Which noise model is used in the Asynchronous Machine of SimPowerSystem Module?

I'm trying to simulate an induction motor for detecting broken rotor bars according to analyzing frequency spectrum of stator current.

I would like to know the noise model while performing the Asynchronous Machine SI unit as main component of simulating induction motor.

Thanks a lot!!!!

Answer 1

[Youssef Khmou]

hi, try both : AWGN , and Band limited Noise components .

[MinNan Tsai]

Thank you very much!!

Answer 2

[MinNan Tsai]

Thank you very much for responding!!

But I would like to know the "existed noise model" in the Asynchronous Machine SI unit.

According to the wave shape of output current signals, it seems there are noise signals combined into the ideal signals.

Is there any parameter I could set either 'AWGN' or 'Band limited Noise' in Simulink model?

[Youssef Khmou]

hi MinNan,

1) go to Simulink , and click on "sources" , then look for " Band-Limited White Noise" component , right click on it and select add to " your model". and/or :

2) In the simulink bar in the top , type : " AWGN" and press enter you will see the first result which is " AWGN channel" right click on it and select " add to " your model . and /or :

3) In the SImulink bar : type "noise" , you will see the first result " Gaussian Noise generator" and add it to your model .

So you have many choices , try the one that give reasonable result for your model .

i hope that helps

[MinNan Tsai]

Thank you very much! You help me a lot!!

[MinNan Tsai]

Dear Youssef, I appreciate your kindly help. But I'm not going to add noise model in my simulation model. I would like to know which noise model in Asynchronous Machine SI unit. I need to separate the output signal into noisy and original parts.

[Youssef Khmou]

hi, ah i thought you wanted to simulate the existence of noise, OK in this case you need a Filter component , i propose to try " Kalman Filter" :

In the Matlab command prompt type :

 >>dsplib

A window shows up, choose "Filtering" component a sub windows shows up, choose " Adaptive filters" then choose of the 6 filters there, and for Kalman filter try adjust its parameters as initial conditions etc...

[MinNan Tsai]

Thank you very much!!