Transformers are used to increase or decrease the voltage of alternating currents. A transformer consists of two coils of wire wound on a metal core. An alternating voltage is applied to one coil (the primary coil). This causes a changing (alternating) magnetic field to be set up in the core.
What is transformers and its types?
This transformer acts as a bridge between the power generator and the primary distribution grid. Depending on the Power rating and specification, Power transformers can further be classified into three categories: Small power transformer, Medium Power transformers, and the Large power transformers.
What is transformer and examples?
Example: A step-up transformer works on 220 V and gives 2 A to an external resistor. The turn ratio between the primary and secondary coils is 2:25. Assuming 100% efficiency, find the secondary voltage. Primary current and power delivered.
How will you define transformers?
A transformer is an electrical device that uses the principle of electromagnetic induction to transfer energy from one electric circuit to another. It is designed to either increase or decrease AC voltage between the circuits while maintaining the frequency of the current.
Why are transformers used?
A transformer is an electrical device that changes the voltage of an alternating current (AC) supply, such as the mains electrical supply . A transformer changes a high-voltage supply into a low-voltage one, or vice versa: a transformer that increases the voltage is called a step-up transformer.
Why do transformers only work with AC?
transformer work only on ac supply because A transformer needs an alternating current that will create a changing magnetic field. A changing magnetic field also induces a changing voltage in a coil. This is the basis of how a transformer works: The primary coil is connected to an AC supply.
What are 4 types of transformers?
- Power Transformers. A power transformer transfers electricity between a generator and the distribution primary circuits.
- Autotransformers. Now, let’s make things even more complicated.
- Generator Step-Up Transformers. Moving right along to GSUs or generator step-up transformers.
- Auxiliary Transformers.
What are the 5 applications of transformer?
- Steel Manufacturing.
- Ammeters or Current Transformers.
- Impedance Matching or Impedance Transferring Device.
- Air Conditioner.
- DC Blocker.
- Power Transmission and Distribution Applications.
What is transformer and its applications?
Transformer is the simplest device that is used to transfer electrical energy from one alternating-current circuit to another circuit or multiple circuits, through the process of electromagnetic induction. A transformer works on the principle of electromagnetic induction to step up or step down voltage.
What is the basic principle of transformer?
The transformer works on the principle of Faraday’s law of electromagnetic induction and mutual induction. There are usually two coils primary coil and secondary coil on the transformer core. The core laminations are joined in the form of strips.
What are the three uses of transformer?
Transformers are used to regulate voltage. Transformer mitigates power loss and increases energy efficiency. Transformer prevents DC from passing from one circuit to another. Transformer is used for Impedance Matching.
What is transformer in one word?
transformer. / (trænsˈfɔːmə) / noun. a device that transfers an alternating current from one circuit to one or more other circuits, usually with an increase (step-up transformer) or decrease (step-down transformer) of voltage.
What is a transformer class 12 physics?
Transformer. A Transformer is used to convert low voltage (or high current) to high voltage (or low current) and vice versa. It is based on the principal of electromagnetic induction. One of the coils called the primary coil has Np turns. The other coil is called the secondary coil; it has Ns turns.
What is the name of transformer?
The Autobots (also known as Cybertrons in Japan) are the heroes in the Transformers toyline and related spin-off comics and cartoons. Their main leader is Optimus Prime, but other “Primes” have also commanded the Autobots such as Rodimus Prime. They are constantly at war with the Decepticons.
What devices use transformers?
- Wall transformers (i.e., charging electronic devices)
- Power stations and renewable energy applications.
- Automation and industrial processing controls.
- Lighting systems.
- Small appliances (such as computers, televisions, toasters, microwaves)
Does a transformer convert AC to DC?
A transformer is not designed to convert AC to DC or DC to AC. The transformer can step-up or step -down current. A transformer that increases the voltage from the primary to secondary is called a step-up transformer.
Why DC is not used in transformer?
As mentioned before, transformers do not allow DC input to flow through. This is known as DC isolation. 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.
What type of current is used in a transformer?
Unlike a voltage transformer, the primary current of a current transformer is not dependent of the secondary load current but instead is controlled by an external load. The secondary current is usually rated at a standard 1 Ampere or 5 Amperes for larger primary current ratings.
What are the main parts of a transformer?
There are three basic parts of a transformer: an iron core which serves as a magnetic conductor, a primary winding or coil of wire and. a secondary winding or coil of wire.
What are the classification of transformer?
These are classified as power transformer, protection transformer, measuring transformer and distribution transformer.
Which transformer is used in home?
In distribution networks, the step-down transformer is commonly used to convert the high grid voltage to low voltage that can be used for home appliances.
What is the 3 types of transformer core?
- Single phase core type transformer construction.
- Three phase core type transformer construction.
- Single phase shell type transformers.
- Three phase shell type transformers.
What are the 2 types of transformers?
There are two types of potential transformers; the conventional wound type (or electromagnetic type) and the capacitor voltage (potential) transformer.
What is the most important use of transformer?
One of the major uses of Transformers is for controlling the power of alternating current which helps in increasing efficiency and ultimately lowering the electricity bills.
What are the limitations of transformer?
- Transformer Losses (Heat)
- Copper (or Winding) Losses.
- Iron (or Core) Losses.
- Transformer Temperature Limitations.
- Current Limits.
- Voltage and Frequency Limits.