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A DC motor is an electrical motor that uses direct current (DC) to produce mechanical force. The most common types rely on magnetic forces produced by currents in the coils. Nearly all types of DC motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current in part of the motor. DC motors were the first form of motors widely used, as they could be powered from existing direct-current lighting power distribution systems. A DC motor's speed can be controlled over a wide range, using either a variable supply voltage or by changing the strength of current in its field windings. Small DC motors are used in tools, toys, and appliances. The universal motor, a lightweight brushed motor used for portable power tools and appliances can operate on direct current and alternating current. Larger DC motors are currently used in propulsion of electric vehicles, elevator and hoists, and in drives for steel rolling mills. The advent

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Publications associées (15)

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Brushed DC electric motor

A brushed DC electric motor is an internally commutated electric motor designed to be run from a direct current power source and utilizing an electric brush for contact. Brushed motors were the fir

Moteur sans balais

Un moteur sans balais, ou « moteur brushless », ou machine synchrone auto-pilotée à aimants permanents, est une machine électrique de la catégorie des machines synchrones, dont le rotor est constitué

AC motor

An AC motor is an electric motor driven by an alternating current (AC). The AC motor commonly consists of two basic parts, an outside stator having coils supplied with alternating current to produce

Optimization of a BLDC motor using a genetic algorithm

Mathieu Roulet

Nowadays, more and more electrical motors are being used in mobile applications, such as hybrid cars for the automotive sector or even in aeronautics applications. A typical example is the solar impulse airplane which is propelled with four electrical motors powered only with solar cells. This example is for now an exception, but it is very likely it will become more and more common in coming years. The importance of having a light and ecient motor for such applications is obvious. This report presents a way to design optimal electrical motors in terms of minimal mass and maximal eciency. The goal of this project is to test the capability of genetic algorithms to optimize electrical motors.

2010

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Solar Impulse – Thermal simulation of the electronic circuit board

Laurie Saunders

The goal of this semester project is to create a thermal model of a electronic circuit board that will be used to control a Brushless DC motor for the project “Solar Impulse”. For this project, the finite element (FEM) software Ansys is used to build the model and to then apply the thermal loads. The software will calculate the temperature of the circuit board. The modeling using FEM is applied as it is not possible to make an analytical model for a complicated configuration like in this case.

2004

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JOE : A mobile, Inverted Pendulum

Félix Grasser, Alfred Rufer

The Industrial Electronics Laboratory at the Swiss Federal Institute of Technology (EPFL) in Lausanne has built a prototype of a revolutionary two-wheeled vehicle. Due to its configuration with two coaxial wheels, each of which is coupled to a DC Motor, the vehicle is able to do stationary U-turns. A control system, made up of two decoupled state space controllers, pilots the motors so as to keep the system in equilibrium. See http://leiwww.epfl.ch/joe for a video demonstration of JOE.

2001

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EE-361: Electrical machines (for EL)

L'objectif de ce cours est d'acquérir les connaissances de base liées aux machines électriques (conversion électromécanique). Le cours porte sur le circuit magnétique, le transformateur, les machines synchrones, asynchrones, à courant continu et les moteurs pas à pas.

MICRO-314: Actuators and Electromagnetic systems II

Les étudiants seront capables de modéliser, de simuler et de mesurer des actionneurs électromagnétiques et des moteurs électriques.

EE-382: Electrical machines (for ME)