WO2025219327A1 - Moteur couple - Google Patents

Moteur couple

Info

Publication number
WO2025219327A1
WO2025219327A1 PCT/EP2025/060230 EP2025060230W WO2025219327A1 WO 2025219327 A1 WO2025219327 A1 WO 2025219327A1 EP 2025060230 W EP2025060230 W EP 2025060230W WO 2025219327 A1 WO2025219327 A1 WO 2025219327A1
Authority
WO
WIPO (PCT)
Prior art keywords
stator
torque motor
rotor
segment
motor according
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.)
Pending
Application number
PCT/EP2025/060230
Other languages
German (de)
English (en)
Inventor
Peter Fischer
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.)
Fischer Elektromotoren GmbH
Original Assignee
Fischer Elektromotoren 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 Fischer Elektromotoren GmbH filed Critical Fischer Elektromotoren GmbH
Publication of WO2025219327A1 publication Critical patent/WO2025219327A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • H02K21/02—Details
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K26/00—Machines adapted to function as torque motors, i.e. to exert a torque when stalled
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2201/00—Specific aspects not provided for in the other groups of this subclass relating to the magnetic circuits
    • H02K2201/15—Sectional machines
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2213/00—Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03—Machines characterised by numerical values, ranges, mathematical expressions or similar information

Definitions

  • a torque motor is a high-pole, electric direct drive. Torque motors have very high torques at relatively low speeds. Torque motors can be used, for example, as direct drives in rotary tables. They can also be used in devices for computer and magnetic resonance tomography. 10 STATE OF THE ART Torque motors can be implemented as external rotors or internal rotors. With an external rotor, the stator is arranged inside and the rotor outside, whereas with an internal rotor, the rotor is arranged inside and the stator outside. 15 External rotors are generally more common, as they provide greater torque for the same size.
  • Torque motors operate according to the same principle as normal synchronous motors.
  • the permanent magnets are usually glued to the inside of a tubular socket (hollow shaft) forming the rotor.
  • the stator consists of a multitude of coils embedded in an iron matrix. These coils are star-connected and supplied with three-phase current. The respective speed depends on the frequency. Due to the relatively high number of poles, high torque can be achieved at low speeds. 25 This is particularly true when the torque motor is arranged with a horizontal axis of rotation, as is the case, for example, in applications in computer and electronics. Page 1 of 10 April 14, 2025 If magnetic resonance imaging is required, special bearing requirements may arise. This can lead to a certain amount of bearing wear, particularly if the drive motor is heavy, including any attachments.
  • EP 3057209 B1 discloses a corresponding torque motor with a stator and a rotor. Excitation coils are arranged on the stator, while permanent magnets are arranged on the rotor, which are radially opposite the excitation coils across an air gap. By electrically controlling the excitation coils, the rotor can be set in rotation relative to the stator, with the axis of rotation in this case running horizontally. With an internal rotor, the vertically upper half of the stator in the direction of the gravitational force is completely equipped with excitation coils, while the vertically lower half of the stator has no excitation coils.
  • the vertically lower half of the stator is completely equipped with 15 excitation coils, while the vertically upper half of the stator has no excitation coils.
  • This arrangement of the excitation coils allows the gravitational force acting on the rotor to be at least partially compensated, thus reducing the bearing load.
  • the object of the invention is to provide an improved torque motor in which the bearing load relief can be adjusted as variably as possible.
  • the torque motor according to the invention is defined by the features of main claim 1. Useful developments of the invention are the subject of further claims following this claim.
  • the torque motor according to the invention has a stator with excitation coils and a rotor with permanent magnets.
  • the excitation coils of the stator and the permanent magnets of the rotor are radially spaced from each other via an air gap.
  • Page 2 of 10 April 14, 2025 so that the rotor can be set in rotation about a horizontal axis of rotation.
  • the rotor is ring-shaped.
  • the stator has at least one circular-arc-shaped stator segment in which several excitation coils are combined.
  • the at least one stator segment spans an angular range of a maximum of 160 degrees, in particular a maximum of 135 degrees.
  • the stator is thus no longer ring-shaped; rather, the stator comprises at least one circular-arc-shaped stator segment.
  • An arc-shaped segment is easier to assemble, transport, and store, so that overall cost-effective production is possible.
  • the at least one circular-arc-shaped stator segment allows the required motor power to be precisely calculated and adjusted.
  • the design of a single stator segment is already advantageous.
  • the arrangement of the individual stator segments can be made in the vertically upper half of the stator in the direction of the gravitational force, so that the weight force acting on the bearing (process load) can be at least partially compensated by the individual stator segment.
  • the individual stator segment can be arranged in the vertically lower half of the stator in the direction of the gravitational force.
  • the stator can comprise several circular-arc-shaped stator segments. The individual stator segments can thus be made smaller, so that assembly and storage can be further simplified.
  • the individual stator segments can be distributed around the stator 25 in such a way that the weight force acting on the bearing (process load) can be compensated as optimally as possible.
  • the angular range of at least one stator segment can in principle be freely selected.
  • the individual stator segments each span a multiple of the base motor, so that individual adaptation to the Page 3 of 10 April 14, 2025 respective requirements.
  • the circular-arc-shaped stator segments can each span approximately 45 degrees or 60 degrees each.
  • all circular-arc-shaped stator segments can be arranged in the vertically upper half of the stator in the direction of the gravitational force.
  • stator segments can correspondingly be arranged in the vertically lower half of the torque motor in the direction of the gravitational force. In this way, all stator segments can contribute to balancing the weight force (process load) acting on the bearing, so that maximum balancing of the weight force (process load) is possible.
  • two of the circular-arc-shaped stator segments can be arranged opposite one another.
  • the stator segments can, for example, be combined into two groups, with the two groups being arranged on either side of the stator. In this case, the weight force acting on the bearing (process load) is not compensated by the stator segments. However, such compensation is not necessary in all applications.
  • the stator has at least one circular arc-shaped sheet metal segment.
  • this sheet metal segment cannot contribute to driving the rotor, it can be used to individually adjust the weight force acting on the bearings (process load).
  • the design of a stator with a circular arc-shaped sheet metal segment is therefore of independent inventive significance.
  • the stator is designed with at least one stator segment, the at least one sheet metal segment and the at least one stator segment can have identical radii.
  • the at least one sheet metal segment can be arranged centrally in the direction of the gravitational force in a torque motor designed as an internal rotor. Page 4 of 10 April 14, 2025 upper half of the stator.
  • the at least one lamination segment can be arranged in the vertically lower half of the stator in the direction of the gravitational force. In this way, the lamination segment can optimally contribute to compensating the weight force (process load) acting on the bearing.
  • the at least one lamination segment can be arranged centrally in the vertically lower half of the stator in the direction of the gravitational force.
  • the at least one lamination segment 10 can be arranged in the vertically upper half of the stator in the direction of the gravitational force. The lamination segment can thus amplify the weight force (process load) acting on the bearing.
  • the at least one lamination segment can be arranged between two stator segments.
  • the at least one sheet metal segment can be adjacent to a stator segment on both sides.
  • a certain mutual distance can be maintained between the at least one sheet metal segment and at least one of the two adjacent stator segments.
  • the at least one sheet metal segment can consist, in particular, of a layered electrical steel sheet.
  • the air gap between the permanent magnets of the rotor and the at least one sheet metal segment can be individually adjustable.
  • FIG. 1 A first embodiment of the torque motor 10 according to the invention is shown schematically in Fig. 1.
  • the torque motor 10 has an annular rotor 12, which is provided with permanent magnets 14 in the usual way.
  • the rotor 12 is rotatably mounted relative to the stator 16 in the usual way. This can be achieved by means of a conventional bearing system, in particular by means of rolling bearings.
  • the stator 16 has a single stator segment 20.
  • the stator segment 20 spans an angular range of approximately 120 degrees.
  • excitation coils (not shown here) are combined in the stator segment 20.
  • the excitation coils are available to the Page 6 of 10 April 14, 2025 permanent magnets 14 arranged on the rotor 12 are arranged radially opposite one another across an air gap 24.
  • the rotor 12 can be set in rotation relative to the stator 16 about the axis of rotation 26 running in the horizontal direction via the magnetic fields extending across the air gap 24.
  • the torque motor 10 is designed as an internal rotor. The rotor 12 is thus arranged internally.
  • the stator segment 20 is therefore arranged in the vertically upper half of the stator 16 in the direction of the gravitational force.
  • the stator segment 20 therefore contributes to compensating for the weight force (process load) acting on the bearings.
  • the torque motor according to Fig. 1 could also be designed as an external rotor and thus with the rotor 12 located on the outside. In this case, the stator segment 20 would be arranged in the lower half of the stator 16, in the direction of the gravitational force.
  • a second embodiment of the torque motor 10.2 according to the invention is shown schematically in Fig. 2.
  • the torque motor 10.2 has an annular rotor 12, which is provided with permanent magnets 14 in the usual way.
  • the rotor 12 is rotatably mounted relative to the stator 16.2 in the usual way.
  • the stator 16.2 has one stator segment 20 that spans an angular range of approximately 120 degrees. Since the torque motor 10.2 in the present example is designed as an internal rotor, the individual stator segment 20 is arranged centrally in the vertically upper half of the stator 16.2, in the direction of the gravitational force. In the present example, this results in overcompensation of the weight force acting on the bearings (process load).
  • a circular sheet metal segment 30 is arranged in the center of the lower half of the stator 16.2, vertically aligned in the direction of the gravitational force, as a force relief segment. Page 7 of 10 April 14, 2025
  • the length of the sheet metal segment 30 can be adapted to the required compensating force.
  • a third embodiment of the torque motor 10.3 according to the invention is shown schematically in Fig. 3.
  • the torque motor 10.3 has an annular rotor 12, which is provided with permanent magnets 14 in the usual way.
  • the rotor 12 is rotatably mounted relative to the stator 16.3 in the usual way.
  • the stator 16.3 has a total of four identically constructed stator segments 20.3.
  • the four stator segments 20.3 are each identically constructed and, in the present example, each span an angular range of approximately 45 degrees.
  • the stator segments 20.3 are divided into two groups, each with two stator segments 20.3.
  • the two groups are each arranged at the level of the equator 28 of the stator 16.3.
  • the torque motor 10.3 is designed as an internal rotor.
  • a circular arc-shaped sheet metal segment 30.3 is arranged in the center of the vertically upper half of the stator 16.3 in the direction of the gravitational force in this example.
  • the sheet metal segment 30.3 serves as a force relief segment, so that the weight force (process load) acting on the bearings can be compensated as completely as possible by the sheet metal segment 30.3.
  • the length of the sheet metal segment 30.3 can be adapted to the required balancing force.
  • the sheet metal segment 30.3 borders on both sides of the adjacent stator segments 20.3.
  • a certain distance to the adjacent stator segment 20 could also be present on both sides or one side of the sheet metal segment 30.3 (see also Fig. 4 or 5).
  • the torque motor 10.3 according to Fig. 3 could also be designed as an external rotor and thus with external rotor. Page 8 of 10 April 14, 2025 lying rotor 12.
  • FIG. 4 A fourth embodiment of the torque motor 10.4 according to the invention is shown schematically in Fig. 4.
  • the torque motor 10.4 has an annular rotor 12, which is provided with permanent magnets 14 in the usual way.
  • the rotor 12 is rotatably mounted relative to the stator 16.4 in the usual way.
  • the stator 16.4 has a total of two identically constructed stator segments 20.4.
  • the two stator segments 20.4 each span an angular range of approximately 60 degrees and are thus somewhat larger than the stator segments 20.3.
  • stator segments 20.4 are arranged opposite one another, with both stator segments 20.4 each bordering the equator 28 of the stator 16.4. As a result, the two stator segments 20.4 do not balance the forces acting on the bearings.15
  • the torque motor 10.4 is designed as an internal rotor.
  • a circular sheet metal segment 30.4 is arranged as a force relief segment in the center of the vertically upper half of the stator 16.4 in the direction of the gravitational force.20
  • the length of the sheet metal segment 30.4 can be adapted to the required balancing force.
  • the sheet metal segment 30.4 borders the stator segment 20.4 shown on the left in Fig.4.
  • the torque motor 10.4 according to Fig. 4 could also be designed as an external rotor and thus with an external rotor 12.
  • the lamination segment 30.4 would be arranged in the lower half of the stator 16.4, in the direction of the gravitational force.
  • Page 9 of 10 April 14, 2025 A fifth embodiment of the torque motor 10.5 according to the invention is shown schematically in Fig. 5.
  • the torque motor 10.5 has an annular rotor 12, which is provided with permanent magnets 14 in the usual way.
  • the rotor 12 is rotatably mounted relative to the stator 16.5 in the usual way. 5
  • the stator 16.5 has two identically constructed stator segments 20.4.
  • the stator segments 20.4 are arranged mostly in the vertically upper half of the stator 16.5 in the direction of the gravitational force, but extend somewhat into the vertically lower half of the stator 16.5.
  • the stator segments 20.5 thus already partially compensate for the weight force (process load) acting on the bearings.
  • a sheet metal segment 30.4 is arranged as a force relief segment in the center of the vertically upper half of the stator 16.5 in the direction of the gravitational force.
  • the sheet metal segment 30.4 has a significantly greater distance from the permanent magnets 14 than the 15 stator segments 20.4.
  • the height 32 of the air gap 24 is thus increased in the area of the sheet metal segment 30.4.
  • the sheet metal segment 30.4 contributes less to compensating the weight force (process load) acting on the bearings than would be the case with a smaller air gap 24.
  • a sheet metal segment 30 is arranged as a force relief segment in the center of the vertically lower half of the stator 16.5 in the direction of the gravitational force.
  • the length of the sheet metal segment 30 can be adapted to the required compensating force.
  • the torque motor 10.5 according to Fig.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Windings For Motors And Generators (AREA)

Abstract

L'invention concerne un moteur couple (10) comprenant un stator (16), un rotor (12), des bobines d'excitation agencées sur le stator, et des aimants permanents (14) agencés sur le rotor (12). Les bobines d'excitation et les aimants permanents (14) sont radialement opposés, séparés par un entrefer (24), de sorte que le rotor (12) puisse être mis en rotation autour d'un axe de rotation horizontal (26). Selon l'invention, le rotor (12) est annulaire et le stator (16) comporte au moins un segment de stator en forme d'arc (20) dans lequel de multiples bobines d'excitation sont combinées. Le ou les segments de stator (20) s'étendent sur une plage angulaire d'au plus 160 degrés, en particulier d'au plus 135 degrés.
PCT/EP2025/060230 2024-04-16 2025-04-14 Moteur couple Pending WO2025219327A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202024101885.0 2024-04-16
DE202024101885.0U DE202024101885U1 (de) 2024-04-16 2024-04-16 Torquemotor

Publications (1)

Publication Number Publication Date
WO2025219327A1 true WO2025219327A1 (fr) 2025-10-23

Family

ID=91582199

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2025/060230 Pending WO2025219327A1 (fr) 2024-04-16 2025-04-14 Moteur couple

Country Status (2)

Country Link
DE (1) DE202024101885U1 (fr)
WO (1) WO2025219327A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10131113A1 (de) * 2001-06-28 2003-01-23 Siemens Linear Motor Systems G Rotations-Elektromotor
DE102004029925A1 (de) * 2003-06-27 2005-01-27 Aisan Kogyo Kabushiki Kaisha, Obu Drehmomentmotoren
WO2007140504A1 (fr) * 2006-06-08 2007-12-13 Johannes Kepler Universität Linz Dispositif d'entraînement rotatif électromagnétique
EP3057209B1 (fr) 2015-02-14 2019-07-17 Franke & Heydrich KG Système d'entraînement sous forme d'un moteur à couple

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10131113A1 (de) * 2001-06-28 2003-01-23 Siemens Linear Motor Systems G Rotations-Elektromotor
DE102004029925A1 (de) * 2003-06-27 2005-01-27 Aisan Kogyo Kabushiki Kaisha, Obu Drehmomentmotoren
WO2007140504A1 (fr) * 2006-06-08 2007-12-13 Johannes Kepler Universität Linz Dispositif d'entraînement rotatif électromagnétique
EP3057209B1 (fr) 2015-02-14 2019-07-17 Franke & Heydrich KG Système d'entraînement sous forme d'un moteur à couple

Also Published As

Publication number Publication date
DE202024101885U1 (de) 2024-06-05

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