Recent content by James Birt

Haha, old school, I like it.

I listened, but that presentation is not in English and trying to read subtitles and watch the examples is confusing.

I didn't even think of that, back to the drawing board.. Thank you again, always something insightful!

So, low magnetic retention to be considered also?

I was under the impression that the electrical resistance would be in the electrical calculations, the armature resistance would be in the motor or RPM calculations and for the magnetism I would only have to concern myself with reluctance. Is that not correct? As per the thread David is...

So yes, using a higher grade of iron would help strengthen the magnetic field, if I'm understanding you correctly. I haven't checked the links yet, it's late... But now that you have my gears turning I may just stay up a bit and give them a look, haha. And knowing the gap between the stator and...

I was assuming that's why the distance in the biot-savart law exists as to know the gap factor.. wouldn't making the MMF stronger at the source give you a stronger field in the gap? Or will it dissipate at the same rate regardless of the initial force?

And the iron I want to use is 95% pure, but it also depends on cost if I go with it or not. The magnetic permeability isn't hard to figure out though.

I misunderstood what you were asking, it will have only one commutator.. thought about self-excited but may be unnecisary. I'll take a look at some other motors and see what makes em tick.. that's an excellent idea. I have plans for the one I want to put together though, but getting a better...

No, I need the motor to function... what would you advise? I'm sure you've worked with them before, I have worked with them enough to understand their function but not enough to easily understand their construction. I know the gap in the commutator can cause interference in the magnetic flux and...

Using an iron core, (2.5x10^-1). As far as commutators, from what I've seen, 2 is a pretty common number on motors the size I'm talking about putting together with many windings.

Ok, I have been using the biot-savart law and that law is for magnetic fields and comes out in Tesla units. So, if the flux density is measured in Teslas then that should be the number I need. Thank you very much for clarifying this for me! I can now move forward with my calculations and...

No, I do not. Did you see my first post about unit conversion? I would really like to know the math.

What formula do you use to find average magnetic flux?? I can get the other numbers, and thanks for the feedback I'm stuck on this.

Yes, that size or slightly larger but you're in the ballpark. I'm just having issues determining if I'll get the right voltage output so I've been studying magnetomotive force and flux density but the math is complex... hey, speaking of the commutator, you know the gap where the brushes jump...