【作者】 师今卓；

【导师】 熊光煜；

【作者基本信息】 太原理工大学 ， 电机与电器， 2005， 硕士

【摘要】 比例电磁阀是液压系统中的一个重要控制元件,液压系统的运行特性很大程度上取决于比例电磁阀的电磁执行器的特性。因此如何提高比例电磁阀执行器的性能指标是该领域中的一个重大课题。直线电机作为比例电磁阀的执行器,具有其潜在的优越性,已经获得了一些应用并受到更多的关注。这也正是本课题研究的目的。 作为电磁阀执行器的直线电机,基本上可分为三种:比例电磁铁,动圈式直线电机,混合式力电机。在二、三、四章中分别介绍了这三种类型的电磁阀执行器。由于比例电磁铁结构简单,造价低,但性能较差,尤其是设计不当时。本文介绍的是一种经过结构优化设计后得到的比例电磁铁,其输出力为准恒定。永磁动圈式直线电机设计合理时,其输出的电磁力与线圈中的电流为正比关系,因此容易被控制,应用场合也较多,本文是对一种永磁动圈式直线电机用简化的解析下的公式做了更多还原

【Abstract】 Proportional electromagnetic valve is an important element in hydraulic pressure systems. The operation behavior of a hydraulic system mainly depends on the characteristic of the electromagnetic actuator used. Therefore, how to improve property of the actuator (driver) used for proportional valve is an important subject in the field. As an actuator driving a proportional valve, linear motor has its potential advantages, so has been found some applications and attracts in researcher’s attention. As the same reason, it is the purpose of the study in this thesisLinear motor as driver of electromagnetic valve may be divided into three kinds, proportional solenoid, permanent magnetic moving winding linear motor and hybrid linear force motor. Inchapter two, chapter three, and chapter four of this thesis, each kinds of the three kinds of actuator is presented respectively. Proportional solenoid has the advantages of simple structure and cheap cost, but hard to get the good property by designing. In this thesis a well designed proportional solenoid is introduced. The solenoid can output quasi constant force within a certain displacement range. Permanent magnetic moving winding liner motor can offer good force-displacement characteristic and the force is proportional to winding current. So it can be controlled easily and can be used in many situations. A simple analytical formulas derived in this thesis are used to design this kind of motor. The results calculated are the same as those calculated by Finite Element Method and so to prove the correctness of the method presented. Hybrid linear force motor because of high output force and easily control may be used in many situations. A kind of linear motor produced by Moog company is analyzed here, A sample linear force motor is made on the basis of the analysis. And then output force characteristics by measured are obtained by experiment. The results of experiment prove that the theory results are correct.This thesis presents two approaches analytical method and finite element method. Analytical method is a kind of simple approach for magnetic calculation. It may get the analytical formulas to calculate the parameter of the motor approximately under some equivalent conditions. The finite element method can get the exact results, but can not find the relationship about the parameters in an analytical form, besides, the calculation process is complex. Now, with the development of computer finite element field analysis be comes easy to use. The solvers used in here are Magnetostatic solver and Transient solver of Ansoft. This solver can clearly display the result curve when every parameter varies. In the second chapter, parameter calculation solver in Magnetostatic is used for getting output curves when special dimension of the actuator is changed. In the third chapter finite element field method prove that the results are correct calculated by analytical approach. In the forth chapter a actual linear force motor is analyzed by finite element method. The experiment results are very close to the results calculated by finite element field method, and it proves that the calculation solutions are correct. Using the Transient solver,transient characteristics are obtained under the conditions supplied certain voltage. The research results can offer the theory base for the further application to control system.更多还原