Actually, a transformer can work with direct current as long as one winds both coils (primary and secondary) in the same direction, unlike what is obtainable in a conventionally wound tranformer. After all, a transformer is basically an induction coil linked to another induction coil.
It is common practice to explain how things work with the definition of some “law of science or philosophy”. This is a disservice to thinking students. First because it does not explain how or what is going on and secondly, when it is shown not to be a law when some limited arbitrary condition is changed, the law is no longer valid/true. Lenz’s Law for example only applies as the time constant of the inductor allows the phase change from flowing voltage field to magnetic field. That constant is minimal for a straight inductor, but increases dramatically when the inductor is wound with capacitance. So the resistant reverse field of Lenz’s law no longer directly opposes the incoming magnetic field, and opposes the outgoing magnetic field (timing is everything) to accelerate the rate of change of the inspirating field and amplify the induction effect (giving you more without demanding more, a free lunch) The world could have unlimited power without 3-mile island, or Chernobyl nuclear disasters, or cars and ships without oil and gas pollution; if science didn’t mislead everyone with peurial laws. Don’t listen to a science-philosopher who justifies his designs with laws instead of function.
My! I agree with your reference to it being a disservice. Furthermore, it does seem like these philosophical scientists, as you call them, only try to build according to laws instead building things according to the results that they desire. Someone would keep thinking, law of conservation of energy, therefore I shouldn't do it like this. What if doing it like this IS the most appropriate and efficient way to produce the results that one seeks?
Ok good information about transformer and how it work. i have one question. Some transformer they have around 6.7 voltage but they shaw on the maltimeter 4.5.how come this ?
The 5th is some kind of a midcoil tap. So if secondary produces 24 VAC, a midpoint tap would produce 12 VAC. Transformers and electric motors are related. For household AC fans, say a 3 speed, the shaft speeds (High, Medium, Low) are all the same (or would be ideally with no losses due to bearing friction and rotor aerodynamics). High setting energizes the entire field (stator) winding, Medium uses a 2/3'rds point field tap, and Low uses a 1/3rd point field tap. Stepping down thru H-M-L means less of the field winding is energized, meaning less power (torque) to spin the fan blade as the air resists being moved
Thanks! the channel was originally made in Spanish, currently we don't have enough money to invest in a better quality voice over. As the channel grows we will invest in that :)
Thanks for the video, but this is more like "Basic transformer concepts" and less how it acctually works. For example, the video does not cover why the output waveform depends on the number of turns (a deep dive into Faraday's law) or whether it is in phase with the input.
I would also like a video on a typical wall USB supply for a typical 5vcd cell phone USB charger .. they don't use coils .. I think they are all solid state.
@@samm928 the 'size' of a transformer is directly related to frequency. These typically operate at 100 to 200 KZ and so can be much 'smaller' than a 60HZ transformer. BigClive has done YT videos on this. also look at GreatScott's channel