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3 PHASE DC RESONANT LINK CVCF INVERTER WITH IMPROVED SYNTHESIZED AC VOLTAGE FOR UPS EQUIPMENT
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| Author(s) |
A. Chibani; M. Nakaoka |
| Abstract |
This paper describes a digital control system for 3 phase constant voltage constant frequency (CVCF) inverter with high frequency DC resonant link. The control scheme uses the space vector method in order to generate switching patterns for power MOSFETs devices. The HF DC resonant link is used here in order to reduce the output filter size and provide soft switching strategy for power devices. A unique feature of the presented power conversion system is the slightly higher switching frequency (40 kHz or more) which can be adjusted by modifying the DC link resonant frequency and the proposed Pulse Division Strategy (PDS). The control scheme including a repetitive controller based on the output filter model is introduced. The controller provides a waveform improvement of the synthesized alternating voltage. The proposed 3 phase inverter is of particular interest for the realization of conventional UPS system (10-50 kW power range) and also HF link configuration UPS rated in the 5-10 kW power range. Analysis, implementation and simulation results are given. |
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| Filename: | Unnamed file |
| Filesize: | 3.128 MB |
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| Type |
Members Only |
| Date |
Last modified 2019-08-06 by System |
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