Review of general modeling approaches of power converters

The modeling approaches of power converters occupy an important position in electronic systems and have made considerable progress over the past years. Continuous linearization techniques are reviewed, including state-space average model, generalized averaged small-signal describing function method. A Buck converter with PWM modulation voltage-mode control is taken as example to compare advantages disadvantages different methods through simulation analysis. Moreover, corresponding equivalent circuit intuitive physical meaning model given. results point out that can improve accuracy based on model. In techniques, reflects at low frequencies, but introduces phase lag high-frequency region. method derived from harmonic linearization, which takes into account sideband effect improves high frequencies.