Analysis of Air Gap Magnetic Density for Novel Permanent Magnet Brushless DC Motor
Aiming at the existing single-magnet brushless DC motor with the defects of low air gap magnetic density and large inter-ference magnetic density of for micro-nano satellite momentum flywheel,a novel dual-magnet brushless DC motor was proposed.The structure of the momentum flywheel and the brushless DC motor are introduced,and the corresponded working principle are ex-plained.The mathematical model of the novel brushless DC motor is established based on the equivalent surface current method,and the distribution of the air gap flux density is derived.The effective air gap flux density and interference air gap flux density are ana-lyzed by the finite element method.The results shown that the effective air gap flux density of the novel brushless DC motor is in-creased from 0.45T to 0.55T,the interference air gap flux density is reduced from 0.3 1T to 0.065T,and the flat top width is wid-ened from 54 to 87 which by compared with the traditional brushless DC motor.It shows that the novel structure motor effectively improves the stable performance and torque output performance of the motor,and reduces the power consumption.
Micro-Nano SatelliteNovel Brushless DC MotorEquivalent Surface CurrentFinite Element MethodMagnetic Density Analysis
万方数据
维普
