EE25403 DC Machines and Transformers Laboratory – Semester IV – EEE – R-2025

Subject Code & Name: EE25403 – DC Machines and Transformers Laboratory

Regulation: R-2025

Semester: IV (Fourth Semester)

Branch: B.E. Electrical and Electronics Engineering (EEE)

Credits / L-T-P: 2 Credits | L-T-P: 0-0-4

Course Objectives

• To educate the students about the concept of electromechanical energy conversion system and different types of DC generator and its characteristics.
• To impart knowledge on the principle of operation, starting and speed control methods of DC motor.
• To facilitate the students regarding the working principle of single phase Transformers and various tests involved.
• To make the students to understand the working of auto transformer and three phase transformers.

Full Unit-wise Syllabus

List of Experiments

• Open circuit and load characteristics of a separately excited DC Generator
• Study of starters of DC motors
• Speed control of DC shunt motor
• Load test on DC shunt motor.
• Load test on DC series motor
• Load test of DC compound motor
• Swinburne’s test.
• Hopkinson’s Test.
• Open circuit and short circuit test on single-phase transformer.
• Separation of no-load losses in a single phase transformer.
• Sumpner’s test to determine the temperature rise of transformers
• Connections of multi-phase transformers.
• Scott Connection for Phase Conversion of Transformers

Tasks

• T1: Modeling of electrical machines using differential equations
• T2: Simulation of DC machines and transformers using differential equations.

Course Outcomes (COs)

• CO1: Conduct and analyze tests on DC generators and DC motors, including open-circuit, load, and speed control experiments.
• CO2: Evaluate the performance and efficiency of DC machines using Swinburne’s and Hopkinson’s tests.

Assessment Pattern (Quick Note)

• Weightage: Continuous Assessment 60% | End Semester Examinations 40%
• Internal methodology: Project (30%), Assignment (10%), Practical (30%), Internal Examinations (30%)

Source: Official Anna University – B.E. Electrical and Electronics Engineering R-2025 Syllabus
Last Updated: October 2026