EP1706935A1 - Moteur lineaire modulaire - Google Patents

Moteur lineaire modulaire

Info

Publication number
EP1706935A1
EP1706935A1 EP05704559A EP05704559A EP1706935A1 EP 1706935 A1 EP1706935 A1 EP 1706935A1 EP 05704559 A EP05704559 A EP 05704559A EP 05704559 A EP05704559 A EP 05704559A EP 1706935 A1 EP1706935 A1 EP 1706935A1
Authority
EP
European Patent Office
Prior art keywords
linear motor
modules
magnets
modular
fingers
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP05704559A
Other languages
German (de)
English (en)
Inventor
Laurentius Gerardus Johannes Wolters
Hendrikus Anthonius Gerhardus Helmink
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.)
MLM Motors BV
Original Assignee
MLM Motors BV
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 MLM Motors BV filed Critical MLM Motors BV
Publication of EP1706935A1 publication Critical patent/EP1706935A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
    • H02K41/02—Linear motors; Sectional motors
    • H02K41/03—Synchronous motors; Motors moving step by step; Reluctance motors
    • H02K41/031—Synchronous motors; Motors moving step by step; Reluctance motors of the permanent magnet type

Definitions

  • the invention relates to a modular linear motor.
  • Such modular linear motors are used for instance to move carriers reciprocally over a limited length. It is possible here to envisage a transport system in a factory or for instance a parking system, wherein pallets with vehicles thereon are displaced in a building.
  • Linear motors are usually constructed in accordance with the power to be produced. The length of the linear motor is determined subject thereto. This means that each linear motor is manufactured as an individual product and that series production is difficult. It is of course possible to manufacture a number of linear motors of different lengths, and therefore different power, but for each length separate dies must be made with which the plates for the lamination stack are stamped. Around this lamination stack are arranged the coils with which the magnetic force is generated, and the driving force thus provided.
  • a modular linear motor comprising: - a number of magnets of alternating polarity placed successively in a plane,- - at least two successively placed coil modules, which modules comprise a stack of parallel plates of identical form, each provided with at least three parallel fingers, and electric coils arranged round the fingers; wherein the at least two modules are arranged at a distance from each other.
  • Three-phase electricity is normally used to energize modular linear motors.
  • a linear motor of a desired power can be assembled easily with such coil modules. These coil modules are simply placed successively, whereby a linear motor of a certain length, and therefore of the desired power, is obtained.
  • the at least two modules are arranged at a mutual distance. Here the lamination stacks of the different coil modules are thus not in contact, but have a certain distance between them. It has been found that the so-called "cogging" effect of linear motors is hereby reduced.
  • This cogging effect is the result of the electrical asymmetry of the coil modules.
  • a sticking force which causes vibrations is found to occur at the outer ends of the linear motor. It has now been found that these sticking forces are considerably reduced by arranging the modules at a distance from each other.
  • the pitch distance of the at least three parallel fingers and the pitch distance between adjacent fingers of adjacent modules are equal.
  • the modular linear motor can hereby be actuated in the same manner as a linear motor which is constructed integrally.
  • the magnets are rotated along the longitudinal axis of the fingers.
  • closing profiles are arranged on either side of the at least two successively placed coil modules.
  • the different coil modules are held together with these closing profiles.
  • Such a closing profile can for instance be an extrusion profile which is sawn off to the desired length during assembly of the linear motor, and thus forms the longitudinal sides of the linear motor.
  • there is arranged in each coil module at least one channel which connects on either side to channels arranged in the closing profiles.
  • An embodiment of the modular linear motor according to the invention comprises a stationary frame to which the modules are fixed, a guide rail arranged on the frame and a displaceable carriage which supports on the guide rail and on which the magnets are arranged.
  • the guide rail ensures that the distance between the magnets and the coil modules is held constant, whereby a maximum power can be generated. If the distance between the magnets and coil modules becomes too great, too little magnetic force can be generated.
  • the displaceable carriage comprises a U- shaped frame which encases the modules placed back-to- back.
  • a large number of coil modules can hereby be accommodated in a compact embodiment, and a high power can thus be generated.
  • the reaction forces, which are the result of energizing of the modules, are furthermore more or less neutralized they act in opposite directions due to the back-to-back arrangement.
  • Yet another embodiment of the modular linear motor according to the invention comprises a stationary vertical plate on which the magnets of alternating polarity are arranged on either side.
  • a guide rail is further arranged on the plate, on which rail supports a U-shaped carriage, wherein two sets of at least two modules are arranged on the carriage, wherein each set is directed toward a side of the vertical plate which is provided with the magnets.
  • a large number of coil modules is used in a compact embodiment, whereby a high power can once again be generated.
  • the advantage of this embodiment is that the linear motor can have a very large stroke at relatively low cost. Only the vertical plate with the magnets thereon has to be arranged over the whole length of the modular linear motor.
  • the coil modules, which involve the highest costs, can be limited, while a wide range can still be obtained. Such an embodiment is particularly important when loads must be transported over great distances.
  • Fig. 1 shows a perspective view of an embodiment of a linear motor according to the invention.
  • Fig. 2 shows a perspective view of the linear motor of fig. 1 with exploded parts.
  • Fig. 3A and 3B show a second embodiment of a linear motor according to the invention.
  • Fig. 4A and 4B show a third embodiment of a linear motor according to the invention.
  • Fig. 5 shows a cross-sectional view of a fourth embodiment of a linear motor according to the invention.
  • Fig. 1 shows a linear motor 1.
  • This linear motor 1 has a fixed part 2 on which are arranged magnets 3, 4 with an alternating polarity.
  • Linear motor 1 further has two coil modules 5, which are held together on either side by closing profiles 6. A space 7 is provided between coil modules 5. Coil modules 5 are covered at the ends by cover plates 8. In these cover plates 8 are provided recesses for channels 9, 10, with which cooling liquid can be carried through the coil modules .
  • Fig. 2 shows linear motor 1 of fig. 1 with exploded parts. Coil module 5 has a lamination stack 11 which has three fingers 12. A coil 13 is provided around each finger 12. The magnetic force is generated with this coil, and with a correct connection it is possible to ensure that the linear motor produces a propelling force. Pressed through plates 11 are two tubes 14, which ensure on the one hand that plates 11 are held together, and ensure on the other that cooling liquid can flow through the plates. A good heat transfer is achieved by the press fit.
  • Closing profiles 6 are sawn to the correct length and fixed to coil modules 5 via bolts 15 and nuts 16.
  • a channel 9, 10 is provided in closing profiles 6.
  • Tubes 14 of coil modules 5 connect to these channels 9, 10, whereby cooling liquid can be carried through coil modules 5.
  • coils 13 are cast in synthetic resin to prevent damage as a result of vibrations .
  • Linear motor 20 consists of a stationary part 21 on which a guide rail 22 is arranged. Over this guide rail 22 travels a carriage 23 which is provided with rollers 24, which engage on guide rail 22. Magnets 3, 4 are further arranged on carriage 23.
  • a linear motor as according to fig. 1 and 2 is arranged in stationary part 21.
  • This linear motor again consists of closing profiles 6 and coil modules 5 placed therebetween.
  • Fig. 3B shows clearly that lamination stack 11 is held in place by a tube 14 which debouches on both channels 9, 10 in closing profiles 6.
  • Coils 13 are arranged around the fingers of the lamination stack. It can also be seen in fig. 3B that coils 13 are cast in a synthetic resin 25. Cables 26 which actuate the different coils 13 are laid under coil modules 5.
  • Fig. 4A and 4B show a third embodiment 30 of a linear motor according to the invention.
  • This linear motor 30 has a stationary part 31 and a translating part 32.
  • the translating part 32 has a number of rollers 33 which are guided in the profiled stationary part 31.
  • the translating part 32 is substantially U-shaped and magnets 3 , 4 are arranged alternately on the inside on both legs of the U-shape.
  • the stationary part 31 comprises coil modules 5 which are placed back-to-back and which are held together by means of closing profiles 6. With this back-to-back placement a large number of coil modules can be arranged in a limited space and can develop a correspondingly high power, thereby creating a powerful linear motor.
  • Fig. 5 shows a fourth embodiment 40 of a linear motor according to the invention.
  • This linear motor 40 has a stationary part 41 with a vertical plate 42 on which magnets 3, 4 are arranged alternately on either side.
  • the stationary part 41 is further provided with rollers 43 which form a guide.
  • the translating part 44 once again has coil modules 5, which in this embodiment are directed toward each other so that they can co-act with magnets 3, 4 arranged on vertical plate 42.
  • the coil modules are again held together by closing profiles 6.
  • the translating part 44 further has two frame parts 45 which are provided with rails 46, which co-act with rollers 43. Channels 47 for cooling liquid and cable holes 48 for cables 49 are further provided in frame parts 45.
  • the cables are again provided for actuation of coil modules 5.
  • This embodiment 40 is particularly advantageous for a linear motor which must operate over longer distances.
  • the costs of providing the vertical plate 42 with magnets 3, 4 over a greater length are considerably lower than providing coil modules 5 over this length.
  • This construction can furthermore withstand weather influences well, since the electrical parts are protected from weather influences by the U-shaped construction, while the stationary part 41 comprises no components which are particularly sensitive to weather influences.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Linear Motors (AREA)

Abstract

L'invention concerne un moteur linéaire modulaire comprenant un certain nombre d'aimants à polarité alternée placés successivement sur un plan, au moins deux modules à bobines placés successivement, lesdits modules comprenant une pile de plaques parallèles de forme identique, pourvues chacune d'au moins trois doigts parallèles, et des bobines électriques disposées autour des doigts, lesdits modules étant disposés à une certaine distance l'un de l'autre.
EP05704559A 2004-01-16 2005-01-14 Moteur lineaire modulaire Withdrawn EP1706935A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1025269A NL1025269C2 (nl) 2004-01-16 2004-01-16 Modulaire lineaire motor.
PCT/NL2005/000029 WO2005074108A1 (fr) 2004-01-16 2005-01-14 Moteur lineaire modulaire

Publications (1)

Publication Number Publication Date
EP1706935A1 true EP1706935A1 (fr) 2006-10-04

Family

ID=34825243

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05704559A Withdrawn EP1706935A1 (fr) 2004-01-16 2005-01-14 Moteur lineaire modulaire

Country Status (3)

Country Link
EP (1) EP1706935A1 (fr)
NL (1) NL1025269C2 (fr)
WO (1) WO2005074108A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021084081A1 (fr) * 2019-10-31 2021-05-06 B&R Industrial Automation GmbH Dispositif de transport sous la forme d'un moteur linéaire à stator long

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006025476A (ja) * 2004-07-06 2006-01-26 Fanuc Ltd 直線駆動装置
AT523101A1 (de) * 2019-10-31 2021-05-15 B & R Ind Automation Gmbh Transporteinrichtung in Form eines Langstatorlinearmotors

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57177266A (en) * 1981-04-24 1982-10-30 Shinko Electric Co Ltd Linear pulse motor
US4638192A (en) * 1981-12-11 1987-01-20 Papst-Motoren Gmbh & Co. Kg Linear DC motor
WO1988002948A1 (fr) * 1986-10-08 1988-04-21 Fanamation, Inc. Moteur lineaire a circulation de fluide pour systemes robotiques
DE19729976A1 (de) * 1997-07-12 1999-01-14 Elektrische Automatisierungs U Magnetanordnung für flachen trägheitsarmen Linearmotor
DE59813385D1 (de) * 1997-11-10 2006-04-20 Siemens Ag Linearmotor
US20030038556A1 (en) * 2000-03-30 2003-02-27 Gieskes Koenraad Alexander Variable reluctance motor
DE00988525T1 (de) * 2000-12-28 2004-07-08 Vladimir Vladimirovich Zharski Linearer synchronmotor
EP1476932B1 (fr) * 2002-02-19 2014-04-09 Parker-Hannifin Corporation Moteur lineaire avec support de rail magnetique

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005074108A1 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021084081A1 (fr) * 2019-10-31 2021-05-06 B&R Industrial Automation GmbH Dispositif de transport sous la forme d'un moteur linéaire à stator long

Also Published As

Publication number Publication date
NL1025269C2 (nl) 2005-07-19
WO2005074108A1 (fr) 2005-08-11

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