Jurnal Rekayasa elektrika
Vol 19, No 4 (2023)

Declining Cogging Torque Technique of an Integral Slot Number for Permanent Magnet Machines

Herlina Herlina (Dept. of Electrical Engineering, Sriwijaya University Jl. Raya Palembang – Prabumulih Km. 32, Indralaya Indah, Ogan Ilir, South Sumatera, 30862)
Tajuddin Nur (Dept. of electrical engineering, Atma Jaya Catholic University of Indonesia Jl. Jend. Sudirman No. 51, Jakarta, 12930)
Maria Angela Kartawidjaja (Dept. of electrical engineering, Atma Jaya Catholic University of Indonesia Jl. Jend. Sudirman No. 51, Jakarta, 12930)
Linda Wijayanti (Dept. of Electrical Engineering, Atma Jaya Catholic University of Indonesia, Campus 3, Cisauk Serpong)
Kumala Indriati (Dept. of Electrical Engineering, Atma Jaya Catholic University of Indonesia, Campus 3, Cisauk Serpong)
Sheila Tobing (Energy Systems Engineering Masters Study Program, Faculty of Engineering, University of Indonesia, Jl UI Depok Campus, Depok, West Java, 16424)



Article Info

Publish Date
15 Dec 2023

Abstract

The existence of cogging torque in electric equipment has been considered undesirable. This kind of friction in the air-gap impacts the alignment of flux and the stator slots, resulting in the observed outcome. Consequently, the imposition of restrictions on the rotation of the rotor is employed to generate electrical energy. This research endeavor primarily aims to mitigate the cogging torque of electrical machinery. The current utilization involves employing a total of 3 permanent magnet synchronous machines, often known as inset PMMs, which possess a slot count of 24 and a pole count of 8. The employed technique involves the integration of an optimal pole arc method in conjunction with the implementation of slots cut into the magnet's edge. The machine model under investigation has two fundamental variants, namely Models 1 and 2. These models are equipped with 1one-step slotted (OSS) and 2two-step slotted (TSS) edges on each magnet, in addition to pole arc optimization. The simulation was conducted using the Finite Element Method Magnetics (FEMM) 4.2 software together with LUA scripts, with a focus on rotor rotation ranges of 1 degree. Model 2 exhibited a decrease in cogging torque of 0.01 Nm, whereas Model 1 demonstrated a reduction of 0.015 Nm, and the basic model had a decrease of 0.02 Nm. When implementing a dual-layered cutting edge on a magnet and attempting to optimize its pole arc, it is imperative to consider that the cogging torque's peak magnitude becomes substantially diminished or entirely eliminated.

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Journal Info

Abbrev

JRE

Publisher

Subject

Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

Description

The journal publishes original papers in the field of electrical, computer and informatics engineering which covers, but not limited to, the following scope: Electronics: Electronic Materials, Microelectronic System, Design and Implementation of Application Specific Integrated Circuits (ASIC), VLSI ...