Analysis of the Effect of Switching Frequency on Acoustic Noise in External Rotor Brushless DC Motors

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dc.contributor.authorEr, Buğra
dc.contributor.authorDemirsoy, Berk
dc.contributor.authorFenercioğlu, Ahmet
dc.date.accessioned2026-02-08T15:08:08Z
dc.date.available2026-02-08T15:08:08Z
dc.date.issued2024
dc.departmentBursa Teknik Üniversitesi
dc.description.abstractElectric motors are actively used in various industries. Acoustic noise is crucial in electric motors, and specific standards are depending on their application areas. Despite better performance, including acoustic noise, than brushed motors, brushless motors still generate acoustic noise due to their mechanical, electrical, and electronic components. This study investigated the impact of varying the switching frequency through the driver on the acoustic noise of an external rotor brushless DC motor. Tests were conducted on a surface-mounted magnet brushless motor with different switching frequencies, and detailed information about the sections of the control board governing the brushless motor was provided. The study includes measurements of motor speed, current, switching frequency, phase signal, and acoustic noise measured at two different locations in decibels. It was observed that the acoustic noise increased at specific switching frequencies. Furthermore, the variation in switching frequency also affected the heating due to losses in the switching elements. Increasing the switching frequency in the 12-28 kHz range reduced motor speed and the measured acoustic noise, while temperature increases were observed in various frequency ranges.
dc.identifier.doi10.17694/bajece.1322919
dc.identifier.endpage104
dc.identifier.issn2147-284X
dc.identifier.issue1
dc.identifier.startpage98
dc.identifier.trdizinid1254160
dc.identifier.urihttps://doi.org/10.17694/bajece.1322919
dc.identifier.urihttps://hdl.handle.net/20.500.12885/4814
dc.identifier.volume12
dc.indekslendigikaynakTR-Dizin
dc.language.isoen
dc.relation.ispartofBalkan Journal of Electrical and Computer Engineering
dc.relation.publicationcategoryMakale - Ulusal Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_TR-Dizin_20260207
dc.subjectBLDC motor
dc.subjectSwitching frequencies
dc.subjectAcoustic noise
dc.titleAnalysis of the Effect of Switching Frequency on Acoustic Noise in External Rotor Brushless DC Motors
dc.typeArticle

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