ppt on the Transformer
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This document provides an overview of a training seminar on transformers presented for partial fulfillment of a Bachelor of Technology degree. It discusses the basic principles and components of transformer operation, including mutual induction, core types, windings, and losses. Key points covered include how transformers transfer power between circuits via changing magnetic fields without altering frequency, and how the turns ratio determines the voltage ratio between primary and secondary coils. The document also describes transformer construction, testing procedures, and the core building process used in transformer manufacturing.
ppt on the Transformer
- 1. A Training Seminar On “ Shri Karsna Sudharshan Urja pvt. Ltd.” This training seminar is submitted for partial fulfilment of the degree of Bachler of Technology Submitted to Submitted By Mr. Jitendra Singh Yuvraj Singh (Assistant Professor) 14EGCEE037 GLOBAL COLLEGE OF TECHNOLOGY, JAIPUR
- 2. TRANSFORMER
- 3. TRANSFORMER INTRODUCTION An A.C. device used to change high voltage low current A.C. into low voltage high current A.C. and vice-versa without changing the frequency 1. Transfers electric power from one circuit to another 2. It does so without a change of frequency 3. It accomplishes this by electromagnetic induction 4. Where the two electric circuits are in mutual inductive influence of each other.
- 4. PRINCIPLE OF OPERATION It is based on principle of MUTUAL INDUCTION. According to which an e.m.f. is induced in a coil when current in the neighboring coil changes.
- 5. CONSTRUCTIONAL DETAIL : SHELL TYPE- • Windings are wrapped around the center leg of a laminated core.
- 6. CORE TYPE- • Windings are wrapped around two sides of a laminated square core.
- 7. SECTIONALVIEW OF TRANSFORMERS Note: High voltage conductors are smaller cross section conductors than the low voltage coils
- 8. Fig- Coil and laminations of core type transformer
- 9. Fig: Shell type windings
- 10. TRANSFORMER WITH CONSERVATOR AND BREATHER
- 11. WORKING OF A TRANSFORMER 1. When current in the primary coil changes being alternating in nature, a changing magnetic field is produced 2. This changing magnetic field gets associated with the secondary through the soft iron core 3. Hence magnetic flux linked with the secondary coil changes. 4. Which induces e.m.f. in the secondary.
- 12. SINGLE PHASE TRANSFORMER • SINGLE PHASE TRANSFORMER Two or more winding coupled by a common Magnetic Core
- 13. IDEAL TRANSFORMERS • Zero leakage flux: • Fluxes produced by the primary and secondary currents are confined within the core • The windings have no resistance: • Induced voltages equal applied voltages • The core has infinite permeability • Reluctance of the core is zero • Negligible current is required to establish magnetic flux • Loss-less magnetic core • No hysteresis or eddy currents
- 14. TRANSFORMER EFFICIENCY Transformer efficiency is defined as (applies to motors, generators and transformers): %100×= in out P P η %100× + = lossout out PP P η Types of losses incurred in a transformer: Copper I2 R losses Hysteresis losses Eddy current losses
- 15. VOLTAGE REGULATION voltageload-no voltageload-fullvoltageload-no regulationVoltage − = = 1 2 12 N N VV p s p s N N V V =recall Secondary voltage on no-load V2 is a secondary terminal voltage on full load − = 1 2 1 2 1 2 1 regulationVoltage N N V V N N V Substitute we have
- 16. CORE BUILDING MACHINE NAME-UNICORE • This machine uses iron sheet roll for making the core of the transformer. • Using thickness :-0.23mm-0.27mm • It consists sensors to reduce the tension
- 17. CORES ARE BAKING To reduce tension and to make it hard of further treatment. For 5 hours at 160 degree centigrade.
- 18. CORE ARE READY FOR WINDING • For single phase transformer . • L.VTurns=56 • H.VTurns=1482 • So the turns ratio for this transformer is 26.42 • Turns Ratio=H.VTurns L.VTurns
- 19. MAKING OF OUTER SHELL FOR TRANSFORMER • It is made by the metal sheets which is having the thickness of 20 mm. • It is prepared by using sheet cutting machine and welding machine.
- 20. TRANSFORMER TESTS MeggerTest :-For Insulation testing RatioTest:-ForTurns OF L.V & H.V DVDF:-DoubleVoltage Double Frequency Test No LoadTest/ Open Ckt Test:Iron Loss Short Ckt Test/ LoadTest:-Copper Loss 3KVTest :-For L.V Side (InsulationTest) BreakdownVoltage:-For Oil Test
- 21. THANK YOU