Fuzzy Stator Resistance Estimator of Induction Motor fed by a Three Levels NPC Inverter Controlled by Direct Torque Control

Stator Resistance Compensator Based on Model Reference Adaptive System Scheme for Sensor-Less Direct Torque Control of an Open End-Winding Induction Motor with First Coil Faults

“…The DTC strategy scheme consists of the estimation block for the torque and flux, two hysteresis controllers and two switching table [4]. It is much simpler than the vector control scheme due to the absence of coordinate transformation and a position encoder [12][13][14]. In fact, in order to apply DTC technique to this studied configuration, we define two switching tables, where the first is used to control the inverter 1 and the second to control the inverter 2.…”

“…Firstly, this paper presents a mathematical model by which behavior of OEW-IM with ITSC fault in the same phase can be analyzed. Secondly, a proposed direct torque control technique is used, which offers a good performance, a better reference speed tracking response and robustness under the rotor parameters variation [12][13], but it requires the estimation of the motor parameters to ensure the robustness (particularly, stator resistance) [14], which are used in machine modeling under stator winding fault. Thus, it is important to add an estimation algorithm in order to compensate the variation effects of stator resistance.…”

A Parameter-Free Method for Estimating the Stator Resistance of a Wound Rotor Synchronous Machine

“…This method, unlike the classic model-based methods, does not require flux calculation, but the stator resistance estimation is performed individually only if the speed is available. A stator resistance estimator based on a fuzzy logic controller was also presented in [19] for an induction motor controlled by the DTC technique in which the resistance value is updated during operation. Cheng Luo et al [20] also proposed a "phase-shift"-based method to compensate the stator resistance for motor drives.…”