Classifications

• • 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
  • H02K7/11—Structural association with clutches, brakes, gears, pulleys or mechanical starters with dynamo-electric clutches
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
  • H02K49/02—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type
  • H02K49/04—Dynamo-electric clutches; Dynamo-electric brakes of the asynchronous induction type of the eddy-current hysteresis type
• • 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
  • H02K7/1869—Linear generators; sectional generators

Definitions

• the invention relates to a device according to the preamble of claim 1, as can be seen from DE 26 42 682 C3.
• This relates to an arrangement for generating auxiliary electrical energy in a generator, which is on a vehicle, in particular a magnetic levitation vehicle, in driving connection with a Magnetpolrad which is moved without contact relative to a web-stationary motor part.
• This fixed motor part is an electrically conductive rail and in a direction of rotation freely movable Magnetpolrad is rotated during the relative movement of the vehicle relative to the rail contactless according to the principle of the induction clutch similar to a rolling wheel.
• the rotation is transmitted in the arrangement of the prior art to a transmission and further to a separate generator for generating power.
• the non-contact induction clutch is also a clean entrainment, in which the counter element such as the electrically conductive rail remains untouched.
• the object of the invention is to provide a device for contactless power generation of metal counter-elements with a predetermined relative movement between the device and the counter element, which allows a better use of the induction coupling and is more compact and easier to build.
• the device should be optimized in terms of performance with respect to different speeds, i.e. allow automatic adaptation to different speeds and thus achieve high efficiency even in different speed ranges.
• the device - as in the induction coupling according to the prior art - do without special embodiments of the counter elements.
• the object is achieved by a device according to claim 1.
• the device is characterized by the fact that it is low maintenance and resistant to external influences such as water, detergents, dirt or high humidity due to lack of mechanical friction.
• the device is by the universal mounting option in hard to reach places, especially in places where it is difficult to move an external power supply, as well as in places that are exposed to extreme external influences such as moisture or dirt, by the complete encapsulation very well Independent power supply to movable metal elements, for example for sensors, for signal transmission (radio, infrared) or suitable for the supply of lamps.
• a possible field of use are metallic conveyor chains, especially in the food industry, since there the power supply for sensors is waterproof and hygienically safe to implement.
• the use in or on garage or industrial doors and also in places with relative movement between metallic elements in machines or vehicles, such as gears for the collection and transmission of gear data is advantageous.
• the device is suitable for miniaturization, so that it can be used in very small devices for power generation.
• the magnet sequence is formed in an active position for generating at least one eddy current-based magnetic field in the conductive counter element, such that continuous continuous relative movement between the counter element and magnet sequence continuously induces opposing eddy current fields with mutually opposite magnetic fields in the counter element and thus the magnet sequence continuously is moved with the counter element.
• the current-conducting counter element is thus briefly magnetized and magnetically magnetically coupled to the magnet sequence comprising, for example, permanent magnets or electromagnets.
• the distance between the two parts magnet sequence and counter element is to be selected so small as the effective position that the magnetic field of the magnet sequence can induce sufficiently large eddy currents in the relative movement to the metallic counter element.
• the distances of more than 4 mm from the counter element can be readily maintained.
• these distances can also be set significantly lower or higher.
• the eddy currents induced in the current-conducting counter element generate temporary magnetic fields which are required for the magnetic interlocking of the two elements counter element and magnet sequence.
• a device operates without contact and is correspondingly quiet.
• the magnetic coupling is also independent of a reduced by moisture, dirt, ice or lubricants friction.
• the magnet string has a plurality of magnets and is mounted on a chain or band.
• the magnetic fields of the magnetic sequence generated by a plurality of magnets which can virtually intermesh with one another with the eddy current-based magnetic fields of the counter element, are preferably mounted in a circumferential direction about at least one rotary element.
• the magnet sequence may, for example, be pivotally mounted and movable against the force of a force accumulator.
• the magnet sequence is rotatable or rotatable about at least one axis, wherein the magnets are arranged with their north / south orientation radially to the axes of rotation.
• a regular one Structure of the magnetic fields of the magnet sequence is useful here for optimal power generation.
• the magnetic field lines of the magnets closest to the counter element penetrate this into operative positions and induce eddy current fields therein. This in turn generates magnetic fields.
• the magnetic field present in the direction of relative movement of the counter element then exerts a magnetic attraction force on the magnets, to which a force is thus exerted in the direction of relative movement of the counter element, resulting in a continuous rotation of the magnet sequence about its axes. Since adjacent magnets of the magnet sequence each have opposite polarities, this force is amplified by attraction or repulsion of the magnetic fields resulting from the induced by adjacent magnets eddy currents. In each case there is an attraction or repulsion of the previous magnetic field in the direction of relative movement of the counter element, so that the magnet sequence and the counter element are well coupled together to form an eddy current toothing.
• neodymium permanent magnets can be used whose magnetic field strength is in a range above 900 kA / m. These are sufficiently strong for small dimensions.
• flat, rectangular cuboids forming small size magnets can be placed on a chain with alternating feagnetagnetic and non-magnetic chain links.
• An advantageous neodymium magnet has edge lengths of 20 ⁇ 10 ⁇ 5 mm in the case of a mating element with an attack surface of 20 mm in height, but can also be limited to, for example, 5 ⁇ 2 ⁇ 1 mm with a correspondingly smaller distance to the mating element.
• Such a magnet chain or such a magnetic tape can then be tightly positioned (eg in a range of 2 mm to eg 10 mm) on the counter element in order to For example, in a metal rail eddy current-based magnetic fields and from the resulting movement of the magnetic sequence in at least one adjacent coil to generate a voltage or when the circuit is closed, a current.
• the device according to the invention has corresponding fastening elements for this purpose.
• This torque can be increased by supplementing each of the adjacent elements of the magnetic sequence on the counter element. If one chooses, for example, a magnet sequence with twice the number of magnets directly adjacent to the counter element, one achieves a doubling of the original torque to the magnet sequence.
• the magnet sequence moves at slow and moderate relative speeds up to about 6 m / s thereby almost identical to the relative speed between the counter element and the magnet sequence minus a minimum slip, which depends essentially on magnetic strength and distance.
• the speed of the magnet sequence in a saturation curve tends to a maximum value, which depends on the magnetic strength and distance.
• the device according to the invention may be provided with a winding which is part of a generator driven by the magnet sequence.
• the magnet sequence or its carrier band or carrier chain drives a shaft, which in turn is again equipped with magnets in order to generate a current in a generator of conventional type.
• coil windings are mounted directly in the region of the magnets of the magnet sequence, for example between the two opposing pairs of oppositely poled strands of a magnetic tape (2) or else a magnetic strand or a magnet rotor and in which thus during movement the magnetic sequence is induced a current.
• the coil and magnet string as a unit can be well encapsulated in a package, which is an essential feature of the invention for use under problematic external conditions.
• Simple and effective arrangement of coils have windings which, in the case of a 360 ° sweeping winding, form a plane extending substantially perpendicular to the adjacent magnetic ring strand.
• the device according to the invention builds up relatively small and can be arranged close to the counter element.
• Coil internal resistances and still sufficiently high voltages without transformation losses and correspondingly high efficiencies in different speed ranges by using multiple parallel coil windings For example, 2, 4 or 8 windings of the same length and the same cross-section are wound in parallel and connected in parallel or in series depending on the applied voltage during operation. A series connection of the multiple windings thus achieves the same resistance and the same voltage values as a simple winding with overall length of the combined windings and the same cross section.
• the parallel connection of k windings of equal cross-sectional area Q achieves the same resistance and same voltage values as a wire cross-sectional area winding k * Q.
• the device in parallel operation, can operate effectively in a high speed range with larger currents and by switching the windings in series connection as well Act effectively in a low speed range.
• the combination of series connections and parallel circuits of individual windings is possible to achieve a greater gradation.
• the switching between parallel and series connection is advantageously taken over by a separate circuit, which performs different circuit settings depending on the performance (for example based on the present voltage values) and thereby only itself has a negligible power consumption. It should be noted that the individual windings are each switched so that the same orientation is maintained both in series and in parallel connection.
• the device has an energy accumulator designed in particular as a capacitor and accumulator, the device being designed to store electrical energy during the operation of the device and for the subsequent delivery of the energy.
• the supply of independent circuits with different dimensions is advantageous, for example, to provide a rectified and thus lossy AC voltage to supply the energy storage to increase the efficiency in a secondary circuit, while the main circuit is supplied without rectification losses with an AC voltage.
• the additional circuit can be supplied with sufficient voltage above the forward voltage of a rectifier used in this case.
• the power storage is hereby fed and can be used at standstill of the system for bridging the power supply over a period of time.
• the device consisting of generator and consumer (for example, lighting element, sensor or radio transmission unit) can be completely encapsulated in a housing and thus configured to be extremely insensitive to external stresses.
• the device according to the invention is also provided with a support unit, by which the distance of the magnet sequence to the counter element can be varied.
• a further advantageous embodiment of the invention has a movably mounted arrangement of the carrier element of the magnet sequence within the housing, so that in relative movement between the device and counter element of that angle can be assumed with the largest possible power transmission to the magnet sequence.
• This is done automatically in a movable arrangement of the magnet sequence, because the magnetic fields of the counter-induced eddy currents exert magnetic attraction to the magnet sequence and this is thus pulled in existing relative movement in the position with a total minimum average distance between magnets of the magnet sequence and counter element.
• with possible displacements between the device and the counter element during operation is possible by means of the movable mounting a respectively optimally adapting positioning of the magnetic sequence to the counter element.
• An amplification of the coupling of counter element and rotor element can be produced by arranging corresponding magnet sequences on two opposite sides of the counter element, which in turn induce a current in associated coils.
• corresponding magnets the eddy currents induced in the counterelement can be amplified, which likewise leads to improved coupling.
• FIG. 1 is a perspective view of a device according to the invention in a partial view
• FIG. 2 is a perspective view of another device according to the invention in a partial view
• FIG. 1 is a detail view of the article of FIG. 1,
• FIG. 4 shows a further detail view of the article according to FIG. 1,
• the device according to the invention according to FIG. 1 has a counter element 1 which couples with a magnet sequence 2 rotatably mounted on two axes.
• the counter element 1 is designed as a straight conductive metal element, for example made of aluminum.
• the magnet sequence is mounted on a carrier 2a, which rotates around the axes of rotation 2e along a circularly rounded rectangle.
• a rectilinear movement in the direction V1 of the counter-element 1 causes a rectified movement of the magnet 2b occupied carrier 2a in the direction V2.
• the axes of rotation preferably run perpendicular to the direction of movement V1 of the counter element 1 and are preferably in a direction parallel to the counter element plane.
• the magnets of the magnet sequence 2 mounted on the carrier 2a have alternating polarities 2b / 2c.
• the magnet sequence 2 is in an active position for generating a plurality of eddy current-based magnetic fields in the counterelement 1.
• the coils 3, which surround the magnet sequence in the form of an air-core magnet a current flow is induced upon rotation of the magnet sequence.
• FIG. 2 shows an apparatus equivalent to FIG. 1, which is additionally completely encapsulated in a housing / box 2d to the outside, for example, against weather influences. No sensitive, moving parts are in direct contact with the environment.
• the air coils 3 are so between the opposite strands placed opposite the magnetic sequence, that there are always opposing magnetic poles at the two sides adjacent to the magnet sequence.
• Fig. 3 shows a further embodiment of a device according to the invention, wherein the magnetic carrier 2a is formed as a wheel.
• the structure becomes smaller, but the magnetic force applied to the counter element and thus the force transmission is lower than in the arrangement in FIG. 1.
• FIG. 4 shows a detailed view of a device according to the invention according to FIG. 3 with an additional circumferential air-core coil into which a current flow is induced when the magnet sequence rotates.
• the counter element is shown lying with the direction of movement V1.
• the magnet sequence 2 is occupied by permanent magnets 3b / 3c with alternating polarities and extends tangentially through an air gap on the counter element.
• the magnetic field lines 4a and 4b of the magnet closest to the counter element 1 penetrate this and induce oppositely directed eddy current fields 5a and 5b with resulting magnetic fields 6a and 6b.
• the front in the direction of movement of the counter element magnetic field 6a exerts a magnetically attractive effect and the rear magnetic field 6b in the direction of movement a magnetically repelling effect on the applied magnet, is thus exerted on the V2 in the direction of a force. This results in a rotational movement in the direction V2 of the magnet sequence 2.
• FIGS. 6, 7, 8 and 9 show a coil 1 with two parallel winding strands 2a and 2b.
• 6 shows the coil with two inner winding ends 1a and two outer winding ends 1b.
• 7 shows a coil cross section of the coil 1, wherein the winding strands 2a and 2b have the same cross section and the same orientation.
• Fig. 8 shows the parallel connection of the winding strands 2a and 2b, which in terms of resistance and voltage is equivalent to a simple winding corresponding to the cross-sectional sum area of 2a and 2b.

Landscapes

• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
• Non-Mechanical Conveyors (AREA)

Priority Applications (1)

Applications Claiming Priority (2)

Publications (2)

Family

ID=49080828

Family Applications (1)

Country Status (3)

Cited By (3)

Citations (1)

Family Cites Families (10)

• 2012
  • 2012-07-21 DE DE202012007030U patent/DE202012007030U1/de not_active Expired - Lifetime
• 2013
  • 2013-07-19 EP EP13753573.8A patent/EP2875569A2/fr not_active Withdrawn
  • 2013-07-19 WO PCT/EP2013/002147 patent/WO2014015968A2/fr not_active Ceased

Patent Citations (1)

Also Published As

Similar Documents

Legal Events