Implementação de um sistema de controle inteligente de posição radial aplicado em uma máquina de indução como motor-mancal do tipo bobinado dividido

摘要

The development of technology has brought increasing challenges to the productionof consumer goods with a high degree of security and control, and that theyalso present robustness, competitive prices and are ecologically correct. In orderto meet this demand, within its competence, the field of electrical machines engineeringhas significantly improved the quality of these equipments, as well as thecontrol methods, seeking an optimized operation. However, there are still majorlimitations in the increased use of induction machines due to the high maintenancerates of mechanical parts such as bearings, especially when access to these partsis difficult. Because of this, the research area of bearingless motors induction hasbeen progressing, with the aim of minimizing mechanical wear and, consequently,reducing the number of maintenance. It is worth mentioning that these motorshave characteristics similar to conventional induction machines, which add greaterrobustness and practicality, besides having a lower cost. This work describes thestudy and the implementation of the radial position control applied in a three-phaseBearingless Induction Machine with Divided Winding using intelligent control techniquesfor the optimization of the radial positioning. The machine under studyconsists of an induction motor of 3.7 kW, modified to operate as a motor-bearing.In this type of motor with split winding, besides the production of torque, the coilgroups are also responsible for the production of radial forces for rotor positioning.This research proposes a control methodology that uses as a structure a Fuzzy-PDcontroller with proportional and derivative action, based on a set of control rulesformulated in linguistic terms, having as main objective to present an intelligentcontroller for the radial positioning of the rotor. It also illustrates the comparisonbetween the Fuzzy-PD controller and the Derivative Proportional Controller - PDfor radial stabilization. For the evaluation of the controllers, performance criteriabased on the error integral - IAE, ISE and ITAE - were used as a solution to evaluatethe error from its transient and steady state responses. It is noteworthy that allproposed control was developed in a DSP eZdsp TMS320F28335 with floating-pointarchitecture. As for programming, the C language was used. Regarding the modulequestions, the Analog / Digital converter and the PWM outputs were used. Finally,it is emphasized that the control system implemented in the DSP operates with thecurrent and position controllers.