Mesin magnet kekal segerak, (MMKS) dikenali sebagai mesin magnet kekal tanpa berus terkenal dalam pelbagai aplikasi industri kerana penyelenggaraan yang rendah, kecekapan tinggi dan ketumpatan tork yang tinggi. Oleh kerana popularitinya, ia adalah penting untuk menyiasat pengaruh tiga corak pemagnetan seperti jejarian, selari dan ideal Halbach pemagnetan ke arah prestasi PMSM. perisian unsur terhingga Opera-2D digunakan untuk menjadi dan meramalkan kesan corak pemagnetan. Pertama, dimensi motor dikira dan geometri motor yang dibina dalam Opera-2D. Jerat sesuai dijana dan
keadaan sempadan yang digunakan untuk model motor. Daripada analisis elemen terhingga, ciri elektromagnet dan prestasi motor seperti ketumpatan fluks sela udara, voltan fasa teraruh, tork penunggalan, tarikan magnet tidak seimbang (UMP), induktan motor dan tork elektomagnetik (EM) dikira. Komponen harmonik voltan fasa teraruh dikira untuk menyiasat jumlah gangguan harmonik dalam gelombang voltan fasa teraruh. Hasilnya, MMKS dengan pemagnetan ideal Halbach membekalkan pemagnetan yang terbaik kerana nilai puncak tork penunggalan, jumlah gangguan harmonic dalam gelombang fasa teraruh, UMP dan riak tork EM yang rendah. PMSM dengan pemagnetan ideal Halbach memberikan kecekapan motor tertinggi dengan 98.86%, manakala kecekapan PMSM dengan pemagnetan jejarian dan pemagnetan selari adalah kira-kira
93%.
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Permanent magnet synchronous machines,(PMSM) are known as permanent magnet brushless machine have gained popularity in many industrial applications due to its low maintenance, high efficiency and high torque density. Due to its popularity, it is importance to investigate the influence of three magnetization patterns such as radial, parallel and ideal Halbach magnetization toward the performance of PMSM. Finiteelement software Opera-2D is used to model and predict the effect of magnetization patterns. First, the motor dimensions are calculated and the motor geometry is built in Opera-2D. Appropriate meshes are generated and boundary conditions are applied to the motor model. From the finite element analysis, the electromagnetic characteristic and performance of motors such as the air gap flux density, phase back-EMF, cogging torque, unbalanced magnetic pull (UMP), inductances of motor and electromagnetic (EM) torque are computed. The phase back-EMF is computed further into its harmonic components to investigate the total harmonic distortion in the phase back-EMF waveforms. After comparing the results, it is noted that PMSMs with ideal Halbach magnetization gives the best option due to low peak cogging torque, total harmonic distortion in the phase back- EMF, UMP and torque ripples. PMSM with ideal Halbach magnetization gives the highest motor efficiency with 98.86%, while the efficiency of PMSM with radial and
parallel magnetization are approximately 93%.
Performance investigation of three-phase permanent magnet synchronous motor using finite element method / Nadila Shafii