| Laser drilling has outstanding advantages such as high precision,high efficiency and low cost.It has been widely used in power electronics,aerospace,medical equipment and other fields.It is an important modern processing technology.Since the laser perforation aperture is usually sub-millimeter,the precise and efficient twodimensional motion platform is the basis for laser drilling and accuracy.Lorenz planar motor is an emerging permanent magnet plane drive technology,which avoids the influence of traditional mechanical transmission system on the accuracy of the motion table.It is an effective way to improve the performance of the laser drilling equipment by directly driving the three-degree-of-freedom plane motion of the motion platform.However,due to the strong interaction between the electromagnetic,structural and temperature of Lorentz plane motors,it is necessary to conduct in-depth research on its design and analysis based on multi-physics analysis technology.The thesis analyzes the working mode of Lorentz plane motor,gives the design indicators and carries out the overall scheme design.According to the design index,the electromagnetic design of Lorentz plane motor is completed by permanent magnet selection,coil calculation,stator shell design and calculation of resistance,inductance,voltage and current.The mover support method using universal ball is proposed,and the selection and verification are carried out.The structural parameters of the motor water-cooled pipeline are designed and calculated using the water-cooling cooling scheme.The electromagnetic field and electromagnetic force of the motor and the influence of electromagnetic on structural deformation are analyzed.Mathematical modeling of permanent magnets and energized coils that can generate permanent magnetic fields is carried out.Through mathematical modeling methods,the factors affecting the strength of the magnetic field are understood,and the distribution of the magnetic field size is visually seen by means of the simulation diagram.Mathematical modeling of electromagnetic force,due to the large amount of modeling calculations,consider using simulation diagrams to reflect the influencing factors of electromagnetic force.Analyze the deformation of the electromagnetic influence structure,simplify the model,and use the simulation comparison analysis to draw conclusions.The internal temperature field and flow field of Lorentz plane motor are analyzed.The related fluid dynamics and heat transfer theory are introduced firstly.The simulation analysis method is used to analyze the internal temperature field and flow field of the motor.The flow velocity and pressure distribution in the pipeline,as well as the temperature distribution of the stator casing under both water and water-free conditions,verified the rationality of the design of the water-cooled structure.The prototype machine is processed,and the experimental test platform is built.The experimental research on the air gap magnetic field,thrust constant and internal temperature of the motor is carried out.The comparison between the air gap magnetic field measurement results and the simulation experiment is obtained.The experimentally determined X-direction thrust constant is 22.5N/A,the Y-direction thrust constant is 30N/A,which is compared with the given thrust constant.The reason for the error is analyzed.The rationality of the design of water-cooled structure is further verified by temperature experiment. |
PDF Full Text Request