Research On Intergrated Winding Structure Short-Stroke DC Planar Motor

Planar motor is a kind of two-dimensional motor which can directly driven by electromagnetic energy. The features of planar motor are two-dimensional direct-drive, high thrust density, low heat consumption, high accuracy and so on because of omitting a series of converting sets. The planar motor has received wider and wider attention in the academic field and in the industrial field because of the board prospect of its application in the planar 2-D position device, especially in the precision 2-D positioning device. This thesis presents an integrated winding structure short-stroke DC planar motor (IWSDCPM). Based on the combination approach of analysis method and finite element method, this thesis analyzes the motor characteristic, proposes the design method and develops an experimental prototype.First, we derive the analytical expression of air-gap magnetic field generated by permanent magnet arrays based on the magnetic charge method and image method. Furthermore, the analytical expression of thrust force, back electromotive force and self-inductance of coils are obtained. Besides, the dynamic mathematical model of DC planar motor is established.Second, this thesis deals with the electromagnetic design method of DC planar motor. It involves the relation between the main sizes and the dimension of permanent magnets, irons and coils. In addition, we test the variation of thrust force, thrust density and acceleration with different main sizes by optimization.Last, this thesis establishes the FEM model of DC planar motor. The 3-D air-gap magnetic field, thrust force and deflection torque are calculated by finite element analysis. Based on the analysis and simulation, a prototype model is designed and made, and the experiment is done. The experimental results agree with the simulation ones, proving the validity of the experimental prototype and simulations.