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In Transformers two coils are used for mutual induction (check transformers theory) and so that the magnetic flux generated in primary coil gets transferred to secondary coil we need inductance which is only generated in case of an AC current flowing through a coil (check faraday's law).
DC current has no frequency so no inductance(2*pi*f*L) so no induced emf !
CommentInductance is not 'generated'; it is a natural quantity just like resistance or capacitance and is quite independent of whether the supply is d.c. or a.c. (although it can vary with the quantity of current passing through the circuit). And the equation 2 pi f L is that for inductive reactance, not inductance!
Transformers are a.c. machines, because an varying current is required in order to create a varying magnetic flux around the core of the transformer. When a varying flux links the secondary winding, it induces a voltage into that winding through the process of mutual induction (not 'inductance'!). If d.c. is applied, the resulting flux will be constant and mutual induction will not occur. Furthermore, by applying a d.c. supply to the transformer, you risk the chance of burning out the primary winding, as its resistance is very low compared with its inductive reactance (opposition to a.c.), and the resulting current can be much larger than it's designed to carry.
Transformers CAN work with a.c. providing the current is continously interrupted, which is the principle of operation behind a car's ignition coil.
What else can I help you with?
Does transformer works on DC?
I should think not
Can you use transformer for DC supply?
No. Only Transformer could not be used for DC supply.If yoy need to have DC out put,then rectifier unit required .
Why transformer can not be used in dc supply?
The transformer cannot be used in the DC supply because it keeps on alternating its current, whereas the DC supply current should be constant.
Why doesn't transformer work on a DC supply?
to have transformer action there should be an alternating magnetic flux.but dc supply cannot produce alternating flux.
Why transformer action can take place in DC circuit?
Not clear what your question is. First of all, circuits are not classified as DC and AC. Circuits are what they are, and you can apply either AC or DC to any circuit. However, considering a circuit that was designed only for use with DC applied. Still your question is unclear. What is transformer action? "Transformer Action" happens in a transformer.
What is a flyback inverter?
fly back inverter is such kind of DC-AC inverters which use the flyback transformer for the low dc-high dc stage of the inveter shortly it's DC to AC inverter with flyback transformer inside .
Can a transformer work using dc?
no. because if we use dc source for transformer there will be no production of energy for the secondary side since they are mutually conducted, as the transformer is a static device which can transmite the energy from one circuit to other with out changing the frequency and also there is no movement of the conductors. in order to produce the emf there should be either conductor movement or moving flux so the dc source will produce constant field flux hence there is no production of energy in the secondary side.
Can you use any ho transformer for a ho train set?
As long as the transformer is capable of 12 Volts DC output, you can use any transformer with HO scale equipment.
How do you increase voltage 5v-12v?
AC or DC? AC - use a transformer, DC - forget it - not simple or cheap.
How do you increase voltage 5v 12v?
AC or DC? AC - use a transformer, DC - forget it - not simple or cheap.
What does filter do in a transformer?
A transformer does not use a filter. You may be asking about the use of a filter in a power supply. A power supply uses a filter to change pulsating DC from the rectifier into smooth DC for the circuits that the power supply powers.
What is the conditon to connect a DC supply in primary of transformer?
Dc voltage level should not exceed the current carrying capacity of the winding. since winding resistance is very small. We need to be careful in giving the dc voltage to transformer winding.
