Adaptive voltage tracking control of zeta buck-boost converters

Compensators and PI controllers have been designed and used for control of Zeta converters. However, frequent voltage variations in some applications such as maximum power point tracking of solar power require a high profile voltage tracking control. In addition, load resistance and inductor current influence the performance of conventional controllers. This paper illustrates the design and application of a model reference adaptive controller for output voltage tracking of a zeta converter. The results, compared with a PI controller, demonstrate a close tracking profile with minimal control effort and elimination of the load resistance dependencies.