The Swiss Rectifier exploits double-loop control to regulate output voltage and inductor current. To simplify and speed up the control design, proportional-integral regulators are commonly used, but they do not achieve optimal regulation, especially under dynamic conditions or when the converter plant is affected by delays and uncertainties. We propose an optimal control design based on the Internal Model Control (IMC) theory, able to reduce the impact of plant inaccuracies and fulfill static and dynamic specifications. The plant model is accurately obtained through PLECS simulations, including system delays, and it is used to design the controllers. The simulations show the superiority of the proposed control, that was also implemented on a microcontroller and tested on an 5-kW PFC converter prototype.
Optimal IMC-Based Control Design of a 3-Phase Buck Power Factor Correction Converter
Palazzo, Simone;Busatto, Giovanni;De Santis, Enzo;Sanseverino, Annunziata;Velardi, Francesco
2025-01-01
Abstract
The Swiss Rectifier exploits double-loop control to regulate output voltage and inductor current. To simplify and speed up the control design, proportional-integral regulators are commonly used, but they do not achieve optimal regulation, especially under dynamic conditions or when the converter plant is affected by delays and uncertainties. We propose an optimal control design based on the Internal Model Control (IMC) theory, able to reduce the impact of plant inaccuracies and fulfill static and dynamic specifications. The plant model is accurately obtained through PLECS simulations, including system delays, and it is used to design the controllers. The simulations show the superiority of the proposed control, that was also implemented on a microcontroller and tested on an 5-kW PFC converter prototype.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
