JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Prerequisites

Electrical Machines- I

Course Objectives:

• To expose the students to the operation of DC Generators.
• To know the operation of various types of DC Motors.
• To examine the performance of Single and Three Phase Transformers.

Course Outcomes

After learning the contents of this paper the student must be able to

• Start and control the Different DC Machines.
• Assess the performance of different machines using different testing methods
• Evaluate the performance of different Transformers using different testing methods

Course Objectives Program Outcomes

PO1 PO2 PO3 PO4 PO5 PO6 PO7 PO8 PO9 PO10 PO11 PO12 To expose the 3 3 3 3 3 3 1 1 2 2 1 3 students to the operation of DC Generators To know the 3 2 3 2 3 3 2 2 2 3 2 3 operation of various types of DC Motors. To examine the 3 2 3 1 3 3 1 1 2 2 2 3 performance of Single and Three Phase Transformers

Course Outcomes Program Outcomes

PO1 PO2 PO3 PO4 PO5 PO6 PO7 PO8 PO9 PO10 PO11 PO12 Start and control the 3 3 3 3 3 3 3 1 2 1 1 2 Different DC Machines Assess the 3 3 3 3 3 3 3 3 3 3 2 3 performance of different machines using different testing methods Evaluate the 3 2 2 2 3 3 3 2 1 3 3 2 performance of different Transformers using different testing methods

The following experiments are required to be conducted compulsory experiments:

• 1. Magnetization characteristics of DC shunt generator (Determination of critical field resistance and critical speed)
• 2. Load test on DC shunt generator (Determination of characteristics)
• 3. Load test on DC series generator (Determination of characteristics)
• 4. Hopkinson’s test on DC shunt machines (Predetermination of efficiency)
• 5. Swinburne’s test and speed control of DC shunt motor (Predetermination of efficiencies)
• 6. Brake test on DC compound motor (Determination of performance curves)
• 7. OC and SC Test on Single Phase Transformer
• 8. Three Phase Transformer: Verification of Relationship between Voltages and Currents (Star- Delta, Delta- Delta, Delta-star, Star-Star) In addition to the above eight experiments, at least any two of the experiments from the following list are required to be conducted:
• 1. Brake test on DC shunt motor (Determination of performance curves)
• 2. Load test on DC compound generator (Determination of characteristics.
• 3. Fields test on DC series machines (Determination of efficiency)
• 4. Retardation test on DC shunt motor (Determination of losses at rated speed)
• 5. Separation of losses in DC shunt motor.
• 6. Measurement of Voltage, Current and Real Power in primary and Secondary Circuits of a Single-Phase Transformer
• 7. Load Test on Single Phase Transformer (Calculate Efficiency and Regulation)

TEXT BOOKS:

• 1. P. S. Bimbhra, “Electrical Machinery”, Khanna Publishers, 2011.
• 2. I.J. Nagrath and D. P. Kothari, “Electric Machines”, McGraw Hill Education, 2010.

REFERENCE BOOKS:

• 1. Prithwiraj Purkait, Indrayudh Bandyopadhyay, “Electrical Machines”, Oxford, 2017.
• 2. M. G. Say, “Performance and design of AC machines”, CBS Publishers, 2002.
• 3. A. E. Fitzgerald and C. Kingsley, "Electric Machinery”, New York, McGraw Hill Education, 2013.
• 4. A. E. Clayton and N. N. Hancock, “Performance and design of DC machines”, CBS Publishers, 2004.