WO2024251784A1 - Accumulateur et dispositif de conversion d' energie - Google Patents
Accumulateur et dispositif de conversion d' energie Download PDFInfo
- Publication number
- WO2024251784A1 WO2024251784A1 PCT/EP2024/065420 EP2024065420W WO2024251784A1 WO 2024251784 A1 WO2024251784 A1 WO 2024251784A1 EP 2024065420 W EP2024065420 W EP 2024065420W WO 2024251784 A1 WO2024251784 A1 WO 2024251784A1
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- WIPO (PCT)
- Prior art keywords
- storage
- storage members
- axis
- members
- accumulator
- Prior art date
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
- H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
- H02K49/106—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with a radial air gap
-
- 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
- H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
- H02K7/1807—Rotary generators
- H02K7/1861—Rotary generators driven by animals or vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F6/00—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid
- F16F6/005—Magnetic springs; Fluid magnetic springs, i.e. magnetic spring combined with a fluid using permanent magnets only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
-
- 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
- H02K7/02—Additional mass for increasing inertia, e.g. flywheels
- H02K7/025—Additional mass for increasing inertia, e.g. flywheels for power storage
-
- 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
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/116—Structural association with clutches, brakes, gears, pulleys or mechanical starters with gears
Definitions
- the present invention relates to devices useful for storing energy and restoring it on demand, in particular for application within a vehicle, for example a bicycle.
- Energy production requires transforming, in particular into electrical and/or thermal and/or kinetic energy:
- a store of potential energy for example in the form of a fossil fuel, a high reservoir of water, a fissile material or a flywheel, in electrical or mechanical work, or in thermal energy, or
- flywheels Regarding the storage of potential energy in mechanical form, the only known high mass density energy storage mechanisms that could potentially be used in vehicles are flywheels. However, these have excessive mass and bulk that make them unsuitable.
- the transformation of a potential energy reserve in a vehicle is mainly carried out by means of internal combustion engines or electric motors.
- Electric motors partly overcome these drawbacks, for example being quieter or not requiring continuous operation even when the vehicle is stationary, but they have other drawbacks: battery charging time, limited autonomy, temperature rise of components during charging phases requiring cooling means which also consume energy, short battery life and difficulty in recycling, low efficiency at low temperatures, etc. There is therefore a need for a new device for storing and restoring energy, in particular by converting it, in particular with a view to moving a vehicle.
- the proposed invention aims to recover, store and restore energy in a mechanical form by means of a magnetic interaction.
- it proposes, contrary to what is currently known, a device capable of both driving the vehicle like a motor, and storing energy like a battery.
- the invention relates to an energy accumulator comprising first and second storage members spaced apart from each other by a fixed distance along an X axis, each of the first and second storage members comprising two magnets of reverse polarity along the X axis, at least one of the magnets of the first storage member magnetically interacting with at least one of the magnets of the second storage member in at least one configuration of the energy accumulator, and vice versa, the first and second storage members being movable relative to each other between a stable equilibrium configuration where the magnetic energy induced by the magnetic interaction between the magnets of the first and second storage members is minimal and at least one unstable configuration where the magnetic energy is greater than the magnetic energy in the stable configuration.
- the accumulator according to the invention stores energy in a magnetic form and restores it in a mechanical form by a simple relative movement of the first and second storage members relative to each other.
- the accumulator thus has an excellent efficiency between the quantity of energy that it is able to restore and the quantity of energy that it is able to store.
- Two magnets of "reverse polarity" along an axis are such that when traveling along said axis in one direction, one of the magnets first presents a south pole then a north pole while the other of the magnets first presents a north pole then a south pole.
- each magnet of the first storage member magnetically interacts with at least one of the magnets of the second storage member in at least one configuration of the energy accumulator, and vice versa. Numerous magnetic interactions between the different magnets of the groups thus take place, which thus makes it possible to increase the magnetic energy that can be stored by the accumulator.
- each magnet of the first storage member faces along the X axis a magnet of the second storage member of opposite polarity, and vice versa.
- the magnets of the first storage member are then arranged in pole opposition with the magnets of the second storage member and attract each other.
- the first and second storage members tend to return to the stable equilibrium configuration when they are moved relative to each other in an unstable configuration.
- each magnet of the first storage member is, preferably entirely, superimposed on a single magnet of the second storage member of opposite polarity in the stable equilibrium configuration, and vice versa.
- the first and second storage members may be arranged relative to each other in at least one unstable configuration.
- they may be arranged in a plurality of unstable configurations, one of the unstable configurations being an unstable equilibrium configuration in which the magnetic energy is at a maximum.
- each magnet of the first storage member faces along the X axis, preferably is fully superimposed, on a magnet of the second member of the same polarity, and vice versa.
- each magnet of the first storage member is superimposed on a single magnet of the second storage member of the same polarity, and vice versa.
- the first and second storage organs are preferably identical. This simplifies the design of the accumulator.
- the first and second storage members are preferably movable relative to each other in rotation about the X axis.
- the transition from the stable configuration to the unstable equilibrium configuration is carried out by a rotation less than or equal to 180° around the X axis.
- the first storage member and/or the second storage member may have the general shape of an X-axis disk.
- the first and second storage members preferably comprise a central hole of axis X passing through them from one side to the other.
- the accumulator may comprise a guide shaft of axis X comprising a portion of shape complementary to the central holes, the first and second storage members being engaged in rotation in the guide shaft.
- the magnets are arranged regularly around the X axis.
- the first storage member and/or the second storage member may comprise one or more pairs each formed of two magnets of reverse polarity along the X axis.
- the pairs of magnets of reverse polarity are arranged regularly around the X axis.
- first storage member and/or the second storage member may comprise two magnets of reverse polarity along the X axis, which are symmetrical to each other with respect to the X axis.
- the accumulator may comprise at least one, preferably several spacers arranged between the first and second storage members, in order to ensure that said storage members are maintained at a fixed distance.
- the spacer(s) may be in contact with the first and second storage members.
- the spacer(s) have the shape of a ball, which can thus roll freely on each of said storage members.
- the first and second storage members may each have a guide groove of a shape complementary to the spacer and in which the spacer is arranged.
- the groove may be of annular shape.
- the first storage member and/or the second storage member preferably comprise a support carrying the magnets, the support being diamagnetic, for example made of copper or brass, or paramagnetic, for example made of an aluminum or tungsten alloy.
- the support is preferably made of a material having a magnetic susceptibility which, in absolute value, is less than 10' 5 , in order to disturb as little as possible the magnetic interactions between the magnets of the first and second storage members.
- the support may comprise at least one housing each receiving at least one of the magnets.
- the magnets may cover one face of the support.
- magnets may be arranged in housings and other magnets may cover one face of the support.
- the support has as many housings as there are magnets, each magnet being arranged in one of the corresponding housings.
- the magnets of the first and second storage members are permanent magnets.
- at least one, preferably each, of the magnets of the first member and/or at least one, preferably each, of the magnets of the second member are neodymium magnets, in particular made of a material of formula NdiFeuB, the grade of which can be set according to the desired storage performances.
- the magnets of the first and second storage members may be identical.
- they have the shape of a plate, in particular a circular outline in the shape of a portion of a disk.
- At least 50%, preferably at least 90%, better still 100% of the surface area of the first storage member and/or at least 50%, preferably at least 90%, better still 100% of the surface area of the second storage member may be covered by the magnets.
- the accumulator comprises a first storage mechanism comprising several first storage members, in particular rigidly connected to each other, and a second storage mechanism comprising several second storage members, in particular rigidly connected to each other, the first storage mechanism and the second storage mechanism being interdigitated.
- a first storage mechanism comprising several first storage members, in particular rigidly connected to each other
- a second storage mechanism comprising several second storage members, in particular rigidly connected to each other, the first storage mechanism and the second storage mechanism being interdigitated.
- at least one, preferably each of the first storage members arranged between two adjacent second storage members interacts magnetically with said second storage members and vice versa. In this way, it is possible to consequently increase the magnetic energy storable in the accumulator.
- the first storage mechanism is configured such that the first storage members collectively rotate at the same speed about the X-axis and the second storage mechanism is configured such that the second storage members collectively rotate at the same speed about the X-axis.
- the support of at least one, preferably each of the first, respectively second, storage members comprises at least one housing which passes right through said support along the X axis, at least one of the magnets being arranged in the housing, the north pole of said magnet interacting with at least one of the magnets of a second, respectively first, storage member which faces said magnet and the north pole of said magnet interacting with at least one of the magnets of another second, respectively first, storage member which faces it along the X axis.
- a magnet of one of the first storage members interacts with the adjacent second storage members which it separates along the X axis.
- the accumulator is thus particularly compact.
- the support of at least one, preferably each of the first, respectively second, storage members comprises magnets arranged on one of its faces which interact with the magnets of the second, respectively first, storage members facing said face, and comprises other magnets arranged on its opposite face which interact with the magnets of another second, respectively first, storage members facing said opposite face.
- the distance measured along the X axis between each consecutive pair of first storage members is constant and/or the distance measured along the X axis between each consecutive pair of second storage members is constant.
- the distance between each pair formed by a first storage member and a second storage member contiguous thereto is constant.
- the first and second storage members which are each arranged at one of the ends of the accumulator comprise, on the side which is opposite the other storage members, a plate made of a ferromagnetic material.
- the plate is preferably made of a ferromagnetic material, which thus makes it possible to close the magnetic field and to avoid magnetic interactions with other members arranged at a distance from the accumulator and which are magnetically susceptible.
- the first storage mechanism may comprise a first spacer extending along an axis parallel to the X axis and on which the first storage members are fixed, the first spacer preferably being fixed on the radially outer face of each first storage member, and/or the second storage mechanism may comprise a second spacer extending along an axis parallel to the X axis and on which the second storage members are fixed, the second spacer preferably being fixed on the radially outer face of each second storage member.
- the first spacer may abut the second spacer in the stable equilibrium configuration and/or in the unstable equilibrium configuration.
- the first storage mechanism may be rigidly attached to an X-axis shaft and the second storage member is rotatably mounted about the X-axis, thereby optimizing the areas facing the first and second storage members.
- the invention relates to a device for converting mechanical energy into magnetic energy and vice versa, the device comprising:
- the first and second storage members being movable in rotation around the X axis
- a transmission mechanism comprising a main transmission shaft and first and second secondary transmission shafts, a differential for distributing the rotational speed of the main transmission shaft to each of the first and second secondary transmission shafts,
- control mechanism comprising a continuously variable power transfer mechanism comprising first and second control shafts in rotational cooperation with each other, the ratio between the rotational speed of the first control shaft and the rotational speed of the second control shaft being adjustable, the first storage member, the first secondary transmission shaft and the first control shaft being in rotational cooperation with each other, and the second storage member, the second secondary transmission shaft and the second control shaft being in rotational cooperation with each other.
- the conversion device when the accumulator has stored magnetic energy, adjusting the ratio of the rotational speed of the first drive shaft to the rotational speed of the second drive shaft allows the stored energy to be returned to the distribution shaft in mechanical form.
- the conversion device then acts as a motor.
- the control mechanism can constrain the differential and thus force the movement of the first and second storage members from the stable configuration to an unstable configuration to store energy.
- the conversion device then acts as a battery.
- the device comprises first and second transmission reducers so that the rotational speed of the first storage member and the rotational speed of the second storage member respectively are each lower than the rotational speed of the transmission shaft.
- first and second transmission reducers so that the rotational speed of the first storage member and the rotational speed of the second storage member respectively are each lower than the rotational speed of the transmission shaft.
- the first transmission reducer and the second transmission reducer may have the same gear ratio.
- the first transmission reducer and/or the second transmission reducer may be a cylindrical gear reducer.
- the first transmission reducer and/or the second transmission reducer comprise epicyclic gear trains, in particular of X axis.
- the device may further comprise a first control reducer so that the rotation speed of the first storage member is lower than the rotation speed of the first control shaft and/or a second control reducer so that the rotation speed of the second storage member is lower than the rotation speed of the second control shaft.
- the reduction of the first and second drive reducers may be less than the reduction of the first and second transmission reducers.
- a low number of rotational revolutions of the first and second drive shafts commands allow the angular offset between the first and second storage organs to be modified.
- the first drive reducer and the second drive reducer may have the same gear ratio.
- the first drive reducer and/or the second drive reducer may be a cylindrical gear reducer.
- the first transmission reducer and/or the second transmission reducer are epicyclic gear trains, in particular of X axis.
- the device may comprise first and second collectors in rotational cooperation with the first and second storage members respectively.
- the first collector can be meshed with the first transmission reducer and the first control reducer and the second collector can be meshed with the second transmission reducer and the second control reducer.
- the first storage member may comprise a first annular X-axis serration, the first collector comprising a pinion meshed in the first serration and/or the second storage member may comprise a second annular X-axis serration, the second collector comprising a pinion meshed in the second serration.
- the power transfer mechanism may be a progressive transmission device, for example chosen from a variator with a trapezoidal power transfer member, in particular a variator with a trapezoidal belt, and a toroidal variator, in particular with concurrent axes or coaxial disks.
- the transfer mechanism is a variator with a trapezoidal power transfer member, which advantageously makes it possible to transfer a large amount of power from the first to the second drive shaft and vice versa, thanks to the trapezoidal power transfer member.
- the invention also relates to a vehicle, in particular chosen from a car, a motorcycle, a truck, a construction machine, an agricultural machine, a heavy load transport cart and a bicycle, comprising an accumulator according to the invention or a device according to the invention.
- a vehicle in particular chosen from a car, a motorcycle, a truck, a construction machine, an agricultural machine, a heavy load transport cart and a bicycle, comprising an accumulator according to the invention or a device according to the invention.
- the vehicle is a bicycle.
- the drive shaft of the device is in rotational cooperation with a shaft of a drive wheel of the vehicle.
- the drive shaft of the device may be a shaft of a wheel of the vehicle.
- FIG. 1 is a perspective view of an example of an accumulator according to the invention.
- FIG. 2 schematically illustrates the operation of a variant of the accumulator example of Figure 1;
- FIG. 3 is a schematic top view of an exemplary device according to the invention.
- FIG. 4 is a schematic front view of a continuously variable power transfer mechanism implemented in the device illustrated in Fig. 3;
- FIG. 5 is a schematic top view of another example of a device according to the invention.
- FIG. 6 is a perspective view of part of the device illustrated in Fig. 5;
- Figures 1 and 2 illustrate an example of an accumulator according to the invention.
- the accumulator comprises a first storage member 2 and a second storage member 3 which are each rotatable about an axis X.
- the first and second storage members are furthermore rotatable relative to each other around the X axis.
- the first and second storage members are identical, so that the description of one of the first storage members given below is applicable to the second storage member.
- Said storage organ comprises a support 4 and several pairs of magnets 13 of reverse polarity along the X axis.
- the support 4 has the shape of a disc pierced in its center, a holding shaft 30 of axis X passing through the support 4 from side to side in its thickness.
- the support also has holes 31 which pass through its thickness.
- the holes are of circular outline with an axis parallel to the X axis and are distributed regularly from each other around the X axis.
- the bracket in Figure 1 has 6 holes spaced at 60° from each other around the X axis while the bracket shown in Figure 2 has 4 holes spaced at 90° from each other around the X axis.
- the magnets 13 are housed in the holes 31, for example force-fitted. They are distributed in alternating poles around the X axis, i.e. by running along the support around the X axis, a magnet “NS” is consecutively followed by a magnet “SN”.
- the support 4 also has a radially outer serrated face 32.
- the accumulator illustrated in FIG. 5 comprises a first storage mechanism 38 comprising several first storage members 2 and a second storage mechanism 39 comprising several second storage members.
- the first and second storage mechanisms are arranged alternately and are thus interdigitated.
- the first and second storage members are arranged alternately in pairs along the X axis. Thus, by traveling along the X axis in one direction, except for the storage members arranged at the ends of the accumulator along the X axis, each second storage member is arranged between two adjacent first storage members and vice versa.
- the first storage members and the second storage members are each driven in rotation about the X axis by means of a first collector shaft 40 and by means of a second collector 41 respectively which are each rotatable about an axis parallel to the X axis.
- the first collector and the second collector carry pinions 43 which are each engaged in the radially outer toothed part 32 of a first storage member and a second storage member respectively.
- the first and second storage members can thus be arranged, as illustrated in FIG. 2 a), according to a first stable equilibrium configuration according to which the magnets 13 of the first storage member are each arranged along an axis parallel to the axis X opposite a magnet 17 of reverse polarity along the axis X of the second storage member.
- each “SN” magnet of the first storage member is fully axially superimposed on an “SN” magnet of the second storage member and vice versa
- each “NS” magnet of the first storage member is fully axially superimposed on an “NS” magnet of the second storage member and vice versa.
- the springs opposite along the X axis have poles that attract each other.
- This stable equilibrium configuration corresponds to that where the magnetic energy in the accumulator is minimal and for which the accumulator has not stored any energy.
- Relative rotation of the first and second storage members moves the magnets of the first and second storage members relative to each other in a direction transverse to the X-axis to different unstable configurations depending on the angle of rotation of the first storage member relative to the second storage member.
- a magnet of the first storage member is at least partially superimposed with a magnet of the same polarity and optionally with a magnet of reversed polarity along the X axis, as can be observed in Figure 2 b).
- the accumulator can be arranged in an unstable equilibrium configuration by a relative rotation of an angle of 90° about the X axis between the first and second storage members.
- the magnets of the first storage member are each arranged along an axis parallel to the X axis opposite a magnet of the same polarity along the X axis of the second storage member.
- each “SN” magnet of the first storage member is fully axially superimposed on an “NS” magnet of the second storage member and vice versa
- each “NS” magnet of the first storage member is fully axially superimposed on an “SN” magnet of the second storage member and vice versa.
- the springs opposite each other along the X axis repel each other, generating a high electromagnetic force between them.
- This unstable equilibrium configuration illustrated in FIG. 2 c) is that where the magnetic energy in the accumulator is at a maximum.
- the first and second members comprise four or six magnets. This number is however not limiting and can be higher or lower, without this modifying the energy storage capabilities of the accumulator.
- the magnets are arranged regularly and in alternating polarity around the X axis.
- the accumulator according to the invention makes it possible to store a high mass density of energy by a small relative displacement of the first storage member in relation to the second storage member.
- Figure 3 illustrates a first example of a device 50 according to the invention for converting mechanical energy into magnetic energy and vice versa.
- the device comprises an energy accumulator 1 according to the invention as described in FIGS. 1 and 2, a transmission mechanism 52 and a control mechanism 54 which are kinematically linked to each other.
- the transmission mechanism 52 comprises a main transmission shaft 55, first 56 and second 57 secondary transmission shafts and a differential 58.
- the main transmission shaft 55 is for example in rotational cooperation, direct or indirect, with an output shaft of an engine or a rotation shaft of a wheel of a vehicle.
- the distribution shaft transmits mechanical energy intended to be stored by the accumulator 1 in magnetic form or recovers mechanical energy produced by the release of the magnetic interaction energy between the magnets of the accumulator.
- the accumulation or restitution of the magnetic interaction energy is controlled by the control mechanism 54.
- the differential 58 is configured to distribute the rotational speed of the main drive shaft 55 to each of the first 56 and second 57 secondary drive shafts.
- the conversion device 50 comprises first 58 and second 59 collectors which are in rotational cooperation with the first 2 and second 3 storage members respectively.
- the first and second collectors comprise first 60 and second 61 collector shafts carrying first 62 and second 63 collector gears.
- each of the first collector pinions 62 is meshed with a toothing carried by the radially outer face 64 of the support of a corresponding first storage member 2 and each second collector pinion 63 of the second collector is meshed with a toothing 65 carried by the radially outer face of the support of a corresponding second storage member 3.
- the transmission mechanism 52 comprises a first transmission reducer 70 which is arranged between the first transmission shaft 56 and the first collector 58. It further comprises a second transmission reducer 71 which is arranged between the second transmission shaft 57 and the second collector 59.
- the transmission mechanism 52 is adapted so that the rotational speed of the first storage member 2 and the rotational speed of the second storage member 3 respectively are each lower than the rotational speed of the main transmission shaft 55. In this way, it is ensured that a large number of rotations of the main distribution shaft 55 results in a low relative rotation of the first and second storage members relative to each other.
- the first 70 and second 71 transmission reducers of the illustrated example are cylindrical gear reducers. However, other types of reducers can be considered.
- the control mechanism 54 comprises a continuously variable power transfer mechanism 80 comprising first 81 and second 82 control shafts in rotational cooperation with each other.
- the ratio of the rotational speed of the first control shaft to the rotational speed of the second control shaft can be adjusted by the user of the device, in order to cause an accumulation or a restitution of energy.
- the variator with trapezoidal power transfer member may comprise first 83 and second 84 plates fixed to the first 81 and second 82 control shafts and axes merged with the respective axes of the first and second control shafts.
- the first and second plates rotate a power transfer member 85, for example a belt or a track, by their radially outer faces 86, 87.
- the power transfer member is inextensible and of constant length as well as the distance between the centers of the first and second plates.
- the variator is configured to have that the first and second plates have diameters which can vary jointly to maintain a substantially constant tension and length in the belt.
- the speed of the first collector 58 is lower, respectively higher than the speed of the second collector 59.
- the first storage members then rotate less quickly, respectively faster, than the second storage members.
- the rotation speed of a first storage member relative to a second storage member is then negative, respectively positive. In this way, it is thus possible to move the first and second storage members between a stable equilibrium configuration and an unstable equilibrium configuration in order to store magnetic energy in the accumulator or to restore it.
- the device further comprises a first control reducer 88 arranged between the first control shaft and the first collector and a second control reducer 99 arranged between the second control shaft and the second collector.
- the accumulator comprises spacers 90 in the form of balls housed in annular grooves of complementary shape, arranged on the faces of the supports opposite the first and second storage members.
- FIG 5 illustrates another example of an energy conversion device according to the invention, which differs from the device illustrated in Figures 3 and 4 in particular by the following differences.
- the first 56 and second 57 transmission shafts comprise transmission pinions 92 which are meshed with input pinions 93 carried by each of the first 81 and second 82 control shafts.
- the conversion device 50 may comprise first and second transmission reducers. arranged between the first transmission shaft and the first drive shaft on the one hand and between the second transmission shaft and the second drive shaft on the other hand.
- first and second transmission shafts carry output pinions 94 which are respectively meshed with first 70 and second 71 transmission reducers which are in rotational cooperation with the first 2 and second 3 storage members respectively.
- the first and second transmission reducers are first and second X-axis epicyclic gear sets.
- Each epicyclic gear train comprises a planetary pinion 96 with an X axis, a planet carrier 97 with an X axis and planet pinions 98 with an axis parallel to the X axis arranged between the planetary pinion and the planet carrier and meshed on the planet pinion and on the planet carrier.
- the planet pinions rotate about the X axis and about their axis parallel to the X axis, and cause the planet carrier to rotate about the X axis, the rotation speed of the planet carrier about the X axis being lower than the rotation speed of the planetary pinion.
- the satellite carrier 98 of the first epicyclic gear train comprises a first collector shaft 100 arranged at its radial periphery and which extends axially while carrying pinions 101 which are each meshed with the external teeth of a first storage member 2.
- the satellite carrier of the second epicyclic gear train comprises a second collector shaft 102 of axis X which carries pinions 103 each arranged in a central hole of axis X of a corresponding second storage member 3 and which is meshed on a toothing carried by the radially inner face of the hole.
- the satellite carrier of the first epicyclic gear train comprises a first spacer 104, respectively a second spacer 105, fixed to its radial periphery and which extends axially.
- the first spacer respectively the second spacer, is fixed on the radially outer face of each of the first 2, respectively second 3, storage members, in order to move them collectively in rotation about the X axis.
- Example An example of the dimension of an accumulator according to the invention is illustrated below, a component of a restitution device intended to be integrated into a bicycle, the main distribution shaft being, for example, the shaft of a wheel of the bicycle.
- the accumulator of the type illustrated in Figures 1, 2 and 6, comprises 25 storage members, each comprising a support in the form of a disk with a thickness of 3 mm and a diameter of 100 mm.
- the storage members are arranged in a cubic box with a side of 10 cm.
- the storage organs are arranged alternately along an axis X around which they are movable in rotation.
- the supports are spaced from each other along the X axis by a distance of 1 mm.
- Each support carries two neodymium magnets of type N52 of opposite polarity capable of exerting with a similar magnet a surface force f s of 50 N/cm 2 . Assuming that the magnets cover the entire surface of a support, the total power P that can be generated by the magnetic interactions in the accumulator by rotation of half a turn is calculated according to the formula:
- N the number of interactions between the disks of the system, equal to 48, considering that each disk interacts with two adjacent disks except the extreme disks, and
- S is the area of each disk, i.e. 78.5 cm2,
- L is the perimeter of a disk, equal to 15.7 cm.
- the maximum power from magnetic interactions that can be generated is about 29.5 kJ.
- the invention provides an accumulator and a conversion device which are compact and can be easily arranged within a drive train of a vehicle. Furthermore, the accumulator makes it possible to accumulate a high mass density of magnetic energy and to convert it into mechanical energy immediately, by a simple command of the user.
- the conversion device may comprise an activator mechanism, for example a lever fixed on the handlebar or the frame of the bicycle, connected to the control mechanism, the user actuating the activator mechanism to control the storage or restitution of energy by the accumulator.
- an activator mechanism for example a lever fixed on the handlebar or the frame of the bicycle, connected to the control mechanism, the user actuating the activator mechanism to control the storage or restitution of energy by the accumulator.
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Abstract
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Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP24731334.9A EP4725102A1 (fr) | 2023-06-06 | 2024-06-05 | Accumulateur et dispositif de conversion d' energie |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2305660A FR3149739A1 (fr) | 2023-06-06 | 2023-06-06 | Accumulateur et dispositif de conversion d’énergie |
| FRFR2305660 | 2023-06-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024251784A1 true WO2024251784A1 (fr) | 2024-12-12 |
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ID=87801186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2024/065420 Ceased WO2024251784A1 (fr) | 2023-06-06 | 2024-06-05 | Accumulateur et dispositif de conversion d' energie |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP4725102A1 (fr) |
| FR (1) | FR3149739A1 (fr) |
| WO (1) | WO2024251784A1 (fr) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019053675A2 (fr) * | 2017-09-15 | 2019-03-21 | DE Innovation Lab Limited | Agencement de freinage régénératif pour véhicules électriques |
| US20200386289A1 (en) * | 2019-01-09 | 2020-12-10 | Green Wave Power Systems Llc | Magnetically-coupled torque-assist apparatus |
| CN114679027A (zh) * | 2022-05-27 | 2022-06-28 | 华中科技大学 | 一种多盘式轴向磁通储能调相机 |
-
2023
- 2023-06-06 FR FR2305660A patent/FR3149739A1/fr active Pending
-
2024
- 2024-06-05 EP EP24731334.9A patent/EP4725102A1/fr active Pending
- 2024-06-05 WO PCT/EP2024/065420 patent/WO2024251784A1/fr not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019053675A2 (fr) * | 2017-09-15 | 2019-03-21 | DE Innovation Lab Limited | Agencement de freinage régénératif pour véhicules électriques |
| US20200386289A1 (en) * | 2019-01-09 | 2020-12-10 | Green Wave Power Systems Llc | Magnetically-coupled torque-assist apparatus |
| CN114679027A (zh) * | 2022-05-27 | 2022-06-28 | 华中科技大学 | 一种多盘式轴向磁通储能调相机 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP4725102A1 (fr) | 2026-04-15 |
| FR3149739A1 (fr) | 2024-12-13 |
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