Hi Luk, We are looking into it. It is probably something to do with the server. Once the issue is resolved the simulation will be run automatically. Cheers, Kostas
I am not sure if we are going to make it public for now because we will not be able to manage questions on that. You can send me an email though to discuss this further. Also send me an email for the Erasmus+ youth exchnage, yes we are going ahead with that at some point soon.
I'm trying to use the MagnAFPM tool to simulate the generator described in the "2F wind turbine construction manual" but I receive this error: "It is not possible to build this stator because the coils are overlapping at the average radius of the generator. Try increasing the number of poles."
I find this strange as we have built the generator according to the design in the book and the coils do not overlap. Also in the MagnAFPM tool there is no possibility to input information relating to the size of the coil (for example: Number of turns per coil, Copper wire diameter, Coil leg width)
Could you send me the number of the simulation you are referring to?
We have designed all Hugh's turbines both from the Recipe Book using Neodymium magnets and from the F-series using Ferrite magnets with the OpenAFPM tools and the results are coherent.
Without having looked at your simulation, the first thing I would point out is that with designs of the F-series you need to use the triangular coils option. This might solve your problem.
Regarding your second question for inputing values for the Number of turns per coil, Copper wire diameter, Coil leg width, you can do that when using the UserAFPM tool which assumes you already know the geometry of your generator.
I started a MagnAFPM simulation 5 days ago and it is still queued. Is this a normal wait time? I just want to make sure that I'm not doing anything wrong.
Just tried to simulate the India waterpumper and cannot include decimals at the magnet size. Also, it gives me a error saying the coils do not fit and when I look at the results the magnets are 2mm apart, which does not make sense (IMHO). I am testing at high voltage setting up at 500V as that is the limit. It is a modified 4.2m machine with 20 poles at high voltage (440VAC). It is similar to the grid tie version, but higher voltage.
I have tried desigining a axial flux alternator in your tool and have some queries regarding the same.
When you look at the Terminal Voltage vs Current (Flux Linkage) Plot i am seeing that for a given rpm the Voltage changes with change in current values, when current is low the voltage is also low and when the current is max the voltage is also max.
My Understanding is when you run the Alternator, the alternator terminal voltage starts increasing, its voltage is directly proportional to the number of turns in the phase windings, magnetic flux density and coil resistance, therefore with increase in rpm, terminal voltage also increases.
The moment a load is connected it starts drawing current, at this stage as the current drawn increase the voltage can only drop but cannot increase if the rpm is maintained constant, but in the plot mentioned above both voltage and current increase together can you explain.
Can i please have your email address so that we can communicate directly in this regard
Hey,
my last simulations failed silently.. Any idea what happend? :)
http://wind.stadar.org/simulation/682
Hi Luk, We are looking into it. It is probably something to do with the server. Once the issue is resolved the simulation will be run automatically. Cheers, Kostas
Hey Kostas,
thanks for your reply!
Are you planing to make the Sim Engine public?
I also thought it would be nice to have an API to access the engine.
Luk
btw. Are you guys still planing to do the Erasmus+ youth exchange ?
Hi Luk,
I am not sure if we are going to make it public for now because we will not be able to manage questions on that. You can send me an email though to discuss this further. Also send me an email for the Erasmus+ youth exchnage, yes we are going ahead with that at some point soon.
Thanks,
Kostas
Hi Kostas,
I'm trying to use the MagnAFPM tool to simulate the generator described in the "2F wind turbine construction manual" but I receive this error: "It is not possible to build this stator because the coils are overlapping at the average radius of the generator. Try increasing the number of poles."
I find this strange as we have built the generator according to the design in the book and the coils do not overlap. Also in the MagnAFPM tool there is no possibility to input information relating to the size of the coil (for example: Number of turns per coil, Copper wire diameter, Coil leg width)
Could you shed any light on this issue?
Hi Rory,
Could you send me the number of the simulation you are referring to?
We have designed all Hugh's turbines both from the Recipe Book using Neodymium magnets and from the F-series using Ferrite magnets with the OpenAFPM tools and the results are coherent.
Without having looked at your simulation, the first thing I would point out is that with designs of the F-series you need to use the triangular coils option. This might solve your problem.
Regarding your second question for inputing values for the Number of turns per coil, Copper wire diameter, Coil leg width, you can do that when using the UserAFPM tool which assumes you already know the geometry of your generator.
Thanks,
Kostas
Hi Kostas,
the simulation I was refering to is #750. In the end the UserAFPM tool was all I needed to use.
Many Thanks
Rory
Hey there,
since yesterday the page is not displaying the simulations results, nor output files nor input parameters anymore.
Before that everything worked perfectly.
Any suggestions?
Best, Lea
Hey There,
I started a MagnAFPM simulation 5 days ago and it is still queued. Is this a normal wait time? I just want to make sure that I'm not doing anything wrong.
Thanks,
George
Hi George,
This is not normal. We are looking into it.
Thanks!
Dear Kostas,
Just tried to simulate the India waterpumper and cannot include decimals at the magnet size. Also, it gives me a error saying the coils do not fit and when I look at the results the magnets are 2mm apart, which does not make sense (IMHO). I am testing at high voltage setting up at 500V as that is the limit. It is a modified 4.2m machine with 20 poles at high voltage (440VAC). It is similar to the grid tie version, but higher voltage.
Jorge
Hi Kostas,
Can you please share your email Address, would like to communicate with you on Email, you may PM me on cbeiyer@gmail.com
Hi Kostos,
I have tried desigining a axial flux alternator in your tool and have some queries regarding the same.
When you look at the Terminal Voltage vs Current (Flux Linkage) Plot i am seeing that for a given rpm the Voltage changes with change in current values, when current is low the voltage is also low and when the current is max the voltage is also max.
My Understanding is when you run the Alternator, the alternator terminal voltage starts increasing, its voltage is directly proportional to the number of turns in the phase windings, magnetic flux density and coil resistance, therefore with increase in rpm, terminal voltage also increases.
The moment a load is connected it starts drawing current, at this stage as the current drawn increase the voltage can only drop but cannot increase if the rpm is maintained constant, but in the plot mentioned above both voltage and current increase together can you explain.
Can i please have your email address so that we can communicate directly in this regard
Does anyone here have the contact information of Mr. Kostos ?
You can find his email address on the first page of this paper: Open Access proceedings Journal of Physics: Conference series (iop.org)