The Boot Method Analysis of Three-Phase Asynchronous Motor

2013 ◽  
Vol 401-403 ◽  
pp. 308-311 ◽  
Author(s):  
Miao Shang ◽  
Guo Min Lin ◽  
Qiang Hua Guo ◽  
Yong Tao Sun
Keyword(s):  
Asynchronous Motor ◽  
Advantages And Disadvantages ◽  
Squirrel Cage ◽  
Asynchronous Motors ◽  
Three Phase ◽  
Method Analysis ◽  
Starting Torque

The boot method of three wound-rotor asynchronous motors and three-phase squirrel-cage asynchronous motor are described; As to reduce the start current and to increase the starting torque, the principle of all kinds of startup methods are analyzed; the advantages and disadvantages of various starting methods are evaluated; Development directions of modern motor startup are pointed out.

Detection of Stator and Rotor Faults in Asynchronous Motor Using Artificial Intelligence Method

2018 ◽  
pp. 278-285
Author(s):  
K. Vinoth Kumar ◽  
Prawin Angel Michael
Keyword(s):  
Induction Motor ◽  
Asynchronous Motor ◽  
Feed Forward Neural Network ◽  
Identification Scheme ◽  
Hardware System ◽  
Rotor Faults ◽  
Squirrel Cage ◽  
Three Phase ◽  
Neural Network Structure ◽  
Trained Network

This chapter deals with the implementation of a PC-based monitoring and fault identification scheme for a three-phase induction motor using artificial neural networks (ANNs). To accomplish the task, a hardware system is designed and built to acquire three phase voltages and currents from a 3.3KW squirrel-cage, three-phase induction motor. A software program is written to read the voltages and currents, which are first used to train a feed-forward neural network structure. The trained network is placed in a Lab VIEW-based program formula node that monitors the voltages and currents online and displays the fault conditions and turns the motor. The complete system is successfully tested in real time by creating different faults on the motor.

scholarly journals Operational reliability of low-voltage asynchronous motors at asymmetrical supply voltage

2019 ◽  
Vol 139 ◽  
pp. 01053
Author(s):  
Victoria Romanova ◽  
Sergey Khromov
Keyword(s):  
Low Voltage ◽  
Supply Voltage ◽  
Asynchronous Motor ◽  
Operational Reliability ◽  
Motor Shaft ◽  
Operating Modes ◽  
Squirrel Cage ◽  
Asynchronous Motors ◽  
Technical Solutions ◽  
Supply Systems

Issues of operating modes of 4A series asynchronous squirrel-cage motors and AI serried motors at asymmetrical supply voltage for different values of motor shaft load are considered on the basis of simulation using Matlab software package and Simulink package. In the simulation, currents in asynchronous motor phases were evaluated as a function of K2U, KZ, and based on these results, permissible operation parameters were evaluated for induction motors. The results obtained are the basis for technical solutions aimed at improving operational reliability of asynchronous motors, they will allow taking into account permissible operating parameters of asynchronous motors not only in the design, but also in operation in power supply systems of various facilities.

Design and Analysis of Drive System with Slip Ring Induction Motor for Electric Traction in India

2015 ◽  
Vol 5 (3) ◽  
pp. 374
Author(s):  
Nagamani Chandra Sekara ◽  
Somanatham R ◽  
Chaitanya Kumar U
Keyword(s):  
Induction Motor ◽  
Asynchronous Motor ◽  
Drive System ◽  
Squirrel Cage ◽  
Slip Ring ◽  
Recovery Scheme ◽  
Electric Traction ◽  
Power Recovery ◽  
Starting Torque ◽  
Slip Ring Induction Motor

The use of Squirrel Cage for Traction has revolutionised the motive power of a Locomotive. The Asynchronous Motor is rugged with high starting Torque, has a very smooth Voltage and Speed control as compared to a DC Series Motor. When looking at the Traction perspective, a Slip Ring Induction Motor can be an alternative to the Squirrel Cage Motor as it has higher starting Torque and better efficiency than a Squirrel Cage Motor. the Slip Power Recovery scheme also plays a proactive role as ther can be substantial savings of energy in case of a Slip Ring Induction Motor. A detailed design and analysis of a Drive System with Slip Ring Induction Motor for Electric Traction is presented in this Research Paper

The Mechanical Transient Process at Asynchronous Motor Oscillating Mode

2009 ◽  
Vol 25 (25) ◽  
pp. 23-26
Author(s):  
Uldis Antonovičs ◽  
Viesturs Bražis ◽  
Jānis Greivulis
Keyword(s):  
Transient Process ◽  
Single Phase ◽  
Asynchronous Motor ◽  
Half Period ◽  
Transient Processes ◽  
Negative Voltage ◽  
Stator Windings ◽  
Squirrel Cage ◽  
Three Phase ◽  
Oscillating Mode

The Mechanical Transient Process at Asynchronous Motor Oscillating ModeThe research object is squirrel-cage asynchronous motor connected to single-phase sinusoidal. There are shown, that by connecting to the stator windings a certain sequence of half-period positive and negative voltage, a motor rotor is rotated, but three times slower than in the three-phase mode. Changing the connecting sequence of positive and negative half-period voltage to stator windings, motor can work in various oscillating modes. It is tested experimentally. The mechanical transient processes had been researched in rotation and oscillating modes.

Advanced Fault Diagnosis Monitoring Scheme in Asynchronous Motor Using Soft Computing Method

2019 ◽  
pp. 89-97
Author(s):  
K. Vinoth Kumar ◽  
Ramya K. C. ◽  
Muhammad Irfan
Keyword(s):  
Induction Motor ◽  
Asynchronous Motor ◽  
Feed Forward Neural Network ◽  
Hardware System ◽  
Squirrel Cage ◽  
Soft Computing Method ◽  
Three Phase ◽  
Neural Network Structure ◽  
Computing Method ◽  
Trained Network

This chapter deals with the implementation of a PC-based monitoring and fault identification scheme for a three-phase induction motor using artificial neural networks (ANNs). To accomplish the task, a hardware system is designed and built to acquire three phase voltages and currents from a 3.3KW squirrel-cage, three-phase induction motor. A software program is written to read the voltages and currents, which are first used to train a feed-forward neural network structure. The trained network is placed in a Lab VIEW-based program formula node that monitors the voltages and currents online and displays the fault conditions and turns the motor. The complete system is successfully tested in real time by creating different faults on the motor.

scholarly journals Research of current distribution by phases in asynchronous electric motor with a combined winding

2022 ◽  
Vol 23 (5) ◽  
pp. 150-159
Author(s):  
K. V. Martynov ◽  
L. A. Panteleeva ◽  
D. A. Vasiliev ◽  
E. V. Dresvyannikova
Keyword(s):  
Electric Motor ◽  
Short Circuit ◽  
Asynchronous Motor ◽  
Experimental Sample ◽  
Energy Characteristics ◽  
The Real ◽  
Squirrel Cage ◽  
Three Phase ◽  
Cage Rotor ◽  
Asynchronous Electric Motor

THE PURPOSE. The asynchronous electric motor with a squirrel cage rotor is widely used in the electric driven industry and agricultural machinery. One of the possible ways to improve its energy characteristics is to use a combined 12-zone stator winding instead of the standard 6-zone one. However, in a combined winding with a parallel connection of the «star» and «delta» phases, the phases may not be loaded equally. Therefore, the main purpose of the work under analysis is to study the distribution of currents between the phases of the «star» and «delta» in the asynchronous motor with a combined winding.METHODS. The study was performed on the AIR71V4 engine, rewound onto a combined winding, in which the real ratio of the active resistances of the «delta» and «star» turned out to be 7% less than the theoretical one. The tests were carried out in no-load and short-circuit mode when powered from a three-phase network, as well as in short-circuit mode when one of the line wires is broken.RESULTS. The work gives the values of the currents flowing through the phases of the combined winding. For the experimental sample, the deviation of the obtained currents from the theoretical values is determined. Equations of currents are obtained when one of the linear wires is broken. Schemes for switching on the main contacts of a thermal relay for a motor with a combined winding are proposed.CONCLUSION. The results of the study showed that in an asynchronous motor with a combined winding, in which the real ratio of the active resistances of the «delta» and «star» is less than the theoretical one, the current is not proportionally distributed over the phases. The most preferred circuit for switching on a thermal relay is one in which its main contacts are connected to the «delta» phases, and the thermal relay must be three-pole.

scholarly journals Impact of asymmetrical phenomena on asynchronous three-phase motors in operation mode

2020 ◽  
Vol 61 (3) ◽  
pp. 68-74
Author(s):  
Y Nhu Do ◽  
Thanh Xuan Le ◽  
Ninh Bao Nguyen ◽  
Tuan Thanh Ngo ◽  
Keyword(s):  
Asynchronous Motor ◽  
Operation Mode ◽  
Electric Machines ◽  
Normal Operation ◽  
Electrical System ◽  
Stator Current ◽  
Three Phase ◽  
Effective Operation ◽  
Starting Torque ◽  
Normal Operation Mode

The general theory of three-phase motors is often built based on the assumption that the three phases voltage is symmetrical. However, in practice, this operation mode of the motor cannot be achieved due to a number of reasons such as the structure of the motor is not symmetrical, the load in the electrical system is not balanced. The asymmetry of threephase voltage greatly affects the operation mode of a three-phase asynchronous motor. The most serious affections are: decrease the starting torque, increase stator current and rotor current, vibration inside the motor. This affection will reduce the effective operation of the motor. The paper investigates the effect of asymmetry voltage on the normal operation mode of a three-phase asynchronous motor based on the electromagnetic transforming method of electric machines and simulating on Matlab-Simulink.

scholarly journals Utilization of Two Sensors in Offline Diagnosis of Squirrel-Cage Rotors of Asynchronous Motors

Energies ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6573
Author(s):  
Petr Kacor ◽  
Petr Bernat ◽  
Petr Moldrik
Keyword(s):  
Asynchronous Motor ◽  
High Standard ◽  
Casting Process ◽  
Element Model ◽  
Test System ◽  
Production Costs ◽  
Production Cycle ◽  
Continuous Control ◽  
Squirrel Cage ◽  
Asynchronous Motors

In the manufacture squirrel-cage rotors of asynchronous motors, a high standard of quality is required in every part of the production cycle. The die casting process usually creates porosity in the rotor bars. This most common defect in the rotor often remains hidden during the entire assembly of the machine and is usually only detected during final testing of the motor, i.e., at the end of the production process. This leads to unnecessary production costs. Therefore, the aim is to conduct a continuous control immediately after the rotor has been cast before further processing. In our paper, we are interested in selecting a suitable method of offline rotor diagnostics of an asynchronous motor that would be effective for these needs. In the first step, the selection of the method and its integration into the overall manufacturing process is carried out. The arrangement of the sensors and their calibration is then simulated on a 2D Finite Element Model of the rotor. The proposed offline measurement procedures and technologies are finally validated by testing measurements on a rotor that simulates the most frequently occurring faults. A test system is also developed that provides the operator continuous information about the running rotor measurements and makes it easier to evaluate the quality of the cast rotor by means of graphical visualization of the faults.

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