Electromagnetic Coupling Analysis And Research Of High-performance Ironless Permanent Magnet Linear Synchronous Motor

Feeding Servo drive system of Machine tool driven by ILPMLSM (Ironless Permanent Magnet Linear Synchronous Motor) makes load and motor directly connected to the motor primary without intermediate transmission links, so it does not exist the reverse intermediate links gap, inertia lager, lower friction force and stiffness, and therefore better system, inertial smaller, better performance. However, ILPMLSM has also two problems, one is the excessive consumption of permanent magnet and the higher cost of the motor magnet motor processing,the other is lower thrust which is led by the ironless coil.They prevent the widespread application of this type of linear motor together. This paper mainly takes ILPMLSM as the research object, expanding the theoretical analysis and study of this type of linear motor. The main work is as follows:1. To solve the low density and high thrust motors cost, this paper carried out theoretical analysis and optimization of magnetic linear motor, and using finite element analysis and experimental testing results were analyzed to verify.2. From basic motor electromagnetic field analysis, combining the distribution of the air gap magnetic field coupling U-shaped Ironless permanent magnet synchronous linear motor, the first time taking the magnetic field coupling theory analysis method based on Fourier transform and the equivalent magnetizing current combination, establish a unified model, coupling magnetic field obtained theoretical results. The simulation and experimental results show that the method of the theoretical analysis is effective and accuracy to solve the coupled field, providing an effective research tool for the preliminary design of the motor.3. For the U-shaped lower thrust density coreless permanent magnet synchronous linear motor and a higher cost, Both of the two is as design optimization target parameters of the secondary structures of the motor, and selecting the motor size parameters as design variables, defining its value range, by means of MATLAB genetic algorithm toolbox for solving the multi-objective optimization problem, obtain optimal results. The results of Finite element analysis and experiment also show that the multi-objective optimization algorithm is applied to the optimization of the motor and the validity and accuracy of the selected parameters to optimize the effect is significant.4. For the higher cost caused by the motor secondary magnet processing and installation, this paper summarizes the process of the motor parts manufacturing and Installation, designing a private Assembly fixtures for the motor secondary magnet assembly, which improve efficiency and reduce costs.In summary, this paper analyzes the theoretical research and testing prototype development has important practical significance for the subsequent design and development of the U-shaped Ironless permanent magnet synchronous linear motor.