Wavelet Transform for Starting Characteristics of Three-Phase Cage Asynchronous Motor

2011 ◽  
Vol 347-353 ◽  
pp. 2987-2990
Author(s):  
Yuan Yuan Li ◽  
Qi Zhong Liu ◽  
Chao Gang Yu
Keyword(s):  
Wavelet Transform ◽  
Performance Test ◽  
Harmonic Wave ◽  
Asynchronous Motor ◽  
Time Frequency ◽  
First Order ◽  
Stator Current ◽  
Electric Machinery ◽  
Three Phase ◽  
Starting Characteristics

In electric machinery performance test, tooth harmonic time-frequency characters of first order of three-phase cage asynchronous motor are most important. The MATLAB software is used to make model and simulate the starting characteristic of asynchronous motor in this article, while the stator current signal of starting motor is de noised by wavelet transform. Through decomposition and reconstruction of wavelet transform, the amplitude of fundamental and harmonic wave in de noising stator current can be reduced, and then the tooth harmonic of first order of starting rotor is extracted. Using the excellent time-frequency analyzing characters of wavelet package transform, the tooth harmonic time-frequency curve is fitted.

scholarly journals Hilbert versus Concordia transform for three-phase machine stator current time-frequency monitoring

2009 ◽  
Vol 23 (8) ◽  
pp. 2648-2657 ◽  
Author(s):  
Baptiste Trajin ◽  
Marie Chabert ◽  
Jérémi Regnier ◽  
Jean Faucher
Keyword(s):  
Current Time ◽  
Time Frequency ◽  
Stator Current ◽  
Three Phase ◽  
Frequency Monitoring

scholarly journals Fault Detection of Stator Inter-Turn Short-Circuit in PMSM on Stator Current and Vibration Signal

2018 ◽  
Vol 8 (9) ◽  
pp. 1677 ◽  
Author(s):  
Hong Liang ◽  
Yong Chen ◽  
Siyuan Liang ◽  
Chengdong Wang
Keyword(s):  
Fault Detection ◽  
Wavelet Packet ◽  
Short Circuit ◽  
Permanent Magnet Synchronous Motor ◽  
Vibration Signal ◽  
Frequency Method ◽  
Time Frequency ◽  
Stator Current ◽  
Three Phase ◽  
Short Circuit Fault

The stator inter-turn short circuit fault is one of the most common and key faults in permanent magnet synchronous motor (PMSM). This paper introduces a time–frequency method for inter-turn fault detection in stator winding of PMSM using improved wavelet packet transform. Both stator current signal and vibration signal are used for the detection of short circuit faults. Two different experimental data from a three-phase PMSM were processed and analyzed by this time–frequency method in LabVIEW. The feasibility of this approach is shown by the experimental test.

Diagnostics of Stator Winding Faults in a Three-Phase Asynchronous Motor Using Park’s Vector Analysis

Vestnik MEI ◽  
2021 ◽  
pp. 69-74
Author(s):  
Muhammad Deeb ◽  
◽  
Gassan Ibragim ◽  
Talal Assaf ◽  
◽  
...  
Keyword(s):  
Induction Motor ◽  
Short Circuit ◽  
Asynchronous Motor ◽  
Vector Model ◽  
Stator Winding ◽  
Stator Windings ◽  
Stator Current ◽  
Experimental Part ◽  
Three Phase ◽  
Short Circuit Fault

The study addresses the problem of detecting a short circuit fault in the three-phase induction motor winding by monitoring the stator current Park vector (Lissajous curves). Park's vector model is implemented using the Matlab software package. The experimental part of the study was carried out on an 11 kW three-phase induction motor. The Lissajous curves obtained for a healthy motor and a motor with short-circuited turns under various load conditions were compared with each other. The obtained results have demonstrated the effectiveness of the proposed method for detecting interturn short circuit faults in the three-phase stator windings of induction motors.

A Time-Frequency Analysis for the Three-Phase PWM Converter using Wavelet Transform

2014 ◽  
Vol 40 (0) ◽  
pp. 176-181 ◽  
Author(s):  
Ryota IMOTO ◽  
Shin-ichi MOTEGI ◽  
Masakazu MICHIHIRA ◽  
Yasuyuki NISHIDA
Keyword(s):  
Wavelet Transform ◽  
Frequency Analysis ◽  
Pwm Converter ◽  
Time Frequency Analysis ◽  
Time Frequency ◽  
Three Phase

Simulation of Three-Phase Motor Rotor Flux Oriented Control System Based on SVPWM

2013 ◽  
Vol 345 ◽  
pp. 89-93
Author(s):  
Ying Zhan Hu ◽  
Shuo Feng
Keyword(s):  
Pulse Width Modulation ◽  
Asynchronous Motor ◽  
Control Performance ◽  
Excitation Current ◽  
Voltage Space Vector ◽  
Stator Current ◽  
Voltage Vector ◽  
Three Phase ◽  
Rotor Flux ◽  
Application Requirements

In order to improve the control result of three-phase motor with power supplied by battery, it uses voltage vector control technology to control the three-phase motor excitation current and the torque current respectively. At the same time, according to the principle of rotor flux oriented, it get the aim of measuring and controlling the vector of three-phase motor stator current. The research on the way of achieving the algorithm of the voltage space vector pulse width modulation is detailed introduced. By building the simulating model of three-phase asynchronous motor, it simulates the algorithm. As a result, it shows that the algorithm is reasonable, the control performance is better and application requirements of control for three-phase asynchronous motor with power supplied by battery is satisfied.

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 Frequency-current method of controlling an asynchronous three-phase motor

2020 ◽  
Vol 4 (394) ◽  
pp. 129-136
Author(s):  
Anatoly I. Korshunov ◽  
Khomyak A. Valentin ◽  
Irina D. Vasilyeva
Keyword(s):  
Mathematical Model ◽  
Asynchronous Motor ◽  
Current Method ◽  
Current Control ◽  
Computer Hardware ◽  
Motor Speed ◽  
Stator Current ◽  
Three Phase ◽  
The Mathematical Model ◽  
Frequency Current

Object and purpose of research. This paper discusses the method for controlling an asynchronous motor (AM), based on maintaining the optimal frequency of the rotor currents, which corresponds to the maximum electromagnetic moment of the rotor, and controlling its value by regulating the stator currents. Materials and methods. The mathematical model of asynchronous motor adopted in this study assumed the stator to be powered by a controlled three-phase AC generator. The functional diagram of motor speed control system and its digital model in the Matlab Simulink system have been developed. Main results. The constructed mathematical model of AM is correct under condition of smooth changes in set frequency and amplitude of stator currents governed by three-phase stator current control loop practically without error. Conclusion. The proposed method for controlling AM does not require complex calculations and is not too demanding in terms of computer hardware resources.

Time-Frequency Analysis of Partial Discharge Phenomena in SF6 gas using Wavelet Transform

1997 ◽  
Vol 117 (3) ◽  
pp. 338-345 ◽  
Author(s):  
Masatake Kawada ◽  
Masakazu Wada ◽  
Zen-Ichiro Kawasaki ◽  
Kenji Matsu-ura ◽  
Makoto Kawasaki
Keyword(s):  
Wavelet Transform ◽  
Frequency Analysis ◽  
Partial Discharge ◽  
Time Frequency Analysis ◽  
Time Frequency
Sign in / Sign up

Export Citation Format

Share Document