuration incorporating simple half-bridge active AC/DC converter and half-bridge PWM inverter circuits with no electrical isolation power stage has attracted special interest recently in
computer and telecommunication systems. This UPS topology is highly cost-effective and suitable for its
power conversion efficiency improvement and volumetric size and weight reduction. However, this
attractive UPS topology has significant disadvantage that storage batteries have to be connected to the high DC link bus. In order to provide an acceptable DC voltage link with storage batteries, an improved type of application-specific UPS topology have been proposed and investigated from a practical point of
view.
This paper presents a non-electrical isolated prototype of UPS circuit topologies incorporating converter circuits for battery bank interface and their related specific control strategies. The operating principles of power conversion topologies and control strategies are described. The experimental results of a unique and high-peIformance UPS topology with battery bank interface circuit are illustrated for 1kVA UPS application and discussed as compared with the latest conventional UPS with storage batteries
connected to the high DC voltage bus. |
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| Filename: | Unnamed file |
| Filesize: | 470.3 KB |
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| Type |
Members Only |
| Date |
Last modified 2018-04-09 by System |
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