Triple, Quadruple, and Hextuple Voltage-Lift Modified Luo Converters Suitable for Renewable Applications

The Luo converters family is a popular non-isolated DC-DC converter, which has achieved a high voltage gain with the voltage lift technique. The highest voltage gain in this family belongs to quadruple voltage lift converters. This study proposes three modified topologies with triple, quadruple, and hextuple voltage lift. All these converters use one switch in the power circuit. Additionally, the drive circuit of the switch is simple. The common ground of the Load and input source is the other bold point of these converters. It is good to note that the provided voltage gain has a one-degree relation according to the duty cycle, which decreases the increased loss rate by the duty cycle rising compared with quadratic and cubic topologies. Additionally, the provided voltage gain is as high as in the high-ordered conventional Luo converters without increasing the number of inductors. The theoretical relations of the converters are discussed, and the experimental results are discussed to validate them. The experiment results are for 150 W output power, 50 V input voltage, and 300-600V output voltage. The extracted efficiency is more than 90 % in the proposed topologies.