Speed Estimation for Sensorless Technology Using Recurrent Neural Networks and Single Current Sensor

Abstract

The use of sensorless technologies is an increasing tendency on industrial drivers for electrical machines. The estimation of electrical and mechanical parameters involved with the electrical machine control is used very frequently in order to avoid measurement of all variables involved in this process. The cost reduction may also be considered in industrial drivers, besides the increasing robustness of the system, as an advantage of the use of sensorless technologies. This work proposes the use of artificial neural networks to estimate one of the most important variables in the induction motor control schemes: the speed. Simulation results are presented to validate the proposed approach.

A Disturbance Rejection Strategy for Asynchronous Motor of the Electric Vehicle in Speed-Open-Loop Operating Mode

“…Great amount of recent research efforts have been focused on the control of electric vehicle to reduce the adverse effects caused by parameter uncertainty [2][3][4][5][6], but have not yet been addressed satisfactorily in disturbance rejection of electric vehicle. Load torque observer based compensation control method has been proposed for the load torque variation of the motor, including asynchronous motor [7][8][9] and permanent magnet synchronous motor [10][11][12]. However, this control method [7][8][9][10][11][12], in which the load torque disturbance is compensated in speed-close-loop of the control system according to the measured speed, is not suitable for the control of electric vehicle in speed-open-loop operating mode.…”

“…Load torque observer based compensation control method has been proposed for the load torque variation of the motor, including asynchronous motor [7][8][9] and permanent magnet synchronous motor [10][11][12]. However, this control method [7][8][9][10][11][12], in which the load torque disturbance is compensated in speed-close-loop of the control system according to the measured speed, is not suitable for the control of electric vehicle in speed-open-loop operating mode. (Note that two operating mode exist to satisfying the relationship between the electric vehicle speed and the pedaling input of the driver, including speed-closed-loop and speed-open-loop, have been existed in electric vehicle).…”