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H8 inverter for common-mode voltage reduction in electric drives

By Luca Concari, Davide Barater, Giampaolo Buticchi, Carlo Concari and Marco Liserre


This paper presents a modified two-level three-phase inverter for the reduction of the leakage current. With respect to a traditional two-level inverter, the proposed solution reduces the common-mode voltage (CMV), both in amplitude and frequency. Between the dc source and the traditional three-phase bridge, two active dc-decoupling devices and a voltage-clamping network have been added. A dedicated control strategy was developed adopting a modified space vector pulse-width modulation, oriented to the reduction of the CMV. Simulations showing the good performance of the solution are presented. A preliminary prototype was developed and experimental results are presented

Topics: Common-mode voltage (CMV), drives, H8, inverters, leakage currents, pulse-width modulation (PWM), space vector (SV), three-phase, Control and Systems Engineering, Industrial and Manufacturing Engineering, Electrical and Electronic Engineering
Publisher: 'Institute of Electrical and Electronics Engineers (IEEE)'
Year: 2016
DOI identifier: 10.1109/TIA.2016.2581763
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