Conception d'un moteur à aimants sans encoches à alimentation unipolaire PDF Download
Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Conception d'un moteur à aimants sans encoches à alimentation unipolaire PDF full book. Access full book title Conception d'un moteur à aimants sans encoches à alimentation unipolaire by Marcel Giguère. Download full books in PDF and EPUB format.
Author: Marcel Giguère
Publisher:
ISBN:
Category :
Languages : fr
Pages : 170
Get Book Here
Book Description
Author: Marcel Giguère
Publisher:
ISBN:
Category :
Languages : fr
Pages : 170
Get Book Here
Book Description
Author: Li Kong
Publisher:
ISBN:
Category :
Languages : en
Pages : 213
Get Book Here
Book Description
The subject of this dissertation is the study of a pennanent magnet brushless motor and its feed.ing inverter in the application of an electric vehicle. The different systems of electric vehicles are reviewed in the first chapter. The solution retained is an in-wheel brushless motor with pennanent magnet NdFeB. The points focused in designing a brushless motor concem the minimisation of the harmonics and the temperature influences on the magnetic characteristics of the magnet NdFeB and, therefore, on the motor. In chapter 2, the magnets are divided in some blocks and are shifted up each other along the motor axis. Based on the static torque curve, the real dimensions of the magnets and the slots and the saturation effect have been taken into account in our study. In regular shifting, the best total shifting angle does not correspond to a tooth step. The irregular shifting is approved particularly efficient even in the case of3 magnet blocks. In the third chapter, the entire B(H) curves of NdFeB is described, for all temperatures, by means of the double variables Chebychev polynomial series. These expressions are integrated in the package Flux-Expert for determining the magnetic field of the machine (in 2D) by finite elements method. This motor is especially sensible to the temperature and the armature reaction does not change greatly the working point of magnet. The two stages DC AC-AC supply inverter allows to have a soft switching in the drive system and, therefore, a limited electromagnetic pollution in the vehicle. The behaviour of this inverter is simulated, in chapter 5, by means of a program adapted from the software A TOSEC. The simulation results show that themodulation frequency for the first stage of the inverter should be in the order of 20kHz for a good current regulation. The simulation is valid for a lspeed up to 75% of its maximum under the rated eurrent and the current control remains efficient when the current is shifted from the electromagnetic force by an angle and even with the presence of toothharmonies
Author: Bertrand Nogarède
Publisher:
ISBN:
Category :
Languages : fr
Pages : 207
Get Book Here
Book Description
CE TRAVAIL EST RELATIF A L'ETUDE DE MOTEURS SYNCHRONES A AIMANTS DE FORTE PUISSANCE A BASSE VITESSE, COMPORTANT UN INDUIT SANS ENCOCHES, APTES A DELIVRER UN COUPLE ELEVE ET DONT LES ONDULATIONS SONT REDUITES. L'EXAMEN DE LA FAISABILITE D'UNE TELLE STRUCTURE MONTRE QUE LA SOLUTION SANS ENCOCHES N'EST VRAIMENT PRATICABLE QUE POUR UNE ALIMENTATION PAR DES COURANTS SINUSOIDAUX. DE PLUS, DANS CE CAS, IL APPARAIT QUE L'AUGMENTATION DU VOLUME D'AIMANT ET LES INCONVENIENTS QU'ENTRAINE CETTE SOLUTION, PAR RAPPORT A DES STRUCTURES PLUS CLASSIQUES, NE SONT PAS DEMESUREES SI L'ON CONSIDERE LES AVANTAGES POTENTIELS QU'ELLE PRESENTE. UNE METHODE DE MODELISATION, PARTICULIEREMENT BIEN ADAPTEE A L'ETUDE DES MACHINES A AIMANTS A INDUIT SANS ENCOCHES, EST ENSUITE PRESENTEE. CETTE METHODE EST BASEE SUR LA RESOLUTION ANALYTIQUE DES EQUATIONS DU CHAMP MAGNETIQUE. A L'AIDE DE CET OUTIL, LES CONFIGURATIONS OPTIMALES RELATIVES A LA DISPOSITION DES AIMANTS ET A LA STRUCTURE DU BOBINAGE SONT RECHERCHEES, EN VUE DE MINIMISER LES ONDULATIONS DU COUPLE ELECTROMAGNETIQUE. L'ENSEMBLE DE CES CONSIDERATIONS THEORIQUES EST ENSUITE VALIDE PAR UNE APPROCHE EXPERIMENTALE, DEVELOPPEE AUTOUR D'UN PROTOTYPE SANS ENCOCHES A AIMANTS. CES ESSAIS MONTRENT QU'IL EST PRATIQUEMENT POSSIBLE D'OBTENIR UNE ONDULATION DE COUPLE TRES REDUITE. LE DISPOSITIF D'ALIMENTATION ELECTRONIQUE PERMETTANT LE CONTROLE DE LA MACHINE EST ENFIN PRIS EN COMPTE. L'ANALYSE PROPOSEE PERMET DE CARACTERISER LE FONCTIONNEMENT SUR LE PLAN DU REGIME FONDAMENTAL ET DES HARMONIQUES INTRODUITES PAR L'ALIMENTATION ELECTRONIQUE
Author: Don Montague
Publisher: Taylor & Francis
ISBN: 9780419199106
Category : Architecture
Languages : en
Pages : 472
Get Book Here
Book Description
This dual-language dictionary lists over 20,000 specialist terms in both French and English, covering architecture, building, engineering and property terms. It meets the needs of all building professionals working on projects overseas. It has been comprehensively researched and compiled to provide an invaluable reference source in an increasingly European marketplace.
Author: Ahmed Chebak
Publisher:
ISBN:
Category :
Languages : fr
Pages : 270
Get Book Here
Book Description
Author: Emma Carlson Berne
Publisher: Referencepoint Press
ISBN: 9781601520197
Category : Science
Languages : en
Pages : 118
Get Book Here
Book Description
Throughout the world, the cause and impact of global warming and climate change is being passionately debated. While many claim that a climate crisis is imminent if greenhouse gases are not curbed, others argue that the effects have been overblown. Through objective overviews, primary sources, and full-color illustrations, this title will examine What Is Global Warming and Climate Change? What Are the Consequences of Global Warming? What Are the Controversies Surrounding Global Warming? What Are the Solutions for Global Warming?
Author: Nawic Education Foundation
Publisher:
ISBN: 9781491730812
Category : Reference
Languages : en
Pages : 0
Get Book Here
Book Description
An extensive listing of the terms and phrases used in construction. Included are many that are encountered daily on the jobsite or in the construction office.
