一種改善的UPWM在變頻逆變器中的應用

摘要：　　本文將一種改善的UPWM調制技術應用于逆變器。通過調節調制波的頻率來實現輸出電壓的頻率可調,同時通過調節前級基準電壓來實現輸出電壓的可調。本文分析了方案的基本原理和性能。研制的工作頻率100kHz，輸出15Hz-1000Hz、150VAC-300VAC、1350VA的逆變器證明方案的可行性。 敘詞：正弦脈寬調制 逆變器 Abstract：　　This paper applies an improved UPWM to inverter. Through varying the frequency of the standard　waveform to vary frequency of the out waveform, varying magnitude of　the standard　waveform of the front supply to vary magnitude of the out waveform. This paper analyzes operation and function of the scheme. In addition, the　experimental result of the developed inverter which is rated at 1350VA and the output varies from 15Hz to 1000Hz,150VAC to 300VAC and run at a switching frequency of 100kHz are presented. Keyword：spwm, inverter