Design of Electrical machines

5-year combined undergraduate / graduate Engineering programs

General Data
Academic program	General Engineering Program			:
Type d'EC	Classes
Lectures : 4h00 Tutorials : 2h00 Lab Work : 12h00 Total duration : 18h00	Status :	Period : SEMESTER 6	Education language : French

Learning Outcomes
Be able to recognize all the electrical machines (direct current machines with magnets or wound stator, synchronous machine with permanent magnets or wound rotor, variable reluctance machine, Induction machine with cage or wound rotor, etc.) according to their constituent specificities (types of stator, rotor, brush-collectors systems, etc.) Know the technical vocabulary to describe all the internal elements of a synchronous machine with magnets or wound rotor. Be aware of the different methods of numerical modeling of magnetostatic systems, in particular their advantages and disadvantages and being able to explain how the finite elements is a good approach to model synchronous electrical machines. Understand an industrial method of dimensional analysis of synchronous machines with permanent magnets to meet industrial specifications

Learning Outcomes

Be able to recognize all the electrical machines (direct current machines with magnets or wound stator, synchronous machine with permanent magnets or wound rotor, variable reluctance machine, Induction machine with cage or wound rotor, etc.) according to their constituent specificities (types of stator, rotor, brush-collectors systems, etc.)
Know the technical vocabulary to describe all the internal elements of a synchronous machine with magnets or wound rotor.
Be aware of the different methods of numerical modeling of magnetostatic systems, in particular their advantages and disadvantages and being able to explain how the finite elements is a good approach to model synchronous electrical machines.
Understand an industrial method of dimensional analysis of synchronous machines with permanent magnets to meet industrial specifications

Content
- Identification games for the different types of machines with a participatory restitution to describe each of the rotating electrical machines. - Description of the technical vocabulary of synchronous electric machines with permanent magnets, using real open and dismantled machines as support. - Reminders of the physical phenomena in place in electrical machines (Maxwell's laws) and details on the numerical calculation methods that can be envisaged in electromagnetism to solve these complex equations. Comparison of numerical calculation methods and justification of the choice of finite elements. - Description of single and double layer winding techniques and their influence on the induction harmonics present in the electrical machine. - Apprehension of the techniques for calculating the winding coefficient via the distribution and shortening coefficient. - Description of the analytical sizing method with the progress of a complete example - Description of the modeling approach: analytical pre-dimensioning with the method seen previously, description of the geometry in MATLAB, piloting of the FEMM4.2 finite element CAD software by MATLAB. - Realization of a 12-hour project on the design of a synchronous machine with permanent magnets based on industrial specifications.

Content

- Identification games for the different types of machines with a participatory restitution to describe each of the rotating electrical machines.
- Description of the technical vocabulary of synchronous electric machines with permanent magnets, using real open and dismantled machines as support.
- Reminders of the physical phenomena in place in electrical machines (Maxwell's laws) and details on the numerical calculation methods that can be envisaged in electromagnetism to solve these complex equations. Comparison of numerical calculation methods and justification of the choice of finite elements.
- Description of single and double layer winding techniques and their influence on the induction harmonics present in the electrical machine.
- Apprehension of the techniques for calculating the winding coefficient via the distribution and shortening coefficient.
- Description of the analytical sizing method with the progress of a complete example
- Description of the modeling approach: analytical pre-dimensioning with the method seen previously, description of the geometry in MATLAB, piloting of the FEMM4.2 finite element CAD software by MATLAB.
- Realization of a 12-hour project on the design of a synchronous machine with permanent magnets based on industrial specifications.

Pre-requisites / co-requisites
Electrical machines (S6) One-phase and three-phase circuits (S5)

Bibliography
Technique de l'ingénieur,Jacques Saint-Michel, Bobinage des machines électriques Techniques de l'ingénieur,B. Allard, F. Costa, F. Mazaleyrat, A. Miraoui, J-C VANIIER, Machines électriques tournantes : conception, construction et commandes

Assessment(s)
N°	Nature	Coefficient	Observable objectives
1	Multiple-choice exam to check the acquirement of the vocabulary and the logic of designing a machine. Check that the wiring methodology is mastered and that the wiring distribution can be calculated by the students.	2	Written exam
2	Develop autonomy of student on machine designing. The aim is to evaluate the appropriation by students of calculation and CAD tools in order to answer to specificactions they have chosen. Are they able to propose a functionnal design in few hours ? (Even if the design contains simple hypothesis) Written report	1	Project