Energy Conversion Systems

This teaching unit consists of several parts, the first of which deals with the power electronics structures required to power an electronic system. The second part will focus on the current or voltage regulation of these structures. A third part will deal with the conversion functions required to control MCC and DC Brushless actuators.

The last section presents actuator topologies for robotics and their implementation. DC motor control and autopilot control of a synchronous motor will illustrate this last section.

Practical work will enable students to observe the principle and implementation of regulated systems for electronics and actuators. This course unit may serve as a basis for M1 project topics.

 

 

The objective of this teaching unit is to provide students with the basic knowledge necessary to understand how a closed-loop energy conversion system works, whether it involves voltage or current regulation in an electronic power supply or the control of an electric actuator.

Students must be able to understand how a non-isolated static converter works by studying its different operating phases. They must know how to draw the various associated diagrams, relationships, and time graphs, and how to determine the correctors associated with a voltage or current control loop in a power converter using documentation and calculation methods.

Students must be familiar with the architectures and specific features of the converters required to control electric actuators.

Students must be familiar with the actuators used in robotic applications or low-power motorization systems.

Students must be able to model DC machines using transfer functions based on their electrical and mechanical equations and their electrical model, and know how to implement cascade control: speed control and internal current control.

Students will learn the principles of autopilot control for brushless DC motors used in low-power applications (model making, drones, electric propulsion).

The practical work will enable students to implement and illustrate the principle of voltage regulation in a DC/DC power supply, the regulation of a magnet MCC, and the autopilot control of a brushless DC motor.

Students must be able to use circuit simulation software or associated block diagrams.

 

Bachelor's degree in electrical engineering or applied physics or science and technology with courses covering the basic principles of power electronics.

Have knowledge of the basic principles of how electrical machines work.

Basic concepts of automation for analog control of a linear system.

 

Continuous assessment teaching unit.

1. Introduction and review of power electronics.
2. DC/DC conversion
3. Voltage regulation of a series chopper. Principle and transfer function
4. Calculations of correction factors for a voltage and current control loop. Applications
5. Converters for controlling DC brush and DC brushless motors. Full bridge structure. DC/AC conversion: Inverter. Control principle.

 

1. Actuators for robotics. Different types of actuators and components. Control architectures. Kinematic chains: definitions.
2. Closed-loop study of an MCC with magnet. Modeling of the conversion chain. Determination of the values of the correctors in a voltage and current control loop.
3. Study of the control of a brushless DC motor. Principle of control of a brushless DC motor: autopilot. Control architecture of a brushless motor.

CM: 24 hours           

Practical work: 6 p.m.