PRINCIPLES OF THE STARTING MOTOR - Department of Defense 1957 - PIN 29892 - ELECTRICAL AND MAGNETIC PRINCIPLES INVOLVED IN THE OPERATION OF THE STARTING MOTOR - HOW ELECTRICAL ENERGY IS CONVERTED TO MECHANICAL ENERGY.
All educational films should be like this. All of them. Although this might lead to some rather more awkward moments if we use films like this to explain the birds and the bees.
Good video, but the poles of an electromagnet are not ON the wires. The magnetic field lines pass through the middle of the loop, at a right angle to the current, so it's as though a bar magnet is going through the middle of the wire loop.
This. I don't understand how most of all technical education videos from all kinds of even the most professional producers (these old black and white ones tend to be the best, but even these...) have that much crucial omissions and even outright mistakes. Besides the error you mentioned, this also failed to mention that in real-world usage, coils are used instead of single loops, and also the overall structure of iron cores - both the armature and stator - was completely omitted to show, which would be quite essential in order to efficiently route the magnetic flux into the place where the two perpendicular ones (stator and armature ones) meet and create force between each other. Also, I would have liked to have at least very simply calculation example of torques and currents with voltages, turns, core sizes, etc. In case this was meant to be theoretical. In case this was meant to be practical, I would have liked to have instructing to replace brushes, bearings, and finding faults on coils.
It was well explained but you must not have watched many MIT lectures. There is a big goof up in this video's explanation, when you have a loop of wire with current in the wire doesn't get a north and south pole, the field lines are always at right angles to a conductor not emanating from them.
Very nice and wil help me for my physics class even though it was made in 1957 XD. But why is there a 2 min blank part at the end of this video, I thought there was going to be more but it ended at 12 min.
I love the format of vintage US Army training videos but... this one contains a major flaw! Saying one side of the loop is the S pole and the other one is the N pole is not right. A current carrying loop of wire effectively becomes an electromagnet with a magnetic moment normal to the current loop. If you want to think of the loop as a magnet, it should have the axis punching through the center of the loop, have (almost) zero length and direction determined by the direction of the current in the loop. As a result the loop won't align with the magnetic field as shown, instead it will place itself at a angle of 90 degrees.
I’m still confused but I do think I know way more than I did. Something about never reaching continuity and using magnetism and pole reversal to get rotational movement. Dope
I just watched that Insane Clown Posse video just to hear that godawful line!! It brings tears to my eyes from laughing so hard. I will never look at a relay the same again after that song.
I'm a big fan of these old film but this video is totally blunder as it's shows wrong position of North and South pole of the electromagnet. It is not the two side of the coper winding that becomes two poles.Actually two poles occers in the perpendicular space of the winding.
lol ! motors PRODUCE enery (mechanical energy). by consuming electrical energy.....and as u said it does not produce energy then wats the purpose of it :D jus for timepass?:)
