EP0487552B1 - Actuateur rotatif electromagnetique - Google Patents

Actuateur rotatif electromagnetique Download PDF

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Publication number
EP0487552B1
EP0487552B1 EP90911280A EP90911280A EP0487552B1 EP 0487552 B1 EP0487552 B1 EP 0487552B1 EP 90911280 A EP90911280 A EP 90911280A EP 90911280 A EP90911280 A EP 90911280A EP 0487552 B1 EP0487552 B1 EP 0487552B1
Authority
EP
European Patent Office
Prior art keywords
resetting element
rotary actuator
permanent magnet
actuator according
arms
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.)
Expired - Lifetime
Application number
EP90911280A
Other languages
German (de)
English (en)
Other versions
EP0487552A1 (fr
Inventor
Thomas Bertolini
Werner Herm
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.)
OFFERTA DI LICENZA AL PUBBLICO OFFERTA DI LICENZA
Original Assignee
Robert Bosch 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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0487552A1 publication Critical patent/EP0487552A1/fr
Application granted granted Critical
Publication of EP0487552B1 publication Critical patent/EP0487552B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/14—Pivoting armatures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D9/00—Controlling engines by throttling air or fuel-and-air induction conduits or exhaust conduits
    • F02D9/08—Throttle valves specially adapted therefor; Arrangements of such valves in conduits
    • F02D9/12—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having slidably-mounted valve members; having valve members movable longitudinally of conduit
    • F02D9/16—Throttle valves specially adapted therefor; Arrangements of such valves in conduits having slidably-mounted valve members; having valve members movable longitudinally of conduit the members being rotatable
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/14—Pivoting armatures
    • H01F7/145—Rotary electromagnets with variable gap

Definitions

  • the invention is based on a turntable according to the preamble of claim 1.
  • JP-U-60-88044 already discloses such a turntable with a magnetic return element which, in the event of power failure of the servomotor, transfers the armature of the turntable to a defined rest position .
  • the known restoring element consists of two further permanent magnets connected to the armature.
  • the servomotor has further permanent magnets for the drive which are fixed to the housing.
  • the maximum torque of the restoring element counteracting the control torque is undesirably large.
  • the turntable according to the invention with the characterizing features of claim 1 has the advantage that the restoring element has a more favorable torque characteristic with a significantly simplified structure.
  • the use of the at least one permanent magnet segment of the servomotor for the reset device also results in a reduction in parts and a shortening of the installation space.
  • the measures listed in the dependent claims allow advantageous refinements and improvements of the rotary actuator specified in claim 1.
  • the asymmetrical cross-sectional shape of the restoring element which brings about a further reduction in the maximum torque at least in one direction of rotation with a simultaneous increase in the restoring angle from which the element turns back into its desired detent position, is particularly advantageous.
  • the disc-shaped design reduces the axial length of the reset device. Due to the small radial width of the arms of the restoring element, a steep zero crossing in the torque-rotation angle characteristic curve and thus and a more precise adherence to the locking point is achieved, into which the element turns back when the servomotor is de-energized.
  • Figure 1 shows a longitudinal section through a rotary actuator
  • Figure 2 shows a reset element in plan view.
  • the rotary actuator 1 has a servomotor 2, the rotor of which acts on a throttle element 3, which is arranged in a bypass line 4 to an intake pipe 5 with a throttle valve for regulating the idle combustion air of an internal combustion engine.
  • the throttle element 3 is designed as a rotary slide valve, which more or less closes a control opening 6 in the bypass line 4.
  • the control opening 6 is arranged in a housing 12 in which the throttle element 3 is also accommodated.
  • the servomotor 2 consists of a central stator 7 with field windings 8 and a cup-shaped armature 9 forming the rotor, which has two permanent magnet segments 10 arranged on its wall in the form of a cylinder jacket.
  • These permanent magnet segments 10 are bowl-shaped and cover an angular range of approximately 135 ° each.
  • the armature 9 has a smooth shaft 11 which is mounted in two bearings 13, 14 held in the housing 12 with low friction.
  • the throttle element 3 controlling the bypass line 4 is fastened to the shaft 11.
  • the stator 7 is mounted on a housing cap 16 which projects beyond the rotor 9 and the stator 7 and is connected to the housing 12. It carries on its axis 17 a restoring element 18 made of ferromagnetic material.
  • the restoring element 18 can thus be rotated like the stator 7. It is designed as a thin disk and is located in the effective area of the permanent magnet segments 10 of the armature 9 in such a way that it extends radially close to the permanent magnets without touching them.
  • the permanent magnet segments 10 protrude beyond the restoring element 18 in an axial extent.
  • the restoring element 18 (see FIG. 2) consists of a central part 19, which is plugged onto the axis 17 and has a central bore 20, which bears two radial extensions 21 which extend in the form of a spoke. At the outer ends of the extensions 21, two laterally directed arms 22, 23, 24, 25 are attached in the manner of a wheel rim, which extend approximately along a circular line forming the circumference of the restoring element 18. One of the arms 25 is longer in the circumferential direction by an extension 26 than the others. Two arms 22 and 23 or 24 and 25 together form a magnetizable pole of the restoring element 18. The two arms 22 and 23 together cover an angle of approximately 135 ° corresponding to the angular range of the permanent magnet segments 10.
  • the two arms 24 and 25 cover one the angular extent of the extension 26 of approximately 20 ° to 30 ° larger angular range than 135 °.
  • the arms 22 to 25 are arranged point-symmetrically to the bore 20 without the shoulder 26. Due to the extended arm 25, the reset element 18 becomes asymmetrical, so that there is neither point nor axis symmetry. This can also be achieved by shortening one arm 25. The free ends of the arms 22 to 25 never touch.
  • the radial width of the arms 22 to 26 is small; in the exemplary embodiment, it is substantially smaller than the material thickness of the disk 18 in the direction of the axis 17. In the extension of the extensions 21, the restoring element 18 has flats 27, so that there the distance to the permanent magnet segments 10 is greater than in the arms 22 to 25.
  • one of the extensions 21 has a threaded hole 29 extending from the circumference to the bore 20, into which a worm screw can be screwed.
  • the return element can also be layered from individual sheets and pressed onto the shaft.
  • the reset element 18 has the task of transferring the rotor and thus the throttle element 3 in the de-energized state of the servomotor 2 into a defined position and holding it there in order to ensure the opening of an emergency running cross-section via the throttle element in the bypass line 4, via which there is sufficient air can flow for the safe continued operation of the internal combustion engine.
  • sufficient restoring torque must be available in every operating position of the throttle member 3 and the rest point of the armature, that is to say the magnetic locking point of the restoring device shown in FIG. 2, must be maintained with great accuracy.
  • the arms 22 to 24 extend approximately over the same length of the permanent magnet segments 10, while the arm 26 projects into the gap formed in the circumferential direction between the permanent magnet segments.
  • the maximum of the restoring torque must not exceed the control torque of the servomotor.
  • the reset device according to the invention fulfills these requirements.
  • the torque curve over the angle of rotation is flatter in comparison to a conventional turntable and still steep at the rest point, so that the rest point remains limited to a narrow angular range of 2 ° to 4 ° (influence of friction and hysteresis).
  • the restoring area is enlarged compared to a symmetrical arrangement, so that when the restoring element is used in a rotary actuator, provision is also made against jumping into the next latching position.
  • the reset angle is increased at least in the direction in which the predominant control range of the servomotor lies from approximately 40 ° to approximately 65 °.
  • the invention is not limited to the exemplary embodiments. It is sufficient for the function of the restoring element if only one of the permanent magnet segments is extended in this way and acts on, for example, a two-arm restoring element.
  • the magnetic reset can also be designed as a four-pole system.
  • the locking points lie on the center of the permanent magnet. Instead, locking points located on the magnetic gap, that is to say rotated by 90 °, can also be designed as operating locking points.
  • the arms 22 to 25 would have to be made thicker and the flats 27 at the ends of the extensions 21 should be formed as pronounced cutouts.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
  • Control Of Throttle Valves Provided In The Intake System Or In The Exhaust System (AREA)
  • Valve Device For Special Equipments (AREA)

Abstract

Un actuateur rotatif (1) comportant un élément de rappel magnétique (18), en particulier pour la commande d'une section d'étranglement, doit être simplifié dans sa structure et la courbe de couple de l'élément (18) doit être améliorée. A cet effet, l'élément de rappel (18) est réalisé en matériau ferromagnétique et disposé dans la zone des segments d'aimants permanents (10) du servomoteur (2). Par la configuration asymétrique de l'élément de rappel (18) avec trois bras courts (22 à 24) et un bras prolongé (25), le couple moteur maximal généré par l'élément (18) est réduit et l'angle de rappel, à partir duquel l'élément (18) retourne à sa position de crantage désirée, est augmenté. L'actuateur rotatif (1) convient en particulier comme actuateur de ralenti pour moteurs à combustion interne.

Claims (9)

  1. Actuateur rotatif électromagnétique (1) pour commander une section d'étranglement, notamment dans la conduite (4) du fluide moteur alimentant un moteur à combustion interne, avec un moteur d'actua- teur (2) logé dans un boîtier (12, 16), un stator (7) fixe par rapport au boîtier (12, 16) et un induit (9), relié à un organe d'étranglement (3), cet induit étant tournant, et le stator (7) ou l'induit (9) comporte des segments d'aimant permanent (10) symétriques par rapport à l'axe de rotation de l'induit (9) l'autre élément comportant des enroulements de champ (8) traversés par le courant, ainsi qu'un élément de rappel, magnétique (18) agissant sans contact, pour l'organe d'étranglement (3), cet élément de rappel (18) étant placé dans le champ d'au moins un segment d'aimant permanent (10), caractérisé en ce que l'élément de rappel (18) est en une matière ferromagnétique et au moins l'un des segments d'aimant permanent (10) est prolongé dans la direction longitudinale du moteur de l'actuateur (2) et l'élément de rappel (18) est situé dans le prolongement d'au moins ce segment d'aimant permanent (10).
  2. Actuateur rotatif selon la revendication 1, caractérisé en ce que l'élément de rappel (18) est asymétrique notamment sans symétrie par rapport à un point ou un axe dans un plan perpendiculaire à l'axe (17) du stator (7).
  3. Actuateur rotatif selon l'une des revendications précédentes, caractérisé en ce que l'élément de rappel (18) est formé d'un disque mince dans la direction axiale.
  4. Actuateur rotatif selon l'une des revendications précédentes, caractérisé en ce que l'élément de rappel (18) comporte deux prolongements radiaux (21), diamétralement opposés et partant de l'extrémité extérieure de chaque prolongement (21), chaque fois deux bras (22-25) s'étendent suivant un cercle imaginaire.
  5. Actuateur rotatif selon l'une des revendications précédentes, caractérisé en ce que l'un des bras (25) de l'élément de rappel (18) est plus long ou plus court que les trois autres bras (22-24).
  6. Actuateur rotatif selon l'une des revendications précédentes, caractérisé en ce que les bras (22-25) ne sont que minces dans leur extension radiale.
  7. Actuateur rotatif selon l'une des revendications précédentes, caractérisé en ce que les enroulements de champ (8) et l'élément de rappel (18) sont prévus sur le stator (7) du moteur (2) de l'actuateur.
  8. Actuateur rotatif selon l'une des revendications précédentes, caractérisé en ce que l'induit (9) du moteur (2) de l'actuateur est en forme de gobelet entourant le stator (7) et les segments d'aimant permanent (10) sont prévus axialement en saillie sur les parois cylindriques de l'induit (9) et de l'élément de rappel (18).
  9. Actuateur rotatif selon l'une des revendications précédentes, caractérisé en ce que l'élément de rappel (18) porte des méplats (27) dans l'alignement des prolongements (21), méplats dans la zone desquels la distance entre l'élément de rappel (18) et les segments d'aimant permanent (10) est supérieure à la distance dans la zone des bras (22-25).
EP90911280A 1989-08-16 1990-08-03 Actuateur rotatif electromagnetique Expired - Lifetime EP0487552B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3926911A DE3926911A1 (de) 1989-08-16 1989-08-16 Elektromagnetischer drehsteller
DE3926911 1989-08-16

Publications (2)

Publication Number Publication Date
EP0487552A1 EP0487552A1 (fr) 1992-06-03
EP0487552B1 true EP0487552B1 (fr) 1994-03-09

Family

ID=6387151

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90911280A Expired - Lifetime EP0487552B1 (fr) 1989-08-16 1990-08-03 Actuateur rotatif electromagnetique

Country Status (10)

Country Link
US (1) US5402022A (fr)
EP (1) EP0487552B1 (fr)
JP (1) JP2801397B2 (fr)
KR (1) KR0171904B1 (fr)
AU (2) AU638266B2 (fr)
BR (1) BR9007594A (fr)
DE (2) DE3926911A1 (fr)
ES (1) ES2051021T3 (fr)
HU (1) HU208759B (fr)
WO (1) WO1991003062A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2756660B1 (fr) * 1996-12-04 1999-04-02 Moving Magnet Tech Actionneur electromagnetique pour le deplacement en rotation d'un organe mobile sur une course limitee
DE19932826A1 (de) * 1999-07-14 2001-01-25 Mann & Hummel Filter Rohr mit veränderbarem Ansaugquerschnitt
US6497245B1 (en) 1999-10-13 2002-12-24 Denso Corporation Intake air controller for internal combustion engine and manufacturing the same
DE10008296A1 (de) * 2000-02-23 2001-02-22 Daimler Chrysler Ag Vorrichtung zur Betätigung eines Drosselklappenelements
FR2837032B1 (fr) * 2002-03-05 2004-08-06 Moving Magnet Tech Mmt Actionneur lineaire comprenant un moteur electrique polyphase
FR2837033B1 (fr) * 2002-03-05 2004-09-24 Moving Magnet Tech Mmt Actionneur lineaire comprenant un moteur electrique polyphase
CN103453164B (zh) * 2013-09-13 2017-01-11 河北宝信钢铁集团有限公司 闸阀
WO2019169190A1 (fr) * 2018-02-28 2019-09-06 Clio Technology, LLC Système et procédés de pompage automatisé

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3234436A (en) * 1962-09-12 1966-02-08 Daco Instr Company Inc Rotary electromagnetic actuator
GB1213463A (en) * 1966-12-28 1970-11-25 Nippon Electric Co Improvements in or relating to permanent magnet d.c. motors
GB1237383A (en) * 1968-09-17 1971-06-30 Ferranti Ltd Improvements relating to rotary electromagnetic actuators
FR2209246B1 (fr) * 1972-12-05 1978-03-03 Fresard Freres Sa
US4500861A (en) * 1983-02-17 1985-02-19 Nelson Victor H Sector motor having latching means for rotor in multiple positions
GB8811650D0 (en) * 1988-05-17 1988-06-22 Econocruise Ltd Improvements in & relating to electromagnetic actuators
DE4019749A1 (de) * 1990-06-21 1992-01-09 Bosch Gmbh Robert Elektromagnetischer drehsteller

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
Japanisches Gebrauchsmuster 60-88044 *
Patent Abstracts of Japan, Vo. 5, No. 145 (E-74)(817), 12.09.1981, & JP-A-56 79410 *
Patent Abstracts of Japan, Vol. 9, No. 110 (E-314)(1833), 15.05.1985, & JP-A-60 2064 *

Also Published As

Publication number Publication date
AU638266B2 (en) 1993-06-24
AU6052790A (en) 1991-04-03
BR9007594A (pt) 1992-06-30
US5402022A (en) 1995-03-28
KR920704320A (ko) 1992-12-19
DE59004952D1 (de) 1994-04-14
KR0171904B1 (ko) 1999-05-01
JP2801397B2 (ja) 1998-09-21
JPH04507327A (ja) 1992-12-17
HU9200457D0 (en) 1992-04-28
HU208759B (en) 1993-12-28
ES2051021T3 (es) 1994-06-01
DE3926911A1 (de) 1991-02-21
HUT60565A (en) 1992-09-28
EP0487552A1 (fr) 1992-06-03
WO1991003062A1 (fr) 1991-03-07
AU648461B2 (en) 1994-04-21
AU3530993A (en) 1993-07-29

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