Study on DSP-Based Three-Phase Inverter with Bidirectional Converters

• Main Authors: Cheng-AnChien, 簡正安
• Other Authors: Jia-You Lee
• Format: Others
• Language: zh-TW
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/75515658012424243721

碩士 === 國立成功大學 === 電機工程學系碩博士班 === 101 === The purpose of the thesis is to study on three-phase inverter system with bidirectional converters. The three-phase inverter consists of three independent and symmetrical bidirectional converters. Each converter is drived by signals with 120 degree phase shift. The output voltage is sinusoidal with the same dc component. The output of inverter is in differential mode and the dc component disappears while only the sinusoidal voltage left on the load. The frond-end of three-phase inverter system is realized by boost converters in parallel with current sharing control strategy. The advantage is to raise output power capability and stability. A prototype 3kW three-phase inverter system is implemented and tested with the resistive load, inductive load and capacitive load. The maximum efficiency of boost converter is 96%. The maximum efficiency of three-phase inverter is 95% and THD is less than 3%. The maximum efficiency of overall system is 92%.