Spectral Calculation of the Output Voltage of an Inverter with Bipolar Pulse Width Modulation  

作　　者：Mreela V. Sunde Z. Beneie 

机构地区：[1]Faculty of Electrical Engineering and Computing, University of Zagreb, Zagreb HR-10000, Croatia

出　　处：《Journal of Energy and Power Engineering》2010年第8期48-56,共9页能源与动力工程（美国大卫英文）

摘　　要：Converters with pulse width modulation are used for connections between the direct current （DC） and alternating current （AC） networks, e.g., in uninterrupted power supply systems, AC electromotor drives, for powering induction furnaces, in audio technique. Spectrum of signals sampled by pulse amplitude modulation and output voltage spectrum of the converter with pulse width modulation have similar properties. Spectrum of signals sampled by pulse amplitude modulation contains a harmonic of frequency equal to the frequency of the modulating signal and the harmonics of frequencies equal to the sum of frequency of the modulating signal and multiples of the sampling frequency. The output voltage spectrum of the converter with bipolar pulse width modulation contains harmonic of frequency equal to the frequency of the modulating signal and harmonics of frequencies equal to sum of the frequency of the modulating signal and multiples of the frequency of the carrier signal. It also contains harmonics of frequencies equal to the sum of the multiples of the frequency of the modulating signal and the multiples of the carrier signal. The comparison analysis was carried out for the harmonics of the output voltage of the converter with bipolar pulse width modulation in time domain. The dependency of the amplitudes and frequency spectrum on the wave forms of the carrier signal and modulating signal was shown. Similarity of the output voltage spectrum of the converter and signal spectrum sampled by the pulse width modulation was also shown. Key words： Output voltage converter with bipolar pulse width modulation, spectral analysis, Fourier series, carrier signal, reference signal.

关 键 词：Output voltage converter with bipolar pulse width modulation spectral analysis Fourier series carrier signal referencesignal. 

分 类 号：TN787.2[电子电信—电路与系统] TM44[电气工程—电器]