Implementation of a three-level inverter based on zig-zag connected transformer using selective harmonic elimination
碩士 === 國立臺灣科技大學 === 電機工程系 === 95 === This thesis applies the zig-zag transformer and the selective harmonics elimination PWM (SHEPWM) scheme to control a three-level inverter system. The PWM is designed to a quarter symmetry wave due the transformer’s characteristics. The wave applies the Newton-Rap...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2007
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| Online Access: | http://ndltd.ncl.edu.tw/handle/689pvf |
| Summary: | 碩士 === 國立臺灣科技大學 === 電機工程系 === 95 === This thesis applies the zig-zag transformer and the selective harmonics elimination PWM (SHEPWM) scheme to control a three-level inverter system. The PWM is designed to a quarter symmetry wave due the transformer’s characteristics. The wave applies the Newton-Raphson method to solve the exact curves, and then used the least squares solutions to obtain curve fitting equations. Due to the advantage property of curve fitting, the digital signal processor is able to control the fundamental value and change systematic frequency. Finally, experimental results confirm the system.
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