Generalized Harmonic Injection Strategy for Multiphase Induction Machine Control

• Published in: IEEE transactions on energy conversion Vol. 39; no. 2; pp. 1245 - 1254
• Main Authors: Haq, Omer Ikram ul, Wu, Yixuan, Peretti, Luca, Bosga, Sjoerd G., Kanchan, R. S.
• Format: Journal Article
• Language: English
• Published: New York IEEE 01-06-2024; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Aerospace electronics; Couplings; Electrical Engineering; Elektro- och systemteknik; Field-oriented control; harmonic injection; Harmonics; Induction motors; Interference; Magnetic flux; Multiphase; multiphase electric machines; online pole changing; optimal torque control; Oscillations; Rotors; Stator windings; Synchronism; Torque; torque density; variable phase-pole machine; Vector spaces
• ISSN: 0885-8969; 1558-0059; 1558-0059
• DOI: 10.1109/TEC.2023.3331233

A multiphase induction machine model using vector space decomposition provides insights into many space harmonics through decoupled reference frames. These decoupled reference frames host specific space vectors related to particular space harmonics. Based on the physical winding configuration, these vector spaces can be excited independently and simultaneously for the production of torque. However, this approach may result in beat oscillations due to interference between excited vector spaces if proper synchronization of vector spaces is not maintained. This paper describes this phenomenon through experimental tests. Furthermore, a solution eliminating the beat oscillations is proposed while optimizing the stator current or rotor flux linkage peaks. The effectiveness of the solution is experimentally verified on a 9-phase induction machine.