Preface
The output voltage of a power inverter is a pure sinusoidal waveform with minimum distortion. However, for practical inverters, the output voltage is a series of rectangular waveforms. The major issue for the control of the power inverters is obtaining suitable modulation methods to control the output rectangular waveforms in order to synthesize the desired waveforms. Therefore, a modulation control method is required to get a desired fundamental frequency voltage and to eliminate higher-order harmonics as much as possible.
Higher frequencies are employed in traditional pulse width modulation (PWM) methods because the undesirable harmonics present at higher frequencies, which can be filtered easily and several kilohertz, is well above ...
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