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역기전력을 활용한 영구자석 전동기의 동적 편심 검출 방법
강경진(K. J. Kang),장건희(G. H. Jang),송정용(J. Y. Song),서보성(B. S. Seo) 한국소음진동공학회 2015 한국소음진동공학회 학술대회논문집 Vol.2015 No.10
We develop a method to detect the dynamic eccentricity of a permanent magnet (PM) motor by monitoring back electromotive force (BEMF). We derive the mathematical equations of BEMF induced in a tooth and a phase due to dynamic eccentricity of a PM motor. We find that the dynamic eccentricity can be detected by monitoring main harmonic ±1 components of the BEMF induced in a tooth. We also perform the experiment to validate the proposed method by using a PM motor with 8 poles and 12 slots.