scholarly journals Highly dynamic observer of the magnetic state on the basis of the ventiled inductor motor

2020 ◽  
pp. 37-44
Author(s):  
Andrey Kromm ◽  
◽  
Gennady Simakov ◽  
Sergey Zhuk ◽  
◽  
...  
Keyword(s):  
Vector Control ◽  
High Precision ◽  
Pulse Width Modulation ◽  
Direct Torque Control ◽  
Torque Control ◽  
Flux Observer ◽  
Control Units ◽  
Inductor Motor ◽  
Vector Matrix ◽  
Time Invariant

The article is devoted to the problem of developing highly dynamic flux observers for three-phase inductor motors. The synthesis of the flux observer is based on the analysis of the instantaneous powers of the motor stator by the vector control of drives. The observation algorithm lacks integral, differential and iterative methods of mathematics. The proposed observer algorithm is implemented in a vector-matrix form for its simplest integration into the modern vector control of electric drives. The observer provides stability and high precision in drives with direct torque control, in which the variation in the angle of the spatial voltage vector of the inverter is much higher than in drives with pulse width modulation. The proposed observer algorithm can be used in cost optimized drives, because its implementation does not require “exclusive” resources of microprocessor control units. The paper presents a time invariant observer algorithm that provides high precision of the observed flux at low inductances and low voltages of the inductor motor. The measured and observed moments of the reluctance motor during the acceleration of the drive were analyzed.

A Comparison between Vector Control and Direct Torque Control for the Marine PMSM

2012 ◽  
Vol 542-543 ◽  
pp. 1145-1149
Author(s):  
You Tao Zhao ◽  
Yan Cheng Liu ◽  
Jun Jie Ren
Keyword(s):  
Vector Control ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Direct Torque Control ◽  
Torque Ripple ◽  
Torque Control ◽  
Control Technique ◽  
Modulation Method ◽  
Space Vector ◽  
Simulation Results

In this paper the implementation of the vector control and direct torque control systems for a marine permanent magnet synchronous motor has been studied. A novel control method using space vector pulse width modulation was proposed. Then the simulation models with the vector control and direct torque control using the space vector pulse width modulation method have been established, respectively. Finally, the speed control performance of the systems was verified by simulation. The simulation results indicates that the systems used vector control or direct torque control technique can meet the requirements with the aspect of marine PMSM dynamic torque response. Meanwhile comparing to the different simulation results, the torque ripple was reduced in the vector control system.

scholarly journals Torque Ripple Reduction in DTC Induction Motor Drive

2020 ◽  
Author(s):  
Adhavan Balashanmugham ◽  
Maheswaran Mockaisamy ◽  
Sathiyanathan Murugesan
Keyword(s):  
Induction Motor ◽  
Fuzzy Logic Controller ◽  
Pulse Width Modulation ◽  
Control Strategies ◽  
Direct Torque Control ◽  
Torque Ripple ◽  
Torque Control ◽  
Wear And Tear ◽  
Slip Rings ◽  
Artificial Neural Network Ann

The asynchronous or Induction Motor (IM) is one of the most widely used electrical machines in the world, due to the three following advantages namely 1.Their construction is simple and rugged 2.The absence of slip rings, commutators and brushes make it cheaper, and 3.It is also maintenance free compared to DC motors and Synchronous motor due to wear and tear of brushes, slip rings and commutators respectively. The Section 1 deals with the introduction of induction motor and Direct Torque Control scheme. Section 2 briefly discusses the types of Induction motor. Section 3 tells about the control strategies of Induction motor respectively scalar control and vector control, and also briefly explains about Direct Torque Control (DTC) method. The Section 4 discuss about the Types of Control Strategies for Torque ripple Reductions in DTC as well as the two proposed schemes namely 1.Fuzzy Logic Controller (FLC) for DTC-SVM and 2.Artificial Neural Network (ANN) controller for DTC-SVM respectively for IM and its results, The two proposed schemes uses Hybrid Asymmetric Space Vector Pulse Width Modulation (HASVPWM) for switching the inverter. The Section 5 revels about the modern advanced techniques such as ANN and FLC based DTC.

scholarly journals Feedforward Neural Network-DTC of Multi-phase Permanent Magnet Synchronous Motor Using Five-Phase Neural Space Vector Pulse Width Modulation Strategy

2021 ◽  
Vol 54 (2) ◽  
pp. 345-354
Author(s):  
Fayçal Mehedi ◽  
Habib Benbouhenni ◽  
Lazhari Nezli ◽  
Djamel Boudana
Keyword(s):  
Permanent Magnet ◽  
Pulse Width ◽  
Pulse Width Modulation ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Torque Ripple ◽  
Synchronous Motor ◽  
Torque Control ◽  
Space Vector ◽  
Stator Current

In this work, the direct torque control (DTC) is applied to the five-phase permanent magnet synchronous motor (FP-PMSM). The DTC method based on classical space vector pulse width modulation (SVPWM) is a common solution used to overcome traditional problems; such as stator flux ripple, electromagnetic torque ripple and gives more total harmonic distortion (THD) of the stator current. The actual paper is based on improving the performance of DTC-SVPWM by using the feedforward neural networks (FNNs) instead of the proportional-integral (PI) regulators and hysteresis comparators (HCs) of the conventional SVPWM strategy. This algorithm can solve the traditional PI regulators and HCs problems which are represented in responses dynamic and reduce the torque ripple, flux ripple, and the THD of stator current of FP-PMSM drives. The proposed strategy was tested in different tests with simulation using Matlab software.

scholarly journals A Novel Vector Control Strategy for a Six-Phase Induction Motor with Low Torque Ripples and Harmonic Currents

Energies ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 1102 ◽  
Author(s):  
Hamidreza Heidari ◽  
Anton Rassõlkin ◽  
Toomas Vaimann ◽  
Ants Kallaste ◽  
Asghar Taheri ◽  
...  
Keyword(s):  
Vector Control ◽  
Induction Motor ◽  
Control Strategy ◽  
High Performance ◽  
Direct Torque Control ◽  
Low Frequency ◽  
Torque Control ◽  
Harmonic Currents ◽  
Torque Ripples ◽  
Vector Control Strategy

In this paper, a new vector control strategy is proposed to reduce torque ripples and harmonic currents represented in switching table-based direct torque control (ST-DTC) of a six-phase induction motor (6PIM). For this purpose, a new set of inputs is provided for the switching table (ST). These inputs are based on the decoupled current components in the synchronous reference frame. Indeed, using both field-oriented control (FOC) and direct torque control (DTC) concepts, precise inputs are applied to the ST in order to achieve better steady-state torque response. By applying the duty cycle control strategy, the loss subspace components are eliminated through a suitable selection of virtual voltage vectors. Each virtual voltage vector is based on a combination of a large and a medium vector to make the average volt-seconds in loss subspace near to zero. Therefore, the proposed strategy not only notably reduces the torque ripples, but also suppresses the low frequency current harmonics, simultaneously. Simulation and experimental results clarify the high performance of the proposed scheme.

Simulation Research of Asynchronous Motor Direct Torque Control System Based on MATLAB

2014 ◽  
Vol 577 ◽  
pp. 364-367
Author(s):  
Guo Hong Li ◽  
Yi Li
Keyword(s):  
Vector Control ◽  
Asynchronous Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Simulation Research ◽  
Startup Time ◽  
Vector Theory ◽  
The Difference ◽  
In Virtue Of ◽  
Excellent Stability

Compared with vector control, direct torque control (DTC) spurned coupling idea and canceled circumgyration coordinates transform. By detecting motor’s stator voltage and current, along with calculating motor’s flux and torque in virtue of the instantaneous space vector theory, DTC controlled flux and torque directly according to the difference between the detecting value and design value. DTC also reduced calculation amount and overcomed the flaw that the system was disturbed by motor’s parameters easily, which were the problems in the vector control. On the basis approach mentioned above, this paper realized the system simulation using DTC. Simulation shows that asynchronous motor control has favorable ability of speed adjusting, short startup time, excellent stability.

Sign in / Sign up

Export Citation Format

Share Document