Aportaciones al diseño y caracterización del motor lineal de reluctancia autoconmutado

Resumo

In this study two electromagnetic analytical models have been developed. From this models the main magnetic and mechanics characteristics are obtained, and also permit getting the principal dimensions of the LSRM. From this results a prototype has been built, which has been examined by means of finite elements and experimental tests which corroborate the validity of the contributed analytic models. The study contains the status of art and the classification of the linear actuators as well as the genesis of the LSRM from the rotative counterpart. The LSRM performance is simulated in a Matlab/Simulink simulation model. This model allows us to know the influence of the position shot for the phase current on the average force and therefore the optimal interval conduction phase current. Chapter 2 deals with a new electromagnetic model obtained from analytical simple expressions which permit analyzing and obtaining parameters with a reduced computational cost. Also is studied the endeffects (fringe effects) by analytical expressions and by finite elements. With the objective of quantifying the aforementioned effect on the linked flux versus current characteristic, a correction method is developed. Chapter 3 investigates the influence of the geometric dimensions on the profiles of force and inductance using the method of the finite elements. The geometric relations that optimize the average force are reported. Chapter 4 presents the study of the principal losses of the LSRM, mainly iron losses and copper losses. Once losses have been obtained, an analytical thermal model of lumped parameters is developed from which the thermal behavior is predicted. Chapter 5 presents a systematic methodology for designing the LSRM. This methodology allows us to obtain the main parameters (electric, magnetic, mechanic and geometric), from the given design specifications. The methodology is validated by finite elements. In chapter 6 the analytic models are validated by the construction and essay of a prototype. The experimental results validate the contributions made in this study.