Component
École Nationale Supérieure d'Électrotechnique d'Électronique
Objectives
The main objective is to develop expertise in the field of torque, speed and position control strategies for three-phase electric machines operating in their respective contexts (land transport, aeronautics, space, maritime, and industry, etc.). Operation in the four quadrants of the torque-speed plane is explored, with particular emphasis on the design of control laws and associated observers.
Description
Starting from a common foundation, highlighting the basic procedures for modelling electrical machines, the course branches into two equally important areas devoted respectively to synchronous machines and asynchronous machines – induction machines:
Synchronous machines:
Representation of synchronous electrical machines – Model
Equation formulation, assumptions
Three-phase and two-phase representation
Non-sinusoidal machine
Torque ripple (origins)
- Conventional synchronous machine control
Scalar control
Conventional control
- Advanced control of synchronous machines
Improvement of torque quality
De-fluxing of magnet machines
Control without mechanical sensors
Asynchronous induction motor (AIM), direct and inverse models
o Power supply modes for a three-phase squirrel-cage asynchronous motor – specifications
o Modelling of the three-phase AIM, definition of parameters, simplifying assumptions
o Three-phase – two-phase transformations, power conservation vs amplitude conservation
Estimators, Observers – indirect sensors of a cage MAS
o Deterministic estimation/observation of flux
o Stochastic observations – Kalman flux filter
o Rotational speed observations, partial and global methods
Indirect and direct controls of a cage-type ASM
o Linear scalar and vector controls
o Non-linear controls with sliding mode and exact linearisation
Control of a doubly fed asynchronous machine (DFAM)
o Dual vector control – naval propulsion
Rotor control – turbomachinery/pumping
Pre-requisites
Electromagnetic modelling of machines: N7EE03B
Modulation and filtering of voltage inverters: N7EE04D
Synthesis of correctors and control architectures: N7EE05C
State space: N8EE13A
Converter control: N8EE15C
Machine control: N8EE15D
ZOE powertrain project: N8EE1