Transformer with a many turns core

on 29 August 2012.

Emf induced in the coil is proportional to the rate of change of the magnetic flux. In order to increase the coil voltage is applied, that is connected in the circuit.

 One turn of the conductor in a changing magnetic field gives, for example, one volt, two turns - two volts, etc.

 We can go the other way. You can skip twice in one turn of the changing magnetic field can be passed three times, etc. That is, the same field may cross multiple turns of the coil!


Suppose we have dvuhvitkovy magnetic core. At one turn of this core is the primary coil. Two other coil covers the secondary coil.






  Passing an AC current through the primary coil creates a magnetic field. It runs twice through the secondary coil, and on each pass is excited own EMF. There is a small time lag of the first flow from the second (path length divided by the speed of light). But, in my opinion, the value of the lag will get only at great length of the path. In the secondary coil will be double the EMF!

In case of equality of turns in the primary and secondary coils of the second coil voltage is equal to the voltage on the primary coil multiplied by the number of passes. You can get a double, triple, etc. voltage increase.

Seeming awkwardness should not be intimidating. Second lag of the magnetic flux from the first time is negligible. Here is a field initiatives, take a walk, play with the arrival time of the second stream after the first just fun! Moreover, it is only the length of the magnetic core will be here the experimental factor.

Certainly be fixed double, triple, etc. EMF with a coefficient that takes into account the length of the path of the magnetic flux in the magnetic (very, very little from the unit). Unfortunately, the resistance of the magnetic circuit at great length will be greater.

But even with a delay of 1 meter in length of the magnetic flux comes second after 0.3 x 10-8s. Therefore argues in conclusion: if such backlog will be the dual voltage (summarized).

First, copper is expensive, and, perhaps, there will be times when it is (transformers with multi-pass core) would be encouraged to create.

Second, the use of higher frequencies (50 Hz) as a metal-ferromagnet decreases dramatically reduces the size of transformers.

Third, the study of such devices can provide very pleasant discovery.
At the very least, a place in cabinet of curiosities of electrical devices such transformer guaranteed. This email address is being protected from spambots. You need JavaScript enabled to view it.