The control strategy is an essential element in the improvement of electric motor energy efficiency through flux adaptation, according to the operating conditions. Therefore, the goal of this paper is to present an energy-efficient field-oriented control structure for squirrel-cage induction motors (IM), improving their energy efficiency and taking into consideration the core loss effect. For this purpose, optimal flux is computed in off-line calculations based on an improved IM dynamic model including core losses. These optimal values are stored in a torque-speed look-up table used to provide the flux reference of the control structure. Simulation and experimental results validate the proposed optimized field-oriented control showing the improvement in energy efficiency and the reduction in power losses. Experimental tests also confirm the improvement of the proposed method, compared to an industrial optimization technique and a state-of-art approach.

根据运行条件，控制策略是通过磁通自适应提高电动机能效的基本要素。因此，本文的目标是提出一种用于鼠笼式感应电机 (IM) 的节能磁场定向控制结构，提高其能效并考虑铁损效应。为此，基于改进的 IM 动态模型（包括磁芯损耗）在离线计算中计算最佳磁通。这些最佳值存储在扭矩-速度查找表中，用于提供控制结构的磁通参考。仿真和实验结果验证了所提出的优化磁场定向控制，显示了能源效率的提高和功率损耗的降低。