Speed controller design for three-phase induction motor based on dynamic adjustment grasshopper optimization algorithm

Three-phase induction motor (TIM) is widely used in industrial application like paper mills, water treatment and sewage plants the urban area. In these applications, speed of TIM very important that should be not varying with applied load torque. this study, direct on line (DOL) starting without controller modelled to evaluate response when connected directly main supply. Conventional PI for stator current quadrature are designed as an inner loop well a second conventional outer controlling speed. Proposed combined PI-lead (CPIL) controllers loops improve overall performance compared controller. paper, dynamic adjustment grasshopper optimization algorithm (DAGOA) proposed tuning system. Numerical results based well-selected test function demonstrate DAGOA has better terms convergence, solution accuracy reliability than SGOA. The study revealed currents system using CPIL-DAGOA faster CPIL tuned by Moreover, scheme reached steady state others