Electrical machines

General Data
Academic program	General Engineering Program			:
Type d'EC	Classes (LIIAem06EMachElec)
Lectures : 16h00 Tutorials : 4h00 Lab Work : 8h00 Total duration : 43h00	Status :	Period : SEMESTER 6	Education language : French

Learning Outcomes
1- Identify the physical principles in place in electrical machines (law of electromagnetism, Laplace force, etc.) 2- Describe the constitution of rotating electrical machines: Direct Current Machines, Synchronous Machine, Induction Machine (mechanical parts, name of electrical windings, specific vocabulary) 3- Determine the technical characteristics and the limits of use of the 3 rotating electrical machines mentioned above (torque-speed characteristics, typical efficiency, operating points, operation as a generator) 4- Design and use the circuit model of the 3 rotating machines mentioned above and know how to use them to calculate the operating points and determine the energy efficiency. 5- Give examples of applications of each family: lifting, energy production, mobility….

Learning Outcomes

1- Identify the physical principles in place in electrical machines (law of electromagnetism, Laplace force, etc.)
2- Describe the constitution of rotating electrical machines: Direct Current Machines, Synchronous Machine, Induction Machine (mechanical parts, name of electrical windings, specific vocabulary)
3- Determine the technical characteristics and the limits of use of the 3 rotating electrical machines mentioned above (torque-speed characteristics, typical efficiency, operating points, operation as a generator)
4- Design and use the circuit model of the 3 rotating machines mentioned above and know how to use them to calculate the operating points and determine the energy efficiency.
5- Give examples of applications of each family: lifting, energy production, mobility….

Content
Lectures : - L1 : Introduction to rotating machines: definition of an electromechanical converter, illustration, general description of machines, reminder of electromagnetic laws (Laplace, Lenz-Faraday) demonstration of the creation of an electromotive force and a torque in a simplified structure. - L2 : The direct current machine: description, particularity of design of the electrical contacts by brush-collectors. Reversibility of the machine. Separate excitation, shunt and series modes: description of the circuit model and plot of torque and speed characteristics as a function of armature voltage and current. L3 : Rotating field (Ferrarris theorem demonstration) - L4 : The synchronous machine: description, comparison of a wound rotor machine with permanent magnets. Demonstration of obtaining the circuit model. Description of different models of the synchrone machine: linear, Behn-Eschenburg and Potier. Implementation of synchronous machines: connection to the network. - L5 : The Induction machine: description, Demonstration of obtaining the circuit model. Plot of the torque-slip and speed torque characteristic. -L6 : Openness to the use of electric machines in energy production. Conference on the adequacy of primary energy - type of turbine - type of electrical machine Tutorials : - Study of direct current and asynchronous motors in railway traction, the case of TGV - Comparison of linear and Behn-Eschenburg models for the calculation of an operating point of a synchronous alternator. Practical work: - Coupled system of a DC motor and a synchronous alternator - Study of the MAS characteristics

Content

Lectures :
- L1 : Introduction to rotating machines: definition of an electromechanical converter, illustration, general description of machines, reminder of electromagnetic laws (Laplace, Lenz-Faraday) demonstration of the creation of an electromotive force and a torque in a simplified structure.
- L2 : The direct current machine: description, particularity of design of the electrical contacts by brush-collectors. Reversibility of the machine. Separate excitation, shunt and series modes: description of the circuit model and plot of torque and speed characteristics as a function of armature voltage and current.
L3 : Rotating field (Ferrarris theorem demonstration)
- L4 : The synchronous machine: description, comparison of a wound rotor machine with permanent magnets. Demonstration of obtaining the circuit model. Description of different models of the synchrone machine: linear, Behn-Eschenburg and Potier. Implementation of synchronous machines: connection to the network.
- L5 : The Induction machine: description, Demonstration of obtaining the circuit model. Plot of the torque-slip and speed torque characteristic.
-L6 : Openness to the use of electric machines in energy production. Conference on the adequacy of primary energy - type of turbine - type of electrical machine

Tutorials :
- Study of direct current and asynchronous motors in railway traction, the case of TGV
- Comparison of linear and Behn-Eschenburg models for the calculation of an operating point of a synchronous alternator.

Practical work:
- Coupled system of a DC motor and a synchronous alternator
- Study of the MAS characteristics

Pre-requisites / co-requisites
Pre-requisites : - Single phase and three phase systems

Bibliography
Recommended ressources : Théodore Wildi, & Sybille, G. (2005). Électrotechnique. De Boeck Supérieur. Chatelain, J. (1989). Machines électriques. PPUR Presses polytechniques.

Assessment(s)
N°	Nature	Coefficient	Observable objectives
1	In two hours, the student will : - Answer knowledge questions (technical vocabulary to define or physical phenomena to explain) - Realize 2 or 3 exercices to calculate electrical model parameters or establish operating point for DC or AC machines.	0,667	All
2	- Wire and handle on: Asynchronous motor coupled with another mechanical electric machine DC machine coupled to another electrical mechanical system (Synchronous machine or DC generator) - Conduct experimental surveys by using measuring devices and plot the characteristic curves - Identify equivalent models - Check the area of validity of the proposed models	0,333	1, 2, 3 and 5