Introduction Transformer is the main reason to transmit and distribute power in AC Transformer is a device which works on the principle of mutual induction Principle of operation It is based on principle of ID: 1031061
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1. Lecture on TransformerBy D. M. Parshuramkar
2. IntroductionTransformer is the main reason to transmit and distribute power in AC. Transformer is a device which works on the principle of mutual induction.
3. Principle of operationIt 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.
4. Principle of transformer is it convert high voltage (low current) into low voltage (high current). In ideal transformer, input power is equal to out power. In transformer the relation between EMF and current is inversely proportional and EMF and number of turns is directly proportional to each other. The ratio of Es/Ep= Ns/Np is called turns ratio or transformer ratio. Then there are two types of transformer, step-up and step-down transformer. Transformer is the main reason to transmit and distribute power in AC.
5. The ratio is called as turn ratio or transformer ratio.In idea transformer I/P power = O/P Power
6. Put this values in equation III, we get
7. ApplicationsThere are wide applications of transformers such as, step up (increases) or Step down (Decreases) the level of voltage in other words increases or decreases the level of current, while power almost be same, Welding MachineX-ray tubemobile chargingTo transform electric current through metallic cables
8. ApplicationsIt can increases or decreases the value of L, C or R in an AC circuit. This can act as impedance transferring device It can isolate two circuit electricallyTo prevent DC from passing from one circuit to the otherStep-down level of voltage at single phase 11KV to 220 V, Three phase 11KV to 440 V
9. ApplicationsThe current transformer Np/Ns and Potential transformer Ns/Np are used in industry and power systemIt used for impedance matchingImpedance transformer ratio=(Ns/Np)2
10. Power Losses In TransformerIron lossesCopper lossesEddy current lossesHysteresis lossesHeat losses I2R
11. Transformer EfficiencyTransformer efficiency is given as:
12. Thank You