Quote
NoobMan
Quote
bobc
That is not how an inductor works. Flux is generated from the current. Even in an inductor, voltage generates the current. It does not just grow by itself.Quote
NoobMan
So again, its not a current sinusoid that is generated eslewhere than forced into the coil. Current just grows in the coil as result of playing with voltage, and that is the elemental law of the inducutor. Voltage across inductor builds the flux, to which the current is proportional. Now if you understand that, you will see previous statements differently and, even if most ppls dont see it, some other parts.
An inductor only generates current "by itself" when you remove the external voltage, and the flux collapses.
Please read again, what i said is this: "current just grows in the coil as result of playing with voltage". I didnt said the current "grows by itself", but as a result of "playing with voltage". E.g. voltage being applied. And if you read my entire post, you will see the reply was about uncle saying that stepper driver is making a current sinusoid and forces it into the coil. And in turn i said its the driver "plays with voltage", and hence the current is a result of the *driver* "playing with voltage".
Well, you said a lot of things, some of them contradictory, so perhaps I misunderstood :)
The bit I had issue with is :
What you said
Quote
Current just grows in the coil as result of playing with voltage, and that is the elemental law of the inducutor. Voltage across inductor builds the flux, to which the current is proportional.
Voltage across the inductor generates current, and the current generates the flux. The same is true of any conductor; inductors are designed to enhance the flux.
uncle_bob was correct in what he said, so I couldn't see why you would take issue with it, although you do now seem to be agreeing with what he said.
BTW this is not my wisdom :) It's the physics of how it works and you can read it on wikipedia!