Improved High Step-Up Cockcroft-Walton Magnetic Coupling Inverter

Soroush Esmaeili, Ashraf Ali Khan, Mohsin Jamil, Usman Ali Khan, Hafiz Furqan Ahmed, Shehab Ahmed

Research output: Contribution to journalArticlepeer-review

Abstract

An improved dual winding magnetically coupled-inductors inverter based on a Cockcroft-Walton multiplier voltage cell is proposed in this paper. Compared with the conventional generalized Cockcroft-Walton multiplier voltage Z-source inverters, the proposed inverter attains higher voltage gain by decreasing the transformer’s turns number. As a result, lower cost, higher efficiency, larger voltage boost factor, and higher density can be realized in the proposed inverter. Furthermore, unlike conventional magnetically coupled impedance source inverters, the proposed topology offers a larger voltage boost factor for small shoot-through duty ratios with a smoother slope, which enhances the practical controllability of the inverter. Hence, a higher modulation ratio can be applied, which results in a better quality of the inverter’s waveforms. A clamping circuit is used to reduce the leakage inductance effects of the coupled inductors. As a result, the huge voltage spikes across the inverter bridge are eliminated. In addition, the proposed inverter draws a smooth and continuous input current from the input dc source, which is suitable for renewable energy sources. Detailed, theoretical analysis, simulation and experimental results are provided.
Original languageEnglish (US)
Pages (from-to)1-1
Number of pages1
JournalIEEE Transactions on Circuits and Systems II: Express Briefs
DOIs
StatePublished - Nov 8 2022

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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