EP1497907A1 - Convertisseur d'energie electromecanique - Google Patents

Convertisseur d'energie electromecanique

Info

Publication number
EP1497907A1
EP1497907A1 EP03717288A EP03717288A EP1497907A1 EP 1497907 A1 EP1497907 A1 EP 1497907A1 EP 03717288 A EP03717288 A EP 03717288A EP 03717288 A EP03717288 A EP 03717288A EP 1497907 A1 EP1497907 A1 EP 1497907A1
Authority
EP
European Patent Office
Prior art keywords
elements
rotor
energy converter
magnetic
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.)
Withdrawn
Application number
EP03717288A
Other languages
German (de)
English (en)
Inventor
Steffen Walter
Michael Georgi
Peter Hopf
Claus Rein
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.)
Coreta GmbH
Original Assignee
Coreta GmbH
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 Coreta GmbH filed Critical Coreta GmbH
Publication of EP1497907A1 publication Critical patent/EP1497907A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/38—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary
    • H02K21/42—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary with flux distributors rotating around the armatures and within the magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/38—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary
    • H02K21/44—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating flux distributors, and armatures and magnets both stationary with armature windings wound upon the magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
    • H02K5/1675—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotary shaft at only one end of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/09—Structural association with bearings with magnetic bearings

Definitions

  • Air gap coils are often used for miniaturized motors.
  • the current conductors required to generate the force are accommodated in the air gap between the flux-conducting elements of the magnetic circuits.
  • US-PS 3796039, CH-570 648, JP 01-009372, DE 4205985 C2 and DE 19902371 AI describe the use of air gap coils as examples. Regardless of whether wound wire coils or coils manufactured using microtechnical processes are used, these have the disadvantage that, because of their spatial expansion, they require a relatively large air gap, which reduces the effective magnetic flux density and thus the power density of the energy converter.
  • These types of transducers require a high level of production expenditure, in particular for producing the coil arrangement.
  • Single-phase stepper motors have a simpler design, in particular for miniaturized converters.
  • An embodiment is described in US 4277704. This has an asymmetrical structure and, regardless of the number of poles, has a single concentrated coil, which is attached to a one-piece yoke plate. The flux is routed to the permanent magnetic rotor via pole legs.
  • the bad volume utilization is disadvantageous low efficiency and the difficult structural integration into technical devices due to the shape of the energy converter.
  • This type of electrodynamic converter is used in US 6120177 as a clock drive and as a generator for generating electrical energy from mechanical kinetic energy.
  • the power density can be increased by flux concentration using soft magnetic elements.
  • DE 3135385 C2 describes, by way of example, the use of a stator laminated core which forms pole legs and at the same time reduces the effective air gap.
  • the pole legs have coils.
  • the rotor is designed as an external rotor and carries an alternating radially polarized magnetic ring with a cylindrical yoke.
  • the large moment of inertia is a disadvantage.
  • the distributed coils limit the miniaturizability and increase the manufacturing effort.
  • Flux concentration and better miniaturizability combine claw pole type transducers such as represented in DE 69613207 T2 and US 4644246. These have alternating toothed stator yokes placed around a ring coil and permanent magnets magnetized in the rotor depending on the number of poles of the stator. Multi-pole stator arrangements can be realized with a single coil. The high leakage flux between the mutually folded stator teeth reduces the power density and the efficiency of such converters.
  • DE 2560231 C2 discloses a DC motor in which a tachometer generator is integrated for speed control.
  • the tachometer generator consists of a rotor, a soft magnetic return part, a ring magnet, a ring coil in the return part and a compensation coil outside the return part.
  • the rotor of the tachometer generator is attached to the motor shaft and consists of a on the circumference toothed soft magnetic disc, a soft magnetic socket and a driver.
  • the alternating radially magnetized ring magnet is embedded in the yoke. Poles of the same name of the magnet face the teeth of the rotor radially.
  • the magnetic flux that changes during rotation is linked to the measuring coil and induces a voltage proportional to the speed.
  • the flux is routed from the ring magnet via the return part, via an inner radial air gap to the bushing, via the toothed disk and via an outer radial air gap back to the magnet.
  • the air gaps must be chosen to be relatively large.
  • the radial air gap at the socket is unsuitable for a miniaturized construction.
  • the integration of an independent rotor bearing is difficult.
  • miniaturization a considerable increase in stray fluxes is to be expected and the simultaneous effect of the magnetic forces on all teeth in connection with the miniaturization generates a not negligible cogging torque. Since the output power of tachogenerators is intended to be very low and there is sufficient construction space available, arrangements according to DE 2560231 C2 can be used well there.
  • the object of the invention is to realize an electromechanical energy converter with a fixed coil arrangement and high torque relevant to energy conversion, which has a high energy conversion density even at low speed, has a simple and robust construction and can also be easily produced in small sizes.
  • the object of the invention is achieved by an electromechanical energy converter according to claim 1.
  • the invention is an energy converter which is suitable both for converting mechanical into electrical energy and for converting electrical into mechanical energy and in which the mechanical energy exchange with the environment via a rotor according to claim 1 and the electrical energy exchange with the environment via Connections of a flat coil according to claim 1 takes place.
  • the magnetic flux change necessary for an energy conversion and its interaction with a coil is carried out in principle in an analogous manner to that in DE 25 60 231 C2.
  • an energy converter according to claim 1 is structurally more versatile, significantly more compact, smaller and significantly more powerful, and can be implemented as an independent device.
  • a core zone is defined as the space that is enclosed in the axial projection of the flat coil inner diameter.
  • a flat coil is understood to mean a coil in which the ratio of the coil height to the coil outer diameter is less than one.
  • the arrangement of the flat coil fixed according to claim 1 has the advantage that fixed wiring is possible for contacting the flat coil and a grinder arrangement can be dispensed with.
  • the concentric arrangement around the axis of rotation of the rotor, which also represents a system axis for the energy converter, and the design as a flat coil structurally impose a rotationally symmetrical, preferably flat and space-efficient design of the energy converter.
  • the magnetic flux elements and permanent magnet elements arranged around the flat coil completely envelop the flat coil except for air gaps that are functionally necessary, the term “air gap” generally referring to a magnetically inactive space and thus also including areas filled with non-magnetic solids.
  • the air gaps are always arranged concentrically around the axis of rotation of the energy converter and are therefore still referred to as ring air gaps.
  • the magnetic flux elements result in axially-radially oriented magnetic circuits. Field lines emanating from equipolar permanent magnets then run in a closed axial-radial path around and through the flat coil, on the end faces in the radial as well as on the outside and through the center in the axial direction, and completely wrap all coil turns.
  • the permanent magnet elements - as a magnetic ring - are also arranged in a fixed and rotationally symmetrical manner.
  • the permanent magnet elements of the magnetic ring can consist of individual permanent magnets or of permanent magnets which are provided on one or both sides with pole pieces made of soft magnetic material. It is also advantageous to form a closed magnetic ring from one piece - for example as a pressed, injection-molded or sintered ring, which is then magnetized sector-wise with alternating polarity. Arranged between other soft magnetic magnetic flux elements, the axial, radial or axial-radial pole alignment supports the desired axial-radial field line course in and around the flat coil in the energy converter.
  • the energy converter has magnetic flux elements which are designed as tooth elements and which form a soft magnetic tooth element ring in a rotationally symmetrical arrangement with the axis of rotation of the rotor.
  • This toothed element ring is also part of the rotor.
  • Magnet ring and toothed element ring are arranged coaxially and separated from each other only by a narrow ring air gap.
  • the field lines emanating from the permanent magnets - apart from design-related and unavoidable, parasitic magnetic short-circuits - essentially close in two ways.
  • a short way is via tooth elements, neighboring permanent magnet elements and from there via magnetic flux elements that act as a back yoke.
  • the tooth element gaps are important so that the magnetic flux through the tooth elements can be conducted through the coil center at all and is not short-circuited beforehand.
  • the need for sufficiently large tooth element gaps is one of the main obstacles to miniaturization. Only field lines that flow around the coil in an axially-radially oriented magnetic circuit are for an effective electromagnetic coupling of permanent magnets and flat coil and thus for one Energy conversion relevant.
  • the course of the flux within a magnetic circuit is dependent on its shape, that is, also on the relative position of its magnetic flux elements and, in the case of variable reluctance, is associated with a corresponding force effect between the magnetic flux elements.
  • the ring air gap between the magnetic ring and tooth elements according to claim 1 can be realized very closely because of the radial, axial or axial-radial arrangement. This results in very favorable operating points for the permanent magnets, which fulfills an essential prerequisite for effective energy conversion at low speeds.
  • the different preferred course of the magnetic field lines depending on the mutual tooth element-to-permanent magnet element position, along the short path or over the long axial-radial path, causes cogging moments in corresponding rotor positions.
  • By optimizing the width and shape of the tooth element it is possible to allow the corresponding forces to act against each other with regard to their influence on a torque and thus to influence, that is to say also to minimize, the individual detent moments and the total detent torque.
  • both cogging torques and possible stray fluxes can be reduced by curved shapes of the tooth elements, such as sickle shapes.
  • the core zone is as small as possible, i.e. the flat coil has the smallest possible inner diameter in order to be able to accommodate many low-resistance windings, and if the magnetic ring has the largest possible inner diameter in order to have a large effective one
  • the magnet cross section to realize a high number of poles, to achieve a high peripheral speed on the rotor periphery for the purpose of high magnetic flux changes and to minimize parasitic magnetic short circuits due to spatial confinement.
  • the tooth element gaps can be made larger or drawn deeper in the central direction, and thus magnetic stray fluxes can be reduced.
  • a large outer diameter of the magnetic ring can be easily realized by arranging the ring air gap between the toothed element ring and the magnetic ring in a peripheral area outside the core zone. This also applies to other energy converters, such as the tachometer generator in DE 2560231 C2.
  • Claim 1 allows the two basic construction variants: core zone without and core zone with ring air gap. In the first case, both ring air gaps are arranged outside the core zone and a corresponding magnetic flux element belonging to the rotor disk encloses the flat coil from the inside through the core zone. The diameter of this magnetic flux element can be minimized to such an extent that a magnetic flux in the magnetically unsaturated region is just guaranteed.
  • the inner diameter of a flat coil can also be made correspondingly small.
  • a guide or bearing function for the rotor must be fulfilled here. If there are a plurality of ring air gaps within the core zone, at least one ring air gap must be arranged axially between the rotor disk and a fixed magnetic flux element, the section of a larger ring air gap, which is structurally separate, consisting of a radial and an axial part, also being used as the ring air gap. is seen.
  • the magnetic flux between the rotor disk and the fixed magnetic flux element can take place directly via this axial annular air gap.
  • this is done only in an area outside the rotor shaft. Since the cross-sectional area of a rotor shaft in conventional designs is already small in comparison to the air gap area between the rotor and the fixed magnetic flux element, the magnetic flux would also preferably take place via the axial ring air gap and not via the radial ring air gap, which is also due to the design, even with soft magnetic rotor shafts.
  • a bearing according to claim 2 can be easily integrated with the axial annular air gap. The combination of the magnetic flux control function with the storage function results in a space saving, which is particularly important with regard to miniaturization.
  • axial ring air gaps allow optimal design freedom in material selection and dimensioning to ensure all bearing, guiding and magnetic flux functions within the core zone and to minimize the core zone itself, which ultimately enables small flat coil inner diameters and thus high energy conversion densities.
  • an additional space-filling storage is not yet integrated and the field line guidance, on the other hand, takes place only or preferably via a radial air gap between the rotor and the fixed magnetic flux elements.
  • a radial ring air gap in the core zone of such an energy converter can be regarded as unfavorable for miniaturization.
  • An axial ring air gap in the core zone according to claim 1 is structurally and functionally more compatible with a flat energy converter than radial ring air gaps, so that the advantages of a flat design with regard to a high energy conversion density can be exploited even better.
  • Axial ring air gaps for energy converters with a ring air gap in the core zone or the constructive outsourcing of air gaps from the core zone allow more compact designs with small core zone diameters and allow high power densities even with miniaturization of the energy converters.
  • hard material sliding layers only have layer thicknesses of a few micrometers or less, very narrow ring air gaps can be realized and the axially-radially oriented magnetic circuits are practically hardly weakened at this point.
  • the hard material sliding layer can be applied on the rotor side, on the fixed magnetic flux element or on both bearing sides.
  • An iron hard material layer for example due to the incorporation of foreign atoms or another change in the atomic iron lattice, is also very advantageous because of the resulting zero air gap.
  • a warehouse design according to claim 3 brings about a very high increase in efficiency compared to other, more air gap-forming solutions. Furthermore, there are great advantages for the simplicity, robustness and reliability of the energy converters as well as for the implementation of small sizes.
  • Flat coils can be achieved according to claim 4. With single-level spiral coils using metal tape as Cable material - technologically particularly effective with flat coils - a very high degree of filling of the coil winding can be achieved. Correspondingly wound flat coils have a higher mechanical stability than coils wound from round wire, are easier to assemble, have a higher inductance with a lower ohmic resistance, and thus higher energy conversions per unit volume can be achieved with lower losses.
  • Energy converters according to claims 1 to 4 can be expanded or combined in a structurally simple and advantageous manner.
  • a rotor or certain rotor areas can be used by two energy converter units according to claims 1 to 4.
  • Advantages can arise, for example, in terms of material savings, compensation of magnetic forces or reduction of bearing forces as well as the improvement of the functioning of the energy converter.
  • Energy converters according to claim 6 can be operated as self-starting synchronous motors with a corresponding design of the tooth elements.
  • the preferred direction can be determined, for example, by bevels or crescent-shaped extensions on the tooth element heads.
  • a motor function with an energy converter according to claim 6 can be implemented, but the use of two energy converters coupled via the rotors is of great advantage in order to be able to control the running direction, starting and running properties better or easier.
  • Such a coupling can be realized both by axially connecting two energy converters according to claim 5 or by a forced coupling, for example via a transmission, according to claim 7.
  • Finally over a coupling of energy converters can influence the total cogging torque, so that overall the energy converter according to claims 1 to 7 has a high constructive potential for reducing cogging torques.
  • Energy converters according to claims 1 to 7 are simple, robust, reliable and inexpensive to design. Almost all parts of an electromechanical energy converter according to claims 1 to 7 can be integrated into the energy conversion process and fixed magnetic flux elements can simultaneously take on other functions, such as storage or housing functions. As a result and because of the basic construction according to claim 1, the energy converter has a high volume-related energy conversion density. The energy converter can be manufactured using conventional manufacturing techniques, and even small sizes can be implemented well and with a high power density.
  • Fig. 6 energy converter from Fig. 5 along section CC (detail)
  • Fig. 7 energy converter with curved permanent magnet elements.
  • Fig. 8 energy converter, coupled via a common rotor.
  • Fig. 9 energy converter with basket-shaped gear wheel.
  • Fig. 10 energy converter, coupled with positive rotation
  • a rotor shaft 3 made of polished sapphire is freely rotatable about its axis of rotation 4 in a central perforated pin 1 of a pin disk 2.
  • a rotor disk 5 made of silicon iron is firmly connected to the rotor shaft 3, and a toothed element ring 6 is firmly attached to its outer circumference.
  • the toothed element ring 6 consists of a metal-metal composite of four ring sectors, silicon iron and brass. The iron ring sectors form the tooth elements 7 and the brass ring sectors four tooth element gaps 8 according to claim 1.
  • a toothed wheel 9, toothed wheel 9 and rotor shaft 3 form a rotor 10.
  • a flat coil 11 is placed.
  • the core zone 12 of the energy converter is represented by two broken lines. According to claim 1, it is limited by the inner diameter of the flat coil 11.
  • a magnet ring 13 made of plastic-bonded neodymium-iron-boron magnetic material is very close to this flat coil 11 - also between the disk-shaped part of the journal disk 2 and the toothed element wheel 9 arranged.
  • the magnet ring 13 is magnetized in an axially alternating manner and can therefore be considered to consist of eight individual permanent magnet elements 14.
  • Flat coil 11 and magnetic ring 13 are firmly glued to the journal disc 2.
  • the housing capsule is firmly attached and glued, which also closes the entire arrangement on the rear side of the toothed wheel 9 and protects it against contamination.
  • a slide bearing 16 consisting of sintered bronze, is arranged within the perforated journal 1 and functions as a radial and an axial bearing. All parts are arranged rotationally symmetrically around the axis of rotation 4, which at the same time represents a system axis for the entire electromechanical energy converter.
  • annular air gap 17 of approximately 0.05 mm between the rotor disk 5 and the peg 1 of the peg disk 2, via which practically the entire magnetic flux takes place in the core zone 12.
  • Another 0.1 mm thick annular air gap 18 is located between the tooth elements 7 and the magnetic ring 13.
  • the pinned disk 2, permanent magnet elements 14, toothed element wheel 9 and the annular air gaps 17 and 18 form the axially-radial in the frontal position of tooth elements 7 and permanent magnet elements 14 oriented magnetic circuits 19, in which the magnetic field lines 20 flow radially around and through the flat coil 11 very closely.
  • the annular air gaps 17 and 18 represent magnetic resistances, which, however, because of the function of the electromagnetic transducer according to claim 1 is inevitable.
  • the rotor 10 rotates, all the tooth elements 7 pass together the permanent magnet elements 14 of one pole orientation and then that of the opposite pole orientation. 1 illustrates the case in which permanent magnet elements 14 and tooth elements 7 face each other frontally.
  • the preferred course of the magnetic field lines 20 takes place here over the long paths along the axially-radially oriented magnetic circuits 19 with largely separate axially-radial field line courses for each permanent magnet element 14 around and through the flat coil 11.
  • FIG. 2 shows a top view of the same energy converter as in FIG. 1, but here shows the intermediate position of tooth elements 7 to the permanent magnet elements 14, in which the magnetic field lines 20 from the permanent magnet elements 14 preferably pass over the tooth elements 7 by a short path close to the respectively adjacent permanent magnet element 14 and from there via a rear magnetic flux element 21 - here the pin washer 2 - back to the original permanent magnet element 14.
  • the mechanical energy exchange to the surroundings takes place via the pinion 22 and the electrical energy exchange takes place via two coil wire ends 23.
  • FIG. 3 shows an energy converter according to claim 1, in which the permanent magnet elements 14 are arranged in this way that the magnetic field lines 20 emerge from them in the radial direction and thus also reach the toothed element ring 6 via the annular air gap 18.
  • the magnet ring 13 is composed of individual permanent magnet elements 14 in the form of small cuboids, which have a gap of half a cuboid width are glued directly to the inner wall of a cup-shaped conical disk 2 here.
  • the permanent magnet elements 14 consist of samarium-cobalt cuboids and thus represent individual magnets 24.
  • the tooth element gaps are milled directly into the soft magnetic rotor disk 5 and thus consist of air.
  • the tooth elements 7 are thereby formed and the tooth element ring 6 and the rotor disk 5 thus result in a single component.
  • a - a few micrometers thick hard material sliding layer 25 is located on the peg 1 of the peg washer 2. This is applied to both sides of the end faces and inside the peg 1.
  • the distance between the toothed wheel 9 and the pinion 22, both of which are firmly mounted on the rotor shaft 3, is only 5 ⁇ m larger than the length of the perforated pin 1, including the hard material coating. The same distances exist between the rotor shaft 3 and the inner hole in the bearing journal 1.
  • FIG. 3 has the advantage that the flat coil 11 can effectively fill the entire area between the toothed wheel 9 and the pintle washer 2 and the annular air gap 18 between the permanent magnet elements 14 and the toothed elements 7 is kept very narrow in terms of construction and manufacturing technology because of its radial position can.
  • the core zone 12 can have a very small diameter, since the peg 1 is used very efficiently both as a magnetic flux element 21 and as a plain bearing body.
  • the flat coil 11 consists of a one-level spiral coil, in which the coil material is coated metal tape measuring 1.2 x 0.02 mm.
  • FIG. 4 shows the arrangement of FIG. 3 in a top view and, as in FIG. 2, the intermediate position of tooth elements 7 and permanent magnet elements 14. 1-4 have a diameter of 12 mm and are 3 mm high.
  • FIG. 5 shows an energy converter with an analog magnetic pole orientation as in FIGS. 3 and 4, but here both functionally necessary ring gaps 16 are located outside the core zone 12 and none in it.
  • the magnetic ring 13 here consists of a composite of brass segments 26 and divided soft iron segments, in which individual magnets 24 are arranged between the soft iron segments.
  • the soft iron segments represent 24 pole shoes 27 for the individual magnets and together with them form the permanent magnet elements 14.
  • the toothed element ring 6 consists of a combination of toothed elements 7 made of soft iron and tooth gaps 8 made of brass. This toothed element ring 6 is welded onto a brass rotor disk 5 to form a cup-shaped composite.
  • the flat coil 11 is almost completely surrounded by a soft magnetic, two-part coil core 28, which represents a fixed magnetic flux element 21.
  • the magnetic ring 13 and the toothed element ring 6 engaging from above are located in its opening.
  • the two radial ones are in this arrangement Annular air gaps 16 between the toothed elements 7 and the magnetic ring 13 and between the toothed elements 7 and the coil core 28. Since both the coil core 28, the toothed element ring 6 and the magnetic ring 13 can be produced here as turned parts, very narrow, radial annular air gaps of a few ⁇ m can be realized. This is not possible in the arrangement of FIGS. 3 and 4 because of the planar shape of the individual magnets 24.
  • FIG. 6 shows the arrangement of FIG. 5 in the top view and in the intermediate position, in which the magnetic field lines 20 close in a short way.
  • FIG. 7 A further arrangement is shown in FIG. 7, in which only annular gaps 16 are located outside the core zone 12. Furthermore, curved permanent magnet elements 14 are used here, which are magnetized via their arc and are assembled with an alternating polarity sequence to form a magnetic ring 13. The magnetization via the arc causes both a magnetic north pole and a magnetic south pole to point in the axially different position in the radial direction towards the center of the energy converter. Two soft magnetic rotor disks 5 are pushed against a rotor shaft 3 and form the rotor 10 with them. As in FIGS. 3 and 4, a toothed element ring 6 is machined out of the rotor disks 5 on their outer circumference.
  • FIG. 7 shows an arrangement according to claim 5, in which two energy converters, similar to FIGS. 1 and 2, have a common rotor 10 with a common toothed element ring 6 and a common rotor disk 5. The advantage of this arrangement is that axial forces in particular can be compensated for.
  • the energy converter in FIG. 9 corresponds to the energy converter in FIG. 3, except that here the tooth elements 7 are angled relative to the rotor disk 5.
  • the toothed element wheel 9 is thus given a basket-shaped shape and permanent magnet elements 14 and toothed elements 7 can face each other at the annular air gap 18 over a larger area. With such an arrangement, a high energy conversion density is also possible when using permanent magnet materials with a low remanence induction, such as plastic-bonded permanent magnets.
  • FIG. 10 shows a forced operation between two energy converters 29 of the variant shown in FIGS. 3 and 4 via a coupling gearwheel 30.
  • the rotary movement and thus the mechanical energy is transmitted from the coupling gear 30 to the outside via an output shaft 31.
  • Both energy converters are accommodated in a common housing 32 and the output shaft 31 is mounted therein.
  • the crescent-shaped extension 33 at the head of the tooth elements 7 causes a start-up orientation due to different magnetic saturation states in the crescent-shaped extension 33 when the flat coil 11 is energized.
  • the start-up direction can also be differently shaped by asymmetrical chamfers, steps or sections in the form of spiral cutouts Operating principle to be determined.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

La miniaturisation de convertisseurs électrodynamiques provoque une diminution surproportionnelle du rendement de la conversion d'énergie. Un agencement fonctionnel particulier des éléments dans le convertisseur d'énergie permet d'intégrer pratiquement la totalité du volume de ce dernier dans le processus de conversion d'énergie. Des concentrations de flux et des fonctions multiples de différents composants permettent d'augmenter le rendement de la conversion d'énergie par rapport aux convertisseurs miniaturisés connus. Sous l'effet de la rotation d'une roue à éléments dentés (9), un flux magnétique variable est guidé par des aimants permanents (14) d'un anneau polarisé axialement en alternance (13) à travers une tige perforée (1), par l'intermédiaire de différents éléments de flux magnétique (21). Des circuits magnétiques (19) à orientation axiale-radiale entourent une bobine plate (11), placée sur la tige perforée (1), où ils exercent un effet d'induction. Le convertisseur d'énergie selon l'invention est conçu de manière simple et robuste, présente un rendement de conversion d'énergie élevé par rapport à son volume, et peut être produit au moyen de techniques de fabrication classiques. Il est possible de produire des convertisseurs même de très faible taille, présentant une puissance volumique élevée.
EP03717288A 2002-04-12 2003-04-09 Convertisseur d'energie electromecanique Withdrawn EP1497907A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10217285A DE10217285A1 (de) 2002-04-12 2002-04-12 Elektromechanischer Energiewandler
DE10217285 2002-04-12
PCT/EP2003/003701 WO2003088455A1 (fr) 2002-04-12 2003-04-09 Convertisseur d'energie electromecanique

Publications (1)

Publication Number Publication Date
EP1497907A1 true EP1497907A1 (fr) 2005-01-19

Family

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Family Applications (1)

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EP03717288A Withdrawn EP1497907A1 (fr) 2002-04-12 2003-04-09 Convertisseur d'energie electromecanique

Country Status (5)

Country Link
US (1) US20050242679A1 (fr)
EP (1) EP1497907A1 (fr)
AU (1) AU2003221564A1 (fr)
DE (1) DE10217285A1 (fr)
WO (1) WO2003088455A1 (fr)

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DE10217285A1 (de) 2003-11-06
WO2003088455A1 (fr) 2003-10-23
AU2003221564A1 (en) 2003-10-27
US20050242679A1 (en) 2005-11-03

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