Integrated Quadratic Boost Zeta Converter

In theory conventional boost converters can have voltage gain infinite when duty cycle approximate to one. But it has certain disadvantages when used in high step up applications. A novel high step-up DC/DC converter named Integrated Quadratic-Boost-Zeta converter (QBZ) is based on the combination of two well-known DC/DC converter circuits, the Isolated Zeta converter and the Quadratic-Boost converter. The output voltage boosting is obtained by summing both output voltages of the Zeta and the Quadratic Boost. Topology has a single-switch, maintaining a low component count. The circuit can ensure a low output current ripple due to the Zeta output inductor. The converter is made to provide a regulated output voltage for a range of input as the solar input depends on environmental conditions. The Integrated Quadratic-Boost-Zeta Converter is analyzed, and its feasibility and reliability are confirmed by experimental results obtained from laboratory prototype for 5 KHz, 1.6W output power.