Generalization of zad strategy: an application to a dc-dc buck converter

The Zero Average Dynamics (ZAD) strategy has been reported in the last decade as an alternative for controlling power converters. This technique has the advantage of guaranteeing fi xed frequency switching. However, the stability of the controller is highly dependent on the load value, and when the stability is lost, the fi xed frequency switching is lost too. In this paper we generalize ZAD strategy using the probabilities framework through the expectation operator. Thus, we recover classical sliding mode control classical ZAD strategy, and new control methods can be defined, which are more stable than the others previously used. For this reason, this technique is entitled Generalized Zero Average Dynamics (GZAD). We will show several simulations regarding an application to a DC-DC Buck converter within the generalized ZAD strategy, which cannot be deduced from the classical ZAD. Numerical simulations show good regulation features and a wide range of stability.

• Autores: Angulo García, Fabiola; Olivar Tost, Gerard; Osorio Londoño, Gustavo Adolfo
• Tipo de recurso: Article of journal
• Fecha de publicación: 2011
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/37743
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/37743; http://bdigital.unal.edu.co/27827/
• Palabra clave: ZAD control; GZAD control; bifurcation analysis; power electronic circuits; power converters; control of power converters.
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional