| Maglev technology is a kind of electromechanical integration technology making the suspended objects in no-contact state of suspensionby using magnetic. With the help of scientific research units and scholars in various places at home and abroad, maglev technology research is unceasingly developed. In many fields because of the significant advantages its application and popularization progress rapidly in machinery, power electronics, motor friction inhibition, computer studies and so on. Magnetic suspension movement platform research is a hot spot in application research of the technology in recent years.Maglev motion platform is a non-contact support platform which has special advantages, such as no contact, no lubrication, easy maintenance, long service life and high precision. It has a very broad application prospects. In the design of magnetic suspension platform the design and optimization of electromagnets is critical, which is the basis to ensure stable work. In addition, to analysis the characteristics of the bearing capacity of electromagnets is helpful to improve the control precision and stability of the platform, the study of the issues involved has very high theory value and realistic significance. In this paper, by using relevant principle of magnetic levitation technology, set up a new type of maglev motion platform realizing the suspended support and the movement control of the level position. The platform has the characteristics of large span and big air gap. Design and optimize the electromagnet structure of the platform, analyze the bearing capacity characteristics.The following work has been done. Firstly, introduce overall structure of the maglev movement platform and the basic principle, in detail state the working principle of magnetic suspension supporting unit and positioning unit, by the comparative analysis of displacement sensors and power amplifier, choose the type of the displacement sensors and power amplifier for the platform. Secondly, in view of structure features and working characteristics of the magnetic suspension platform with large span and big air gap, design and optimize the electromagnets and the related structural parameters for the platform, make reasonable choice for the ferromagnetic materials, determine the electromagnet static working point and the working air gap. Design the electromagnet coils and iron cores, according to the technical requirements in the system, for the winding way, heat-resisting ability, number of coil turns, wire diameter of the enameled wire, coil inductance and the size of cores select and calculate accordingly. Analyze the loss of electromagnets and calculate the temperature rise. What’s more, in order to improve control capacity of the bearing force, analyze the bearing capacity characteristics of the electromagnet, based on the principles of magnetic circuit design and air gap flux edge effect, structure the magnetic circuit model, calculate and analyze the axial and radial (horizontal) bearing forces and coupling of them, combined with concrete examples of experiments, calculate the bearing capacity and its related parameters. Using the finite element simulation software for simulation analysis and verification, provide a theoretical basis for the axial and radial (horizontal) decoupling control of electromagnets in maglev movement platform. Finally, using the finite element analysis method, based on the parameters of the design of the electromagnets establish the simulation model, analyze and calculate electromagnetic parameters such as the bearing capacity, the magnetic field distribution and magnetic induction intensity and so on. Combining with core smoothing dressing and decorate form of differential electromagnet pole, find shortages in the preliminary using the simulation analysis, further optimize structure, and finally design a magnetic suspension movement platform.Main research contents of this article are the design of electromagnets of the magnetic suspension motion platform, optimization of its related parameters and the analysis of bearing capacity characteristics. Set up a new type of magnetic suspension platform in compliance with performance indicators and technical indicators for this topic. In this paper, the studies on design and optimization process and bearing capacity characteristics of the electromagnets of the maglev movement platform. It has fixed reference meaning for the design of the electromagnet and provides a certain theoretical basis for the calculation and analysis of electromagnetic force. |
PDF Full Text Request