Hello, friends, I hope you all are doing great. In today’s tutorial, we will discuss the Difference Between an Autotransformer and a Conventional Transformer. The basic difference between autotransformers is that in autotransformers one winding is used while in conventional transformers 2 different windings are used.
In today’s post we will have a detailed look at both autotransformers and conventional transformers. We will compare them to find their differences. So let’s get started with the Difference Between Autotransformers and Conventional Transformers.
Difference Between Autotransformer and Conventional Transformer
Autotransformer
- The type of transformer that has single windings as compared to another transformer that is more than one winding.
- Single windings is such configured that it has two parts one is used as primary and the other is used as secondary.
- In other transform different windings used is primary and secondary
- It consists of 3 numbers of tapping where connections are created.
- Due usage of single winding its cost of construction is less than other transformers.
- That has a drawback it needs certain insulation between two parts of windings that can cause a short circuit if not exit.
- It also has the benefit of that less value of leakage reactance and less power loss than other
- It can be employed as a voltage regulator at different loads
- The part of windings of this transformer that is mutual among primary and secondary is called the common part and the other is called series.
- the equation used for voltage measuring from the transformer is given here.
- V1/V2=N1/N2
- Its work lies on the phenomenon of self-induction
- It needed less value of initial current due to simple structures
- the value of output voltage can be varied according to load attached demand
Conventional Transformer
- In a conventional transformer, two windings are used the first one operates as the primary, and the second one is used as the secondary winding.
- It works on the phenomena of mutual induction.
- the operation of the transformer is to change the voltage level from one to another.
- If it transforms from high to low called to step down and if transforms from low to high called a step-up transformer
- The operation of a transformer lies on the Faraday law of electromagnetic induction
- Transform used at power generation system called power transformer and transform that used at load end to decrease load called distribution transformer
- As compare to autotransformer its price is high due to its large size.
- Losses occur with a larger quantity than an autotransformer.
- It offed the constant value of the voltage at load.
- the common type of losses in transformers ar eddy current, hysteresis loss
- Its main parts are the core over which windings is wounded.
What is the difference between the two types of transformers?
- Transformer comes with two main types dry type transformer and oil type transformer, according to the cooling system used. Air is used in dry-type transformers and oil type is used oil for cooling systems.
What is the difference between an autotransformer and an isolation transformer?
- The isolation transformer has primary and secondary windings. These windings have insulation for separation. That controls the chances of electrocution in case when an active component is connected to the earth.
Conventional Transformer and Autotransformer
Conventional Transformer
- This transformer normally comes with two winding and has two magnetically connected windings that are separated through electrical insulation.
- Its windings are primary and secondary.
- It works on the mutual inductance principle
- It is larger and uses more conductors due to more than one winding.
- It has high copper losses that reduce its efficiency.
- high leakage flux it as and needed larger excitation current.
- It has constant output voltage and internal impedance is higher.
- It has good voltage regulation.
- Its main uses are in step-up and step-up voltage.
Autotransformer
- It has one winding and one connection taken from that winding work as secondary.
- It also has primary and secondary windings at one winding
- It’s primary and secondary not electrically insulated
- Its working is based on self-inductance.
- The power flow from the input to the output side is magnetic and electrical.
- It is smaller in size than the conventional transformer
- It uses a low conductor for winding and has fewer losses.
- It has low leakage and high efficiency.
- It has low internal impedance.
- It is low-cost and has good voltage regulation.
What is a disadvantage of an auto transformer?
- There is galvanic isolation exists between the input and output sides. It has a high chance of short circuits. Not easy for over-voltage protection. It has safety issues due to the connection of live components.
Why do we use auto transformer instead of a transformer?
- Since it uses fewer windings and a small core size and autotransformer has easier to use and lower cost than two winding transformers.
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So it is a detailed post about the difference between autotransformers and conventional transformer if you have any query ask in comments. Thanks for reading. Have a good day.