Sliding Mode Controller Based on Fuzzy Neural Network Optimization for FSPM

2012 ◽  
Vol 229-231 ◽  
pp. 2170-2173
Author(s):  
Zhi Feng Zhang ◽  
Bao Dong Bai ◽  
Guo Xin Zhao
Keyword(s):  
High Performance ◽  
Sliding Mode ◽  
Direct Torque Control ◽  
Variable Structure ◽  
Torque Ripple ◽  
Torque Control ◽  
Sliding Mode Controller ◽  
Control Gain ◽  
Fuzzy Neural ◽  
Low Torque

A sliding mode controller for flux-switching permanent magnet (FSPM) motor is investigated in this paper, in which direct torque control (DTC) concept, variable structure control are integrated to achieve high performance. Then, an FNN is investigated to optimize the control gain matrix of sliding mode controller. The theoretical analyses for the proposed FNN sliding-mode controller are described in detail. Simulation results show that the proposed FNN sliding-mode controller provides low torque ripple and the chattering phenomenon is much reduced.

A Modified Direct Torque Control Based Fuzzy Variable Structure of Permanent Magnet Synchronous Motor

2013 ◽  
Vol 313-314 ◽  
pp. 15-19
Author(s):  
Guo Lin Che ◽  
Hua Lai
Keyword(s):  
High Performance ◽  
Sliding Mode ◽  
Permanent Magnet Synchronous Motor ◽  
Fuzzy Variable ◽  
Direct Torque Control ◽  
Variable Structure ◽  
Torque Ripple ◽  
Torque Control ◽  
Torque Control Strategy ◽  
Sliding Mode Variable Structure

For getting the High-performance electric vehicle control which has good dynamic, static characteristics and robustness, a direct torque control strategy of fuzzy sliding mode variable structure was designed to IPM motor. The method changes torque ripple, speed overshoot, poor anti-disturbance ability of the conventional DTC, and weakened the serious chatting which existed in sliding mode variable structure control. The simulation results show the feasibility and effectiveness.

scholarly journals A Bearingless Induction Motor Direct Torque Control and Suspension Force Control Based on Sliding Mode Variable Structure

2017 ◽  
Vol 2017 ◽  
pp. 1-11 ◽  
Author(s):  
Zebin Yang ◽  
Lin Chen ◽  
Xiaodong Sun ◽  
Weiming Sun ◽  
Dan Zhang
Keyword(s):  
Induction Motor ◽  
Control Method ◽  
Sliding Mode ◽  
Direct Torque Control ◽  
Variable Structure ◽  
Torque Ripple ◽  
Torque Control ◽  
Mode Switching ◽  
Sliding Mode Variable Structure ◽  
Suspension Performance

Aiming at the problems of the large torque ripple and unstable suspension performance in traditional direct torque control (DTC) for a bearingless induction motor (BIM), a new method of DTC is proposed based on sliding mode variable structure (SMVS). The sliding mode switching surface of the torque and flux linkage controller are constructed by torque error and flux error, and the exponential reaching law is used to design the SMVS direct torque controller. On the basis of the radial suspension force mathematical model of the BIM, a radial suspension force closed-loop control method is proposed by utilizing the inverse system theory and SMVS. The simulation models of traditional DTC and the new DTC method based on SMVS of the BIM are set up in the MATLAB/Simulink toolbox. On this basis, the experiments are carried out. Simulation and experiment results showed that the stable suspension operation of the BIM can be achieved with small torque ripple and flux ripple. Besides, the dynamic response and suspension performance of the motor are improved by the proposed method.

scholarly journals Latest Advances in DTC Control of Induction Motors

2020 ◽  
Vol 8 (6S) ◽  
pp. 120-123
Keyword(s):  
Induction Motor ◽  
Predictive Control ◽  
Induction Motors ◽  
Adaptive System ◽  
Sliding Mode ◽  
Direct Torque Control ◽  
Torque Ripple ◽  
Torque Control ◽  
Model Reference Adaptive System ◽  
Model Reference Adaptive

In these days, developments in the area of Induction Motor control is increasing significantly. Considerable advancements have been taken place in the area of Direct Torque Control (DTC), which is capable of providing quick dynamic response with respect to torque and flux. This paper presents a detailed survey on various latest techniques of DTC control of Induction Motor such as DTC-SVM with hysteresis band, DTCSVM with Model Predictive Control, DTC with sliding mode control, DTC with Model reference adaptive system (MRAS) et cetera. The simulation results are discussed for DTC-SVPWM topology and results obtained proves that this method has reduced torque ripple

Constant Switching Frequency and Torque Ripple Minimization of DTC of Induction Motor Drives with Three-level NPC Inverter

2017 ◽  
Vol 8 (3) ◽  
pp. 1035
Author(s):  
Huzainirah Ismail ◽  
Fazlli Patkar ◽  
Auzani Jidin ◽  
Aiman Zakwan Jidin ◽  
Noor Azida Noor Azlan ◽  
...  
Keyword(s):  
Induction Motor ◽  
High Performance ◽  
Direct Torque Control ◽  
Torque Ripple ◽  
Motor Drives ◽  
Torque Control ◽  
Switching Frequency ◽  
Ac Motor ◽  
Hysteresis Controller ◽  
Selection Of

<p>Direct Torque Control (DTC) is widely applied for ac motor drives as it offers high performance torque control with a simple control strategy. However, conventional DTC poses some disadvantages especially in term of variable switching frequency and large torque ripple due to the utilization of torque hysteresis controller. Other than that, performance of conventional DTC fed by two-level inverter is also restricted by the limited numbers of voltage vectors which lead to inappropriate selection of voltage vectors for different speed operations. This research aims to propose a Constant Switching Frequency (CSF) torque controller for DTC of induction motor (IM) fed by three-level Neutral-Point Clamped (NPC) inverter. The proposed torque controller utilizes PI controller which apply different gain for different speed operation. Besides, the utilization of NPC inverter provides greater number of voltage vectors which allow appropriate selection of voltage vectors for different operating condition. Using the proposed method, the improvement of DTC drives in term of producing a constant switching operation and minimizing torque ripple are achieved and validated via experimental results.</p>

A novel DTC scheme for a sensorless five-phase IM drive under open-phase fault

2019 ◽  
Vol 38 (2) ◽  
pp. 829-844
Author(s):  
Hamdi Echeikh ◽  
Hichem Kesraoui ◽  
Ramzi Trabelsi ◽  
Atif Iqbal ◽  
Mohamed Faouzi Mimouni
Keyword(s):  
Degrees Of Freedom ◽  
Sliding Mode ◽  
Direct Torque Control ◽  
Low Frequency ◽  
Variable Structure ◽  
Torque Control ◽  
Theoretical Development ◽  
Content Type ◽  
Open Phase ◽  
Stator Flux

Purpose This paper aims to deal with direct torque controller when the five-phase induction motor drive in faulty operation. Precisely, open-phase fault condition is contemplated. Also, the DTC is combined with a speed-adaptive variable-structure observer based on sliding mode observer. Design methodology/approach Two novel features are presented. First, the concept of the virtual voltage vector is presented, which eliminates low-frequency harmonic currents and simplifies analysis. Second, speed information is introduced into the selection of the inverter states. Findings Direct torque control (DTC) is largely used in traditional three-phase drives as a backup to rotor-stator flux-oriented methods. The classic DTC strategy was primarily designed on the base of hysteresis controllers to control two independent variables (speed, torque and flux). Due to the additional degrees of freedom offered by multiphase machine, extensive works have been extended on the ensemble five-phase drives in healthy operation. In addition, the ability to continue the operation in faulty conditions is considering one of the main advantages of multiphase machines. One can find in the literature different approaches treating this subject. The applicability of DTC after the appearing of a fault has not been enclosed in the literature. Originality/value Theoretical development is presented in details followed by simulation results using Matlab/Simulink to analyze the performance of the drive, comparing with the behavior during healthy situation.

scholarly journals Variable Structure Sliding Mode Control and Direct Torque Control of Wind Power Generation System Based on the Pm Synchronous Generator

2015 ◽  
Vol 66 (3) ◽  
pp. 121-131 ◽  
Author(s):  
Youssef Errami ◽  
Mohammed Ouassaid ◽  
Mohamed Cherkaoui ◽  
Mohamed Maaroufi
Keyword(s):  
Sliding Mode Control ◽  
Sliding Mode ◽  
Direct Torque Control ◽  
Variable Structure ◽  
Synchronous Generator ◽  
Torque Control ◽  
Electrical Network ◽  
Mode Control ◽  
Dc Bus ◽  
Grid Side

Abstract This paper presents a Variable Structure Sliding Mode Control (VS-SMC) scheme and Direct Torque Control (DTC) for Wind Farm (WF) based on the Permanent Magnet Synchronous Generator (PMSG). The WF consists of a 3 PMSGs which are connected to a common dc bus system with rectifier. The dc-bus is connected to the electrical network using only one inverter system, a grid-side filter as well as the transformer. The efficiency of the WF can be greatly improved using an appropriate control approach. So, the control strategy uses the technique of DTC to regulate the speeds of PMSGs for Maximum Power Point Tracking (MPPT) mode. Besides, by employing VS-SMC the grid-side inverter is controlled to inject the generated power into the electrical network, to regulate DC-link voltage and to achieve Unity Power Factor. The used control strategies provide an optimal control solution for WF systems based on the PMSG.

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