Development of Single-phase Current Source Inverter for Ozonizer Power Supplies
| Autor: | Wei-Zhong Chen, 陳偉中 |
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| Rok vydání: | 2019 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 107 This thesis aims to develop a high-voltage and high-frequency single-phase current source inverter power supply for ozonizer. The whole system is composed of an interleaved buck converter, a single-phase current source inverter and a RLC parallel resonant load. Interleaved buck converter as DC-DC converter uses a three-phase bridge rectifier to convert grid voltage to dc-link voltage. With controlling the output current of the interleaved buck converter, the features of constant output power and constant output current can be achieved. This control strategy could reduce the value of ripple of the output current and increase the system power capacity. Single-phase current source inverter converts direct current to alternating current, and connects with a transformer as a power supply for ozonizer. This RLC parallel resonant circuit can supply a high power factor and low switching loss output by working at the resonant frequency with the single-phase current source inverter. The 32-bit digital signal processor, TMS320F28069, is adopted as the system core. All control strategies are accomplished with C language, which can reduce hardware components. The ouput power of the system as power supply for ozonizer reaches to 1.0kW, the ouput current of the primary side of the transformer is 5.35A, the ouput voltage is 431V, and the weight percent of the ozone is 11.15%. The thesis also accomplished a system with a parallel resonant circuit to simulate ozonizer, which output power reaches to 2.0W. The output current is 7.84A, the output voltage is 263V, the output frequency is 1kHz, the output power factor is 0.99, and the system efficiency is 91%. The feasibility of the proposed system structure and control strategy is verified experimentally. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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