Open AccessThe Effect of Magnet Structure on the Cogging Torque Reduction in a Permanent Magnet Generator
Author(s) -
Tajuddin Nur,
Yudha Suherman,
. Herlina
Publication year - 2021
Publication title -
xi'nan jiaotong daxue xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.308
H-Index - 21
ISSN - 0258-2724
DOI - 10.35741/issn.0258-2724.56.1.29
Subject(s) - cogging torque , stator , magnet , rotor (electric) , torque , permanent magnet synchronous generator , generator (circuit theory) , finite element method , mechanical engineering , computer science , reduction (mathematics) , control theory (sociology) , engineering , physics , structural engineering , mathematics , power (physics) , geometry , control (management) , quantum mechanics , artificial intelligence , thermodynamics
The cogging torque would still be a constant part of permanent magnet-electric machines. This happens because of the construction in which permanent magnets are attached to the rotor, and a slot is present at the core of the stator. The contact between the two, related to the distance between the magnetic surface and the stator slot, makes it challenging to eliminate the cogging torque. This study aims to maximize cogging torque by reducing it with a new method. The proposed method is a mixture of two techniques that indicate significant promise. This invention mixes two techniques to improve the final results. The first process is called magnetic edge shaping, and the second technique is called a dummy slot on the stator. A fractional slot number (FSN) type with 24 slots and 18 poles is the permanent magnet machine used for this investigation. This work is assisted by software version 4.2 of the Finite Element Magnetic Method (FEMM), which will simulate the original and the proposed design. The proposed method proved to be effective in minimizing the peak value of the cogging torque, as shown by the simulation results of 98% of the initial design. Combining the two techniques may reduce the tangential value of the flux so that the flux leading to the slot is lower than the initial design.