because the core must be magnetic in order to induce a current
The role of an iron core in a transformer is to allow the maximum flow of flux between the primary and secondary windings so that a voltage can be induced in the secondary at a frequency which is the same as in the primary.
A transformer's core is manufactured from laminations of silicon iron, although it is generally referred to as silicon 'steel'. Silicon iron is used because it offers low hysteresis losses and has a relatively high resistance. The laminations, which are insulated from each other with a light layer of insulation (in some cases, just oxide) offers a low cross-sectional area to the passage of eddy currents that are induced into the core. So, it is the combination of laminations and high resistance that limits eddy current losses.
A silicon iron alloy is used to manufacture Transformers, although it is generally (but inaccurately) termed 'silicon steel' or 'transformer steel'. Silicon steel is used because it has very low hysteresis losses (losses that occur during magnetisation and demagnetisation), and a very low reluctance (the opposition to the formation of magnetic flux). It also has a relatively-high resistivity, which reduces eddy-current losses.
1. provide a frame to fix the primary and secondary coil in place. 2.allow magnetic flux to flow across. 3.acts as temporary ferromagnet which amplifies magnitude of flux.
The purpose is to enhance the magnetic field - to make it stronger - compared to just using air.
yes core is usefull in transformer since it it increase the permeability for the flux (i..e,it offers less relucyance path thanj air ).Their by decresing the losses in the transformer.
To reduce heat generated and eddy current losses in transformer's core during operation.
its efficiency will decresed.
The changing magnetic flux in the iron core of the transformer induces a voltage in the windings.
No. the primary winding is called the primary; the secondary winding is called the secondary. These are both wrapped around the iron core of the transformer. The core helps magnetically link the primary and secondary, which causes the transformation of voltage and current from primary to secondary.
A 'core type' transformer core is one in which the primary windings and secondary windings are placed around each of the limbs, as opposed to a 'shell type' core, in which the two windings are placed across the centre core. A core-type core is a magnetic circuit equivalent to an electric series circuit, whereas a shell-type core is equivalent to an electric parallel circuit. This is better answered with a diagram, so I suggest that you do a search on the internet.
500w iron core transformer .that kind of size
To reduce heat generated and eddy current losses in transformer's core during operation.
its efficiency will decresed.
A: As current flow in the primary it will magnetize the core of the iron in the transformer that is called magnetizing.
The changing magnetic flux in the iron core of the transformer induces a voltage in the windings.
shell type core can be used
A core in the electrical trade usually refers to the iron laminations that coils of wire are wrapped around. The core directs the magnetic field, that the coils of wire produce when energized, into a working force. This could be the iron core of a relay or a transformer core that is the centre and principle reason that a transformer can operate.
No. the primary winding is called the primary; the secondary winding is called the secondary. These are both wrapped around the iron core of the transformer. The core helps magnetically link the primary and secondary, which causes the transformation of voltage and current from primary to secondary.
A 'core type' transformer core is one in which the primary windings and secondary windings are placed around each of the limbs, as opposed to a 'shell type' core, in which the two windings are placed across the centre core. A core-type core is a magnetic circuit equivalent to an electric series circuit, whereas a shell-type core is equivalent to an electric parallel circuit. This is better answered with a diagram, so I suggest that you do a search on the internet.
by using an iron core
It is the number of turns of copper wire on one side of an iron transformer core to the number of turns on the opposite side of the same iron transformer core. eg. 100 turns on the primary to 25 turns on the secondary is the ratio of 4:1
The core is responsible for the hysteresis losses in a transformer. These are the losses associated with the ease, or otherwise, by which the core is able to become magnetised in one direction, demagnetise and, then, remagnetise in the opposite direction. These days, the type of material used (variations on silicon steel) are about as efficient as possible.