Real-Time Switching Number Reduction SVM for a Two-Phase Motor Powered by Three-Level NPC Inverter

Ryszard Beniak, Krzysztof Górecki () and Krzysztof Rogowski ()
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Ryszard Beniak: Automatic Control and Informatics, Faculty of Electrical Engineering, Opole University of Technology, Prószkowska Str. No. 76, 45-758 Opole, Poland
Krzysztof Górecki: Automatic Control and Informatics, Faculty of Electrical Engineering, Opole University of Technology, Prószkowska Str. No. 76, 45-758 Opole, Poland
Krzysztof Rogowski: Automatic Control and Informatics, Faculty of Electrical Engineering, Opole University of Technology, Prószkowska Str. No. 76, 45-758 Opole, Poland

Energies, 2023, vol. 16, issue 2, 1-17

Abstract: A three-level neutral point clamped inverter with three phase legs is often used to power three-phase electrical motors. This type of multilevel inverter has its advantages over two-level inverters. The main advantages are lower harmonic distortion and less stress on motor windings. This three-level inverter can be also used as a power source for a two-phase induction motor. A one-phase induction motor with a starting capacitor and auxiliary windings is in fact a two-phase induction motor. In this article, we show that the switching number reduction method, previously presented for use with three-phase induction motors, can be used with two-phase motors as well, after some crucial modifications. The reduction of switching decreases the switching losses. The switching number reduction is obtained with modified space vector modulation using redundant voltage vectors. The method was simulated and then implemented on a prototype 3L-NPC inverter powering a one-phase induction motor with auxiliary windings. A switching number reduction of about 19% to 29% was obtained, depending on modulation parameters.

Keywords: three-level NPC inverter; multilevel inverter control; two-phase induction motor (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2023
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