A Stacked 7-Level Common Mode Voltage Eliminated Inverter Scheme with Single DC-link for Open-End Induction Motor Drive

Conference: PCIM Europe 2018 - International Exhibition and Conference for Power Electronics, Intelligent Motion, Renewable Energy and Energy Management
06/05/2018 - 06/07/2018 at Nürnberg, Deutschland

Proceedings: PCIM Europe 2018

Pages: 7Language: englishTyp: PDF

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Yadav, Apurv Kumar; Gopakumar, Kumarukuttan Nair; Potti, Krishna Raj Ramachandran; Umanand, Loganathan (Indian Institute of Science, India)
Matsuse, Kouki; Kubota, Hisao (Meiji University, Japan)

This paper proposes a 7-level common mode eliminated structure for an open-end induction machine (OEIM) using single DC-link with instantaneous control of neutral point voltage. The OEIM is fed with inverters from both sides, with each inverter formed by stacking three 2-level inverter and cascading two H-bridges. The inverters are operated such that zero common mode voltage(CMV) is obtained. All the capacitors in H-bridges are balanced using pole voltage redundancies irrespective of load power factor. No current is drawn from the neutral points of DC-link capacitors, thus the neutral point balancing of DC-link capacitor is achieved. The simulation and experimental results are also included to validate the scheme.