Research On Optimizing Maximum Electromagnetic Thrust Of Ultra-thin Permanent Magnet Linear Stepper Motor

This paper studies an ultra-thin permanent magnet stepper linear motor(PMSLM)for satellite filter boxes.In the application environment of the filter box in this article,the thickness of a single motor is extremely thin relative to the stroke length of the motor,and it occupies a small space and is strictly limited in size.According to the requirements of the filter box for the actuator,the driving device must drive the filter in the filter box to the specified position in a short time.In order to meet the time requirement of the filter drive,the motor needs to have a large electromagnetic thrust Ensure that the motor is running.Therefore,this article needs to conduct research under the strict space conditions of the filter box to obtain the maximum electromagnetic thrust.First,on the basis of analyzing the size of each group of filters in the filter box actuator,dynamic and static friction,stroke,excitation mode and response time and other indicators,the structure,main dimensions,and number of pole slots of the motor are determined.,Step distance and other constraints,and obtain the preliminary scheme of the motor based on this.Secondly,in order to further maximize the design of the electromagnetic thrust of the motor,the paper selects the magnetic grid method that takes into account the calculation accuracy and speed to carry out the electromagnetic calculation of the motor.The magnetic equivalent circuit(MEC)of the built motor is fully considered The structural characteristics of permanent magnet linear motors and the saturation characteristics of the magnetic circuit in each region of the iron core.The construction and calculation methods of the magnetic grid model and reluctance network of the stator teeth,yoke and transition areas,and the end of the linear motor are studied,and given Matlab has compiled related calculation programs.The comparison and verification of the obtained motor magnetic grid model with the finite element method show that the model has higher accuracy and faster speed.Finally,in order to complete the optimization of the electromagnetic thrust of the motor,this paper establishes an optimal design model of the motor;then introduces the idea of differential evolution and the idea of genetic algorithm to strengthen the information interaction between the empires of the Optimized Imperialistic Competition Algorithm(Optimized Imperialistic Competition Algorithm,OICA),Which makes it more suitable for the multi-variable single-objective optimization design of the motor,and obtains the optimal design scheme of the maximum electromagnetic thrust.The finite element and experimental tests show that the obtained motor scheme meets the thrust and response time of the filter actuator Index research.