Projeto e Análise do Regulador LQR para o Controle de Velocidade da Máquina de Relutância Variável

Abstract

The use of Switched Reluctance Machine (SRM) has increased in many applications due to its prominent advantages and the development of semiconductors and microcontrollers. The SRM control is especially complex because of its nonlinear nature and parameter variability according to the operation point. This work proposes the utilization of a Linear Quadratic Regulator for SRM speed control. LQR is an optimal control technique that provides good dynamic response and robustness to disturbances and changing parameters. The LQR design procedure for the application is detailed. The proposed controller was compared with other well-known SRM controllers, the Proportional Integral (PI) and the Hysteresis controller (HI). The simulation results demonstrated that LQR provided a compatible dynamic response, better robustness, lower torque ripple, better switching spectral frequency distribution, and less computational burden for implementation.