Optimal Design And Simulation Of Low Speed Permanent Magnet Linear Motor

Low speed permanent magnet linear motor (LSPMLM) is a new type of motor.It has widely potential application in low speed running straight occasions. As a result of the existence of strong coupling nonlinear system as well as the structural diversity of features, there are no systematic theories and effective methods to solve the kind of motor modeling problem.Firstly, the paper introduces the structure of LSPMLM, analyzing the basic principle and low speed synchronous operation condition with concept of air-gap permeance wave. Secondly, the motor air gap coefficient, vibration coefficient and winding coefficient are solved. The structural characteristics of LSPMLM are in order to calculate magnetic circuit design about the length of the cross-sectional area and the magnetization direction of the motor permanent magnet. And armature reaction potential, winding resistance were derived to calculate the electromagnetic thrust to complete the design of the motor armature.The paper builds optimization objective which is to reduce motor manufacturing cost, selecting the ratio of the electromagnetic force and the volume of the permanent magnet as the objective function, which is under reasonable constraints, using improved genetic algorithm to optimize the motor structure to the establishment of optimization model of motor.Finally, the paper use the finite element software ANSYS to simulate model of optimization motor. The results of the magnetic field of the permanent magnet and the air gap magnetic field are analyzed to prove the rationality of motor design.