scholarly journals An Effective Decoupling Control with Simple Structure for Induction Motor Drive System Considering Digital Delay

Electronics ◽  
2021 ◽  
Vol 10 (23) ◽  
pp. 3048
Author(s):  
Cheng Wang ◽  
Asem Jaidaa ◽  
Ze Wang ◽  
Lei Lu
Keyword(s):  
Induction Motor ◽  
High Performance ◽  
Simple Structure ◽  
Coupling Effect ◽  
Dynamic Performance ◽  
Digital Processing ◽  
Decoupling Control ◽  
Switching Frequency ◽  
Complex Vector ◽  
Torque Response

Digital processing poses a considerable time delay on controllers of induction motor (IM) driving system, which degrades the effects of torque/flux decoupling, slows the motor torque response down, or even makes the entire system unstable, especially when operating at a low switching frequency. The existing methods, such as feed-forward and feed-back decoupling methods based on the proportional integral controller (PI), have an intrinsic disadvantage in the compromise between high performance and low switching frequency. Besides, the digital delay cannot be well compensated, which may affect the system loop and bring instability. Conventional complex vector decoupling control based on an accurate IM model employs complicated decoupling loops that may be degraded by digital delay leading to discrete error. This article aims to give an alternative complex vector decoupling solution with a simple structure, intended for optimized decoupling and improving the system dynamic performance throughout the entire operating range. The digital delay-caused impacts, including secondary coupling effect and voltage vector amplitude/phase inaccuracy, are specified. Given this, the digital delay impact is canceled accurately in advance, simplifying the entire decoupling process greatly while achieving uncompromised decoupling performance. The simulation and experimental results prove the effectiveness and feasibility of the proposed decoupling technique.

scholarly journals Evaluation of the High Performance Indirect Field Oriented Controlled Dual Induction Motor Drive Fed by a Single Inverter using Type-2 Fuzzy Logic Control

2020 ◽  
Vol 10 (5) ◽  
pp. 6301-6308
Author(s):  
A. Bounab ◽  
A. Chaiba ◽  
S. Belkacem
Keyword(s):  
Fuzzy Logic ◽  
Induction Motor ◽  
Fuzzy Logic Control ◽  
High Performance ◽  
Fuzzy Logic Controller ◽  
Dynamic Performance ◽  
Voltage Source ◽  
Switching Frequency ◽  
Logic Control

In this paper, a high-performance indirect field-oriented controlled dual Induction Motor (IM) drive fed by a single inverter using type-2 fuzzy logic control will be presented. At first, the mathematical model of the IM is implemented in the d-q reference frame. Then, the speed control of the Dual Induction Motor (DIM) operating in parallel configuration with Indirect Field Oriented Control (IFOC) using PI and type-2 Fuzzy Logic Controller (T2-FLC) will be presented. For the control of this system, a DC supply and a Space Vector Pulse Width Modulation (SVPWM) voltage source inverter are introduced with constant switching frequency. Also, the performance of T2-FLC, which is based on the IFOC, is tested and compared to those achieved using the PI controller. The simulation results demonstrate that the T2-FLC is more robust, efficient, and has superior dynamic performance for traction system applications.

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>

scholarly journals A single D.C. link Multi-level 42-sided polygonal Voltage Space Vector Generation with lower order harmonic suppression using Switched-Capacitive filter

2021 ◽  
Author(s):  
Gopakumar K
Keyword(s):  
Induction Motor ◽  
Lower Order ◽  
Low Voltage ◽  
Dynamic Performance ◽  
Low Frequency ◽  
Switching Frequency ◽  
Harmonic Suppression ◽  
Space Vector ◽  
Power Circuit ◽  
Multi Level

<div>Abstract—In this work, a multi-level 42-sided polygonal space vector structure (SVS) for suppression of lower order harmonics for Open-End Induction Motor(OEIM) drive applications is proposed. The proposed power circuit topology consists of two inverters feeding an Open-End Induction Motor from either side. The main inverter fed with a single DC link providing active power for motor operation is switched at low switching frequency. The secondary</div><div>inverter fed with a capacitive supply is switched at high frequency to suppress lower order harmonics upto 39th order, up to the base speed of operation allowing maximum utilization of the DC link. The advantages of lower order harmonic suppression in motor phase voltage, for polygonal space vector structures are combined with multi-level inverter topology. This results in lower switching losses in low frequency switching main inverter and low voltage secondary inverter. Use of a single DC link facilitates four quadrant operation of the inverter. The proposed scheme is validated for steady state and dynamic performance by experimental results.</div>

scholarly journals High –Performance using Neural Networks in Direct Torque Control for Asynchronous Machine

2018 ◽  
Vol 8 (2) ◽  
pp. 1010
Author(s):  
Zineb Mekrini ◽  
Seddik Bri
Keyword(s):  
Neural Networks ◽  
High Performance ◽  
Dynamic Performance ◽  
Direct Torque Control ◽  
Induction Machine ◽  
Numerical Procedure ◽  
Torque Ripple ◽  
Torque Control ◽  
Switching Frequency ◽  
Asynchronous Machine

<p><span>This article investigates solution for the biggest problem of the Direct Torque Control on the asynchronous machine to have the high dynamic performance with very simple hysteresis control scheme. The Conventional Direct Torque Control (CDTC) suffers from some drawbacks such as high current, flux and torque ripple, as well as flux control at very low speed. In this paper, we propose an intelligent approach to improve the direct torque control of induction machine which is an artificial neural networks control. The principle, the numerical procedure and the performances of this method are presented.  Simulations results show that the proposed ANN-DTC strategy effectively reduces the torque and flux ripples at low switching frequency, compared with Fuzzy Logic DTC and The Conventional DTC.</span></p>

scholarly journals A single D.C. link Multi-level 42-sided polygonal Voltage Space Vector Generation with lower order harmonic suppression using Switched-Capacitive filter

2021 ◽  
Author(s):  
Gopakumar K
Keyword(s):  
Induction Motor ◽  
Lower Order ◽  
Low Voltage ◽  
Dynamic Performance ◽  
Low Frequency ◽  
Switching Frequency ◽  
Harmonic Suppression ◽  
Space Vector ◽  
Power Circuit ◽  
Multi Level

<div>Abstract—In this work, a multi-level 42-sided polygonal space vector structure (SVS) for suppression of lower order harmonics for Open-End Induction Motor(OEIM) drive applications is proposed. The proposed power circuit topology consists of two inverters feeding an Open-End Induction Motor from either side. The main inverter fed with a single DC link providing active power for motor operation is switched at low switching frequency. The secondary</div><div>inverter fed with a capacitive supply is switched at high frequency to suppress lower order harmonics upto 39th order, up to the base speed of operation allowing maximum utilization of the DC link. The advantages of lower order harmonic suppression in motor phase voltage, for polygonal space vector structures are combined with multi-level inverter topology. This results in lower switching losses in low frequency switching main inverter and low voltage secondary inverter. Use of a single DC link facilitates four quadrant operation of the inverter. The proposed scheme is validated for steady state and dynamic performance by experimental results.</div>

scholarly journals A single D.C. link Multi-level 42-sided polygonal Voltage Space Vector Generation with lower order harmonic suppression using Switched-Capacitive filter

2021 ◽  
Author(s):  
Gopakumar K ◽  
Rahul Dewani, ◽  
Umanand L ◽  
leopoldo Franquelo ◽  
Rajashekara Kaushik
Keyword(s):  
Induction Motor ◽  
Lower Order ◽  
Low Voltage ◽  
Dynamic Performance ◽  
Low Frequency ◽  
Switching Frequency ◽  
Harmonic Suppression ◽  
Space Vector ◽  
Power Circuit ◽  
Multi Level

<div>In this work, a multi-level 42-sided polygonal space vector structure (SVS) for suppression of lower order harmonics for Open-End Induction Motor(OEIM) drive applications is proposed. The proposed power circuit topology consists of two inverters feeding an Open-End Induction Motor from either side. The main inverter fed with a single DC link providing active power for motor operation is switched at low switching frequency. The secondary inverter fed with a capacitive supply is switched at high frequency to suppress lower order harmonics upto 39th order, up to the base speed of operation allowing maximum utilization of the DC link. The advantages of lower order harmonic suppression in motor phase voltage, for polygonal space vector structures are combined with multi-level inverter topology. This results in lower switching losses in low frequency switching main inverter and low voltage secondary inverter. Use of a single DC link facilitates fourquadrant operation of the inverter. The proposed scheme is validated for steady state and dynamic performance by experimental results.</div>

scholarly journals Enhanced Intelligent Closed Loop Direct Torque and Flux Control of Induction Motor for Standalone Photovoltaic Water Pumping System

Energies ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 8245
Author(s):  
Abderrazek Saoudi ◽  
Saber Krim ◽  
Mohamed Faouzi Mimouni
Keyword(s):  
Induction Motor ◽  
High Performance ◽  
Direct Torque Control ◽  
Torque Control ◽  
Switching Frequency ◽  
Variable Step Size ◽  
Pumping System ◽  
Speed Controller ◽  
Water Pumping ◽  
Perturb And Observe

This paper aims to search for a high-performance low-cost standalone photovoltaic water pumping system (PVWPS) based on a three-phase induction motor (IM). In order to control the IM, a fuzzy direct torque control (FDTC) is proposed in this paper for overcoming the limitations of the conventional direct torque control (CDTC). In fact, the CDTC suffers from several problems such as torque ripples, current distortion, and switching frequency variations. These problems can be solved with the proposed FDTC. To ensure high performance of the PVWPS, the reference torque is generated using a fuzzy speed controller (FSC) instead of a conventional proportional integral speed controller. In order to extract the maximum amount of power, the proposed maximum power point tracking controller is based on variable step size perturb and observe to surmount the weakness of the conventional perturb and observe technique. The performance of the proposed FDTC based on the FSC under variable climatic conditions is demonstrated by digital simulation using Matlab/Simulink. The obtained results show the effectiveness of the suggested FDTC based on the FSC compared with the CDTC in terms of pumped water, reduction in flux and torque ripple, diminution of losses, and decrease in the stator current harmonic.

scholarly journals A single D.C. link Multi-level 42-sided polygonal Voltage Space Vector Generation with lower order harmonic suppression using Switched-Capacitive filter

2021 ◽  
Author(s):  
Gopakumar K ◽  
Rahul Dewani, ◽  
Umanand L ◽  
leopoldo Franquelo ◽  
Rajashekara Kaushik
Keyword(s):  
Induction Motor ◽  
Lower Order ◽  
Low Voltage ◽  
Dynamic Performance ◽  
Low Frequency ◽  
Switching Frequency ◽  
Harmonic Suppression ◽  
Space Vector ◽  
Power Circuit ◽  
Multi Level

<div>In this work, a multi-level 42-sided polygonal space vector structure (SVS) for suppression of lower order harmonics for Open-End Induction Motor(OEIM) drive applications is proposed. The proposed power circuit topology consists of two inverters feeding an Open-End Induction Motor from either side. The main inverter fed with a single DC link providing active power for motor operation is switched at low switching frequency. The secondary inverter fed with a capacitive supply is switched at high frequency to suppress lower order harmonics upto 39th order, up to the base speed of operation allowing maximum utilization of the DC link. The advantages of lower order harmonic suppression in motor phase voltage, for polygonal space vector structures are combined with multi-level inverter topology. This results in lower switching losses in low frequency switching main inverter and low voltage secondary inverter. Use of a single DC link facilitates fourquadrant operation of the inverter. The proposed scheme is validated for steady state and dynamic performance by experimental results.</div>

Sign in / Sign up

Export Citation Format

Share Document