Does DC produce flux?

3.8. Flux produced by armature current in a d.c. machine. The effective m.m.f. of any winding is the resultant of the m.m.f. set up by each coil carrying a current. A single armature coil may be represented as shown in Fig.

Can DC current produce magnetic flux?

Yes, direct currents (DC) produce magnetic fields. DC is considered a static current that only moves in one direction.

What happens when DC is applied to a coil?

When DC current flows through any coil, it creates its electric & magnetic field. Instead the coil would be like a long piece of wire without much resistance. When the coil is disconnected this magnetic field will collapse. When it collapses a reverse voltage is generated in the coil.

How do DC motors produce flux?

Magnetic flux in DC machine is produced by field coils carrying current. This is called excitation. Field winding is connected in parallel with armature winding.

Does DC induce current?

The reason is that transformers work via induction of electrical forces by changes in magnetic fields, so the constat fields produced by dc currents won’t work at all. Harvesting the current is based on Faraday’s law, which says changes in B will induce currents. Therefore if you apply DC, no current.

Why can’t DC be used in transformers?

As mentioned before, transformers do not allow DC input to flow through. This is because a change in current cannot be generated by DC; meaning that there is no changing magnetic field to induce a voltage across the secondary component.

Can DC be applied to Transformers?

Transformers do not pass direct current (DC), and can be used to take the DC voltage (the constant voltage) out of a signal while keeping the part that changes (the AC voltage).

What happens if you connect DC to AC?

If accidentally AC line touches the DC line connected to the electronic circuit and components, the result may be bad smell smoke, flames or even worse. In case of AC components when DC connected to it, it may not work properly (that’s why a transformer can’t be operated on DC voltage) or even start to smoke and burn.

Which part of DC machine creates the field flux?

In a DC machine, two sources of magnetic fluxes are present; ‘armature flux’ and ‘main field flux’. The effect of armature flux on the main field flux is called “armature reaction”. The armature reaction changes the distribution of the magnetic field, which affects the operation of the machine.