An Improved Current-Sensorless Method for Induction Motor Drives Applying Hysteresis Current Controller

Abstract

A novel strategy based on the feed-forward field-oriented control (FOC) method is proposed for the Hysteresis Current technique to control the induction motor (IM) drive without current sensors (CSs). A control scheme is proposed to estimate stator currents from reference rotor flux, rotor flux angle, and state variables as a replacement for the feedback-signal of CSs used in the hysteresis current controller (HCC). Here the rotor flux angle component is extracted from the feed-forward FOC loop. MATLAB/Simulink is applied to implement the simulations under many different operating conditions. The simulation results demonstrated the feasibility of the proposed method to obtain high performance in controlling the IM drives without the current sensors.

An extended sensor fault tolerant control method applied to three-phase induction motor drives

“…The principle of the FDI unit is shown in Table 1. Remark: any appropriate sensorless method with high accuracy can be used to provide a virtual speed signal, such as neural networks [23], MRAS [24], [25], and SMO [26], and virtual currents, such as direct estimation technique [27], [28], and Luenberger observer [29], [30].…”

“…After the fault diagnosis process determines that the sensor signal problem has occurred, reconfiguration is triggered to use the proper estimated signals supplied to the FO control loop instead of the measurement signals. All appropriate sensorless techniques can be applied to provide an estimated signal for the IMD FO control method, such as neural network [23], MRAS [24], [25], and sliding mode observer (SMO) [26], for the estimated speed, or direct estimators [27], [28], Luenberger observer [29], [30], for virtual currents.…”

Operating of DSIM without Current and Speed Sensors Controlled by ADRC Control

“…ese observers guarantee a very good performance [21]. Reference [22] proposes a current estimator from the reference rotor ux, rotor ux angle, and state variables.…”