Based on the voltage level, the transformer is of three types. Step-up transformer. Step-down transformer. Isolation transformer.
What is a transformer in physics?
A transformer is a device that transfers electric energy from one alternating-current circuit to one or more other circuits, either increasing (stepping up) or reducing (stepping down) the voltage.
What is the working principle of transformer Class 12?
Transformer works on Faraday’s law of mutual induction. Faraday’s law of electromagnetic induction states that, when a change takes place in the magnetic flux which is linked with a circuit, an electromotive force current will induce in the circuit.
What are the 3 types of transformers?
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 its principle?
An electrical device that can change the A.C. current is known as a transformer. Principle – A transformer works on the principle of mutual induction. Mutual induction is the phenomenon by which when the amount of magnetic flux linked with a coil changes, an E.M.F. is induced in the neighboring coil. Construction –
What is the function of transformer?
Transformers are used in electric circuits to change the voltage of electricity flowing in the circuit. It is used to increase the voltage (called ‘stepping up’) or decrease the voltage (‘stepping down’) in AC circuits. Q. A transformer is designed to convert an AC voltage of 220 V to an AC voltage of 12 V.
What are the applications of transformer?
Transformer are used for a wide range of purposes, including increasing the voltage from electric generators to enable long-distance transmission of electricity and decreasing the voltage of conventional power circuits to run low-voltage devices like doorbells and toy electric trains.
What are the two main 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 is the name of transformer?
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What is transformer explain?
A transformer is a passive component that transfers electrical energy from one electrical circuit to another circuit, or multiple circuits.
What is transformer oil name?
Mineral oil and Synthetic oil are the majorly used transformer oil. These are the petroleum products, like Naphthenic based transformer oil and Paraffinic based transformer oil. Naphthenic based transformer oils are known for their heat distribution, which is one of the main problems with transformer.
What is main part of 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 is the EMF equation of transformer?
(Volts). Therefore, RMS value of emf per turn = Form factor X average emf per turn. Therefore, RMS value of emf per turn = 1.11 x 4f Φm = 4.44f Φm. This is called the emf equation of transformer, which shows, emf / number of turns is same for both primary and secondary winding.
What are the classification of transformer?
These are classified as power transformer, protection transformer, measuring transformer and distribution transformer.
What is a unit transformer?
Unit Transformer means the transformers through which the generated voltage is transformed to grid voltage (132 kV) used for evacuation of power to the national grid.
Why kVA rating is used in transformer?
The first reason is the power loss in the transformer. Thus, the total losses in a transformer depend upon volt-ampere (VA) only and not on the power factor of the load. That is why the transformer rating is given in kVA and not in kW.
What are the basic characteristics of a transformer?
- Transformer: –
- Characteristics of a transformer: –
- Constant Period. A transformer operates at a steady frequency. Both the input voltage and the output voltage have the same frequency.
- Varying Voltage. A transformer’s input and output voltages are adjustable.
- Changing Current.
- Continuous Power.
What is current ratio in transformer?
Definition: 1) The ratio of primary amps divided by secondary amps. 2) The current ratio provided by the windings of the CT. For example, a CT that is rated to carry 200 Amps in the primary and 5 Amps in the secondary, would have a CT ratio of 200 to 5 or 40:1.
What is the ratio of transformer?
The turns ratio of a transformer is defined as the number of turns on its secondary divided by the number of turns on its primary.
What is voltage per turn?
Volts per turn (V/turn) is the voltage dropped across each turn of a coil or the voltage induced into each turn of the secondary coil. Each transformer has a design value for the volts per turn. For example, if a transformer primary has 120 turns with a source of 120 V, it has 1 V/turn.
Does a transformer convert AC to DC?
Complete answer: A transformer cannot convert AC to DC or DC to AC. The transformer has the ability to step up or decrease current. A step-up transformer is a transformer that raises the voltage from the primary to the secondary.
Do transformers work with AC or DC?
A transformer is an electrical device that uses electromagnetic induction to pass an alternating current (AC) signal from one electric circuit to another, often changing (or “transforming”) the voltage and electric current.
What is an DC transformer?
A DC-DC converter is a type of DC power supply that utilizes DC voltage as an input. The main function of DC-DC converters is to generate regulated output voltage for electric and electronic applications. Unlike AC, DC cannot be changed from one voltage level to another (step up or step down) using a transformer.
What is the advantage of transformer?
Advantages of transformer : It is efficient for high-frequency range. The available power cannot change but will slightly too much decrease depending on the efficiency of the transformer. It has the advantage of preventing condensed flux leakage as well as iron loss. It offers good mechanical strength.
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.