Problem of calculation of distribution of magnetic field induction in clearance of tubular linear induction motor (TLIM) is considered. Mathematical model is represented by Fredholm integral equations of second kind for complexes of electric field strength and density of coupled magnetization currents at interface of environments. Algorithm of calculation of distribution of magnetic field induction in TLIM clearance has been developed. Dependence of magnetic field induction in motor clearance on value of pole division is investigated. There is area of optimum pole pitch. Reliability of results of calculations on mathematical model is confirmed by their comparison with results obtained on physical model. Calculated dependence of induction on thickness of runner's iron circuit also has extreme character. Given model can be used at design stage of TLIM. Model allows calculating its optimal geometric dimensions based on criterion of maximum induction in motor clearance, taking into account physical properties of applied materials.
Cylindrical linear induction motors are used in the electric drive of manipulators and industrial robots due to their advantages, the main of which are simplicity of design, high manufacturability, unification of units and parts. They provide direct linear movement of the executive body of the manipulator without the use of circular to linear converters. These motors have a closed design, in which the stator winding is protected from direct environmental influences and can be sealed. They are convenient for installation, dismantling and repair. The article describes the design features of linear asynchronous cylindrical motors. A constructive variety of engines is noted, which is due to a specific mechanism with linear movement of the executive body. A review of literature showed that there is no single approach to the name of engines of this type. Different sources use the following names: three-phase cylindrical magnetofugal motor, coaxial linear motor, cylindrical linear asynchronous motor, tubular linear asynchronous motors. The decomposition of the structure. The main structural elements of the engine include the following: a stator, a runner, a runner centering system and an engine cooling system. In practice, engine design options with a fixed and a movable stator are used. In production mechanisms, the following options are used for the design of the stator magnetic circuit: longitudinal plates with grooves; continuous cross washers; transverse sets of washers alternating with stator winding coils, in which longitudinal sets of plates are installed. The three-phase winding of the motor stator is made in the form of coils placed in the stator magnetic circuit and installed in a tubular housing. The decomposition of the structure. The main structural elements of the engine include the following: a stator, a runner, a runner centering system and an engine cooling system. In practice, engine design options with a fixed and a movable stator are used. In production mechanisms, the following options are used for the design of the stator magnetic circuit: longitudinal plates with grooves; continuous cross washers; transverse sets of washers alternating with stator winding coils, in which longitudinal sets of plates are installed. The three-phase winding of the motor stator is made in the form of coils placed in the stator magnetic circuit and installed in a tubular housing.
Methodology of systems analysis has received wide practical application as widespread universal methodology of scientific researches. Its effectiveness is shown in both researches and elaboration of complex objects with large number of connections between structural components, and in process of student learning, especially in higher education system. Features of use of basic principles of system analysis for decision of problems of modeling of objects of power engineering, in particular their representation in disciplines of electric specialties are considered. Examples of definition of categories of systems theory (super system, system, subsystem, element, process) which improve students' understanding of essence of modeling in electro energetic are represented. Importance of consideration of relationships between components of system model, possibility of change of efficiency of functioning ofsystem, and even its functions, when change both components of system and relationships between them are explained. Definition of components of model of type “black box”and sequence of complication of structural model are considered on example of system “Power engineering”. Possible variants of structural models at steps of detailing, their dependence on purpose of research or discipline studied by students are shown.
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