In a transformer, or on general, if a material is easily magnetized it has low reluctance.
It is the current transformer core meant for metering.
It is the one which is used to produce flux in transformer and main field flux in motor or generator. Flux is proportional to the current passed through the coil. Flux is inversely proportional to the reluctance of the medium that the flux passes through. Flux is analogous to current. Reluctance is analogous to resistance. MMF is analogous to voltage. so if there is a coil carrying 5A current and 10 turns it produces 5*10 = 50 Ampere Turns MMF . so as the current increases MMF increases. If reluctance of the medium used is high there will be more flux. Let us take a transformer in that in order to produce EMF in the secondary we have to give flux from the primary for that we need a current in the primary that is called Magnetizing current . Any way if we load the transformer , the transformer primary carries (N2 / N1 ) * I2 current in addition to magnetizing current. Apart from these two currents there will be another current which is responsible for core loss in the transformer. Please note that all these three currents are at different phase angles i.e. they are not in same phase. Medium for the flux in the transformer is core. If it is a iron core reluctance is more , to produce same EMF it will take more magnetizing current. If we use CRGO steel as core reluctance is less. For less magnetizing current itself we get flux for the required EMF in secondary.
Transformer Inductance?
Mutual inductance OR induction refers to two independent coils which are electrically isolated but magnetically coupled through a path of low reluctance .This will cause most of the energy produced in the primary side to transfer to the secondary with minimal losses.That is why transformers which functioning on the principle of mutual induction has efficiency nearly 99%.
If the bed lamps use a low voltage bulb then the type of transformer will be a step down transformer.
hat is meant by Reluctance Torque
to reduce core reluctance..
to avoid the high reluctance. joint are eliminated in the layers (butt joints)
Because aluminium is, in simple terms, 'non-magnetic' and will not support the formation of magnetic flux. 'Soft' ferrousmetals with low reluctance* (i.e. metals such as iron or silicon steel) must be used.[*'reluctance' is equivalent to 'resistance' in an electric circuit]
A transformer core is a low-reluctance magnetic circuit, which ensures that most of the magnetic flux generated by the primary winding links with the secondary winding. Without a core, little of the magnetic flux generated by the primary winding will link with the secondary winding.
Transformers are use to step up and step down the voltage of electricity. In a step up transformer, the voltage coming out is higher than the voltage going in so the output is the high side and the input the low side. In a step down transformer, the output is the low side.
It is the current transformer core meant for metering.
It is the one which is used to produce flux in transformer and main field flux in motor or generator. Flux is proportional to the current passed through the coil. Flux is inversely proportional to the reluctance of the medium that the flux passes through. Flux is analogous to current. Reluctance is analogous to resistance. MMF is analogous to voltage. so if there is a coil carrying 5A current and 10 turns it produces 5*10 = 50 Ampere Turns MMF . so as the current increases MMF increases. If reluctance of the medium used is high there will be more flux. Let us take a transformer in that in order to produce EMF in the secondary we have to give flux from the primary for that we need a current in the primary that is called Magnetizing current . Any way if we load the transformer , the transformer primary carries (N2 / N1 ) * I2 current in addition to magnetizing current. Apart from these two currents there will be another current which is responsible for core loss in the transformer. Please note that all these three currents are at different phase angles i.e. they are not in same phase. Medium for the flux in the transformer is core. If it is a iron core reluctance is more , to produce same EMF it will take more magnetizing current. If we use CRGO steel as core reluctance is less. For less magnetizing current itself we get flux for the required EMF in secondary.
U doht
Transformer Inductance?
ideal transformer is that which has no power losses.if any transformer transfer power to secondary without power loss then that call a ideal transformer
Mutual inductance OR induction refers to two independent coils which are electrically isolated but magnetically coupled through a path of low reluctance .This will cause most of the energy produced in the primary side to transfer to the secondary with minimal losses.That is why transformers which functioning on the principle of mutual induction has efficiency nearly 99%.