A transformer or generator works by changing magnetism into electricity when a magnet is turned on and off. You can move the magnets or you can create a break in the wire or use a switch or you can use alternating current. You need a way to turn the magnet on and off to change magnetic lines of force into electricity. So, to make your DC source work with your transformer, you must have a way to turn it on and off. Automobiles use a transistor to make the DC current from the Battery turn on and off so they can run it through a coil and have high voltage through the spark plugs.
Transformers operate on the inductance principle; they need a changing magnetic field to induce a voltage into the secondary winding. Either you must supply a changing magnetic field to one winding, or supply that winding with DC and move the core (like in a microphone).
Transformers only work on a.c. This is because it's necessary to have a changing primary current in order to induce a voltage into the secondary winding.If you connect a battery across a transformer, it will not work. Furthermore, if the voltage of the battery matches that of the rated primary voltage, the resulting very large d.c. current is likely to overheat the primary windings and even burn it out.
A step up transformer takes a specific input voltage on the primary coil and induces a specific higher voltage on the secondary coil, hence the name step-up. The secondary voltage is determined by the ratio of turns on the secondary to primary coils respectively. For example, a transformer with 100 turns on the primary and 1000 turns on the secondary will produce a secondary voltage that is 10 times the primary voltage. For a more in depth explanation of how transformers actually induce voltage on the secondary coil, see the link below. You will most likely see a 'step-up' transformer on neon signs. The next time you're at a restaurant or bar, look at their neon sign. You'll see a black box (4" x 4" x 6"w) connected to the sign (usually). This is the transformer, and it takes 120 volts AC and steps it up to 7500 to 10,000 volts AC. This excites the neon gas and causes it to glow. A step-up transformer transforms voltage to a higher level. Like 120 volts to 277 volts. It is type of transformer which is used to step up the voltage from low to high value in order to make it applicable for high rated appliances. Not only for high rated appliances but also for transmission in power distribution systems. It is critical in this role. Power distribution systems depend heavily on step-up transformers to generate the high voltages needed for more efficient long-distance power distribution. (And yes, there are step-down transformers at the other end to make the voltages more "user friendly" and less dangerous.)
Auxiliary transformer- current transformer The current transformer is working based on two theories. 1.Ampheres law. 2.Faradays law. Amp.law- whenever a current flows through the conductor it will produce magnetic flux around the conductor. based on above principle- current flows through the primary will induce a magnetic flux in the CT core. Faraday law- whenever a conductor cuts the magnetic flux or magnetic flux cuts the conductor will induce a emf across the conductor based on above principle- the magnetic flux in the core will cuts the windings. so emf is induced across the secondary terminals . whenever the secondary terminals connected with burden will make a closed path and current flows through the secondary to burden.
when an alternating current apply on primary side of transformer then magnetic flux produced in the iron core of transformer.Then flux link with secondary winding of transformer so that an emf produced in a transformer.
A magnetic field can induce an electrical current in a wire.
No, the current has to change for a voltage to be induced in the transformer.
A: Believe it or not that what a transformer does
No. A constant DC current of sufficient magnitude induces smoke in a transformer.
Eddy current loss in Transformers is because of the eddy currents formed in the body of the magnetic core.Whenever a conductor(iron core) exposed to a changing magnetic field a magnetc field produced in the body of the magnetic core.That induce a circulating current in it.Which is called eddy current.In the case transformer it is loss.But it is useful in other purposes.
A transformer uses a varying magnetic field to induce a voltage in another winding, often changing the voltage to match the requirements of the load.A motor uses a varying magnetic field in induce a torque in the armature, making it turn, converting electrical energy into mechanical energy. In the case of an induction motor, the "windings" in the armature are built in as "single turn shorted secondary windings", rather than windings connected via slip rings or commutators, but the end result is the same - opposing and attracting magnetic fields cause the armature to rotate.
An electrical current.
Transformers operate on the inductance principle; they need a changing magnetic field to induce a voltage into the secondary winding. Either you must supply a changing magnetic field to one winding, or supply that winding with DC and move the core (like in a microphone).
In order to induce voltage as an output, a changing magnetic field is needed. To create a changing magnetic field in the transformer a changing current and that is an alternating current.
When the secondary of a transformer is opened, there is no longer any load on the transformer. There will be some current flowing in the primary winding, which is needed to induce the voltage in the secondary. This primary current is referred to as the "no load" current, and is indicative of the core losses in the transformer.
Transformers only work on a.c. This is because it's necessary to have a changing primary current in order to induce a voltage into the secondary winding.If you connect a battery across a transformer, it will not work. Furthermore, if the voltage of the battery matches that of the rated primary voltage, the resulting very large d.c. current is likely to overheat the primary windings and even burn it out.
A step up transformer takes a specific input voltage on the primary coil and induces a specific higher voltage on the secondary coil, hence the name step-up. The secondary voltage is determined by the ratio of turns on the secondary to primary coils respectively. For example, a transformer with 100 turns on the primary and 1000 turns on the secondary will produce a secondary voltage that is 10 times the primary voltage. For a more in depth explanation of how transformers actually induce voltage on the secondary coil, see the link below. You will most likely see a 'step-up' transformer on neon signs. The next time you're at a restaurant or bar, look at their neon sign. You'll see a black box (4" x 4" x 6"w) connected to the sign (usually). This is the transformer, and it takes 120 volts AC and steps it up to 7500 to 10,000 volts AC. This excites the neon gas and causes it to glow. A step-up transformer transforms voltage to a higher level. Like 120 volts to 277 volts. It is type of transformer which is used to step up the voltage from low to high value in order to make it applicable for high rated appliances. Not only for high rated appliances but also for transmission in power distribution systems. It is critical in this role. Power distribution systems depend heavily on step-up transformers to generate the high voltages needed for more efficient long-distance power distribution. (And yes, there are step-down transformers at the other end to make the voltages more "user friendly" and less dangerous.)