DC Electrical Machines

General Data
Academic program	ECAM LaSalle Mechanical and Electrical Engineering Programme			Module Manager(s) : MANNAH Marc Anthony
EC Type : Lectures	DC Electrical Machines (LIIEEng05EDCElecMach)
Tutorials : 6h00 Lab Work : 4h00 Lectures : 6h00 Individual work : 16h00 Total duration: 32h00	Status	Period Semester 5	Teaching language : English

Learning Outcomes
By the end of this module, students will be able to: 1. Identify the magnetic field principle and rules. 2. Recognize the different type of DC motors and interpret their construction 3. Analyze the DC machine's torque speed characteristic and performance

Content
This course provides engineering students with in-depth knowledge of electrical machines theories. It teaches the students the necessary techniques of solving problems. The concept of magnetic field and the principle of operation of DC machines are covered. Their construction, operation's principles and equivalent models are studied in depth. o Introduction to Machinery Principles: Rotational Notions, The Magnetic Field, Magnetic Circuit, Voltage & Torque Equations, Magnetic Losses o DC Machines Construction : Simplest DC Machine (1 loop), Armature Construction, Commutation in a 4 Loop DC Machine, Lap & Wave Windings, Problems & Solutions in Real DC Machines, Voltage & Torque Equations, Losses in DC Machines o DC Motors: Separately Excited & Shunt (Parallel) DC Motor, Series DC Motor & Compounded DC Motor, DC Motors Starting, DC Motors Applications & Test Procedures, DC Generators

Content

This course provides engineering students with in-depth knowledge of electrical machines theories. It teaches the students the necessary techniques of solving problems. The concept of magnetic field and the principle of operation of DC machines are covered. Their construction, operation's principles and equivalent models are studied in depth.

o Introduction to Machinery Principles: Rotational Notions, The Magnetic Field, Magnetic Circuit, Voltage & Torque Equations, Magnetic Losses
o DC Machines Construction : Simplest DC Machine (1 loop), Armature Construction, Commutation in a 4 Loop DC Machine, Lap & Wave Windings, Problems & Solutions in Real DC Machines, Voltage & Torque Equations, Losses in DC Machines
o DC Motors: Separately Excited & Shunt (Parallel) DC Motor, Series DC Motor & Compounded DC Motor, DC Motors Starting, DC Motors Applications & Test Procedures, DC Generators

Corequis
Prerequisites: - Electrical Networks - Electrostatics and Magnetostatics

Bibliographie
Essential Resources: Chapman, S., (2011), Electric Machinery Fundamentals, 4th Edn., McGraw Hill Recommended Resources: Sen, P., (1996), Principles of Electric Machines and Power Electronics, 2nd Edition, ISBN: [0-471-02295-0], Wiley Sahdev, S., (2018), Electric Machines, Cambridge Press

Assessment(s)
N°	Nature	Coefficient	Observable objectives
1	1. Identify the magnetic field principle and rules. 2. Recognize the different type of DC motors and interpret their construction 3. Analyze the DC machine's torque speed characteristic and performance	0,7	Students will be evaluated on the following abilities (1.5 hour midterm written exam): Understanding the magnetic field and its related calculations Validateing technical skills related to DC motors construction, operation and controlability
2	3. Analyze the DC machine's torque speed characteristic and performance	0,3	Students will be evaluated on the following abilities during one 4-hour experimental session: Demonstrate practical skills in working with DC machines. Test and characterize DC machines. Analyze the effect of load on machine performance. Evaluate the effect of changes in the input voltage and excitation on machine performance. Assessment will be based on both the written laboratory report and the student's ongoing performance during the laboratory session.