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This paper presents a voltage control strategy for a DC load powered by a three phase inverter connected to a Permanent Magnet Synchronous Generator (PMSG). The DC load consists of a DC capacitor in parallel with the inverter and the unknown current load. The control strategy is designed based on Simple Adaptive Control (SAC) technique. The structure is a cascade controller designed in rotor reference...
Variation of rotor resistance in conventional PI-based vector controlled wind driven systems degrades the performance. This paper presents a novel adaptive power control method for the doubly fed induction generator (DFIG) based on the brain emotional learning-based intelligent controller (BELBIC), in which one set of conventional PI controllers are replaced with the soft BELBIC controllers. To obtain...
This paper presents the findings of investigation of decoupled power control of grid-connected doubly fed induction generator (DFIG) based on Adaptive Back Stepping Control (ABSC) technique. The Adaptive Back Stepping control technique offers a systematic stabilizing procedure wherein unwanted cancellation of favourable nonlinearities can be avoided. Incorporation of the proposed controller improves...
The problem of controlling the π-model induction motor with magnetic saturation is considered in this proposed research. The speed sensorless using Adaptive Neuro Fuzzy Inference Systems (ANFIS) technique will be used for the adaptive controller with stator current and speed measurement. This proposed research introduces the use of ANFIS technique for motor speed estimation, so there is no need of...
The problem of controlling the induction motor π-model with magnetic saturation is considered using an adaptive controller with stator current and rotor speed measurement. The new in this paper that in the previous work, only the rotor resistance and load torque can be adapted using the controller but in this work, using artificial intelligent technique, an adaptation of the stator resistance variation...
This paper deals with the synthesis of a stabilizing Backstepping nonlinear control provided with an adaptive Backstepping observer to estimate the rotor flux of an Induction Machine (IM). This approach is based on the vector control strategy by replacing the existing conventional controller with a Backstepping control in order to more quickly bring back the q-axis flux towards zero and to reduce...
Recently, interior permanent magnet synchronous motor (IPMSM) drives are getting more popular in many applications such as electrical vehicles. In order to achieve maximum torque per ampere (MTPA), knowledge of the motor parameters is necessary. Due to the saturation effect, variation of the motor parameters such as inductances is not avoidable. The main contribution of this paper is to use the well...
A sliding-mode observer (SMO) is an important robust control approach. It is applied to estimate the rotor position of an interior permanent magnet synchronous motor (IPMSM) drive incorporating maximum torque per ampere (MTPA). This paper presents a novel adaptive fuzzy-logic controller (FLC) with a sliding mode sensorless control. The resistance has a strong influence to the speed estimation especially...
This paper introduces a new simple sensorless algorithm of estimating the permanent magnet synchronous motor (PMSM) speed and position. The proposed estimation method is implemented using a stator flux/current and a modified back electromotive force (EMF) observer connected in cascade. The flux/current observer based on sliding mode techniques ensures stator currents convergence while the modified...
Field orientation or vector control is an advanced technique used for the development of high-performance permanent magnet synchronous motor (PMSM) drives. In this paper, a field-oriented adaptive nonlinear control for PMSM drives is presented for sensorless control of the speed and field of the motor, simultaneously. The proposed approach is based on a state-dependent Riccati equation (SDRE) control...
This paper propose an adaptive sliding mode observer(SMO) which adds an estimation function for the stator resistance to the conventional sliding mode observer. It is proposed for the robust sensorless control of permanent magnet synchronous motor(PMSM) with variable parameters. The low-pass filter and additional position compensation of the rotor are used to reduce the chattering problem commonly...
This paper introduces a new method of stator resistance identification based on wavelet network in order to improve the low-speed dynamic performance of induction motor in direct torque control. Because of the advantage of wavelet transform, the desired feature of the transient signal can be extracted conveniently from both the magnitudes and arguments of wavelet coefficients and the control precision...
In this paper, we will propose a nonlinear adaptive controller for a linear induction motor to achieve speed tracking. A nonlinear transformation is proposed to facilitate controller design. In this controller, only the primary currents are assumed to be measured. The secondary flux and speed observers are designed to relax the need offlux and speed measurement. Besides, the very unique end effect...
In this paper a nonlinear controller is presented for doubly-fed induction machine (DFIM) drives. The nonlinear controller is designed based on adaptive input-output feedback linearization control technique, using the fifth order model of induction machine in fixed stator d, q axis reference frames with stator currents and rotor flux components as state variables. The nonlinear controller can perfectly...
In this paper, a slip recovery power induction machine drive is introduced which is adaptively vector controlled in the stator flux reference frame. Using this method, the active and reactive powers injected to the stator circuits can be independently controlled so that the drive system is robust and stable against the variations of the electrical parameters and uncertainties. In the proposed control...
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