Design And Construction Of 2kva Inverter

CHAPTER FOUR
4.0 TESTING, DESIGN AND DISCUSSION
4.1.1 TRANSFORMATION STAGE
This is the stage where alternating voltage from transistor bank is set up from 12volts DC to 220volts AC to power any electric device using AC power supply. Thus, the 12volts D.C from battery which has been inverting to 12volts pulsating signal is now transformed to a higher AC voltage of 220volts rating.
The rating of transformer is 2000VA of 220V with a constant frequency of 50Hz, in the construction and design of a transformer, the following values were assumed.
Primary voltage     =  12volts
Secondary voltage     = 220volts
Frequency         = 50Hz
Power rating         = 2000VA
Turn ration V1/V2    = 12/220
4.1.2 TRANSFORMER DESIGN  
In this chapter the different stages we followed in the design and construction of the step-up/step-down transformer that was used for this project, the following value were assumed for the purpose of this project.
“The specific magnetic loading “C”    = 0.55wb/m2     
    Power rating                         = 2000VA
    Current density for copper         = 257Am2
Primary voltage                 = 12volts
Secondary voltage                 = 220volt
Frequency                     = 50Hz
Flux density [Bm]                =0.46T
Primary winding                =?
Secondary winding                =?
TRANSFORMATION STAGE CALCULATION
V1= Primary Voltage Vp [12 volt]
V2= Secondary Voltage Vs [220 volt]
    Power Rating = 2000VA
    Frequency “F” = 50H3
    Current density of copper = 257A¬2m
    The specific load rating “C” = 0.55wb/m2
    Voltage per turn [V/T] = C X √S [VA]
DETERMINATION OF NUMBER OF VOLTAGE PER TURN
    Voltage per turns = C √S
    Where S = power rating at the transformer
         C = specific magnetic flux
         Assumed Voltage per turns = C √S
         = 0.55 X √2
               = 0.78volts per turns
DETERMINATION OF CORE AREA
L = 2.4cm
B = 2.5cm
A.C = L X B
       = 2.4 X 2.5
A.C = 6cm