volts equal more flux?

[Hummina Shadeeba]

With a transformer when stepping up the voltage you add more windings and that converts whatever you had into a ratio with more volts. It's physically the same with a motor when you want more torque and a low Kv as you add more windings.
Does voltage produce more flux?

 

[Punx0r]

No. Magnetic field is equal to current multiplied by number of coil turns (amp-turns).

 

[Hummina Shadeeba]

magnetic field is equal to amps x turns but the turns are effectively turning the amps into volts. If another induction coil was placed beside the first, such as in a transformer, the second would end up with a much higher voltage if the first had many turns. Effectively you have maybe 3000 volts and one amp being emitted even though you put in...10 amps (dont think it matters the voltage just what that amps are pushed by the voltage) and they go through 30 turns.

Since a low kv motor will produce more torque as a similar motor with fewer turns but the same amperage, isn't it fair to say that volts equals torque as it's presented in the air gap between?

 

[major]

The unit of flux is the Weber (Wb). And 1Wb = 1Vs (one Volt second). So the relationship of Flux, Volts and Time (frequency) is useful in transformers.

The air gap torque in the motor is equal to the flux times the armature current (vector product). So actually, it is independent of voltage, or time.

 

[Punx0r]

This pages explains the basics of an electromagnet (like the coils in a motor):

http://www.electronics-tutorials.ws/electromagnetism/electromagnets.html

Here is a simple calculator that tells you the force an electromagnet will generate:

https://www.easycalculation.com/engineering/electrical/solenoid-force.php

I think a transformer is different: It is using a coil not as an electromagnet to create a physical force, but as a source of flux to induce a voltage in another coil (the secondary winding), where rate of change of the field is important, which is increased by higher voltage being switched in the primary...

dont think it matters the voltage just what that amps are pushed by the voltage) and they go through 30 turns.

That is how I think of it - the voltage is only important in that it must be great enough to overcome the resistance of the winding to allow X amps to flow: I = V/R

 

[Hummina Shadeeba]

what happens next..
with a transformer the magnetic field is built and collapses 60hz a second and the time it takes to build up that magnetic field would be longer than the time the polarity is switched right?

 

[major]

No, the time for magnetic fields to change is essentially zero. There will be a lag (offset) for the current due to the field expressed by the inductance and seen as a phase shift or power factor.