Performance and thermal reliability comparisons of 2-level and 3-level NPC voltage source inverters for electric vehicle drive applications

Madan, Alican
Two-level and multilevel inverters are widely used in electric vehicle drive applications with different switching techniques. Selection of the topology and the switching technique for electric vehicle drives are getting more important with the trend of designing more compact and more efficient drive circuitry. Reliability of semiconductors in power electronics are under investigation in recent years as well. In this thesis, a multidimensional comparison of two common topologies for a 120 kW electric vehicle PMSM (Permanent Magnet Synchronous Machine) drive system is conducted. Two-level topology and three-level NPC (Neutral Point Clamped) type voltage source inverters are compared in terms of output voltage and current quality, thermal performance, efficiency, switching frequency limitation and semiconductor thermal reliability aspects. Also SPWM (Sinusoidal Pulse Width Modulation) and SVPWM(SpaceVectorPulseWidthModulation) techniques are under investigation.


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Comparison of Two-Level and Three-Level NPC Inverter Topologies for a PMSM Drive for Electric Vehicle Applications
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Multidimensional comparison of two-level and three-level DC/AC converters for a 120 kW permanent magnet synchronous machine (PMSM) drive is carried out in this study. Comparison of two topologies with Sinusoidal Pulse Width Modulation (SPWM) and Space Vector Pulse Width Modulation (SVPWM) by means of output current THD, conduction and switching losses, thermal stresses on semiconductors and switching frequency limitation are investigated at various operating points. Electro-thermal simulation of both topolo...
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Citation Formats
A. Madan, “Performance and thermal reliability comparisons of 2-level and 3-level NPC voltage source inverters for electric vehicle drive applications,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Electrical and Electronics Engineering., Middle East Technical University, 2019.