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- Title
Torque Ripple Reduction in Brushless Wound Rotor Vernier Machine Using Third-Harmonic Multi-Layer Winding.
- Authors
Zulqarnain, Muhammad; Hammad, Sheikh Yasir; Ikram, Junaid; Bukhari, Syed Sabir Hussain; Khan, Laiq
- Abstract
This article aims to realize the brushless operation of a wound rotor vernier machine (WRVM) by a third-harmonic field produced through stator auxiliary winding (X). In the conventional model, a third-harmonic current is generated by connecting a 4-pole armature and 12-pole excitation windings serially with a three-phase diode rectifier to develop a pulsating field in the airgap of a machine. However, in the proposed model, the ABC winding is supplied by a three-phase current source inverter, whereas the auxiliary winding (X) carries no current due to an open circuit. The fundamental MMF component developed in the machine airgap creates a four-pole stator field, while the third-harmonic MMF induces the harmonic current in the specialized rotor harmonic winding. The rotor on the other side contains the harmonic and the field windings connected through a full-bridge rectifier. The electromagnetic interaction of the stator and rotor fields generates torque. Due to the open-circuited winding pattern, the proposed machine results in a low torque ripple. A 2D model is designed using JMAG-Designer, and 2D field element analysis (FEA) is carried out to determine the output torque and machine's efficiency. A comparative performance analysis of both the conventional and proposed topologies is discussed graphically. The quantitative analysis of the proposed topology shows better performance as compared to the recently developed third-harmonic-based brushless WRVM topology in terms of output torque and torque ripples.
- Subjects
PERMANENT magnets; ELECTRIC current rectifiers; TORQUE; VERNIERS; BRUSHLESS electric motors; MACHINING; ROTORS; ELECTROMAGNETIC interactions; ELECTRIC inverters
- Publication
World Electric Vehicle Journal, 2024, Vol 15, Issue 4, p163
- ISSN
2032-6653
- Publication type
Article
- DOI
10.3390/wevj15040163