FR2503950A1 - Rotor for motorcycle alternator - includes ferromagnetic ring carrying permanent magnets encapsulated in plastics coating - Google Patents

Rotor for motorcycle alternator - includes ferromagnetic ring carrying permanent magnets encapsulated in plastics coating Download PDF

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Publication number
FR2503950A1
FR2503950A1 FR8107232A FR8107232A FR2503950A1 FR 2503950 A1 FR2503950 A1 FR 2503950A1 FR 8107232 A FR8107232 A FR 8107232A FR 8107232 A FR8107232 A FR 8107232A FR 2503950 A1 FR2503950 A1 FR 2503950A1
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FR
France
Prior art keywords
rotor
mold
permanent magnets
magnets
ferromagnetic ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
FR8107232A
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French (fr)
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FR2503950B1 (en
Inventor
Florencio Garrido Goig
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GOIG FLORENCIO
Original Assignee
GOIG FLORENCIO
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GOIG FLORENCIO filed Critical GOIG FLORENCIO
Priority to FR8107232A priority Critical patent/FR2503950A1/en
Publication of FR2503950A1 publication Critical patent/FR2503950A1/en
Application granted granted Critical
Publication of FR2503950B1 publication Critical patent/FR2503950B1/fr
Granted legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2786—Outer rotors
    • H02K1/2787—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/2789—Outer rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/279—Magnets embedded in the magnetic core

Abstract

The rotor for the alternator comprises a ferromagnetic ring (1) inside which permanent magnets (2) are held by their own magnetic force. The ring and magnets are placed into a mould and a plastics material, for example nylon, and injected into the mould so as to form a coating over the rotor. The two parts of the mould define the surface shapes which are required of the internal and external surfaces of the rotor. The rotor may be driven on a shaft which includes an excentric surface operating the contact breaker which is required in an ignition system. The rotor requires no further balancing and is extremely light, being 70 per centless than the weight of conventional rotors, and is partic. intended for motorcycle alternators providing ignition current.

Description

Les rotors connus pour l'excitation de petits alternateurs notamment d'alternateurs utilisés pour l'allumage des moteurs de véhicules à deux roues se composent, dans une de leurs réalisations, d'une coupelle d'acier à la périphérie et à la partie interne de laquelle sont fixés des aimants excitateurs ainsi que des masses polaires placées contre ceux-ci. The rotors known for the excitation of small alternators, in particular alternators used for the ignition of two-wheeled vehicle engines, consist, in one of their embodiments, of a steel cup at the periphery and at the internal part. from which excitatory magnets are fixed as well as polar masses placed against them.

Dans une variante, le rotor est obtenu au moyen d'un procédé par coulée en plaçant dans un moule les aimants et les masses polaires et, en injectant ensuite de l'aluminium, on obtient un rotor qui doit alors être tourné aux mesures voulues et équilibré. In a variant, the rotor is obtained by means of a casting process by placing the magnets and the polar masses in a mold and, by then injecting aluminum, a rotor is obtained which must then be turned to the desired measurements and balanced.

De même, le rotor avec sa coupelle en acier qui est obtenu au moyen d'une coulée en aluminium a pour résultat un rotor plus pesant, ce qui rend son utilisation prohibitive lorsqu'il s'agit d'alternateurs qui doivent travailler entre 9000 et 18000 tours par minute. Likewise, the rotor with its steel cup which is obtained by means of an aluminum casting results in a heavier rotor, which makes its use prohibitive when it is alternators which must work between 9000 and 18,000 rpm.

Le rotor conforme à l'invention remédie aux inconvénients énoncés précédemment et présente également des avantages particuliers. The rotor according to the invention overcomes the drawbacks mentioned above and also has particular advantages.

Le Rotor selon l'inver.tion supprime totalement la coulée d'aluminium, la coupelle en acier ainsi que les masses polaires. The Rotor according to the inversion totally eliminates the aluminum casting, the steel cup as well as the polar masses.

Conformément à l'invention, un anneau de matière ferromagnétique porte des aimants permanents fixés à celui-ci par attraction magnétique. According to the invention, a ring of ferromagnetic material carries permanent magnets attached to it by magnetic attraction.

Selon d'autres aspects de l'invention
- un anneau en matière ferromagnétique dans lequel sont fixés des aimants par attraction magnétique est introduit dans un moule dont la partie femelle présente la forme d'une coupelle et dont la partie mâle est un corps cylindrique;
- une matière plastique telle que du nylon est injectée sous pression dans un moule à l'intérieur duquel se trouve un anneau ferromagnétique auquel sont fixés des aimants permanents par attraction magnétique;;
- l'injection d'une matière plastique, telle que du nylon, dans un moule à l'intérieur duquel se trouve un anneau ferromagnétique auquel sont fixés par attraction magnétique des aimants permanents, donne pour résultat un rotor notamment pour l'excitation d'alternateurs avec un boitier pour sa liaison à l'arbre moteur, le rotor étant totalement terminé et prêt à être utilisé sans que celui-ci présente des masses polaires si ce n'est uniquement des aimants permanents;
- le rotor injecté en matière plastique sort de moulage avec un bottier cylindrique;
- le rotor injecté en matière plastique sort de moulage avec deux ou plus de deux protubérances pour r'entralnement de ce rotor.According to other aspects of the invention
- A ferromagnetic ring in which magnets are fixed by magnetic attraction is introduced into a mold, the female part of which has the shape of a cup and the male part of which is a cylindrical body;
- a plastic material such as nylon is injected under pressure into a mold inside which is a ferromagnetic ring to which permanent magnets are fixed by magnetic attraction;
- the injection of a plastic material, such as nylon, into a mold inside which is a ferromagnetic ring to which are fixed by magnetic attraction permanent magnets, results in a rotor in particular for the excitation of alternators with a box for its connection to the motor shaft, the rotor being completely finished and ready to be used without it having polar masses if not only permanent magnets;
- the injected plastic rotor leaves the mold with a cylindrical case;
- The injected plastic rotor leaves the mold with two or more than two protuberances for the positioning of this rotor.

Diverses autres caractéristiques de l'invention ressortent d'ailleurs de la description détaillée qui suit. Various other characteristics of the invention will also emerge from the detailed description which follows.

Des formes de réalisation de l'objet de l'invention sont représentées, à titre d'exemples non limitatifs, aux dessins annexés. Embodiments of the object of the invention are shown, by way of nonlimiting examples, in the accompanying drawings.

La fig. 1 représente le rotor conforme à l'invention en vue de dessus. Fig. 1 shows the rotor according to the invention in top view.

La fig. 2 est une vue en coupe de la fig. 1 le long de la ligne II-II de cette figure. Fig. 2 is a sectional view of FIG. 1 along line II-II of this figure.

La fig. 3 représente une variante du rot or conforme l'invention en vue de dessus. Fig. 3 shows a variant of the gold rot according to the invention in top view.

La fig. 4 est une vue en coupe de la fig. 3 le long de la ligne IV-IV de cette figure. Fig. 4 is a sectional view of FIG. 3 along line IV-IV of this figure.

Le rotor conforme à l'invention, tel qu'il est représenté aux fig. 1 et 2 des dessins, se compose d'un anneau 1 en matière ferromagnétique à l'intérieur duquel sont montés des aimants 2 déjà aimantés dans la disposition représentée aux deasins dans le cas où il existe quatre aimants d'excitation. The rotor according to the invention, as shown in FIGS. 1 and 2 of the drawings, consists of a ring 1 of ferromagnetic material inside which are mounted magnets 2 already magnetized in the arrangement shown in the drawings in the case where there are four excitation magnets.

L'ensemble magnétique formé de l'anneau 1 et des aimants 2 est introduit dans un moule dont la partie femelle présente la forme d'une coupelle et dont la partie mdle est cylindrique. The magnetic assembly formed by the ring 1 and the magnets 2 is introduced into a mold, the female part of which has the shape of a cup and the mdle part of which is cylindrical.

L'injection dans le moule d'une matière, par exemple de nylon, a pour résultat que l'ensemble magnétique formé par l'anneau 1 et les aimants 2 fait corps avec la matière plastique injectée 3. The injection into the mold of a material, for example nylon, results in the magnetic assembly formed by the ring 1 and the magnets 2 becoming one with the injected plastic material 3.

La partie femelle du moule présente la forme que l'on désire donner à la partie externe du rotor, tandis que la partie mSle du moule a la dimension que l'on désire donner au diamètre interne du rotor. The female part of the mold has the shape which it is desired to give to the external part of the rotor, while the mold part of the mold has the dimension which it is desired to give to the internal diameter of the rotor.

Le rotor qui résulte de ce qui précède est un rotor dans lequel 3 est le recouvrement en plastique, 1 est l'anneau en matière ferromagnétique, 2 sont les aimants d'excitation, 4 est un orifice central traversant le rotor, et 5 est un bottier dans la partie intérieure du rotor pour le relier à 11 élément d'entratnement de l'arbore moteur. The rotor which results from the above is a rotor in which 3 is the plastic covering, 1 is the ferromagnetic ring, 2 are the excitation magnets, 4 is a central orifice passing through the rotor, and 5 is a housing in the inner part of the rotor to connect it to the drive element of the motor shaft.

I1 est possible que l'élément d'entratnement de ltarbre moteur soit en mtme temps l'excentrique qui actionne le rupteur d'un système d'allumage ordinaire. It is possible that the drive element of the engine shaft is at the same time the eccentric which actuates the switch of an ordinary ignition system.

Le rotor conforme à l'invention, lorsqu'il sort du moule, est complètement terminé et présente ses cotes exactes sans qu'il soit nécessaire de le tourner ou de l'équilibrer. The rotor according to the invention, when it leaves the mold, is completely finished and has its exact dimensions without it being necessary to turn or balance it.

Le bottier 5 peut présenter la forme géométrique voulue selon ltélément d'entratnement fixé à l'arbre moteur. The case 5 can have the desired geometric shape depending on the drive element fixed to the motor shaft.

De manière à perfectionner le rotor en matière plastique et pour qu'également la fabrication du moule soit moins conteuse, il est possible, comme représenté aux fig. 3 et 4, que le bottier de centrage et d'entraRnement du rotor soit cylindrique et présente deux ou plus de deux protubérances d'entraSnement et que, de même, ces protu- bérances viennent aussi de moulage. In order to improve the plastic rotor and so that the manufacture of the mold is less contentious, it is possible, as shown in FIGS. 3 and 4, that the centering and drive housing of the rotor is cylindrical and has two or more than two drive protuberances and that, likewise, these protuberances also come from molding.

Les fig. 3 et 4 représentent un rotor en matière plastique analogue à celui représenté aux fig. 1 et 2, mais le bottier 7 est cylindrique et porte les protubérances cylindriques 8 et 9 d'entratnement.  Figs. 3 and 4 show a plastic rotor similar to that shown in FIGS. 1 and 2, but the case 7 is cylindrical and carries the cylindrical protuberances 8 and 9 for driving.

Le rotor conforme à l'invention est extrêmement léger et pèse à peu près 70 * de moins que les rotors de type habituel, ce qui lui permet de tourner à des vitesses élevées tout en présentant un fonctionnement très silencieux.  The rotor according to the invention is extremely light and weighs approximately 70 * less than the rotors of the usual type, which allows it to rotate at high speeds while exhibiting very silent operation.

Claims (6)

REVENDICATIONS 1 - Perfectionnements apportés aux rotors notamment pour l'excitation d'alternateurs destinés à l'allumage de moteurs de véhicules à deux ou plus de deux roues, caractérisé principalement par le fait qu'un anneau de matière ferromagnétique porte des aimants permanents fixés à celui-ci par attraction magnétique. 1 - Improvements made to the rotors in particular for the excitation of alternators intended for the ignition of vehicle engines with two or more than two wheels, characterized mainly by the fact that a ring of ferromagnetic material carries permanent magnets fixed to that -this by magnetic attraction. 2 - Rotor selon la revendication 1, caractérisé en ce qu'un anneau en matière ferromagnétique dans lequel sont fixés des aimants par attraction magnétique est introduit dans un moule dont la partie femelle présente la forme d'une coupelle et dont la partie rale est un corps cylindrique. 2 - Rotor according to claim 1, characterized in that a ferromagnetic ring in which magnets are fixed by magnetic attraction is introduced into a mold whose female part has the shape of a cup and whose rale part is a cylindrical body. 3 - Rotor selon l'une des revendications 1 et 2, caractérisé en ce qu'une matière plastique, par exemple du nylon, est injectée sous pression dans un moule à l'intérieur duquel se trouve un anneau ferromagnétique auquel sont fixés des aimants permanents par attraction magnétique. 3 - Rotor according to one of claims 1 and 2, characterized in that a plastic material, for example nylon, is injected under pressure into a mold inside which is a ferromagnetic ring to which are fixed permanent magnets by magnetic attraction. 4 - Rotor selon l'une des revendications 1 à 3, caractérisé par l'injection d'une matière plastique, par exemple du nylon, dans un moule à l'intérieur duquel est placé un anneau ferromagnétique auquel sont fixés par attraction magnétique des aimants permanents, en donnant pour résultat un rotor notamment pour l'excitation d'alternateurs avec un bottier pour sa liaison à l'arbre moteur, le rotor étant totalement terminé et prêt à Qtre utilisé sans que celui-ci présente des masses polaires si ce n1 est uniquement des aimants permanents. 4 - Rotor according to one of claims 1 to 3, characterized by the injection of a plastic material, for example nylon, into a mold inside which is placed a ferromagnetic ring to which are fixed by magnetic attraction magnets permanent, resulting in a rotor especially for the excitation of alternators with a case for its connection to the motor shaft, the rotor being completely finished and ready to be used without it having polar masses if this n1 is only permanent magnets. 5 - Rotor selon l'une des revendications 1 à 4, caractérisé en ce que le rotor injecté en matière plastique sort de moulage avec un bottier cylindrique. 5 - Rotor according to one of claims 1 to 4, characterized in that the injected plastic rotor leaves the mold with a cylindrical shoemaker. 6 - Rotor selon l'une des revendications 1 à 5, caractérisé en ce que le rotor injecté en matière plastique sort de moulage avec deux ou plus de deux protubérances pour l'entratnement de ce rotor.  6 - Rotor according to one of claims 1 to 5, characterized in that the injected plastic rotor leaves the mold with two or more than two protrusions for the drive of this rotor.
FR8107232A 1981-04-10 1981-04-10 Rotor for motorcycle alternator - includes ferromagnetic ring carrying permanent magnets encapsulated in plastics coating Granted FR2503950A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8107232A FR2503950A1 (en) 1981-04-10 1981-04-10 Rotor for motorcycle alternator - includes ferromagnetic ring carrying permanent magnets encapsulated in plastics coating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8107232A FR2503950A1 (en) 1981-04-10 1981-04-10 Rotor for motorcycle alternator - includes ferromagnetic ring carrying permanent magnets encapsulated in plastics coating

Publications (2)

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FR2503950A1 true FR2503950A1 (en) 1982-10-15
FR2503950B1 FR2503950B1 (en) 1984-10-26

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FR8107232A Granted FR2503950A1 (en) 1981-04-10 1981-04-10 Rotor for motorcycle alternator - includes ferromagnetic ring carrying permanent magnets encapsulated in plastics coating

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0134670A1 (en) * 1983-07-19 1985-03-20 The Garrett Corporation Method for making a permanent magnet rotor
FR2598047A1 (en) * 1986-04-23 1987-10-30 Etri Sa Electric motor with a one-piece rotor and method for manufacturing such a motor
FR2711455A1 (en) * 1993-10-19 1995-04-28 Valeo Systemes Dessuyage Rotor with a single fixing on a rotation shaft, motor-driven fan unit including a driving rotating electrical machine, and a motor with electronic commutation equipped with such a rotor
FR2802729A1 (en) * 1999-12-17 2001-06-22 Siemens Automotive Moteurs Ele Fabrication process for electric motor field magnets, comprises placing permanent magnets within mould and against central core, applying pressure through peripheral frame and overmoulding fixings
EP3258573A1 (en) * 2016-06-15 2017-12-20 Johnson Electric S.A. Rotor, motor and electric tool utilizing the same
EP3509192A1 (en) * 2018-01-09 2019-07-10 Volkswagen Aktiengesellschaft Outer rotor of a pump and method for producing an outer rotor
CN114347362A (en) * 2021-12-20 2022-04-15 江门市万华塑料制品有限公司 Magnetic ring injection molding method and plastic magnetic ring thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1280347A (en) * 1961-02-13 1961-12-29 Bosch Gmbh Robert Magnetic flywheel especially for ignition magneto
US3693033A (en) * 1971-06-24 1972-09-19 Electromechanisms Inc Key operated pulse generating device
DE2505937A1 (en) * 1975-02-13 1976-08-19 Huebner Johannes Magnet bedding arrangement in electric machine housing - immovably held in exactly predefined position by embedding in synthetic resin
FR2445053A1 (en) * 1978-12-23 1980-07-18 Flux Geraete Gmbh LV DC motor with permanent magnets - held to stator casing by injecting heat-resistant plastics into keyways

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1280347A (en) * 1961-02-13 1961-12-29 Bosch Gmbh Robert Magnetic flywheel especially for ignition magneto
US3693033A (en) * 1971-06-24 1972-09-19 Electromechanisms Inc Key operated pulse generating device
DE2505937A1 (en) * 1975-02-13 1976-08-19 Huebner Johannes Magnet bedding arrangement in electric machine housing - immovably held in exactly predefined position by embedding in synthetic resin
FR2445053A1 (en) * 1978-12-23 1980-07-18 Flux Geraete Gmbh LV DC motor with permanent magnets - held to stator casing by injecting heat-resistant plastics into keyways

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0134670A1 (en) * 1983-07-19 1985-03-20 The Garrett Corporation Method for making a permanent magnet rotor
FR2598047A1 (en) * 1986-04-23 1987-10-30 Etri Sa Electric motor with a one-piece rotor and method for manufacturing such a motor
FR2711455A1 (en) * 1993-10-19 1995-04-28 Valeo Systemes Dessuyage Rotor with a single fixing on a rotation shaft, motor-driven fan unit including a driving rotating electrical machine, and a motor with electronic commutation equipped with such a rotor
FR2802729A1 (en) * 1999-12-17 2001-06-22 Siemens Automotive Moteurs Ele Fabrication process for electric motor field magnets, comprises placing permanent magnets within mould and against central core, applying pressure through peripheral frame and overmoulding fixings
EP3258573A1 (en) * 2016-06-15 2017-12-20 Johnson Electric S.A. Rotor, motor and electric tool utilizing the same
US10673295B2 (en) 2016-06-15 2020-06-02 Johnson Electric International AG Rotor, motor and electric tool utilizing the same
EP3509192A1 (en) * 2018-01-09 2019-07-10 Volkswagen Aktiengesellschaft Outer rotor of a pump and method for producing an outer rotor
CN114347362A (en) * 2021-12-20 2022-04-15 江门市万华塑料制品有限公司 Magnetic ring injection molding method and plastic magnetic ring thereof

Also Published As

Publication number Publication date
FR2503950B1 (en) 1984-10-26

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