The effects of rotor design on the performance of ipm-bldc motors in axial fan applications

Abstract

This study investigates the influence of rotor design on the performance of interior permanent magnet brushless DC (IPM-BLDC) motors used in axial fan applications, which span from industrial cooling systems to automotive technologies. Two alternative rotor topologies with a 12/8 slot–pole configuration were analyzed using finite element analysis (FEA). The evaluation focused on key performance metrics, including torque ripple, cogging torque, and efficiency. The optimized flux-barrier rotor demonstrated a 55.36% reduction in cogging torque, a 1.23% improvement in efficiency, and a 2.23% decrease in torque ripple relative to the baseline design. Based on these results, the superior rotor geometry was prototyped, and the numerical findings were experimentally validated through performance testing. The outcomes confirm that rotor flux-barrier optimization enhances the overall efficiency and operational stability of IPM-BLDC motors in axial fan applications.

Keywords

• IPM
• Axial fan
• Flux barrier
• BLDC motor

Eksenel fan uygulamalarında rotor tasarımının ipm-bldc motorların performansı üzerindeki etkileri

Öz

Bu çalışma, endüstriyel soğutma sistemlerinden otomotiv teknolojilerine kadar geniş bir kullanım alanına sahip eksenel fan uygulamalarında kullanılan içten mıknatıslı fırçasız doğru akım (IPM-BLDC) motorlarının performansı üzerindeki rotor tasarımının etkisini incelemektedir. 12/8 oluk–kutup konfigürasyonuna sahip iki alternatif rotor topolojisi sonlu elemanlar analizi (FEA) yöntemiyle değerlendirilmiştir. İnceleme; tork dalgalanması, vuruntu torku ve verimlilik gibi temel performans metriklerine odaklanmıştır. Optimizasyonu yapılmış akı bariyerli rotor, referans tasarıma kıyasla vuruntu torkunda %55,36 azalma, verimlilikte %1,23 artış ve tork dalgalanmasında %2,23 düşüş sağlamıştır. Bu sonuçlara dayanarak üstün performans gösteren rotor geometrisi prototiplenmiş ve sayısal bulgular performans testleriyle deneysel olarak doğrulanmıştır. Elde edilen sonuçlar, akı bariyeri optimizasyonunun IPM-BLDC motorlarının eksenel fan uygulamalarındaki genel verimliliğini ve çalışma kararlılığını artırdığını doğrulamaktadır.

Anahtar Kelimeler

• IPM
• Eksenel fan
• Akı bariyeri
• BLDC motor

Kaynakça

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