scholarly journals Results of the experimental investigationof thermal processes in induction motor.

2015 ◽  
Vol 2015 (3) ◽  
pp. 77-82
Author(s):  
Александр Пугачев ◽  
Aleksandr Pugachev ◽  
Денис Бондаренко ◽  
Denis Bondarenko
Keyword(s):  
Induction Motor ◽  
Induction Motors ◽  
Frequency Converter ◽  
Physical Models ◽  
Thermal Processes ◽  
Rotor Speed ◽  
Current Frequency ◽  
Electric Drives ◽  
Stator Current ◽  
Heating And Cooling

The adequacy of researches of characteristics of the traction electric drives with an induction motors by means of scaled physical models is proved by application of two induction motors, 380 and 14 kW. The system of data acquisition and sensors applied to it is described. The technique and results of experimental investigation of thermal processes of heating and cooling in the 14 kW induction motor fed by frequency converter with scalar control and IR-compensation under the low values of the stator current frequency and rotor speed are presented. The rotor bars of the induction motor are determined to be most stressed by overheating under the stator current frequency closed to null, the stator winding becomes the most overheated unit of the induction motor under higher values of the stator current frequency.

scholarly journals The Application of the Bispectrum Analysis to Detect the Rotor Unbalance of the Induction Motor Supplied by the Mains and Frequency Converter

Energies ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 3009
Author(s):  
Pawel Ewert
Keyword(s):  
Spectral Analysis ◽  
Fourier Transform ◽  
Induction Motor ◽  
Induction Motors ◽  
Frequency Converter ◽  
Experimental Tests ◽  
Test Mass ◽  
Mechanical Vibrations ◽  
Stator Current

This article presents the effectiveness of bispectrum analysis for the detection of the rotor unbalance of an induction motor supplied by the mains and a frequency converter. Two diagnostic signals were analyzed, as well as the stator current and mechanical vibrations of the tested motors. The experimental tests were realized for two low-power induction motors, with one and two pole pairs, respectively. The unbalance was modeled using a test mass mounted on a specially prepared disc and directly on the rotor and the influence of this unbalance location was tested and discussed. The results of the bispectrum analysis are compared with results of Fourier transform and the effectiveness of unbalance detection are discussed and compared. The influence of the registration time of the analyzed signal on the quality of fault symptom analyses using both transforms was also tested. It is shown that the bispectrum analysis provides an increased number of fault symptoms in comparison with the classical spectral analysis as well as it is not sensitive to a shorter registration time of the diagnostic signals.

scholarly journals Automatic Temperature Regulation System of Locomotive Traction Induction Motors With Power Losses Minimization

2015 ◽  
Vol 9 (1) ◽  
Author(s):  
A. S. Kosmodamianskiy ◽  
V. I. Vorobiev ◽  
A. A. Pugachev
Keyword(s):  
Induction Motor ◽  
Temperature Regulation ◽  
Induction Motors ◽  
Frequency Converter ◽  
Operating Mode ◽  
Regulation System ◽  
Air Cooling ◽  
Power Losses ◽  
Automatic Temperature ◽  
Stator Current

The air cooling systems are shown to be used to provide required temperature condition of traction induction motors on locomotives. The automatic temperature regulation system is developed for its using to solve such a task. Results of experimental investigation showed that the AO63-4 induction motor stator end winding on the side opposite to air supply is the most heated part of the induction motor. Based on the results of the research, it was used an aperiodic second-order transfer function for approximation of the thermal transient curves. The design of an induction motor control system maintaining operating mode with minimum of the stator current are considered. It is shown that the modes of minimum of the stator current and minimum of power losses are quite close to each other. The MatLab simulation results taking typical nonlinearities and iron power losses in an induction motor and conduction and commutation power losses in semiconductors of frequency converter into account are presented. It is shown that as a result of application of the suggested system the power losses reduction may be led up to 20 % relatively to classical scalar control.

scholarly journals Advanced DSP Control of Induction Motors Using Kalman Filter

2021 ◽  
Author(s):  
Shiping Zhu
Keyword(s):  
Motor Control ◽  
Kalman Filter ◽  
Induction Motor ◽  
Induction Motors ◽  
Research Paper ◽  
Field Oriented Control ◽  
Rotor Speed ◽  
Stator Current ◽  
Speed Sensor ◽  
Rotor Flux

This research paper presents a novel method for the speed control of induction motors without using a speed sensor. The rotor speed can be accurately computed using an optimal control observer named the Kalman filter designed in this research paper. This replaces a speed sensor and eliminates the difficulty of the sensor installation in many applications. This research paper presents an advanced field oriented control of induction motors, based on a specific d-q coordinate model with the d-coordinate chosen to be in line with the rotor flux and the q-coordinate chosen to be 90⁰ lagging. The position of the rotor flux can be accurately computed using the Kalman filter. This eliminates the position sensors required accurately to monitor the flux. This research paper shows that as a result of this specific d-q transformation, the motor torque is proportional to the product of the rotor flux and the q-coordinate stator current. This significantly simplifies the induction motor control, such that the rotor flux is simply controlled by regulating the flux-related d-coordinates stator current and the motor torque is controlled just by regulating the q-coordinate stator current. This research paper presents a computational efficient recursive algorithm for Kalman filter which is specifically designed for the induction motor control. The Kalman filter provides the minimum variance state estimation and tolerates induction motor modelling and measurement errors. The Kalman filter can process all available measurements regardless of their precision (only two input current measurements required for the motor control), and provides a quick and optimal estimate of the variables of interest (the rotor speed and flux selected as outputs), as well as achieves a fast convergence. This research paper presents the digital signal processor (DSP) implementation of the field oriented control of induction motors using Kalman filter. The hardware requirements and all software modules are detailed. The experimental verification of the control method designed in this research paper is provided. Typical measurements are given to demonstrate the efficiency of the novel control presented in this research paper.

scholarly journals Advanced DSP Control of Induction Motors Using Kalman Filter

2021 ◽  
Author(s):  
Shiping Zhu
Keyword(s):  
Motor Control ◽  
Kalman Filter ◽  
Induction Motor ◽  
Induction Motors ◽  
Research Paper ◽  
Field Oriented Control ◽  
Rotor Speed ◽  
Stator Current ◽  
Speed Sensor ◽  
Rotor Flux

This research paper presents a novel method for the speed control of induction motors without using a speed sensor. The rotor speed can be accurately computed using an optimal control observer named the Kalman filter designed in this research paper. This replaces a speed sensor and eliminates the difficulty of the sensor installation in many applications. This research paper presents an advanced field oriented control of induction motors, based on a specific d-q coordinate model with the d-coordinate chosen to be in line with the rotor flux and the q-coordinate chosen to be 90⁰ lagging. The position of the rotor flux can be accurately computed using the Kalman filter. This eliminates the position sensors required accurately to monitor the flux. This research paper shows that as a result of this specific d-q transformation, the motor torque is proportional to the product of the rotor flux and the q-coordinate stator current. This significantly simplifies the induction motor control, such that the rotor flux is simply controlled by regulating the flux-related d-coordinates stator current and the motor torque is controlled just by regulating the q-coordinate stator current. This research paper presents a computational efficient recursive algorithm for Kalman filter which is specifically designed for the induction motor control. The Kalman filter provides the minimum variance state estimation and tolerates induction motor modelling and measurement errors. The Kalman filter can process all available measurements regardless of their precision (only two input current measurements required for the motor control), and provides a quick and optimal estimate of the variables of interest (the rotor speed and flux selected as outputs), as well as achieves a fast convergence. This research paper presents the digital signal processor (DSP) implementation of the field oriented control of induction motors using Kalman filter. The hardware requirements and all software modules are detailed. The experimental verification of the control method designed in this research paper is provided. Typical measurements are given to demonstrate the efficiency of the novel control presented in this research paper.

Online Speed Detection of Induction Motors Based on Tooth Harmonic

2011 ◽  
Vol 58-60 ◽  
pp. 2517-2521
Author(s):  
Qing Xin Zhang ◽  
Hai Bin Li ◽  
Jin Li
Keyword(s):  
Induction Motors ◽  
Rotor Speed ◽  
Motor Speed ◽  
Stator Core ◽  
Current Harmonic ◽  
Stator Current ◽  
Speed Measurement ◽  
Frequency Components ◽  
Air Gap Magnetic Field ◽  
Alveolar Surface

Many methods have been used to detect the motor speed. All of these methods are based on the parameter equation of motor and the detection results are influenced by parameters of induction motor more or less. The research of Speed Measurement method without of Motor parameters effect is very significant. Based on the harmonic generated in the air gap magnetic field by the stator core on the alveolar surface, directly by the analysis and testing of stator current harmonic, the rotor speed is detected which is proportional to the speed of frequency components. Experiment results show that this method is good, and the accuracy achieve a desired effect in real time.

Definition of the Transfer Function Parameters of Asynchronous Motor as an Object of Temperature Control

2014 ◽  
Vol 698 ◽  
pp. 124-130 ◽  
Author(s):  
Alexander Pugachev ◽  
Galina Fedyaeva
Keyword(s):  
Induction Motors ◽  
Transfer Functions ◽  
Thermal State ◽  
Cooling System ◽  
Asynchronous Motor ◽  
Experimental Investigations ◽  
Thermal Processes ◽  
Variable Speed ◽  
Heating And Cooling ◽  
Definition Of

The analysis and systematization of research methods of thermal state of induction motors including traction ones is done. It is shown that for each type of motor it is necessary to develop its own mathematical model of thermal processes, and its verification should be carried out only on the basis of experimental investigations. The structure and operating principles of the complex developed physical model of the traction electric drive with induction motors is represented. The motors have a cooling system with variable-speed electric fan and subsystem of measurement and recording of monitored parameters. The method and the results of experimental study of the processes of heating and cooling of the induction motor are illustrated. Transfer functions and approximation curves of transients are proposed, their parameters are defined.

Zero Stator Current Frequency Operation of Speed-Sensorless Induction Motor Drives Using Stator Input Voltage Error for Speed Estimation

2016 ◽  
Vol 63 (3) ◽  
pp. 1490-1498 ◽  
Author(s):  
Wei Sun ◽  
Xiaofeng Liu ◽  
Jie Gao ◽  
Yong Yu ◽  
Gaolin Wang ◽  
...  
Keyword(s):  
Induction Motor ◽  
Input Voltage ◽  
Motor Drives ◽  
Speed Estimation ◽  
Induction Motor Drives ◽  
Speed Sensorless ◽  
Current Frequency ◽  
Stator Current

scholarly journals Improving the energy efficiency of electric drives for auxiliary units of traction rolling stock

2021 ◽  
Vol 2131 (4) ◽  
pp. 042085
Author(s):  
T S Titova ◽  
A M Evstaf’ev ◽  
A A Pugachev
Keyword(s):  
Energy Efficiency ◽  
Control Systems ◽  
Induction Motor ◽  
Induction Machine ◽  
Rolling Stock ◽  
Electric Drives ◽  
Operating Modes ◽  
Stator Current ◽  
Power Loss Reduction ◽  
Rotor Winding

Abstract The review of technical solutions and schematic characteristics of auxiliary drives for traction vehicles has shown that the most rational variant is an electric drive with an induction machine. Given the operating modes of the auxiliary drives and the share of their power consumption in the total locomotive power, the task of using scalar control systems for induction machines becomes relevant. Based on a mathematical model describing the dynamic energy conversion processes in the T-shape substitution circuit of an induction motor, taking into account stator steel losses and current displacement effects in the rotor winding and saturation along the main magnetic path, possibilities for reducing stator current have been investigated. In order to improve the energy efficiency of electric drives two variants of control system have been proposed. One based on search method of self-tuning to the stator current minimum and the other - on maintaining the power factor of induction motor at the level that ensures equality of active and reactive components of stator current. The hardware and software requirements for implementing control systems have been analysed. Modelling using Matlab has shown that both control systems work - power loss reduction can be as low as 50% and as high as 60% in certain modes.

scholarly journals Performance and Analysis of Indirect Torque Control-Based Three-Phase Induction Motor

ELKHA ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 122
Author(s):  
Andri Pradipta ◽  
Santi Triwijaya ◽  
Mohamad Ridwan
Keyword(s):  
Control System ◽  
Induction Motor ◽  
Induction Motors ◽  
Control Method ◽  
Torque Control ◽  
Stator Current ◽  
Speed Controller ◽  
Three Phase ◽  
20 Nm ◽  
Speed Response

Induction motors are widely used in industrial processes, vehicles and automation. Three-phase induction motors can be used for traction systems on electric locomotives. In this case, the speed control system is an important thing that must be applied to the propulsion system. This study aimed to test the indirect torque control for a Three-phase induction motor. A proportional integral (PI) controller was applied for speed controller. The indirect torque control system was modeled and simulated using PSIM software. According to the result, the control method showed a good performance. The speed could be maintained even the speed reference was changing or a load was applied. The steady state error of the speed response was just 0.1% with rise time around 0.06 s. The stator current went up to 39.5 A in starting condition. The stator current reached 12 A rms when the load of 10 Nm was applied. Then, the current rose to 15.7 A rms when the load was increased to 40 Nm and the current came down to 12.8 A rms when the load was decreased to 20 Nm.

Rotor Speed Estimation of Induction Motor Utilizing Rotor Slot Harmonics Of Stator Current

2021 ◽  
Author(s):  
Morozov Aleksander Vadimovich ◽  
Barsukov Vladimir Konstantinovich
Keyword(s):  
Induction Motor ◽  
Speed Estimation ◽  
Rotor Speed ◽  
Stator Current
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