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매입형 영구자석 전동기의 파라미터 검증을 위한 인덕턴스 산정
이석희(Suk-Hee Lee),이상호(Sang-Ho Lee),반지형(Ji-Hyoung Bahn),홍정표(Jung-Pyo Hong) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
In case of a difference exist between the experimental value and estimated value of back-emf, there can be a difference of tum number or residual flux density of permanent maget of the motor. In order to presume the tum number, the average length for each coil is used to calculate the resistance. However in producing the motor, due to the tension of coil, the outer diameter of coil becomes smaller, and then the resistance estimated by average length for each coil is not correct. Therefore in this paper, through the comparison of experiment value and estimated value of inductance, a method of presuming the tum number and PM's residual flux density of an IPM motor is presented. The inductance of IPM motor changes with the rotor position, therefore the rotor part is taken out and then the inductance in open circuit condition is measured. In the analytical calculation, 3D FEM(Finite Element Method) is used, which can consider the leakage flux of end turns in frinzing effect.