Complementary adaptive control of Zeta converters

Compensators and Proportional-Integral (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 controller. In addition, load resistance and circuit parameter variations such as inductance, capacitance and their internal resistance influence the performance of conventional controllers. This paper illustrates the design and application of a complementary model reference adaptive controller for output voltage tracking control of zeta converters. The complementary controller structure will reduce the adaptive controller´s control effort to 2%-9% variation. The results demonstrate a close tracking profile with minimal control effort and elimination of the load resistance dependencies. Experimental results are provided to demonstrate the high performance of output voltage tracking profile.