Quadratic buck–boost converter with reduced input current ripple and wide conversion range

Abstract

This study introduces an advanced DC-DC power converter with two main objectives, (i) to achieve a wide range of voltage gain, which means the converter may work over a wide range of input voltage for a fixed desired output voltage and (ii) to achieve a reduced input current ripple. Those features are highly desired in renewable energy applications, for example with photovoltaic panels and fuel cells. The proposed converter was designed in a structure in which the input voltage is composed by the difference of two inductor currents, the currents through inductors are driven with transistors that may have different duty cycle, this allows the current ripple cancellation. In addition, the structure of the converter provides a quadratic type voltage gain, which leads to a wide range of operation voltage. The converter achieves both the wire range of voltage gain and current ripple cancellation, nonetheless, the buck-boost capability is also provided. The input current ripple reduction helps preserve the renewable energy sources since they suffer deterioration when current with considerable ripple is drawn from them. Dynamic and steady-state analysis are performed along with the components sizing. Simulation and experimental results are provided to demonstrate the principle of the proposition. 2 voltage gain of the QBC G B voltage gain of the conventional boost converter Q j transistor jth with j = 1, 2 D j diode jth with j = 1, p, n C j capacitor jth with j = 1, p, n, o L j inductor jth with j = 1, 2, o v C j instantaneous voltage of the capacitor C j i L j instantaneous current of the inductor L j

Single-Switch High Step-Up Zeta Converter Based on Coat Circuit

“…Based on some classical converters such as buck-boost, boost, and Zeta converters, some dc-dc converters with high voltage conversion ration have been proposed in [20][21][22][23][24][25][26][27][28][29][30]. The performance comparison between the proposed Zeta converter, some of these converters, and the traditional Zeta converter is presented in Table 1.…”

“…Although each type of aforementioned converters has its advantages, most of them are derived from the conventional boost converter, which makes above converters can only achieve voltage step-up, without the capability of voltage stepdown. Therefore, these converters are difficult to be applied in some applications with the requirement of a wide voltage gain for both step-up and step-down [20][21][22]. By introducing the voltage multipliers into the conventional buck-boost converter, the converter presented in [23] can obtain higher voltage gain and has the ability of voltage step-down.…”

Noncascading Quadratic Buck-Boost Converter for Photovoltaic Applications

“…The synthesis of a switching converter based on quadratic buck and basic boost topologies was introduced by Nousiainen and Suntio [ 11 , 12 ], where the converter was applied on a photovoltaic system to adapt the energy injected to an inverter. The development of switching converters has led to converters with floating loads [ 13 , 14 ], which restrict their possible applications. In addition, some topologies of circuit synthesis combine the properties of quadratic converters with basic topologies [ 4 , 10 , 11 , 15 , 16 ].…”

Design Method of Double-Boost DC/DC Converter with High Voltage Gain for Electric Vehicles

“…High voltage gain DC/DC converters fall into different classifications according to their functions and topologies [5]. According to whether there is a transformer in the topology, they can be divided into isolated DC/DC converters and non-isolated DC/DC converters [6].…”