CONSTRUCTION OF STEP UP TRANSFORMER WITH MULTI OUTPUT


CONSTRUCTION OF STEP UP TRANSFORMER WITH MULTI OUTPUT   

ABSTRACT

Transformer is one of the indispensable devices mostly in Electric Power Transmission, Transformer Step-down or Step-up, the output voltage/current to the design requirement. This project was meant to show the necessary step and methods of designing and constructing a typical step-up auto transformer with tapping. In this project, we gathered information from both primary data (personal interview) and secondary data (information from textbook and internet). The project work consist of copper winding which was self-induced the wind has several tapping for secondary voltages. It also consists of Iron Core which was laminated, bolt and nut to hold the Iron Core tight. In this design, am using 1KVA to be 5000w, for any current that come in like input to give 5000w output for a Air-conditioner to used. The winding determine wealthier step-up or step-down, in step-up is to increase voltage rating the primary turn were determine by measuring the length of the primary coil to the calculated length value then number of turns was 396 turns, which was rounded up to 400 turns for ease of calculation of the secondary number of turns, so secondary was calculating transformer ratio. 

CHAPTER ONE1.1  INTRODUCTION

A transformer is a magnetically coupled coil used in the transmission of electric power. This coil may be electrically linked, but not electrically linked as in two winding transformers. It consists of the primary winding and secondary winding which the number of turns varies depending on the type of transformer. Transformers are operated by the principle of mutual inductance between two separate coils wound on the same core. There is also the step–up and step–down transformer. This work looks into the construction of a step–up autotransformer.   the autotransformer is the transformer that consists of only one is winding port of the being common to both primary winding and secondary winding.   That theory of an autotransformer and its operation is similar to that of the two winding transformers, it has high efficiency where cheap (because it used less copper) it is applicable where transformer ratio little differs from unity.I.     STANDARD WIRE GAUGE: These are a specific number of a wine (coil) it is used in this project to gauge on 17 which has a diameter of 1.422m.II.     TRANSFORMER: It is a cutout shape rubber material with a hollow in the center and with a grove around it to avoid electrical links between the core and the coil.III.    VOLTMETER: This is the instrument used to measure the voltage across the circuit. It is connected in parallel to the winding.IV.    INSULATOR: These are the material used to isolate two conductors from touching each other.1.2  PURPOSEThis transformer is a step–up transformer, it helps in stepping up voltage because the primary winding function and the secondary winding function from the voltage rating to the normal rating are to step – up the voltage in the transformer.1.3  OBJECTIVEThis transformer consists of only one winding part of the common to both primary and secondary winding. It had high efficiency and uses less copper, it is applicable where the transformer ratio differs from unity. The primary winding is connected to the power source and the other winding is secondary winding it helps the transformer increase the voltage to the normal voltage rate.1.4 SIGNIFICANCER. Fienberg in “MODERN POWER TRANSFORMER PRACTICE” stated that a transformer has a significant rate that transformer machine in bringing down the voltage rate it’s the desired amount. Transformer initially raises the generated voltage for efficient transmission over long distance and thereafter decrease the system voltage for local destruction and utilization.1.5 LAMINATIONThe transformer comprises ‘E’ and ‘I’ laminated cores which were obtained from a scrub transformer and recycled. the process of recycling involves washing of core with fuel to remove the unwanted grease and then dry up and grease with new oil so as to prevent air gap. it also comprises of the coil which bought fresh one in the market, switches, connector former and insulator to isolate the output and input wires from touching each other.1.6 DEFINITIONS OF TERMSTRANSFORMER: A transformer is a magnetically coupled coil, a transformer rescues input current and sends output voltage, be it step – up or step–down transformer is used in the transmission of electric power.STANDARD WIRE GAUGE: These are a specific number of a wine (coil) it is used in this project to gauge on 17 which has a diagram of 1.422m. TRANSFORMER: It is a cutout shape rubber material with a hollow in the center and with a grove around it to avoid an electric link between the core and the coil. VOLTMETER: This is the instrument used to measure the voltage across the circuit. It is connected in parallel to the winding. INSULATOR: These are the material used to isolate two conductors from touching each other. CASING: The outer cover of the transformer this serve is from external hazard was made of metal as earlier stated in our previous chapter. THE SWITCH: This is mechanical advice used to open and close a complete electric circuit. The multipurpose low voltage (AC) transformers are connected via a switch to the power supply. The primary winding is connected to the power source and the other winding is secondary winding We have a step-up transformer and step–down transformer. But in this context emphasis will be lay on the step–up autotransformer.

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CONSTRUCTION OF STEP UP TRANSFORMER WITH MULTI OUTPUT



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