Notch filtering-based stabilization of PFC AC-DC pre-regulators

Power factor correction converters are nonlinear power electronics circuits used as AC-DC power supplies and due to their nonlinearity they exhibit nonlinear phenomena such as sub-harmonic oscillations and chaotic regimes. These undesirable behaviors increase the total harmonic distortion and therefore can jeopardize enormously the system performances. In this paper, a notch filter based controller is added to the voltage control loop to stabilize a power factor correction AC-DC boost pre-regulator. This control technique is simple and it introduces many advantages to the most and widely used average current mode control through widening the stability domain of the system and being its experimental implementation possible by using standard devices such as OAs and passive elements.