Study On Dynamic Characteristic Of Motor

In order to facilitate the design of high speed, high accuracy and heavy load in machine systems, it is necessary to study on the dynamic response of mechanism. A method of compete dynamic analysis is presented in recent ten years. However, the vibration and the eccentricity of rotor are neglected in the past studies.An asynchronous motor and elastic linkage mechanism is used as an example to study the dynamic response of mechanisms in the dissertation. Based on the air-gap field of the motor in the common working state, the function of magnetic field energy is derived, and the transverse vibration and the torsional vibration are analyzed. A group of dynamic time-varying formulations of the system with nonlinear characteristics of motor are established by way of Lagrange-Maxwell equation. The relation between the dynamic characteristics and the system parameters such as material parameters, electromagnetism parameters, structure parameters, is derived in the dynamic equation.Based the established model of system and the modal superposition, the computational simulation is programmed by the MATLAB. The results of simulation show: the dynamic response in the linkages is affected greatly by the nonlinear coupling relation of electromagnetism, and the established system model will be more accurate in manifesting the real moving principle.In the dissertation, experiment of the rotor—linkages is studied too. This experiment includes: (1) the mechanism is drived by two three-phase AC rotors which has different electromagnetic parameters respectively; (2) the dynamic response in the middle of linkage is taken as the study object; (3) by thecomparative research method the effect which was resulted by the altering the electromagnetic parameters is studied. The results of experiment show: the dynamic characteristic of mechanism will be obvious seen differently by altering the rotor electromagnetic parameters.This work is supported by National Science Foundation of People's Republic of China, under project 'Study on Coupling Dynamics of Motor—Mechanisms Fabricated from Composites Materials' (50175013)...