3/10/2024 0 Comments Pulse width modulationFor sinusoidal PWM, the modulating index m is given by A m/A c. The sinusoidal amplitude is given as A m and that of the carrier triangle is give as A c. Regardless of whether the voltage of the signal is smaller or larger than that of the carrier waveform, the resulting output voltage of the DC bus is either negative or positive. The sinusoidal PWM waveform is obtained by comparing the desired modulated waveform with a triangular waveform of high frequency. However, if the switch is turned on for a number of times, a harmonic profile that is improved waveform is obtained. During each cycle, the switch is turned on or off once. In a simple source voltage inverter, the switches can be turned ON and OFF as needed. Therefore, waveform average value is given by The time period for modulation is given by T. It uses a pulse wave in rectangular/square form that results in a variable average waveform value f(t), after its pulse width has been modulated. PWM is a technique that is used to reduce the overall harmonic distortion (THD) in a load current.
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