EP1504515A1 - Systeme d'entrainement lineaire electromagnetique - Google Patents

Systeme d'entrainement lineaire electromagnetique

Info

Publication number
EP1504515A1
EP1504515A1 EP03737896A EP03737896A EP1504515A1 EP 1504515 A1 EP1504515 A1 EP 1504515A1 EP 03737896 A EP03737896 A EP 03737896A EP 03737896 A EP03737896 A EP 03737896A EP 1504515 A1 EP1504515 A1 EP 1504515A1
Authority
EP
European Patent Office
Prior art keywords
longitudinal
motor
linear drive
stator
drive 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.)
Withdrawn
Application number
EP03737896A
Other languages
German (de)
English (en)
Inventor
Sebastian Aigner
Mohammad Mehdianpour
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.)
Siemens AG
Original Assignee
Siemens AG
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 AG filed Critical Siemens AG
Publication of EP1504515A1 publication Critical patent/EP1504515A1/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Withdrawn legal-status Critical Current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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B23Q5/28—Electric drives
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/22—Optical devices
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K13/00—Apparatus or processes specially adapted for manufacturing or adjusting assemblages of electric components
    • H05K13/04—Mounting of components, e.g. of leadless components
    • H05K13/0404—Pick-and-place heads or apparatus, e.g. with jaws
    • H05K13/0406—Drive mechanisms for pick-and-place heads, e.g. details relating to power transmission, motors or vibration damping
    • 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
    • H02K2201/18—Machines moving with multiple degrees of freedom

Definitions

  • the invention relates to an electromagnetic linear drive with a stator and at least one motor which can be moved along a longitudinal guide, the stator and the motor being alternately provided with electromagnetic longitudinal drive elements.
  • Such a linear drive is such. B. known from WO 0016468 A.
  • the stator is then covered with permanent magnets that are lined up linearly.
  • the motor (rotor) which can be moved over it, has electromagnetically activated coil elements that interact with the stationary longitudinal drive elements and is guided on the stator by means of two linear guides using ball-ring technology. These linear bearings absorb the one-sided magnetic forces.
  • the invention has for its object to reduce the management effort.
  • the electromagnetic lateral guidance makes it possible to move the motor exactly parallel to the longitudinal marking.
  • the z. B. air-bearing motor does not require any mechanical connection to the stator. However, it is also possible to use double-acting linear motors in which the magnetic forces cancel each other out, so that a floating effect can also be achieved here.
  • the longitudinal marking can e.g. B. with little additional effort on a longitudinal scale on which the markings are shown photolithographically.
  • the optical position sensor continuously records the relative position of the motor to the longitudinal marking.
  • the guide elements are formed by a type of transverse drive elements which correct the deviations of the motor in the transverse direction depending on the sensor values. They are similar in design and function to the longitudinal drive elements and can be combined with them in an integrated structure with relatively little additional effort.
  • the linear drive can be used for different tasks without the need for special adjustments. It is particularly suitable for positioning tasks in which essentially only acceleration and braking forces occur in the longitudinal direction.
  • z. B when transporting a workpiece from a pick-up area to an assembly site, accurate guidance is only required when picking up and assembling. A large part of the transport route can thus be accelerated without precise control.
  • the centering effect of the longitudinal drive elements makes it possible to dispense with the guide elements of the stator.
  • the optical guide means Due to the small lateral deflection, it is possible to arrange the optical guide means outside of the electromagnetic drive area. When the air pressure in the air bearing ceases to exist, the motor is pulled against the stator with high force by the permanent magnets. By arranging the optics outside of this area, it is possible to maintain a sufficient safety distance between the measuring and sensor surfaces, which prevents damage.
  • two directly adjacent linear drives can be formed, with which the assembly performance can be increased considerably.
  • the two motors can be guided close to each other and thus, B. can be positioned simultaneously over a circuit board in order to simultaneously set up two components. Due to the lateral deflectability of the motors, it is possible to mount the components at the same time even if the transverse distance does not correspond to the central distance of the transverse drives.
  • the two stators are combined in a common structure, which reduces the manufacturing effort and increases the accuracy of the mutual assignment.
  • workpiece carriers or placement heads can be operated in a rotating, performance-enhancing manner and positioned individually without the need for a delicate mechanical deflection.
  • the motors can be introduced into the new line in each case without mechanical running-in means and stops.
  • FIG. 1 shows a top view of the underside of a linear drive
  • Figure 2 is an end view of the linear drive of Figure 1 with a placement head.
  • the linear drive according to FIGS. 1 and 2 consists of a stator 1 and a motor 2 which can be moved on it.
  • a sensor head 3 fastened to the motor 2 is directed to a scale 4 fastened to the stator 1.
  • the stator 1 and the motor 2 are alternately with in a longitudinal direction lined up, transverse longitudinal drive elements 5 z. B. in the form of permanent magnets 6 of the stator 1 and coil segments 7 of the motor 2.
  • longitudinal electromagnetic guide elements 8 are arranged on the stator 1 and on the motor 2, which are used for the frictional lateral guidance of the motor 2.
  • the scale 4 is provided with a measuring scale 9 formed from transverse markings and with longitudinal markings 10 which extend parallel to the row direction of the longitudinal drive elements 5.
  • a position sensor 11 of the sensor head 3 detects the position of the longitudinal markings relative to the motor.
  • a measuring Sensor 12 of the sensor head 3 is used to determine the position of the motor 2 on the basis of the measuring scale 9 in the longitudinal direction.
  • the longitudinal drive elements 5 enable the motor 2 to be advanced in the row direction by appropriate energization of the coil segments 7.
  • the motor 2 can also be deflected out of a central track by energizing the guide elements 8 assigned to the motor, the dash-dotted contours of the motor 2 being the same indicate maximum deflection.
  • the degree of the respective deflection can be recognized and controlled by the position sensor 11.
  • the measuring head 3 and the scale 4 are outside the electromagnetic drive range. When the motor 2 is placed on the stator 1, a minimum distance can be maintained between the measuring head 3 and the scale 4, which prevents mutual damage.
  • the guide elements 8 are exactly aligned in the longitudinal direction and counteract a rotation of the motor 2 to secure the position. If the requirements for the angular position are very high, it is also possible to provide two of the position sensors at a distance from one another. On the motor, two of the guide elements are arranged one behind the other in the longitudinal direction in each row, which enable a correction of the angular position by different energization.
  • a placement head 13 On the underside of the motor 2, a placement head 13 is attached, which is provided with suction pads 14 for electronic components 15. These are displaceable perpendicular to the plane of the stator 1 and can thus remove the components 15 from one
  • a second placement head 13 with an additional linear drive is indicated by dash-dotted lines, in which the stator 1 is widened accordingly and in which the drive and guide elements are doubled to form a second path.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Linear Motors (AREA)

Abstract

L'invention concerne un système d'entraînement linéaire électromagnétique comprenant un stator (1) et un moteur (2) à déplacement linéaire. Le stator (1) et le moteur (2) présentent en alternance des éléments d'entraînement longitudinaux électromagnétiques (5) et des éléments de guidage transversaux électromagnétiques (8) qui maintiennent le moteur (2), à l'aide d'un marquage optique longitudinal (10) et d'un capteur de position (11), dans une voie de guidage définie. Cette configuration permet de faire l'économie d'éléments de guidage mécaniques onéreux.
EP03737896A 2002-05-15 2003-05-15 Systeme d'entrainement lineaire electromagnetique Withdrawn EP1504515A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10221658 2002-05-15
DE10221658 2002-05-15
PCT/DE2003/001576 WO2003098782A1 (fr) 2002-05-15 2003-05-15 Systeme d'entrainement lineaire electromagnetique

Publications (1)

Publication Number Publication Date
EP1504515A1 true EP1504515A1 (fr) 2005-02-09

Family

ID=29432125

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03737896A Withdrawn EP1504515A1 (fr) 2002-05-15 2003-05-15 Systeme d'entrainement lineaire electromagnetique

Country Status (3)

Country Link
EP (1) EP1504515A1 (fr)
AU (1) AU2003245836A1 (fr)
WO (1) WO2003098782A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10345538A1 (de) * 2003-09-30 2005-05-12 Siemens Ag Bestückkopf mit einer Greifereinheit zum Bestücken von Substraten mit elektrischen Bauelementen
DE102005011830A1 (de) * 2005-03-15 2006-09-21 Pasim Direktantriebe Gmbh Luftgelagerte Linearachse mit Magnetführung
JP4669021B2 (ja) * 2008-03-28 2011-04-13 ヤマハ発動機株式会社 リニアモータユニットおよび該リニアモータユニットを備えた電子部品移載装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA968019A (en) * 1971-09-08 1975-05-20 Walter E. Hinds Positioning system using synchronous motor
JPS5619199B2 (fr) * 1972-03-28 1981-05-06
US5334892A (en) * 1992-12-22 1994-08-02 Anorad Corporation Positioning device for planar positioning
DE19842384A1 (de) * 1998-09-16 2000-03-23 Schaeffler Waelzlager Ohg Linearführung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO03098782A1 *

Also Published As

Publication number Publication date
WO2003098782A1 (fr) 2003-11-27
AU2003245836A1 (en) 2003-12-02

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