Learning Forum

[Mert Rıza Yılmaz]

As seen in the image below, the force graph of the linear induction motor is not stable in Ansys Electronics. I followed the suggestions in this link, but it still doesn't work. I don't know what I'm doing wrong. There may be a very simple rule that I need to learn. I tried hundreds of times but it still didn't work. Please help me 

 

[MirandaH]

Hi, please submit a service request with your model attached, Ansys support engineers will assist.

[Mert Rıza Yılmaz]

 

 

Thank you for reply. Which e-mail address should I send it to?

 

 

[Mert Rıza Yılmaz]

 

I think the problem is that the 3 phase current graph is not smooth. As seen in the image below, there is no waveform as it should be in the 3-phase system, there are increases and decreases. At least the orange and blue phases should be around 24 amps, like the green phase level. I think there are fluctuations in the force graph due to these increases and decreases. Phase A=300*sin(2*pi*60*time), Phase B=300*sin(2*pi*60*time +120deg), Phase C= 300*sin(2*pi*60*time +240deg ). I also tried this like 300*sin(2*pi*60*time + 4*pi/3) phase shift.

As seen in the image below, it remains stable after some time.

 

As seen, when the current becomes stable, the force graph also begins to stabilize.

How can I make this more stable? Or how can I make it stable faster? I really can’t figure out where the problem is. I think the problem is in the wave function of the Voltage, but I’m pretty sure the wave function is correct. I really don’t understand what causes the wave function to be so unstable in the first place.

 

 

 

 

 

 

[Mert Rıza Yılmaz]

I added the circuit, but the force is still not stable. This means that the problem is not in the circuit.

The polarization of the windings of the double-sided linear induction motor is as shown in the image below. Am I making a mistake using this polarization. I tried different polarization types but it didn't work. Or there's instability due to the geometry of the core I use. For instance, is the core's pole pitch too large or the core's neck too short?