Magnetic viewing film replies
Here are my replies, Ufo:
It is just my way of saying that I do not see a correlation between the patterns on the CRT and magnetic flux from the sample. It is obvious there is an interference between the sample's field and the field produced by the CRT. The CRT is playing an active role whereas the viewing film is passive. I know why the viewing film behaves as it does. I do not know what is going on with the CRT and don't care to find out. Much the same as my take on your attitude about FEMM. And if you were to take an X-ray of a magnet, what would that look like? Maybe I'd care, maybe not. Some tests are interesting to me, some not. Some tests are valid, some not. Some tests are useful, some not. I guess we each decide.
Good for him, but I don't see the link to viewing flux pattern of a sample magnet placed on the other side of the screen. I don't think that was Mr. Thompson's intended use.
Not the shape and location of the field of a free standing sample.
Motor. Generator. Same thing. Just a difference in direction of torque and excitation.
The field does. Like asking which part of the gravitational field does the work when two masses are attracted and moving towards each other. Like you think you could remove part of the field and see the same results? Maybe I don't understand the question.
Take that image of the 2 pole PM motor stator from post #216. Do you think the viewing film image would be the same if the rotor was in place? Try it.
But even then, it is just the fringing and leakage flux which will interact with the viewing film. The main flux is contained within the iron magnetic path except for the air gap between the rotor and stator. Even if you cut the motor in half perpendicular to its axis and placed the viewing film over the cut section, only fringing flux would pass through the film because the useful flux is parallel to it and will not influence the film.
The viewing film cannot sense the magnetic flux inside the magnet or inside the iron. It only reacts to flux passing through it.
Not sure I understand this question. But motors and generators need a gap in the magnetic circuit if they are to rotate. And within a reasonable limit, typically, the smaller that gap is, the better is the machine performance. The gap is the primary reluctance in a well designed motor (or generator) and mmf (excitation) must be supplied to overcome it. That excitation requires power in a wound field machine. In the PM machine, it lowers the useful flux from the magnet.
I tried.
You're welcome.
Regards,
bi
Here are my replies, Ufo:
Originally posted by Ufopolitics
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It means you don't care about the NOBEL PRIZE AWARD WINNER Joseph John Thompson for his outrageous work?
Just one of them...related to our conversation here...:
Just one of them...related to our conversation here...:
Excellent bold out and underlined statements by you Bi...!!
So, you think that all that "Spatial Spectrum" observed in Magnetic Fields through whatever methods is NOT the one that actually makes a motor or a transformer works?
So, you think that all that "Spatial Spectrum" observed in Magnetic Fields through whatever methods is NOT the one that actually makes a motor or a transformer works?
By the way, did you just forget Generators in that list above?...or was it intentional because you are not sure?
So, according to you...which one IS the actual part of the magnetic field that does the real work?
The one intrinsically attached JUST to the IRON CORES INNER MASS PARTICLES of ANY those Machines?...Which are not reflected by any imaging methods?
But even then, it is just the fringing and leakage flux which will interact with the viewing film. The main flux is contained within the iron magnetic path except for the air gap between the rotor and stator. Even if you cut the motor in half perpendicular to its axis and placed the viewing film over the cut section, only fringing flux would pass through the film because the useful flux is parallel to it and will not influence the film.
The viewing film cannot sense the magnetic flux inside the magnet or inside the iron. It only reacts to flux passing through it.
Maybe that is why there MUST BE ALWAYS a very CLOSED GAP, when talking about Motors or Generators in your beliefs?
I would love to hear (sorry, I meant read) your answers to all above questions...
Thanks, and I believe your post above contains the best info you have ever produced on this Thread.
Regards,
bi
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