A frequency-domain analytical model of a four-switch space-vector PWM inverter

摘要

The paper presents harmonic analysis of the voltage waveforms of the four-switch voltage source inverter feeding an induction motor drive. The four-switch inverter uses space-vector modulation strategy. This proposed method is based on the Laplace transform approach of the periodic waveforms, and all the calculations can be carried out into effect straightly by algebraic method with high accuracy. Using the relation between the Laplace transform of the periodic waveform and Fourier coefficients we can derive the coefficients of the Fourier series. From the analytical relations we can evaluate harmonic spectra for the different space vector modulation techniques.