This paper presents a high step-down tranformerless single-stage single-switch ac/dc converter suitable for universal line applications (90–270 Vrms ). The topology integrates a buck-type power-factor correction (PFC) cell with a buck–boost dc/dc cell and part of the input power is coupled to the output directly after the first power processing. With this direct power transfer feature and shari...

This paper presents transformerless multilevel converters as an application for high-power hybrid electric vehicle (HEV) motor drives. Multilevel converters: 1) can generate near-sinusoidal voltages with only fundamental frequency switching; 2) have almost no electromagnetic interference or common-mode voltage; and 3) make an HEV more accessible/safer and open wiring possible for most of an HEV...

This paper presents a modified z-source inverter which is an effective method for reduction of leakage current in three phase transformer less grid connected PV systems. Another modulation technique along with z-source used are space vector pulse width modulation technique which improves the accuracy of leakage current by maintaining common mode voltage (CMV) constant. The new topology only req...