WO2023025480A1 - Entraînement électrique - Google Patents

Entraînement électrique Download PDF

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Publication number
WO2023025480A1
WO2023025480A1 PCT/EP2022/070355 EP2022070355W WO2023025480A1 WO 2023025480 A1 WO2023025480 A1 WO 2023025480A1 EP 2022070355 W EP2022070355 W EP 2022070355W WO 2023025480 A1 WO2023025480 A1 WO 2023025480A1
Authority
WO
WIPO (PCT)
Prior art keywords
cores
line
magnetic
pole shoes
drive
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.)
Ceased
Application number
PCT/EP2022/070355
Other languages
German (de)
English (en)
Inventor
Karl KUMPITSCH
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.)
ALMAK VERTRIEB GmbH
Original Assignee
ALMAK VERTRIEB 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 ALMAK VERTRIEB GmbH filed Critical ALMAK VERTRIEB GmbH
Priority to EP22754838.5A priority Critical patent/EP4393053A1/fr
Publication of WO2023025480A1 publication Critical patent/WO2023025480A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
    • H02K21/18—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures having horse-shoe armature cores
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/14—Stator cores with salient poles
    • H02K1/141—Stator cores with salient poles consisting of C-shaped cores
    • H02K1/143—Stator cores with salient poles consisting of C-shaped cores of the horse-shoe type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/17—Stator cores with permanent magnets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • H02K1/246—Variable reluctance rotors
    • 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

Definitions

  • the invention relates to an electric drive according to the preamble of patent claim 1 .
  • Electric drives are known in which a first drive part is moved relative to a second drive part.
  • magnetic fluxes are generated in a first drive part by means of permanent magnets, which are then controlled by means of coils in order to generate a time-varying magnetic field, which then drives the second drive part.
  • the permanent magnets are usually arranged in such a way that a change in the magnetic field at the pole shoes also leads to a change in the magnetic field strength within the permanent magnets, which are made of a hard magnetic material. This leads to power losses. Furthermore, the permanent magnets are exposed to high thermal loads and maintenance is very complex.
  • the object of the invention is therefore to specify an electric drive of the type mentioned at the outset, with which the disadvantages mentioned can be avoided and which is simple in construction and reliable but nevertheless has a high level of efficiency.
  • the change in the magnetic field strength thus takes place predominantly in the soft-magnetic core and not in the hard-magnetic permanent-magnetic intermediate parts, as a result of which the magnetic losses are kept low. Furthermore, the heating occurs mainly in the cores and not in the permanent magnetic intermediate parts.
  • FIG. 1 shows parts of a first preferred embodiment of an electric drive, with a detail of the first drive part being shown on the left and a detail of the second drive part on the right, each in an oblique view;
  • FIG. 3 shows parts of a second preferred embodiment of an electric drive, a detail of the first drive part being shown in an oblique view at the top and a detail of the second drive part being shown in a side view at the bottom;
  • 5 shows parts of a third preferred embodiment of an electric drive, part of the second drive part being shown as a section between two parts of the first drive part in an oblique view; 6 shows a detail of the second drive part of the third preferred embodiment in top view; and
  • FIG. 7 shows parts of a fourth preferred embodiment of an electric drive, with part of the second drive part being shown in section next to part of the first drive part in an oblique view.
  • each core 4 has a first leg 5 with a first pole shoe 6 and a second leg 7 with a second pole shoe 8, that the first pole shoes 6 of the cores 4 are arranged along a first line and the second pole shoes 8 of the cores 4 along a , are arranged at a distance from the first line, that permanent-magnetic intermediate parts 9 are arranged between adjacent cores 4 for magnetizing the cores 4, that the pole shoes 6, 8 of the same ferromagnetic core 4 have the same magnetic polarity, that adjacent first pole shoes 6 have magnetically opposite polarity , and that at least one of the cores 4 the first leg 5 has a first coil arrangement 10, and the second leg 7 has a second coil arrangement 11.
  • an electric drive 1 can be provided in the sense of a magnetic flux switching machine, which has a lower power loss and is nevertheless constructed simply and reliably.
  • the magnetic flux in the cores 4 can therefore optionally be divided between the two pole shoes 7.8 and oscillate between the pole shoes 7.8 in time.
  • Permanent magnets and their direction of magnetization are indicated by an arrow running from the south pole to the north pole. Furthermore, the letters N and S indicate the magnetic north pole and south pole.
  • the electric drive 1 is intended to move the first drive part 2 relative to the second drive part 3 when the two coil arrangements 10, 11 are supplied with current. Provision is particularly preferably made for the first drive part 2 to be fixed, ie designed as a stator, and for the second drive part 3 to be movably mounted on the first drive part 2, ie in particular designed as a rotor.
  • the electric drive 1 can be designed in particular as an electric motor. As with other electric motors, the electric drive 1 can also be used as a generator in some embodiments. The electric drive 1 can therefore alternatively also be referred to as an electric machine.
  • the first drive part 2 comprises a predeterminable number of ferromagnetic cores 4.
  • the predeterminable number can in particular be at least two, preferably at least four, particularly preferably at least ten.
  • the cores 4 can be arranged in a row, in particular, with the permanent-magnetic intermediate parts 9 being arranged between two cores 4 .
  • the cores 4 are designed in such a way that they have two legs 5.7, which each have their own pole shoe 6.8 at their ends.
  • the cores 4 can therefore alternatively also be referred to as twin cores.
  • the cores 4 are arranged in such a way that the first pole shoes 6 of the cores 4 are arranged along the first line and the second pole shoes 8 of the cores 4 are arranged along the second line, with the two lines being spaced apart from one another.
  • a sequence of first pole shoes 6 is therefore arranged along the first line, while a sequence of second pole shoes 8 is arranged along the second line.
  • the first line and the second line are only imaginary lines along which the respective pole shoes 6.8 are lined up.
  • the first line and the second line can be straight or curved.
  • the cores 4 are further magnetized by permanent-magnetic intermediate parts 9 .
  • the intermediate parts 9 and their direction of magnetization are arranged in such a way that the pole shoes 6.8 of the same core 4 have the same polarity, so that in a core 4 both pole shoes 6.8 form either a north pole or a south pole.
  • the pole shoes 6.8 of one of the cores 4 are of opposite polarity to the pole shoes 6.8 of the adjacent cores 4.
  • the cores are therefore magnetized by the intermediate parts 9 in such a way that a core 4, in which both pole shoes 6.8 form a north pole, another core 4 follows, in which both pole shoes 6.8 form a south pole, and the following core 4 again has two pole shoes 6.8 designed as a north pole.
  • This magnetization can take place in particular in that, in at least one of the cores 4, two intermediate parts 9 of the same polarity initiate the magnetic field in an area between the two coil arrangements 10,11. As a result, a particularly strong permanent magnetic field can be generated.
  • At least one of the cores 4 introduces its magnetic field in a region between the two coil arrangements 10, 11 only on one side of one of the intermediate parts 9.
  • the intermediate parts 9 can in particular be arranged in such a way that every second gap between the cores 4 is free of intermediate parts 9 .
  • Such an arrangement manages with fewer permanent magnets overall.
  • the permanent-magnetic intermediate parts 9 can be made of NdFeB in particular.
  • Other permanent magnets of the electric drive 1 can also be made of NdFeB.
  • the pole shoes 6.8 of one of the cores 4 each have their own main magnetic flow direction.
  • the direction that results from the sum of all magnetic field lines that leave the respective pole shoe 6.8 is referred to as the main magnetic flux direction.
  • the main magnetic flux directions of the pole shoes 6 , 8 are preferably directed towards the second drive part 3 .
  • the main magnetic flux directions of the pole shoes 6.8 are preferably normal to the first line and the second line.
  • the first leg 5 has a first coil arrangement 10 and the second leg 7 has a second coil arrangement 11 .
  • the coil assemblies 10, 11 can in particular be wound around the respective leg 5.7.
  • the coil assemblies 10,11 can also be arranged within the respective legs 5,7.
  • the task of the coil assemblies 10, 11 is to strengthen or weaken the magnetic flux in the respective legs 5.7, and thus also in the respective pole shoes 6.8.
  • the cores 4 with the coil arrangements 10, 11 can in particular be arranged in such a way that the magnetic flux in the two legs 5, 7 is the same, provided the coil arrangements 10, 11 are not energized. In this case, the same magnetic field also acts on the second drive part 3 along the first line and the second line.
  • the magnetic flux in the intermediate parts 9 changes only as a result of the difference between the two magnetic fluxes induced by the coil arrangements 10, 11. If both coil arrangements 10, 11 induce the same strength but opposite magnetic flux, the magnetic flux in the intermediate parts 9 is unchanged.
  • the cores 4 are preferably made of a soft-magnetic material with high flux conductivity, ie a material with a low coercive field strength and high permeability. These can be bundles of insulated electrical steel or of soft magnetic powder composite material, so-called SMC.
  • the soft-magnetic material can guide the magnetic flux impressed by the permanent-magnetic intermediate parts 9 and the coil arrangements 10,11 three-dimensionally and with little loss into the ends of the legs 5,6 designed as pole shoes 6,8. It is also easy to manufacture them in series and thus to realize precise, complicated, three-dimensional shapes with additional functions such as positioning and connecting bars, ducts and cooling channels.
  • the pole shoes 6.8, hence the pole shoe-shaped ends of the legs 5.7, can also be referred to as stator poles.
  • the electric drive 1 is therefore designed as a rotating electric motor. This enables a simple construction.
  • the electric drive 1 can also be designed as a linear motor.
  • the second drive part 3 can in particular be an internal rotor, ie it can be surrounded by the first drive part 2 .
  • first pole shoes 6 form a first stator ring and the second pole shoes 8 form a second stator ring.
  • the magnetic lines can be kept particularly short.
  • Substantially parallel also includes a slightly oblique arrangement of a part of the intermediate parts 9, as indicated in FIG. 3, for example. With respect to the axis of rotation 18, the intermediate parts 9 can be magnetized essentially tangentially.
  • the pole direction of the permanent-magnetic intermediate parts 9 can change after each core 4, so that an arrangement can easily be achieved in which the pole shoes 6.8 of adjacent cores 4 have opposite polarity to one another.
  • the base area 12 is in this case that area which connects the two legs 5.7 to one another. By introducing a magnetic field into the base area 12, the two pole shoes 6.8 are also designed with the same polarity.
  • the base area 12 can also be referred to as a connection plate or yoke.
  • a further permanent magnet 19 which is magnetized radially to the axis of rotation 18, to be arranged on the base region 12 and into which the permanent-magnetic intermediate parts 9 introduce their magnetic field.
  • a further permanent magnet 19 which is magnetized radially to the axis of rotation 18, to be arranged on the base region 12 and into which the permanent-magnetic intermediate parts 9 introduce their magnetic field.
  • the base area 12 ensures that the magnetic fields are transferred from one of the legs 5.7 to the other leg 5.7.
  • This arrangement has the advantages of simpler construction.
  • two possible arrangements of the base area 12 are indicated simultaneously by way of example.
  • an arrangement of the base area 12 is drawn in as a hatched area between the intermediate parts 9 .
  • the possibility of arranging the base area 12 outside of the connection between the intermediate parts 9 is also shown.
  • the cores 4 can be C-shaped and/or egg-shaped. As a result, the cores 4 can be designed in a correspondingly compact manner.
  • the main magnetic flux directions of both pole shoes 6.8 can be aligned in the same direction.
  • the main magnetic flux directions of both pole shoes 6.8 can be aligned in opposite directions.
  • the two legs 5.7 can preferably have essentially the same cross section.
  • the crossed circuit means that the first coil arrangement 10 carries the current in an opposite sense of rotation compared to the second coil arrangement 11 is passed through. With the same number of turns, two magnetic fluxes of exactly the same size but opposite ones can easily be generated in the legs 5.7. This arrangement results in the same electrical resistance in both streams.
  • the first coil arrangement 10 and/or the second coil arrangement 11 can be part of an electrical resonant circuit.
  • both coil arrangements are part of the same electrical oscillating circuit.
  • a control of the electric drive 1 can be achieved in a particularly simple manner by means of an electric resonant circuit, in particular a driven electric circuit.
  • the resonant frequency of the oscillating circuit in particular can specify the speed and the speed can be controlled by controlling the resonant frequency.
  • high current intensities for operating the coil arrangements 10, 11 can be provided by the resonant circuit.
  • the resonant circuit can preferably be operated with a sine load curve.
  • the cores 4 can only be provided for a magnetic bearing or improved running smoothness.
  • the design of the first drive part 2 can interact with differently designed second drive parts 3 .
  • the second drive part 3 has a first region 13 that interacts with the first pole shoes 6 and a first region 13 with the second pole shoes 8 interacting with the second region 14, the first region 13 and the second region 14 each having a structure with periodically changing magnetic properties, and that the structure of the first region 13 is offset, in particular offset by half a period length, to the structure of the second region 14 is arranged.
  • the first area can be referred to as the first rotor ring and the second area 14 as the second rotor ring.
  • the second drive part 3 can also be referred to as a twin rotor.
  • the periodically changing magnetic properties mean that when the second drive part 3 moves relative to the first drive part 2, the magnetic properties change periodically, for example by changing the magnetic reluctance and/or the local magnetization of the second drive part 3.
  • the first area 13 is formed offset to the second region 14, preferably by half a period length of the periodically changing magnetic properties of the structure.
  • the first region 13 could therefore also be regarded as being phase-shifted with respect to the second region 14 in the direction of rotation.
  • the structure of the two areas 13, 14 can in particular be identical. If the coil arrangements 10,11 are not energized, neither of the two areas 13,14 is preferred in the interaction with the first drive part 2. If the magnetic flux is strengthened in the first pole shoes 6 and weakened in the second pole shoes 8, the interaction with the first area 13 predominates, while the interaction with the first area 14 predominates when the current flow is reversed.
  • the electric drive 1 can be designed in particular as a stepping motor.
  • first region 13 and the second region 14 each at least partially have a structure with permanent magnets 15 of alternating polarity.
  • the first area 13 and the second area 14 can therefore each have a structure with an alternating north pole and south pole.
  • a pair of a north pole and a south pole can form one period of construction of the first region 13 or the second region 14 .
  • these poles can also be used as rotor poles be designated. Due to the staggered arrangement, a chessboard-like arrangement of magnetic poles can therefore be arranged, as can be seen by way of example in FIGS. 3 and 6 . In Figs.
  • the poles in the first area 13 are identified with capital letters, hence N and S, and the poles in the second area are identified with lower case letters, therefore n and s, for better distinguishability.
  • N and S capital letters
  • n and s lower case letters
  • the permanent magnets 15 of opposite polarity of the two areas 13, 14 interact with the two pole shoes 6, 8 of the same polarity, then if the coil arrangements 10, 11 are not energized, the repulsive effect on one permanent magnet 15 becomes the attractive effect on the other permanent magnet 15 be the same size. Only when the coil arrangements 10, 11 are energized will the attractive effect on one or the other permanent magnet 15 predominate, depending on the direction of the energization.
  • a gap is arranged between the first drive part 2 and the second drive part 3 .
  • the gap can be an air, gas, vacuum or liquid gap if, for example, the electric drive 1 configured with a can is used as a wet rotor.
  • the structure with changing reluctance means that the reluctance acting on the magnetic field of the pole shoes 6, 8 changes when the second drive part 3 moves, so a position with high reluctance alternates with a position with low reluctance.
  • the electric drive can therefore be used as a reluctance motor.
  • first area 13 and the second area 14 are magnetically essentially isolated from one another, which means that there is a high reluctance between the first area 13 and the second area 14 . This can be done in particular by a gap between the first area 13 and the second area 14 .
  • the structure of the first area 13 and the second area 14 combines permanent magnets 15 and an alternating reluctance.
  • the first area 13 and the second area 14 each have a structure with a soft-magnetic ferromagnet with alternating elevations 16 and depressions 17 .
  • the gap between the two drive parts 2, 3 is smaller than the depressions 17, as a result of which the reluctance in the elevations 16 is also smaller than in the depressions 17.
  • a second drive part 3 with alternating reluctance can thereby be provided in a simple manner become.
  • the first area 13 and the second area 14 can in particular each be designed in the form of a gear wheel, the structure of the two areas 13, 14 being offset from one another by half a tooth spacing, in particular rotated.
  • a structure is shown in FIGS. 1 and 2 by way of example.
  • the shape of the elevations 16 and depressions 17 of the first area 13 is shown in FIG. 2 as a solid line, and the shape of the elevations 16 and depressions 17 of the first area 13 is shown as a dashed line.
  • the reluctance in the first area 13 is lower at some points and the reluctance in the second area 14 is lower at another point.
  • the differently acting reluctance is also indicated by arrows between the pole shoes 6,8.
  • Alternating reluctance in the second drive part 3 can also be achieved by using soft-magnetic flux-conducting pieces and/or flux-blocking sections, for example gaps.
  • This difference can preferably be small, in particular at most 25%.
  • the number of cores 4 can in particular be smaller, and in the case of an external rotor in particular larger than that Be number of permanent magnets 15 or the alternating reluctances in the first region 13.
  • the cores 4 are preferably U-shaped.
  • the pole shoes 6, 8 preferably form two stator rings, while the two areas 13, 14 of the second drive part 3 form two rotor rings, with the stator rings and the rotor rings each being arranged offset axially with respect to one another.
  • the second drive part 3 can in particular be designed in the form of a roller. A compact form of the electric drive 1 is advantageous here.
  • the magnetic field lines in the second drive part 3 can also be traced back well. Such preferred embodiments are shown in Figs. 1-4.
  • the first line and the second line have different radii around the axis of rotation 18, with the main magnetic flow directions of the two pole shoes 6.8 of each core 4 being aligned radially to the axis of rotation 18 and opposite to one another.
  • the cores 4 are preferably C-shaped.
  • the second drive part 3 can in particular have a shell-shaped body, with a hollow-cylindrical edge being arranged in the space between the two pole shoes 6 , 8 .
  • an outside of the edge can form the first area 13 and the inside of the edge can form the second area 14, with the permanent magnets 15 having an axial direction of magnetization being embedded in the edge.
  • first line and the second line have different radii around the axis of rotation 18 and the main magnetic flow directions of the two pole shoes 6.8 of each core 4 are aligned axially to the axis of rotation.
  • the second drive part 3 can in particular be disk-shaped, with the two areas 13, 14 being designed as rings on the same side. The advantage of this is a particularly flat design with low weight and high torque. Such preferred embodiments are shown in FIGS. 5 and 6. FIG.
  • the first drive part 2 comprises a predeterminable number of further ferromagnetic cores 20 .
  • the other cores 20 can be designed the same or at least similar to the ferromagnetic cores 4, ie in particular also have two pole shoes 6.8.
  • the additional cores 20 can in this case further increase the power of the electric drive 1 .
  • the stability of the drive part 3 can advantageously be improved by counteracting forces.
  • another core 20 is shown as an example, which is arranged on an opposite side of the second drive part 3 opposite the core 4 and interacts with a rear side of the permanent magnet 15 .
  • the first drive part 2 which can also be referred to as the flux switching stator of a magnetic flux switching machine, comprises one or more cores 4, in particular U-cores, each core 4 having two legs 5, 7 and a base area 12, the base area 12 also acting as a yoke or Connection plate can be referred to, the connection plate, the legs 5.7 on the first stator ring and the second Stator ring, whereby leg 5 of the first stator ring is operatively connected to the first area 13, preferably a pole sector of the first rotor ring of the second drive part 3 designed as a twin rotor, via the air gap, and leg 7 of the second stator ring to the second area 14 , in particular a first pole sector of the second rotor ring, is operatively connected via the air gap, with the leg 5, 7 being aligned in a normal to the active surface
  • This arrangement also creates a twin coil that forms a balanced sine load curve in both working directions and thus provides an electrically very efficient switching process.
  • the innovative design achieves high efficiency during the switching process and reduces the cogging torque and torque ripple of the FSPM machines, as well as making maintenance-friendly and robust technology possible.
  • the peripheral arrangement can particularly preferably consist of an alternating sequence of cores 4 and intermediate parts 9.
  • the impressed permanent magnet flux is alternating in the tangential direction.
  • the legs 5.7 of the cores 4 thus form the first stator ring and the second stator ring, with the pole shoes 6.8 of the legs 5.7 of the first stator ring being operatively connected to the rotor poles of the first rotor ring of the twin rotor via an air gap.
  • the coil assembly 10, 11 is advantageously applied at the end of the leg 5.7. It is conceivable that only every second leg 5.7 carries a coil arrangement 10.11. You can be wrapped around or in the leg 5.7. It can be very low-impedance, since it mainly has a switching function.
  • the two coil assembly 10,11 of a core 4 can simultaneously and in a simple design acting in opposite directions can be connected crossed as a twin coil. This results in a balanced load curve in both working directions, which can particularly advantageously be part of an electrical oscillating circuit, as a result of which large energy savings are possible with constant continuous operation.
  • the individual activation of the coil arrangements 10, 11 via integrated circuits for highly dynamic operation is advantageous.
  • the core 4 is made of SMC (soft magnetic composites) and conducts the magnetic imprinted by the intermediate part 9 Flow three-dimensionally in the designed as pole shoes 6, 8 ends of the legs 5.7, which form the two stator rings in the circumferential direction.
  • the permanent magnets of the intermediate parts 9 are in positive contact with the pole side on the base area 12 and are secured by positioning webs and surrounded by an advantageously non-magnetic stator casing.
  • the stator shell can also be a thin magnetically conductive web that saturates.
  • the cores 4 are arranged in the circumferential direction with alternating permanent magnet flux on the pole shoes 6.8.
  • the permanent magnets of the intermediate parts 9 can be continuous or divided, in one piece or in several pieces.
  • the coil arrangement 10, 11 from the first stator ring and from the second stator ring can, in a simple embodiment, be connected crossed at the same time and acting in opposite directions as a twin coil.
  • the exemplary second drive part 3, designed as a twin rotor is designed according to the reluctance principle with raised soft-magnetic poles in the circumferential direction, which form the first rotor pole ring and the phase-shifted second rotor pole ring.
  • the soft-magnetic pole sectors on the rotor ring are divided in such a way that at least one pair of rotor poles can be aligned with a pair of legs 5,7 in the stator ring, which have a magnetic flux of opposite polarity imposed by the intermediate parts 9, so that a magnetic path is closed via the rotor poles.
  • the coil arrangements 10,11 are now energized by a pair of legs 5,7 of the pair of legs in the stator ring, which are subjected to opposite polarity with permanent magnetic flux, under which the phase-shifted rotor poles on the rotor pole ring are aligned up to now and develop a magnetic flux that the permanent magnetic flux in the leg 5, 7 of the second stator ring stops and the rotor poles remaining underneath on the second rotor pole ring can run out without cogging torque.
  • the current pulse deflects the electromagnetic flux and the entire permanent magnet flux into the first stator ring, as a result of which this pair of legs now forms a strong magnetic flux and the two rotor poles closest in the circumferential direction on the first rotor pole ring are attracted.
  • the oppositely acting twin coils in the first stator ring can be energized in a reinforcing direction, so that they suck in the magnetic flux and strengthen the permanent magnetic flux in leg 5 of the first stator ring.
  • a feature X or an object Y is distinguished in several embodiments by means of an ordering numeral, for example “first”, “second” or “third”, unless this is otherwise defined by the disclosure of the invention.
  • a feature X or object Y with an ordering numeral in a claim does not mean that an embodiment of the invention covered by this claim must have a further feature X or a further object Y.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Linear Motors (AREA)

Abstract

La présente invention concerne un entraînement électrique (1) comprenant une première partie d'entraînement (2) et une seconde partie d'entraînement (3), qui est mobile par rapport à la première partie d'entraînement (2). La première partie d'entraînement (2) comprend un nombre prédéterminé de noyaux ferromagnétiques (4), chaque noyau (4) comprend une première branche (5) avec une première pièce polaire (6) et une seconde branche (7) avec une seconde pièce polaire (8), les premières pièces polaires (6) des noyaux (4) sont disposées le long d'une première ligne et les secondes pièces polaires (8) des noyaux (4) sont disposées le long d'une seconde ligne, s'étendant à distance de la première ligne. Pour magnétiser les noyaux (4), des pièces intermédiaires (9) à aimantation permanente sont disposées entre des noyaux (4) voisins, les pièces polaires (6, 8) d'un même noyau ferromagnétique (4) sont de même polarité magnétique, les pièces polaires (6) voisines sont de polarité magnétique opposée, et pour au moins l'un des noyaux (4), la première branche (5) comporte un premier agencement de bobine (10) et la seconde branche (7) un second agencement de bobine (11).
PCT/EP2022/070355 2021-08-23 2022-07-20 Entraînement électrique Ceased WO2023025480A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22754838.5A EP4393053A1 (fr) 2021-08-23 2022-07-20 Entraînement électrique

Applications Claiming Priority (2)

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AT602152021 2021-08-23
ATA60215/2021 2021-08-23

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WO2023025480A1 true WO2023025480A1 (fr) 2023-03-02

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Citations (8)

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JPS49137009U (fr) * 1973-03-27 1974-11-26
US4370577A (en) * 1980-07-22 1983-01-25 Matsushita Electric Industrial Co., Ltd. Linear motor
JPS61180581U (fr) * 1985-04-30 1986-11-11
CN102244448A (zh) * 2010-05-11 2011-11-16 上海电机学院 低转矩脉动永磁开关磁链电机
CN103762802A (zh) * 2014-01-15 2014-04-30 中国科学院电工研究所 一种同轴双永磁式磁通切换电机
US20140125157A1 (en) * 2011-08-25 2014-05-08 Harbin Institute Of Technology Poly-Phase Reluctance Electric Motor with Transverse Magnetic Flux
US20160049853A1 (en) * 2014-08-13 2016-02-18 Wisconsin Alumni Research Foundation Dual stator, flux switching permanent magnet machine
CN106849567A (zh) * 2016-11-25 2017-06-13 南京航空航天大学 一种高功率密度的磁通切换永磁电机

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CN102244448A (zh) * 2010-05-11 2011-11-16 上海电机学院 低转矩脉动永磁开关磁链电机
US20140125157A1 (en) * 2011-08-25 2014-05-08 Harbin Institute Of Technology Poly-Phase Reluctance Electric Motor with Transverse Magnetic Flux
CN103762802A (zh) * 2014-01-15 2014-04-30 中国科学院电工研究所 一种同轴双永磁式磁通切换电机
US20160049853A1 (en) * 2014-08-13 2016-02-18 Wisconsin Alumni Research Foundation Dual stator, flux switching permanent magnet machine
CN106849567A (zh) * 2016-11-25 2017-06-13 南京航空航天大学 一种高功率密度的磁通切换永磁电机

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