Analysis And The Linear Motor Thrust Cifanghu Technology Research

The project is derived from Direct-drive technology and its control technologystudy used in High-speed high-precision horizontal machining center, which belongedto the National Science and Technology Major Project and the National Key TechnologyR﹠D Program.the paper is focused on the linear motor which is part of high speed andhigh precision horizontal machining center’s direct-drive technology experimentalplatform, the dissertation analysis and study are distributed into the electromagneticfields distribution and thrust force of linear motor analysisFirstly, the thesis introduces the application status of high speed and high precisionhorizontal machining center and the other application status of the linear motor applyingin the high speed and high precision horizontal machining center, which come from thebackground of the project. On this basis, magnetic field distribution of the linear motorin the static conditions is studied. And then, taking use of the skin effect theory, thethickness of the separated magnetic shields can be solved. According to former resultsand the actual structural of the linear motor experiment platform, the separated magneticshields could be designed successfully. The effect of the separated magnetic also couldbe verified by ANSOFT simulation software. At last the principles and methods ofexperimental verification could be proposed.Secondly, on basis of the equivalent magnetizing current method, the air gap’smagnetic field distribution analytical expression in conditions of ideal situation could beresolved. And then, taking advantage of the common Schwarz-Christophertransformation analyzed the actual permeability of the air gap,therefore, the actualmagnetic fields distribution could be calculated by means of fore work. The work ofsolving the magnetic fields distribution lay the foundation for the linear motor thrustfluctuation analysis.At last, under the premise of determining the specific structure parameters of thelinear motor and phase sequence distribution, the thrust force of the linear motor couldbe simulated and analyzed in the state of the ANSOFT dynamic electromagnetic. underguidance of the theory, the linear motor acceleration experiment could be solved successfully. The thrust deviation between simulated results and experimental resultscould be analysis.