FR2534085A1

FR2534085A1 - Compact DC motor

Info

Publication number: FR2534085A1
Application number: FR8211702A
Authority: FR
Original assignee: Individual
Current assignee: Individual
Priority date: 1982-06-28
Filing date: 1982-06-28
Publication date: 1984-04-06

Abstract

On each face of its armature, the DC motor has a plane commutator whose plates 7 join together the adjacent ends of the layers 1 and 2 of the winding. Layer 1 has straight ends which go directly into holes in the plates and layer 2 is formed by involutes of a circle arranged in flat coils.

Description

NOTEUR A - COURANT CONTINU A TRES FAIBLE ENCOMBREMENT
Pour profiter pleinement de l'utilisation des nouveaux aimants aux terres rares, on se trouve conduit à mettre davanta-e de polies inducteurs, ce qui allê:e la culasse, raccourcit les têtes de bobines et diminue le nombre d'ampèretours à fournir, mais présente l'inconvénient d'augmenter le fréquence du flux magnétique dans l'induit. D'un autre coté, on réduit les pôles à des plaques aimantées incurvées et on diminue ainsi beaucoup le diamètre de la culasse.NOTEER A - CONTINUOUS CURRENT WITH VERY LOW SIZE
To take full advantage of the use of the new rare earth magnets, we are led to put more polished inductors, which reduces: the cylinder head, shortens the coil heads and decreases the number of amperes turns to provide, but has the drawback of increasing the frequency of the magnetic flux in the armature. On the other hand, the poles are reduced to curved magnetic plates and the diameter of the cylinder head is thus greatly reduced.

On n'a alors plus assez de place autour du collecteur pour loger les balais.We then no longer have enough space around the collector to house the brushes.

Enfin, puisque l'on n'a plus de pertes dans l'inducteur et moins de pertes dans les têtes de bobines, on pourrait à rendement égal augmenter beaucoup la densité de courant dans l'enroulement induit, mais la disposition traditionnelle ne permet pas d'évacuer assez bien les pertes par effet Joule qui en résulteraient
L'invention consiste en un nouveau moyen de constituer l'enroulement induit et le collecteur, cet ensemble s'accommodant beaucoup mieux que la disposition habituelle de fréquences élevées et de densités de courant fortes si bien qu'il permet d'atteindre des puissances massiques bien supérieures
La planche ci-jointe où la figure 1 est une coupe passant par l'axe et la figure 2 une coupe perpendiculaire à l'axe représente un exemple de réalisation suivant l'invention.Finally, since there are no more losses in the inductor and less losses in the coil heads, it would be possible, for equal efficiency, to greatly increase the current density in the induced winding, but the traditional arrangement does not allow to evacuate fairly well the losses by Joule effect which would result therefrom
The invention consists of a new means of constituting the induced winding and the collector, this assembly being much better suited than the usual arrangement of high frequencies and high current densities so that it allows mass powers to be achieved. much superior
The attached plate where Figure 1 is a section passing through the axis and Figure 2 a section perpendicular to the axis represents an exemplary embodiment according to the invention.

Chaque encoche--du tambour de l'induit est constituée par une partie externe 1 ronde et une partie interne 2 étroite. Dans chaque partie ronde se trouve un conducteur rond isolé qui dépasse du tambour par des surlontueurs rectilignes 3
Dans chaque partie étroite se trouve un ruban conducteur isolé qui, pour faciliter sa mise en forme et aussi diminuer les pertes par courants induits parasites, est subdivisé en deux suivant la hauteur. Il présente un coude sur chant 4 puis est replié, formé en développante de cercle 5, et à nouveau coudé sur chant à son extrémité 6. Des lames trapésoidales 7 sont percées d'un trou à une extrémité pour recevoir les surlongueurs des barres rondes 3 et fendues à l'autre pour recevoir les extrémités coudées 6 des rubans minces. La figure 2 montre qu'elles sont disposées en oblique de manière à permettre de raccourcir les développantes de cercle 5.Each notch - of the armature drum is constituted by a round external part 1 and a narrow internal part 2. In each round part there is an insulated round conductor which protrudes from the drum by rectilinear overshooters 3
In each narrow part there is an insulated conductive tape which, to facilitate its shaping and also reduce losses by parasitic induced currents, is subdivided into two according to the height. It has an elbow on edge 4 then is folded, formed in an involute of circle 5, and again bent on edge at its end 6. Trapezoidal blades 7 are pierced with a hole at one end to receive the extra lengths of the round bars 3 and slit to each other to receive the bent ends 6 of the thin ribbons. FIG. 2 shows that they are arranged obliquely so as to shorten the involutes of circle 5.

Les lames trapéjoldales sont séparées par de l'isolant et sont solidarisées par de la résine armée 8 si-bien que l'ensemble qu'elles constituent sur chacune des faces du rotor peut servir de collecteur et recevoir des balais 9 et 10. Ces balais traversent les flasques et sont protégés par des capots isolants 11 The trapezoidal blades are separated by insulation and are joined by reinforced resin 8 so that the assembly which they constitute on each of the faces of the rotor can serve as a collector and receive brushes 9 and 10. These brushes pass through the flanges and are protected by insulating covers 11

Claims

CLAIMS 1 - Direct current electric motor composed of a coil pole inductor or permanent magnets and an armature provided with a winding in two layers and 2 as well as a collector, characterized in that this collector is plane that these are its blades 7 which on the face where it is located provide the connexion between the opposite ends of the conductors of the two layers 1 and 2.

2 - Direct current electric motor according to claim 1 characterized e that the blades 7-of the collector are hollowed out of grooves 8 which make it possible to join all together by filling with a resin which can be: reinforced by fiber glass.

3 - DC electric motor according to any one of the claims; 1 or 2, characterized in that the notches which receive the induced winding carry a round external part 1 and a rectangular and larger internal part: thin 2.

4 - DC electric motor according to any one of claims 1 to 3 characterized in that the external parts of the notches 1 receive rounds whose ends are threaded directly into the outer ends of the blades 7 of the collector.

5 - DC electric motor according to any one of the specifications; 1 to 4 characterized in that the conductive tapes which occupy the in nes 2 parts of the notches are folded over the sides of the drum. rotor and curved by developing circles 5, their ends 6 coming to be inserted in fe placed at the internal ends of the blades 7.

6 - DC electric motor according to any one of claims 1 to 5 characterized in that the ribbons which occupy the internal parts of the pins 2 are subdivided in the direction of the height.

7 - Direct current electric motor according to any one of claims 1 to 6, characterized in that the connections of the two faces of the armature are made: in the same way with blades 7 which make the connections between the two pins 1 and 2 of the conductors.

8 - DC electric motor according to any one of claims 1 to 7 characterized in that the two collectors thus formed are all: two used and receive brush crowns 9, 10, those which are the same parallel line to the axis being connected in parallel.

9 - Direct current electric motor according to any one of Claims 1 to 8, characterized in that the blades 7 are inclined relative to the radial direction, in the direction which makes it possible to shorten the connections in involutes of a circle 5.

10 - Direct current electric motor according to any one of claims 1 to 9 characterized in that intervals 14, 15, 16 are provided on either side of the involutes of the circle and of the manifold (s) and, thanks to their rotational movement, they operate as centrifugal fans, taking air through holes near the axis 13, rejecting it through holes near the periphery 17.