Controle e acionamento de máquinas síncronas de ímãs permanentes internos baseado em estratégia MTPA visando elevado desempenho dinâmico e reduzido custo computacional

Abstract

This work presents the study and development of a control system applied for an interior permanent magnet synchronous motor (IPMSM). Due to the increasing use of this type of machine, mainly in the powertrain of electric vehicles, the study and development of control systems to maximize the performance and efficiency is necessary. Initially, mathematical models are obtained from the equivalent electrical circuit and mechanical dynamics analysis. Based on the obtained model, the current and speed controllers are designed in order to perform the speed control of the machine. The controllers were designed and discretized aiming to achieve high performance and efficiency from the machine, added to low computational cost to implementation in microcontrollers. To achieve these goals, PIs (proportional-integral) were used for current and speed control, linked to MTPA (maximum torque per ampere) for torque control. Controllers were designed that, despite suffering the effects of the machine non-linearities, the references are tracked satisfactorily. The control loops were validated through simulations based on Typhoon HIL software. Besides, the MTPA and linear torque controller had their performance compared. Finally, a control system that accomplished satisfactory dynamic performance combined to control laws that require low computational processing for its implementation is developed.