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임형빈(Hyungbin Im),정진태(Jintai Chung) 대한기계학회 2009 대한기계학회 춘추학술대회 Vol.2009 No.11
In this study, the vibration of an electric motor is analyzed when mechanical and electromagnetic interaction is considered. After obtaining the kinetic, potential and magnetic energies for the motor, the equations of motion are derived by using Lagrange’s equation. These equations are nonlinear equations in which the displacement of motor center and the current of coil are coupled to each other. By applying the Newmark time integration method to the equations, the dynamic responses for the displacement and current are computed. It is found that the mechanical responses are influenced by the electromagnetic properties. In particular, it is shown that the variation of air-gap due to vibration induces the inductance of the motor coil.
공극의 시간변화를 고려한 3 상 BLDC 모터의 동특성 해석
박기선(Kisun Park),임형빈(Hyungbin Im),정진태(Jintai Chung) 대한기계학회 2009 大韓機械學會論文集A Vol.33 No.10
In this study, vibrations of an electric motor are analyzed when the motor has the interaction between mechanical and electromagnetic behaviors. For this vibration analysis a 3-phase 8-pole brushless DC motor is selected. Vibrations of the motor are influenced by coupled electromechanical characteristics. The variation of air-gap induced by vibration has an influence on the inductance of the motor coil. To analyze dynamic characteristics of the rotor, we studied inductance by the variation of an air-gap. After obtaining the kinetic, potential and magnetic energies for the motor, the equations of motion are derived by using Lagrange’s equation. By applying the Newmark time integration method to the equations, the dynamic responses for the displacements and currents are computed.