Maximum Power Transfer Theorem in AC Circuits
OBJECTIVE:
To study the relationship between voltage, current and power in three-phase circuits and examine
STAR and Delta connections.
INTRODUCTION:
three-phase circuits in proper working order tend to be symmetrical, consisting of three identical
branches, each with the same impedance, voltage and current. Each of the branches can be treated as a
single-phase circuit, and thus the analysis of a three-phase circuit is not necessarily any more difficult
than the corresponding single-phase network. Unbalanced three-phase networks usually represent a
problematic condition, such as a fault, and can be much more difficult to analyze. Unbalanced conditions
are beyond the scope of this laboratory exercise.
Three-phase systems are normally configured in either a WYE or DELTA. The names result from the
physical similarity of the wye connection to the letter Y and the delta connection to the Greek letter of the
same name (a triangular symbol). Each of these configurations has unique electrical characteristics
EQUIPMENT AND MATERIALS:
1-Transformer Trainer
2-Digital Function Generator
3- Digital Oscilloscope with Probes.
4-Digital LCR Meter
5-Digital Multi-meter
6-Bread Board
Types of Configurations:
The connections have been made onto LT spice along with their respective results shown. From the
outputs, we see that the relationship of line and of both voltages and currents are verified.
Delta-Delta CONNECTION:
