WO2008015151A1 - Moteur linéaire à compensation de l'ondulation de force - Google Patents

Moteur linéaire à compensation de l'ondulation de force Download PDF

Info

Publication number
WO2008015151A1
WO2008015151A1 PCT/EP2007/057703 EP2007057703W WO2008015151A1 WO 2008015151 A1 WO2008015151 A1 WO 2008015151A1 EP 2007057703 W EP2007057703 W EP 2007057703W WO 2008015151 A1 WO2008015151 A1 WO 2008015151A1
Authority
WO
WIPO (PCT)
Prior art keywords
primary part
flux
guiding element
primary
air gap
Prior art date
Application number
PCT/EP2007/057703
Other languages
German (de)
English (en)
Inventor
Zeljko Jajtic
Christian Volmert
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2008015151A1 publication Critical patent/WO2008015151A1/fr

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
    • 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
    • H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
    • H02K1/148—Sectional cores
    • 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
    • H02K2201/03—Machines characterised by aspects of the air-gap between rotor and stator
    • 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
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/03—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems

Definitions

  • the invention relates to a primary part for an electrical
  • the primary part is provided for arrangement with a Sekun ⁇ därteil and primary and secondary are spaced apart by an air gap and the primary ⁇ part is at least formed from a laminated core and at its respective end faces at least one flow-guiding ele ⁇ ment for reduction having the force ripple, wherein the flux guiding element has a predetermined width and length ⁇ , wherein the width is variable.
  • the invention relates to a ⁇ linear motor with such a primary part.
  • Linear motors have a primary part and a secondary part.
  • the primary part is in particular the secondary part opposite.
  • the primary part is intended to be supplied with electric current.
  • the secondary part has, for example, permanent magnets or energizable windings. Both the primary part and the secondary part have active magnetic means for generating magnetic fields.
  • Permanent-magnet linear motors have design-related power fluctuations due to motor ends, which have an adverse effect on synchronism and dynamics.
  • the power fluctuations can be traced back to the border coil in part to a smaller induced tension ⁇ calculations.
  • the toothed plates are usually used in the active winding-carrying part of the motor (primary part). Between the excitation poles and the toothed structure of the main field, a magnetic interaction takes place, which leads to parasitic detent forces, also called passive force ripple. The result is Vibra ⁇ tions, uneven running and drag error in machining processes. Furthermore, the induced voltages, ie the electromotive forces (EMF), in the initial and final coil on the front sides of the primary part due to a fe ⁇ lenden magnetic yoke usually less pronounced than in the middle coil. This has the result that the induced voltages of the motor do not form a symmetrical Sys tem ⁇ and called addition power loss of an additional current-dependent force ripple, and active force ripple results.
  • EMF electromotive forces
  • a linear motor is known, whose primary part at the end faces of the laminated core of the main ⁇ teeth having additional auxiliary teeth, said auxiliary teeth are spaced from the air gap between the primary and secondary parts by ei ⁇ NEN additional air gap. This reduces the passive force ripple of the linear motor, ie the latching force.
  • the disadvantage here is that although the latching force of the Linearmo ⁇ sector is reduced, the primary part, however, has no symmetrically induced voltages in the individual windings or coils, ie there is no reduction of the active power ripple.
  • Object of the present invention is therefore to develop a generic linear motor such that in addition to the reduction of the detent forces and a balancing of the electromotive forces takes place.
  • linear motors In contrast to rotating machines, linear motors naturally have end regions in which the electromagnetic part of the motor ends. Is a linear motor constructed, for example in short stator, will be apparent to the primary part two end portions which are beyond the control of the secondary ⁇ part. The ends of the primary interact with the Secondary part such that this has a significant influence on the active force ripple and passive Kraftwellig- speed (cogging force).
  • the primary part according to the invention is provided for arrangement with a secondary part, wherein the primary part and the secondary part are spaced apart by an air gap.
  • the secondary part has a series of ge ⁇ formed by permanent magnets Tru.
  • the primary part is formed from one or more laminations, wherein the laminated core of a
  • the primary part has a plurality of grooves and teeth, wherein the grooves serve to receive the primary part windings or coils.
  • the windings are designed, for example, as a three-phase winding of a three-phase network or of a three-phase alternating current.
  • the linear motors are formed in particular with Bruchlochwicklitch and tooth coils in the primary part, wherein the Nuttei- ment of the primary part is not equal to the pole pitch of the secondary part.
  • the ratio of Nuttei ⁇ ment to pole pitch (slot pitch / pole pitch) 8/12, 10/12, 11/12, 13/12, 14/12, 16/12.
  • the flux-guiding element has a front ⁇ can be predetermined width and length, the width over the length is variable.
  • the width of the flux guiding element is reduced in the area of the air gap facing side.
  • the flow-guiding element is for example designed such that it has a taper in the direction of the air gap.
  • the length of the flux-guiding element corresponds to the length of the remaining teeth of the primary part.
  • the flux-guiding element is attached to the end faces of the single ⁇ NEN sheets or of the entire laminated core and be ⁇ takes place at or next to the respective last of the groove or last wound tooth of the primary part.
  • the flux guiding element itself carries no winding or coil.
  • the width of the flux guiding element is reduced by bevels in the direction of the air gap.
  • the flux-guiding element can take a variety of geometric shapes in the region of the air gap supplied ⁇ facing side. If, for example, two partial surfaces are assigned to the flux-guiding element, with the first partial surface facing the air gap and the second partial surface facing away from the air gap, the first partial surface is, for example, triangular or arrow-shaped. By chamfering a reduced width is easy to implement.
  • the flux-guiding element is designed so that it partially or completely rests on a neigh ⁇ beaten winding or coil for heat exchange. As a result, an improved cooling of the winding or coil takes place.
  • the laminated core is integrally formed together with the flux ⁇ leading element.
  • the flux guiding element is already formed when making the sheets, that is, there is a one-piece metal section, whereby a simple and cost-effective production of the individual sheets with flux-conducting elements is possible.
  • Laminated core with flow-guiding element can also be formed in two parts, wherein the flux-guiding element is non-positively, material or form-fitting attachable to the laminated core.
  • the flux guiding element itself can also be formed in two parts.
  • the flux-guiding element to the or to be wound ⁇ adjacent teeth of the laminated core to a distance.
  • the distance of the flux-guiding element to the or the adjacent teeth is selected so that it corresponds to the pole pitch of the secondary part, so ei ⁇ ne highest possible Flußverkettung with the last coil and thus a deliberate increase in the induced voltage of the last coil.
  • a high attraction force between primary and secondary part aimed at, for example for the purpose of biasing force ⁇ at an air storage the optimal distance of the flux guiding element of the adjacent tooth is greater than the pole pitch of the secondary part formed.
  • the air gap facing surface of the flux guiding element is rounded.
  • the flux-guiding element has, for example, with a predetermined radius to say ⁇ te corners. This measure contributes to the reduction of the locking ⁇ forces. It is possible not to provide each sheet with a flux guiding element. For example, only every second sheet has a flux guiding element. In a ⁇ -part primary parts, ie primary parts package having only one sheet metal, it is possible that each plate has only one flux guiding element at an end portion of the sheet. The individual sheets can then be joined together, for example, to the laminated core, that by rotating the individual sheets, the flux-guiding element is aligned once to the left or to the right. The force ripple is thus sufficiently reduced compared to the previously known possibilities, wherein in addition a lower mass of the primary part is achieved by plates without flux-conducting elements.
  • the primary part of the linear motor may consist of several successively arranged in BEWE ⁇ supply direction laminated cores. Accordingly, the centrally arranged laminated cores have no flux-conducting elements, but according to the invention only flux-guiding elements are arranged at the respective ends, thus the end faces of the primary part. In this case, for example, by turning a sheet with neuroscience workedem element a sheet with left-sided element, so that on the front sides of these primary parts gapless elements are present. For primary parts with only one laminated core, ie one-piece primary parts, flux-conducting elements must be provided at each end.
  • the flux-guiding element is not formed over the entire width of a Blechpa- kets.
  • the width of the laminated core extends transversely to the direction of movement of the primary part.
  • the flux-guiding element extends only over a part ⁇ area of the laminated core, wherein the flux-guiding element may then be arranged for example centrally in the laminated core. Due to the formation of only partially flux guiding elements, the adaptation between passive and active force ripple can be made according to the requirements of the linear motor.
  • the flux guiding element serves to reduce the latching force over the length of the primary part and to increase the useful force of the linear motor.
  • the primary part according to the invention is preferably provided for a linear motor.
  • the primary part can also be used in rotary machines, wherein the stator has end regions, such as segmented rotato ⁇ hui motors.
  • FIG. 1 shows a side view of a linear motor according to the invention with a first embodiment of a flux-guiding element
  • FIG 2 shows a section of a primary part of a Linearmo ⁇ sector of FIG 1 with a second embodiment of the flux-conducting element.
  • FIG 3 shows a section of a primary part of a linear motor according to FIG 1 with a third embodiment of the flux-conducting element
  • FIG 4 shows a section of a primary part of a Linearmo ⁇ sector according to FIG 1 with a fourth embodiment of the flux-conducting element
  • 5 shows a section of a primary part of a Linearmo ⁇ sector according to FIG 1 with a fifth embodiment of the flux-conducting element
  • FIG 6 shows a detail of a primary part of a Linearmo ⁇ sector according to FIG 1 with a sixth embodiment of the flux-conducting element.
  • the primary part 2 also has the coils 4.
  • the coils 4 enclose the teeth 5 of the primary part 2 in such a way that different coils 4 are located in a groove 6.
  • the secondary part 7 is positioned on a machine bed, not shown.
  • the permanent magnets 8 are arranged with the pole pitch ⁇ M.
  • the pole pitch ⁇ M can also be formed by electrical excitation of an exciter winding arranged in the secondary part 7.
  • Primary part 2 and secondary part 7 are spaced apart by the air gap ⁇ .
  • a flux guiding element 10 for reducing the force ripple is arranged in each case.
  • the flux guiding element 10 has the predeterminable width Bi 0 , wherein the width Bi 0 of the flux guiding element 10 extends in the direction of movement R of the primary part 2.
  • the mush ⁇ te Bio of the flux guiding element 10 is reduced in the region of the air gap ⁇ side facing.
  • the flux guiding element 10 is designed such that it has a taper in the direction of the air gap .delta.
  • the flux-guiding element 10 is ⁇ in the region of the air gap ⁇ with a predetermined radius of rounded design.
  • the length Li 0 of the flux-guiding element 10 corresponds to the tooth length L 5 of the remaining teeth 5.
  • the distance ⁇ F is chosen equal to ⁇ M , so that the highest possible flux linkage with the last coil 4 and thus a desired increase in the induced voltage of the last coil 4 takes place.
  • a minimum width Bi 0 and the smallest possible distance ⁇ F of the flux- guiding element 10 to the adjacent tooth 5 are aimed for.
  • FIGS. 2 to 6 show different embodiments of the flux-conducting element 10.
  • FIG. 3 shows a flow-carrying element 10 whose width B is 0 ⁇ in the direction of the air gap sheet reduc- by two chamfers, resulting in an arrow-shaped or triangular FLAE ⁇ che or shape results.
  • FIG 4 it is shown that the element has two different widths ⁇ Liche Bi 0 without chamfers.
  • Figures 5 and 6 show elements 10, which are formed ⁇ justend ⁇ on the one hand to ver in the direction of the air gap and on the other hand, ⁇ a variable distance ⁇ F have the neighboring wound tooth. 5
  • the element 10 In the region of the side facing away from the air gap ⁇ , the element 10 extends along the adjacent coil or winding 4, whereby improved cooling of the last coil or winding 4 is achieved.

Abstract

L'invention concerne une partie primaire (2) pour moteur électrique (1), a) la partie primaire (2) étant prévue pour être disposée avec une partie secondaire (7), la partie primaire (2) et la partie secondaire (7) étant séparées l'une de l'autre par un entrefer (δ), b) la partie primaire (2) se compose d'au moins un noyau feuilleté (3) et présente au niveau de ses faces avant respectives (S1, S2) au moins un élément conducteur (10) pour réduire l'ondulation de force, c) l'élément conducteur (10) présente une largeur (B10) et une longueur (L10) pouvant être prédéfinies, la largeur (B10) étant variable. La largeur (B10) de l'élément conducteur (10) est réduite dans la zone de la face tournée vers l'entrefer (δ).
PCT/EP2007/057703 2006-07-31 2007-07-26 Moteur linéaire à compensation de l'ondulation de force WO2008015151A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200610035675 DE102006035675A1 (de) 2006-07-31 2006-07-31 Linearmotor mit Kraftwelligkeitsausgleich
DE102006035675.6 2006-07-31

Publications (1)

Publication Number Publication Date
WO2008015151A1 true WO2008015151A1 (fr) 2008-02-07

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ID=38626657

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/057703 WO2008015151A1 (fr) 2006-07-31 2007-07-26 Moteur linéaire à compensation de l'ondulation de force

Country Status (2)

Country Link
DE (1) DE102006035675A1 (fr)
WO (1) WO2008015151A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102195440A (zh) * 2010-03-11 2011-09-21 株式会社安川电机 直线电机
CN108258877A (zh) * 2018-02-05 2018-07-06 东南大学 一种基于定子弧形与内阶梯型混合结构的永磁直线电机
WO2023122258A3 (fr) * 2021-12-24 2023-07-27 Hyperloop Technologies, Inc. Topologies pour réduire l'ondulation de force pour moteurs de propulsion

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5910691A (en) * 1995-03-20 1999-06-08 Wavre; Nicolas Permanent-magnet linear synchronous motor
DE19829052C1 (de) * 1998-06-29 1999-12-30 Siemens Ag Synchronlinearmotor
JP2002209371A (ja) * 2001-01-11 2002-07-26 Yaskawa Electric Corp リニアモータ
JP2003299342A (ja) * 2002-01-29 2003-10-17 Mitsubishi Electric Corp リニアモータ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100720753B1 (ko) * 2000-04-19 2007-05-22 가부시키가이샤 야스카와덴키 영구자석형 동기 리니어모터

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5910691A (en) * 1995-03-20 1999-06-08 Wavre; Nicolas Permanent-magnet linear synchronous motor
DE19829052C1 (de) * 1998-06-29 1999-12-30 Siemens Ag Synchronlinearmotor
JP2002209371A (ja) * 2001-01-11 2002-07-26 Yaskawa Electric Corp リニアモータ
JP2003299342A (ja) * 2002-01-29 2003-10-17 Mitsubishi Electric Corp リニアモータ

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102195440A (zh) * 2010-03-11 2011-09-21 株式会社安川电机 直线电机
JP2011188709A (ja) * 2010-03-11 2011-09-22 Yaskawa Electric Corp リニアモータ
US8384252B2 (en) 2010-03-11 2013-02-26 Kabushiki Kaisha Yaskawa Denki Linear motor
CN108258877A (zh) * 2018-02-05 2018-07-06 东南大学 一种基于定子弧形与内阶梯型混合结构的永磁直线电机
WO2023122258A3 (fr) * 2021-12-24 2023-07-27 Hyperloop Technologies, Inc. Topologies pour réduire l'ondulation de force pour moteurs de propulsion

Also Published As

Publication number Publication date
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