Recent content by maxwells_demon

basically, this would be what your circuit would look like if you integrated all those components into one portable unit: assuming you all had the circuit protections and the approriate groundings in place, that switchboard is basically a black box at the moment, depending on what you want it...

for just a while, let's limit our analysis to one stator pole, as follows: with a rotor rotation direction given by the yellow counter-clockwise arrow, and each single coil of your solenoid having its return path being subjected to the same direction of flux, at the same relative rotational...

try and see how the solenoid is wound, and you'll notice you'll run into the exact same question that made you start this thread in the first place. edit: albeit this time, you'll be dealing with voltage polarity instead of direction of force.

indeed. all thanks to stronger permanent magnets (those neodymium magnets are fun to play with, just be careful not to hurt yourself), low reluctivity pole shoes, and precise control circuits, all of which are great for miniaturized/small-scale applications.

ayt, nice one mate.

yup. next, set the rotor as in the second position, but with shaft in line with the needle center. slowly turn the shaft while keeping this position. is there any kind of response from your compass?

can you try and keep the rotor in this position while turning the shaft slowly and see if your compass north stays up, or does it go down at some point along rotation?

hi, I'm trying to grasp your aim behind the experiment you are designing. so far, I'm understanding that you want to be able to demonstrate how changes in one variable affect changes in another? basically, i'd like to understand which "concepts in physics" you are trying to test with this...

try and see if you can get your supplier to give you exactly how that ring magnet is magnetized. turns out there are a lot of ways you can magnetize ring magnets, as per this source. anyway, I'm really hoping your ring magnet is magnetized this way, try and see if you can confirm this...

the only type of videos I can find on youtube that explains BLDC operation is this type. note that the permanent magnets used are ring segments with a designated pole, not a full ring. so let's take this for now. let's address first why this is considered a 3-phase motor. if you watch the...

Brushless DC motor = Stepper motor = "Pole attraction" operation basically they might act as generator by the variation of magnetic flux on each rotor pole using Faraday's Law (which is basically how a transformer works), but the voltage you get is tiny, at this scale. you might want to check...

there's no such thing as a "pole attraction" operation generator, if that's what you're asking. all generators that make use of windings that cut across magnetic flux lines to generate voltage. speaking of which, where's your stator magnets? i don't know man, it looks awfully like a stepper...

that would work. you can then calculate a suitable resistor's ohm value and wattage that way. though i wouldn't get my hopes up too high if i were you. in theory, that setup should turn into a motor. in reality, observe how the windings are not within the flux field lines all the time, because...

It will. but do not connect the battery directly to the generator terminals. You might burn those windings. At least put a resistor in the circuit. Start with large value resistance and wattage, then try next lower resistance values if the setup doesn't start. If you could determine the size of...

Srry wasn't looking at the attachment. I'm on mobile rn. Yup, that motor in your attachment is still a "pole attraction" motor, based on the wiring in that picture. I don't know if it's meant as a simplification, but you are correct. That's not how a motor operated by "force on a...