A High Efficiency Non-Isolated Buck-Boost Converter Based on ZETA Converter

ABSTRACT:

  In this paper, a new transformerless buck-boost converter based on ZETA converter is introduced. The proposed converter has the ZETA converter advantages such as, buck-boost capability, input to output DC insulation and continuous output current. The suggested converter voltage gain is higher than the classic ZETA converter. In the presented converter, only one main switch is utilized. The proposed converter offers low voltage stress of the switch; therefore, the low on-state resistance of the main switch can be selected to decrease losses of the switch. The presented converter topology is simple; hence, the control of the converter is simple. The converter has the continuous output current. The mathematical analyses of the presented converter are given. The experimental results confirm the correctness of the analysis.

KEYWORDS:

1.      Transformerless buck-boost converter

2.      Voltage gain

3.      Main switch

4.      Voltage stress

SOFTWARE: MATLAB/SIMULINK

 CONCLUSION:

In this paper, a novel transformerless buck boost converter based on ZETA converter is presented. In this converter, only one main switch is used, which decreases the losses and improves efficiency. The active switch voltage stress is low and switch with low on-state resistance can be utilized. The voltage gain of the converter is higher than that of the classic boost, buck-boost, ZETA, CUK and SEPIC converters. The presented converter structure is simple; hence, the converter control is simple. The buck-boost converters are used in some applications such as fuel-cell, car electronic devices, and LED drivers. Finally, the experimental results are given to verify the proposed converter.

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