Suppression And Optimization Of The Detent Force Of Permanent Magnet Synchronous Linear Motor

Permanent magnet synchronous linear motor (PMSLM) wide range of applications in modern manufacturing industry has a simple structure, high positioning accuracy, responsive and so on. But its thrust fluctuations affect its development and promotion in the field of high-precision high speed. Detent force (DF) is the main cause of PMSLM thrust fluctuations; therefore, linear motor DF suppress research has a crucial role to its performance and promotion. In this paper, a dual-secondary PMSLM object, starting from the body structure, finite element(FE) analysis of motor DF were analyzed by scanning parameters for motor to suppress DF, analyzed the structure and performance of the main the relationship between the final positioning force measurement combined with modern technology, design a suitable object of the research motor test platform. The main contents are as follows:Firstly, the mechanism PMSLM DF generated mainly caused by cogging and end effect, by equivalent current law and Schwraz-Christoffel transform to establish a motor field analytical equations. Then by the finite element method (FEM) to establish the physical model motors, permanent magnet selection staggered structure, were winding phase, solving the motor thrust, DF and other results, and the introduction of "Total harmonic distortion(THD)" to measure the motor DF space harmonics. Finally, by adjusting the width of the teeth, the longitudinal length of the permanent magnet, the armature width, distance to analyze the dislocation mean motor thrust, and the impact of motor DF amplitude harmonic distortion, and provide a theoretical basis for the DF to suppress research with the reference standard.Then, based on double secondary PMSLM magnetic field analysis and FE model, using scanning parameters continue to deepen the impact of Multi structural properties of linear motors. First, by simultaneously changing the width of the air gap and the permanent magnet motor longitudinal length, to obtain 221 group structure and DF, the thrust of the data and it is drawn into the relationship between the surface summarized Influences on the motor main parameters. Then change mover structure, including an armature core width and width, the data after the same treatment to obtain corresponding results.The purpose of the magnetic field analysis and simulation of the motor to ensure the accuracy of this issue and reliable technical solutions adopted. On the basis of the computational domain simulation, and finally the use of experimental methods to justify the simulation theory, it is the study of the impact of the mutual authentication structure of the motor output characteristics of the motor series, experiments and analysis of the simulation; we can on the structure of the motor optimization. DF combined with modern testing methods to measure the force of the prototype positioning platform; platform designed by the method of measuring the motor stall positioning force. Final this paper designs motor back EMF measurement. Subsequent production to provide a complete motor test system. Modern linear motor DF measurement technique is used more reciprocating bidirectional testing methods. Because DF force mainly refers to the force of the motor sport without incentives, so they need another motor to drive the measured movement like a mover, and then measuring the movement of the magnetic force suffered. Taking into account the presence of the motor mover movement friction when the specific embodiments, while the frictional force is equal in magnitude reciprocating motion, in the opposite direction, it is possible to allow the two frictional forces cancel each other thereby increasing the measurement precision.In summary, this paper equivalent current law and Schwraz-Christoffel transform established motor field analytical equations derived motor air-gap magnetic flux density relation, then farewell to the finite element method to study the structure of the singular individual motor thrust mean, DF amplitude and the impact of total THD, but also by the effects of multi-parameter sweeps structural parameters on the performance of the motor, rendering the associated surface chart based on the data collected, the results show a large number of structural parameters on the motor performance optimization is feasible a. Finally, modern DF testing technology designed a motor measuring platform.