Magnetized Dickson Charge Pump Inverters

A class of high step-up single-stage inverters based on magnetically coupled inductors and a Dickson charge pump (CP) technique is presented. Firstly, the magnetized Dickson charge pump inverter (MDCPI) is presented, producing a higher voltage gain with fewer components than its counterparts. Unlike conventional magnetically coupled impedance source networks, the suggested structure provides a substantial voltage boost at a meager shoot-through duty ratio range of 0 to 10%. Thus, it offers a high step-up ability with high modulation index and smaller number of winding turns. Hence, the proposed inverter can be an excellent choice for applications with space constraints where the high output voltage, high power quality, and fewer components are the main issues. However, in addition to drawing discontinuous input current from the dc source, the topology requires tight magnetic coupling to reduce the effect of the leakage inductance. In order to address the aforementioned drawbacks, an improved MDCPI (IMDCPI) is proposed. Although the IMDCPI employs more passive components, it delivers a higher output voltage with reduced dc-link voltage spikes across the inverter bridge. Compared with the existing voltage multipliers such as Dickson, Cockcroft–Walton, and Greinacher, the proposed structures do not require extension by adding extra stages and chains to obtain demanded high voltage. Additionally, the presented topologies solve the conventional voltage multipliers' drawbacks, including output voltage drop and significant voltage stress across the CP cells' capacitors. Input current ripple and flux density of the coupled transformer in IMDCPI is compared with its counterparts to demonstrate its improved features. Detailled experimental results are provided which verify the proposed inverters' performance.