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

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 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.

Three Phase Short Circuit Current Evaluation of Induction Generator for Wind Turbine in Distribution Network

2014 ◽  
Vol 953-954 ◽  
pp. 582-586
Author(s):  
Tao Li ◽  
Zhi Yong Dai ◽  
Ai Qing Luo ◽  
Shu Pan ◽  
Xi Cong Xiong ◽  
...  
Keyword(s):  
Evaluation Method ◽  
Short Circuit ◽  
Distribution Network ◽  
Short Circuit Current ◽  
Simulation Software ◽  
Induction Generator ◽  
Distribution Grid ◽  
Transient Model ◽  
Stator Current ◽  
Three Phase

The transient characteristics of induction generator (IG) were investigated in the paper, and the analytic formula of its stator current under three-phase short circuit in distribution network was derived. According to the change law of IG rotor speed under the grid fault, an evaluation method to determine the current peak of three-phase short circuit for induction generator in distribution grid is proposed. The correctness of the proposed method was verified by the fifth electromagnetic transient model of IG in PSCAD/EMTDC simulation software.

scholarly journals Design Of Speed Controller For Three Phase Induction Motor Using Fuzzy Logic Approach

2018 ◽  
pp. 12-25
Keyword(s):  
Induction Motor ◽  
Low Cost ◽  
Stator Current ◽  
Speed Controller ◽  
Current Controller ◽  
Three Phase ◽  
Fuzzy Logic Approach ◽  
Logic Approach ◽  
And Performance ◽  
Fuzzy Like

The use of Induction Motor (IM) has been increased becuase of it’s robust construction , simple design , and low cost . This paper presents a methodology for the application and performance of Fuzzy like PI Controller to set the frequency of Space Vector Pulse-Width modualtion (SVPWM) Inverter applied to closed loop speed control of IM. When the controller is used with current controller, the quadratic component of stator current is estimated by the controller. Instead of using current controller, this paper proposes estimating the frequency of stator voltage. The dyanamic modelling of the IM is presented by dq axis theory. From the simulation results, the superiority of the suggested controller can be observed in controlling the speed of the three-phase IM.

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