EP0432181B1 - Actuateur rotatif electrique - Google Patents

Actuateur rotatif electrique Download PDF

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Publication number
EP0432181B1
EP0432181B1 EP89909163A EP89909163A EP0432181B1 EP 0432181 B1 EP0432181 B1 EP 0432181B1 EP 89909163 A EP89909163 A EP 89909163A EP 89909163 A EP89909163 A EP 89909163A EP 0432181 B1 EP0432181 B1 EP 0432181B1
Authority
EP
European Patent Office
Prior art keywords
pole
stator
rotor
poles
rotary actuator
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
EP89909163A
Other languages
German (de)
English (en)
Other versions
EP0432181A1 (fr
Inventor
Corneliu Lungu
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.)
Robert Bosch GmbH
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 EP0432181A1 publication Critical patent/EP0432181A1/fr
Application granted granted Critical
Publication of EP0432181B1 publication Critical patent/EP0432181B1/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
    • H01F7/145—Rotary electromagnets with variable gap
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02D—CONTROLLING COMBUSTION ENGINES
    • F02D11/00—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated
    • F02D11/06—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance
    • F02D11/10—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type
    • F02D2011/101—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles
    • F02D2011/102—Arrangements for, or adaptations to, non-automatic engine control initiation means, e.g. operator initiated characterised by non-mechanical control linkages, e.g. fluid control linkages or by control linkages with power drive or assistance of the electric type characterised by the means for actuating the throttles at least one throttle being moved only by an electric actuator

Definitions

  • the invention relates to an electric rotary actuator for driving an actuating element, in particular a throttle valve in the air intake pipe of an internal combustion engine, of the type defined in the preamble of claim 1 (cf. US-A-3991332).
  • Such a rotary actuator is described for example in the unpublished document DE-OS 37 43 309.
  • E-gas rotary actuators it is essential that if the power supply fails, the rotary actuator returns to its initial position, in which the throttle valve largely closes the cross section of the air intake pipe.
  • a return spring acting on the actuating shaft or on the throttle valve connected in a rotationally fixed manner is provided for this purpose.
  • a return spring adversely affects the useful torque available on the actuating shaft.
  • a stepper motor with a permanent magnet rotor is known, which is fed with pulses of alternating direction to generate a rotation on the output shaft.
  • the two stator poles of this known arrangement are symmetrical with the same Pole width, but arranged offset to each other to generate a variable air gap.
  • the rotor poles are symmetrical and arranged and extend over a circumferential angle of a maximum of 90 °.
  • the turntable according to the invention with the characterizing features of claim 1 has the advantage that a maximum magnetic flux change is caused by the asymmetrical design of the stator and rotor poles in the manner mentioned within the specified rotation angle range of the rotor, which generally leads to high efficiency.
  • the torque curve can be dimensioned specifically depending on the angle of rotation.
  • the air gap is additionally formed asymmetrically in such a way that the radial width of the air gap sections between the rotor and stator poles is minimal in the starting position of the rotor when the excitation winding is without current and is maximum in the end position reached by excitation of the stator, then occurs in the end position of the rotor after switching off the stator excitation has a magnetic restoring torque which turns the rotor back into its starting position.
  • a rotatable with the throttle valve connected to the control shaft automatically returns to its closed position. This eliminates the need for a return spring and by eliminating it, the useful torque on the actuating shaft is improved.
  • the rotor poles abut one another on an axial longitudinal side and extend in the circumferential direction over approximately 120 ° to 130 ° and that the pole width of the one stator pole is approximately 130 ° and that of the other is approximately 230 °, the surface section of the pole surface of the stator pole, which extends from the leading edge of this stator pole over approximately 100 °, being set back from the remaining surface section.
  • the drawing shows a side view of an electric turntable, partially sectioned and in a schematic representation.
  • the rotary actuator shown schematically in the drawing serves to drive a throttle valve in the air intake pipe of an internal combustion engine, which minimally releases the cross section of the air intake pipe in an idling position and completely in a full throttle position. Idle and full throttle positions are indicated by a dash-dotted line in the drawing. The transition from idle to full throttle is achieved by rotating the throttle valve by approx. 90 °.
  • the throttle valve is connected to an actuating shaft 10 of the rotary actuator.
  • the rotary actuator consists of a stator 11 and a rotor 12 rotating in the stator 11, which rotor is connected in a rotationally fixed manner to the actuating shaft 10.
  • the stator 11 carries two pronounced stator poles 13, 14 which are designed asymmetrically with pole widths which differ greatly from one another (measured in the circumferential direction).
  • the two stator poles 13, 14 are connected to one another via a yoke 17.
  • the yoke 17 is enclosed by a coil 18 with a single-strand excitation winding 19 which is supplied with a DC current of a predetermined size for the desired rotation of the rotor 12.
  • the polarity of the excitation winding 19 is selected so that the stator pole 14 with the larger pole width forms the south pole and the stator pole 13 with the smaller pole width the north pole.
  • the rotor 12 carries two permanent magnetic rotor poles 20 and 21, which are formed by shell-shaped permanent magnet segments.
  • the identically designed permanent magnet segments 22, 23 are fastened on a support 24, which is connected to the actuating shaft 10 in a rotationally fixed manner, in an asymmetrical arrangement, the two permanent magnet segments 22, 23 abutting each other with one of their axial longitudinal sides 22a and 23a.
  • the magnetization of the rotor poles 20, 21 is such that, in the starting position of the rotor 12 shown in the drawing, the permanent magnetic north pole 22 is essentially overlapped by that stator pole 13 which also represents the north pole and the permanent magnetic south pole 23 in the region of the South pole forming stator pole 14 is located.
  • An annular air gap 25 is formed between the stator poles 13, 14 and the rotor poles 20, 21.
  • the air gap section 251 under the pole face 15 of the stator pole 13 is essentially constant, there are two air gap sections 252 and 253 with a radially different air gap width below the pole face 16 of the stator pole 14. While the air gap section 252 has the same air gap width as the air gap section 251 under the stator pole 13, the radial air gap width in the region of the air section 253 is greatly increased.
  • the stator pole 14 with the larger pole width has a pole surface section 161 which extends approximately over half the pole width and is radially set back with respect to the remaining surface section 162 of the pole surface 16.
  • the arrangement of the asymmetrical stator poles 13 and 14 and the asymmetrical rotor poles 20, 21 seated on the carrier 24 is such that in the starting position of the rotor 12 shown in the drawing, with the excitation winding 19 deenergized, the rotor and stator poles 13, 14 and 20, respectively , 21 are opposite one another at the air gap 25 with a minimal air gap width and when the rotor 12 is rotated by approximately 90 ° the rotor pole 20 forming the north pole is essentially covered by the recessed surface section 161 of the pole face 16 of the stator pole 14 forming the south pole with the larger pole width.
  • This has the effect that in this state, when the energization of the excitation winding 19 is switched off, the rotor 12 returns to the starting position shown in the drawing.
  • the pole width of the rotor poles 20, 21 measured in the circumferential direction bears approximately 130 °
  • the set-back surface section 161 of the pole surface 16 of the latter stator pole 14 extends from the pole edge running up with respect to the rotor rotation over approximately 100 °.

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)

Abstract

Un actuateur rotatif électrique d'entraînement d'un élément de réglage, notamment d'une soupape d'étranglement agencée dans la tubulure d'aspiration d'air d'un moteur à combustion interne, comprend un stator bipolaire (11) excité par courant continu et un rotor bipolaire (12) à aimants permanents. Afin d'augmenter son efficacité et d'obtenir une courbe de couple mesurable en fonction de l'angle de rotation, les deux pôles (13, 14) du stator sont asymétriques et les pôles (20, 21) du rotor (12) sont asymétriquement agencés et s'étendent sur un angle circonférentiel supérieur à 90°.

Claims (7)

  1. Actuateur rotatif électrique servant à entraîner un élément de réglage, en particulier une vanne papillon dans une tubulure d'aspiration d'air d'un moteur à combustion interne, avec un stator qui présente un enroulement d'excitation à courant continu et deux pôles de stator et avec un rotor tournant entre les pôles du stator et solidaire d'un arbre de réglage, ce rotor portant deux pôles à aimants permanents, magnétisés en opposition, faisant face aux pôles du stator à travers un entrefer, actuateur rotatif caractérisé en ce que les deux pôles du stator (13, 14) n'ont pas des constitutions symétriques mais diffèrent fortement par la dimension angulaire de leurs pièces polaires et que les pôles du rotor (20, 21) s'étendent chacun sur un angle supérieur à 90° et sont disposées dissymétriquement sur le rotor (12), de telle sorte qu'ils se trouve par les premières faces longitudinales axiales plus près côte à côte que par les secondes.
  2. Actuateur rotatif selon la revendication 1, caractérisé en ce que la dimension angulaire de la largeur du pôle de stator (13), qui a la plus petite largeur de pôle, est sensiblement égale à l'angle occupé par chacun des pôles (20, 21) du rotor.
  3. Actuateur rotatif selon la revendication 2, caractérisé en ce que les pôles du rotor (20, 21) sont contigus le long de leurs faces axiales longitudinales et s'étendent sur 120° à 130° environ, et en ce que la largeur du pôle de stator (13), qui est la plus petite, occupe 120°-130° environ, tandis que la largeur du pôle de stator (14), qui est la plus grande, atteint environ 230°.
  4. Actuateur rotatif selon l'une des revendications 1 à 3, caractérisé en ce que les pôles du rotor (20, 21) sont constitués par des segments d'aimants permanents (22, 23) disposés en forme de coquille et sont fixés sur un support (24) en matériau non magnétique solidaire en rotation de l'arbre de réglage (10).
  5. Actuateur rotatif selon l'une des revendications 1 à 4, caractérisé en ce que l'entrefer (25) n'est pas symétrique de sorte que lorsque le rotor (12) a tourné et de préférence lorsqu'il est venu dans une position située à 90° de la position neutre, il existe entre au moins une partie d'un pôle du rotor (20) et une partie d'un pôle du stator (14) un entrefer radial agrandi.
  6. Actuateur rotatif selon la revendication 5, caractérisé en ce que pour former l'entrefer dissymétrique (25), la surface polaire (16) du pôle de stator (14) qui est la plus étendue présente sur sa moitié environ une portion de surface (161) reculée radialement par rapport à la portion restante (162).
  7. Actuateur rotatif selon les revendications 3 et 6, caractérisé en ce que la portion de surface polaire (161), placée en recul, du pôle de stator (14) s'étend sur environ 100°, à partir du bord du pôle situé en amont par rapport au sens de rotation du rotor.
EP89909163A 1988-09-05 1989-08-19 Actuateur rotatif electrique Expired - Lifetime EP0432181B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3830114 1988-09-05
DE3830114A DE3830114A1 (de) 1988-09-05 1988-09-05 Elektrischer drehsteller

Publications (2)

Publication Number Publication Date
EP0432181A1 EP0432181A1 (fr) 1991-06-19
EP0432181B1 true EP0432181B1 (fr) 1992-11-11

Family

ID=6362310

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89909163A Expired - Lifetime EP0432181B1 (fr) 1988-09-05 1989-08-19 Actuateur rotatif electrique

Country Status (3)

Country Link
EP (1) EP0432181B1 (fr)
DE (2) DE3830114A1 (fr)
WO (1) WO1990002870A1 (fr)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4038761A1 (de) * 1990-12-05 1992-06-11 Bosch Gmbh Robert Drehsteller
DE4038760A1 (de) * 1990-12-05 1992-06-11 Bosch Gmbh Robert Drehsteller
DE4215011B4 (de) * 1991-05-10 2006-10-12 Papst Licensing Gmbh & Co. Kg Elektromagnetischer Verstellantrieb
DE4245077B4 (de) * 1991-05-10 2007-09-27 Papst Licensing Gmbh & Co. Kg Elektromagnetischer Verstellantrieb
FR2688105B1 (fr) * 1992-02-28 1994-05-06 Moving Magnet Technologies Sa Actionneur rotatif electromagnetique monophase de course entre 60 et 120 degres.
DE4226548A1 (de) * 1992-08-11 1994-02-17 Bosch Gmbh Robert Stellantrieb zur Drehwinkelverstellung eines Stellgliedes
DE4443618C5 (de) * 1993-12-17 2004-02-05 Siemens Ag Winkelstellantrieb
DE19504243A1 (de) * 1994-06-10 1995-12-14 Philips Patentverwaltung Vorrichtung zum Verstellen eines Stellgliedes
GB2290911A (en) * 1994-06-28 1996-01-10 Dafydd Roberts Rotary electromagnetic actuator
DE69609254T2 (de) * 1995-02-10 2001-02-22 Koninklijke Philips Electronics N.V., Eindhoven Vorrichtung zur betätigung eines steuerelements
WO1996027323A1 (fr) * 1995-03-07 1996-09-12 John Dumergue Charters Appareil de dilatation d'une cavite du corps
US5870010A (en) * 1996-11-15 1999-02-09 U.S. Philips Corporation Actuator with minimized auxiliary magnet, and throttle device provided with such an actuator
KR19980081760A (ko) * 1997-04-28 1998-11-25 요트.게.아.롤페즈 안정화 정자기 토크를 갖는 전기 액츄에이터, 및 이러한 액츄에이터를 구비한 교축 장치

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2909685A (en) * 1955-08-08 1959-10-20 Ericsson Telefon Ab L M Magnet core for pulse motors
JPS4933111A (fr) * 1972-07-31 1974-03-27
DE2753396A1 (de) * 1976-11-30 1978-06-08 Denki Onkyo Co Ltd Stellmotor
JPS61169477U (fr) * 1985-04-04 1986-10-21
DE3743309A1 (de) * 1987-12-21 1989-06-29 Bosch Gmbh Robert Verfahren und einrichtung zur erkennung und lockerung verklemmter stellelemente

Also Published As

Publication number Publication date
DE58902723D1 (de) 1992-12-17
WO1990002870A1 (fr) 1990-03-22
EP0432181A1 (fr) 1991-06-19
DE3830114A1 (de) 1990-03-15

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