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SINGLE PHASE TRANSFORMER
Presented by –• MD ABDULLAH AL MAYIN • MD SHARIQUL ISLAM • MD HASNAT HOSSAIN
Presented to:MD MAHMUDUR RAHMANAsst. ProfessorElectrical & Electronics EngineeringDaffodil International University
CONTENTS• What is 1φ Transformer ??• Principle Of Operation
• Working process• Types of Transformer
• Losses In Transformers….• Auto Transformer• Testing………• Applications…
What is 1φ Transformer ??
Principle Of Operation
• Transformer works on the principle of mutual induction of two coils. When current in the primary coil is changed the flux linked to the secondary coil also changes. Consequently an EMF is induced in the secondary coil.
Induction lawFaraday’s law states that: Vs=Ns.dΦ/dt
Working….
Types of Transformer
Mainly Two Types:
• Core Type Transformer• Shell Type Transformer
Another Two types:• Step UP Transformer
•Step DOWN Transformer
Core & Shell type Transformer
Step Up Transformer
Step Down Transformer
Losses In Transformers…. Iron or core Losses – These are the hysteresis loss and eddy current loss.
Copper Loss :Current flowing through the windings then occur some losses.
AUTO-TRANSFORMERS
Autotransformer is a one winding transformer in which a part of the winding is common to both HV & LV sides.
Testing………•Open circuit test
• Short circuit test
Applications… POWER TRANSMISSION : A major application of
transformers is to increase voltage before transmitting electrical energy over long distances through wires. Wires have resistance and so dissipate electrical energy at a rate proportional to the square of the current through the wire. By transforming electrical power to a high-voltage form for transmission and back again afterward, transformers enable economical transmission of power over long distances .
IN ELECTRONICS : Transformers are also used extensively in electronic products to step down the supply voltage to a level suitable for the low voltage circuits they contain. The transformer also electrically isolates the end user from contact with the supply voltage .