Evaluation of single-phase rectifier bridge clamping circuit solar power transformerless inverter topologies for electric vehicle applications

In recent decades, solar power transformerless inverters (SPTI) are broadly used in electric vehicle and photovoltaic applications because of its features in terms of decayed price, higher in efficiency. As per the literature, several transformerless PV inverter configurations have been proposed and published to meet the VDE-4105 standard for protection requirement of leakage currents. In this chapter, a group of rectifier bridge single-phase solar power transformerless inverters are investigated in detail. Further, a simple modified clamping topology with MOSFET technology and corresponding modulation strategy is proposed here namely MOSFET rectifier bridge clamping topology (MRBCT). The proposed topology is accomplished of reactive power support, constant common-mode-voltage and hence low leakage current in all modes of operation. And the fundamental relationship between dc-bypass (H5), ac-bypass (highly efficient and reliable inverter concept and the proposed MRBCT topology is studied thoroughly. Further, loss analysis is measured through PSIM platform to measure the effectiveness of various topologies. The theoretical findings of proposed topology are confirmed through MATLAB/Simulink platform and also through experimental results. The performance parameters in terms of CMV, common-mode current (CM-current), total-harmonic distortions (%THD), switching count, losses and efficiency is compare with recent topologies.