EP1155422A1 - Dispositif de reglage electromagnetique - Google Patents

Dispositif de reglage electromagnetique

Info

Publication number
EP1155422A1
EP1155422A1 EP00971327A EP00971327A EP1155422A1 EP 1155422 A1 EP1155422 A1 EP 1155422A1 EP 00971327 A EP00971327 A EP 00971327A EP 00971327 A EP00971327 A EP 00971327A EP 1155422 A1 EP1155422 A1 EP 1155422A1
Authority
EP
European Patent Office
Prior art keywords
winding
armature
electromagnetic
actuating device
actuator 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Withdrawn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
EP00971327A
Other languages
German (de)
English (en)
Inventor
Heinz Leiber
Thomas Leiber
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1155422A1 publication Critical patent/EP1155422A1/fr
Withdrawn legal-status Critical Current

Links

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
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • H01F7/1805—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current
    • H01F7/1827—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current by changing number of serially-connected turns or windings

Definitions

  • the invention relates to an electromagnetic actuating device with the features of the preamble of claim 1.
  • the electromagnets of electromagnetic actuators e.g. B. for the valve controls of an internal combustion engine are characterized in that they have to apply a relatively high force m for a short time.
  • the dynamics of the build-up and breakdown of the magnetic force resulting primarily from the design of the excitation coil and the available supply voltage, is generally not sufficient. Inadequate dynamics cause difficulties in the so-called soft-touch control, that is to say the valve must arrive at the end position, namely fully open or closed, at a low speed, so that the armature or the valve opens at only a low speed he follows. This is necessary for noise reduction but also for
  • An electromagnetic actuating device is known from 099/06677, in which two windings per magnet are used. One winding has the task of compensating for the energy loss caused by friction and gas forces. The other winding is a high-speed excitation winding with a low time constant, which is used to regulate or control the armature position.
  • the invention is based on this prior art. From the same document it is also known to use one winding for realizing the flight phase and the other only as a holding winding.
  • the invention is based on the object of optimizing the embedding of the armature m at the end positions at low impact speeds and of ensuring that the armature m of the end position is held securely.
  • winding used above assumes that a winding is a coil or a coil combination, the active turns of which each determine a magnetic flux.
  • coil combination is also intended to include the use of a coil with a tap. Due to its low number of turns, the above-mentioned high-speed coil has a very small time constant compared to the first winding and also contributes a smaller proportion of the flow compared to the first winding.
  • the power stage circuits mentioned in claim 2 and 3 enable different operating states, with which, on the one hand, the normal control and, in addition, the operation with the fast excitation coil is made possible.
  • Operating state BZ
  • the faster degradation of the magnetic field of the first winding mentioned can be changed by changing the discharge time constant by switching the operating state of the output stage circuits mentioned, or alternatively by switching off via a Zener diode, but also by generating an opposing field by a further coil, which can also be the high-speed excitation coil. be achieved.
  • the field of the first coil is superimposed on an opposing field of an opposing coil
  • the above-mentioned faster build-up of the magnetic field is achieved by switching on the high-speed excitation coil by switching the output stage circuit mentioned to the operating state of the booster mode.
  • Booster operation can also be operated with high voltage to strengthen the magnetic force build-up.
  • the build-up of magnetic force can be achieved by generating an opposing field of a further coil, which can also be a high-speed excitation coil.
  • the invention thus also uses at least two excitation coils.
  • a (first) winding is used for the normal lifting movement and for holding the armature. If the armature movement is accelerated within the scope of the soft touch control, the fast excitation winding is switched on, which has a relatively small time constant and also realizes only part of the flow (ampere turn number). This makes it possible to quickly correct the anchor in the approach phase m the end position quickly, in the quicker
  • FIGS. 1 a and 1b show different embodiments of an electromechanical control device in which the invention can be applied.
  • Fig. Lc the interconnection of an electro-mechanical actuator and a control device
  • 3a and 3b show various possible output stage circuits for operation
  • Fig.la two two-pole electromagnets 1 and 2 are shown, which have two windings 3 and 4. These magnets 1 and 2 act on an armature 5 which is pivotally mounted about a pivot axis 6. Two oppositely directed spring forces act on the armature, which are generated at least partially by a torsion spring 7 acting on the armature 5.
  • the armature 5 acts on the stem 9 of a valve of an internal combustion engine via an actuating part 8.
  • At least the closing magnet 1 should be equipped with two windings 3, 4, because if the first winding fails, the high-speed winding can also take over the holding function important for the motor as redundancy. The fast excitation winding must then also be dimensioned accordingly in this regard.
  • FIG. 1b shows another electromechanical actuator known from DE 19825728, in which the actuation of the actuator by the armature 5 is directly follows and an upper and lower return spring generate the restoring force 7, 7 ⁇ of the armature 5.
  • the control of the control device takes place via a control device which consists of a control device 15 and the output stage circuits 14, 16 or alternatively an integrated output stage circuit for both electromagnets.
  • the excitation coils of the actuator 19 are conductively connected to the power output stages via cables, with one or more lines 17 leading to the excitation coils (each) of a magnet and depending on the number of excitation coils per electromagnet and at least one line 18 from the (the) Excitation coil (s) of a magnet leads back to the output stage circuit.
  • control device 15 measuring points of current and voltage drops at the excitation coils or possibly other measured quantities are recorded and / or signals from a superordinate control device (not shown) for engine operating functions are recorded and control signals are generated, the dependence of which controls the two excitation coils of the control device.
  • the control unit contains regulators, the controlled variables Rl, R2, and possibly further controlled variables Ri for the upper power output stage and Rl ⁇ and R2 ⁇ and possibly Ri ⁇ for the lower power output stage.
  • Measured variables of a position or speed sensor which detects the position / speed of the armature 5/5 ⁇ of the electrical actuator 19, are conceivable as further controlled variables.
  • the controller supplies the control signals on the control lines L1, L2 and possibly further control lines Li for the upper power output stage 14 as well as the control signals L1 ', L2' and possibly further control lines Li for the lower line.
  • Stungsendeck 16 via which the control unit are conductively connected to the power output stages.
  • the transistors of the output stage circuit are switched on via the control lines.
  • FIGS. 2a and 2b show two ways of forming windings 3 and 4. In the case of FIG. 2a, two independent windings 10 and 11 are provided, which can be switched on separately.
  • the winding 10 has fewer turns and thus a smaller time constant and serves as a high-speed winding.
  • the first winding is formed by the windings 12 and 13 connected in series and the winding 13 which can be switched on separately is the fast-excitation winding here.
  • the design of FIG. 2b has the advantage that when both windings 12 and 13 are used, the entire winding space is used for the flooding during the flight phase and for holding.
  • Fig.3a shows the structure of a power amplifier circuit, in which it is assumed that both electromagnets are each operated by their own power amplifier circuit.
  • the structure of an output stage circuit shown comprises a chopper transistor TR1, a booster transistor TR3 and a third transistor TR2, with their corresponding switching resistances rdsonl, rdson2 and rdson3.
  • the gate connections of the transistors are electrically connected to the control lines L1, L2 and L3.
  • the output stage circuit comprises a feedback diode D1 and a free-wheeling diode D2 and one or more measuring resistors R meS ⁇ i and R me ss2.
  • the excitation coil is divided into a primary winding Wl with inductor L_W1 and its resistor R_W1 and a secondary winding W2 with inductor L_W2 and resistor R_W2.
  • the excitation coils are designed as two coils connected in series.
  • the power output stage can be controlled in five different operating states, each of which is characterized by the respective switching state of the transistors TR 17 TR 2 and TR 3 .
  • the operating states are idle state (RZ), magnetizing (AMZ), freewheeling (FL), booster operating state (BZ) and hard shutdown with fast current recirculation (SSR).
  • the respective transistor is conductive from its dram connection to the source connection. If there is a low voltage potential at the gate connection, the transistor blocks from its drain connection to its source connection.
  • the chopper transistor TR1 and the freewheeling transistor TR2 are operated in a conductive manner, while the booster transistor TR3 is not operated in a conductive manner.
  • the current then flows from a voltage source with the potential of the supply voltage through the transistor TRl, the two excitation coil windings Wl and W2, the transistor TR2 and the measuring resistor R mess hm to a ground connection which is at a reference potential.
  • the transistor TR 2 is operated in a conductive manner and the transistors TR1 and TR3 are not conductive.
  • the freewheeling diode D2 becomes conductive and the current through the first excitation coil takes the measuring resistor as a function of the losses in the resistance of the excitation coils, the transistor TR 2 R meSs i and R meSs2 and the freewheeling diode D2.
  • the magnetic field of the coils is depleted.
  • the booster transistor TR1 In the operating state of the booster mode (BZ), which is generally initiated after the freewheeling phase FL, the booster transistor TR1 is operated together with the freewheeling transistor TR2, while the chopper transistor TRl is not switched.
  • the current increase in the pulse current depends on the ratio of the number of turns of the winding W2 to that of the windings W1 and W2 and increases with an increasingly smaller ratio.
  • This current I ⁇ m generates a voltage in the coil Wl, which drives a secondary current I sek through both coils in the same direction as the pulse current I ⁇ m when the switching transistor TRl is blocked.
  • the magnetization is accelerated by this reaction of the winding W2 on the winding W1.
  • FIG.3b An alternative power amplifier circuit, with which both electromagnets can be operated, is shown in Fig.3b.
  • This power amplifier circuit can be used if the excitation coils of the upper and lower magnets are not energized at the same time.
  • the output stage circuit consists of a chopper transistor TR1, with which the excitation coils Wla / Wlb and W2a / W2b of the two electromagnets are controlled.
  • a freewheeling transistor TR2 ⁇ and TR3 ⁇ is provided for each electromagnet, and each booster transistor TR4 and TR5.
  • a free-wheeling diode D2 ⁇ for both electromagnets and a return diode Dl ⁇ and D3.
  • the diodes can be replaced by one or more power transistors.
  • the same operating conditions as with the embodiment of FIG. 3a are possible.
  • the circuit has the advantage that considerably fewer components are required than if an output stage circuit is used for each electromagnet, so that the costs are significantly reduced.
  • FIG. 4a shows the typical increase in ampere turns (AW) during the flight phase, that is to say when the armature, affected by gas and frictional forces, moves from one end position to the other.
  • AW ampere turns
  • Booster mode BZ may occur several times (also with e) as a result of the deviation from the setpoint.
  • the activation in the area of the stroke end position with small air gaps is particularly advantageous for a high power yield.
  • the high dynamics of the current increase is advantageous for fine control to achieve low impact speeds or to prevent the anchor from falling off the end positions.
  • FIG. 4b shows a control sequence that is comparable to the initial phase with FIG. 4a.
  • the control sequence differs in that after the current has been clocked at c, the current is rapidly reduced by the operating state SSR and the magnetic energy is returned to the supply network. At d, the target-actual deviation that has occurred is corrected. At f it is switched off again via SSR. At g the current starts pulsing at the holding current level with which the armature is held in the end position.
  • the control sequence shown in FIG. 4b has the advantage in comparison to FIG. 4a that shorter flight times can be achieved.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Valve Device For Special Equipments (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)

Abstract

Dispositif de réglage électromagnétique dans lequel les bobinages sont divisés en au moins deux bobinages partiels et l'un des bobinages partiels est un bobinage de commande à excitation rapide et à basse constante de temps. L'un des bobinages partiels est utilisé pour l'alimentation en énergie pendant la phase de déplacement et pour le maintien de l'induit dans les positions terminales, tandis que le bobinage de commande à excitation rapide est utilisé pour la correction rapide de l'énergie de l'induit.
EP00971327A 1999-10-07 2000-10-06 Dispositif de reglage electromagnetique Withdrawn EP1155422A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19948489 1999-10-07
DE1999148489 DE19948489A1 (de) 1999-10-07 1999-10-07 Elektromagnetische Stelleinrichtung
PCT/EP2000/009792 WO2001026122A1 (fr) 1999-10-07 2000-10-06 Dispositif de reglage electromagnetique

Publications (1)

Publication Number Publication Date
EP1155422A1 true EP1155422A1 (fr) 2001-11-21

Family

ID=7924932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00971327A Withdrawn EP1155422A1 (fr) 1999-10-07 2000-10-06 Dispositif de reglage electromagnetique

Country Status (3)

Country Link
EP (1) EP1155422A1 (fr)
DE (1) DE19948489A1 (fr)
WO (1) WO2001026122A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10139362A1 (de) * 2001-08-20 2003-03-06 Heinz Leiber Elektromagnetischer Aktuator
JP4196940B2 (ja) * 2004-11-29 2008-12-17 トヨタ自動車株式会社 電磁駆動弁
CN101859627A (zh) * 2009-04-09 2010-10-13 杨泰和 具驱动及保持抽头线圈的电磁致动装置

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1033473B (de) * 1953-10-30 1958-07-03 Erich Herion Elektromagnetisches Schaltventil
CH523583A (fr) * 1971-04-23 1972-05-31 Lucifer Sa Dispositif de commande d'un électro-aimant
DE3409513A1 (de) * 1984-03-15 1985-09-19 Hager Electro GmbH + Co, 6601 Ensheim Elektromagnetische anordnung, insbesondere in einem schaltgeraet
DE19704808A1 (de) * 1997-02-08 1998-08-13 Bosch Gmbh Robert Vorrichtung zur Ansteuerung eines elektromagnetischen Verbrauchers
DE19723931A1 (de) * 1997-06-06 1998-12-10 Siemens Ag Einrichtung zum Steuern eines elektromechanischen Stellgeräts
EP0998623B1 (fr) * 1997-07-22 2002-12-18 LSP Innovative Automotive Systems GmbH Dispositif d'ajustement electromagnetique
DE19731381A1 (de) * 1997-07-22 1999-01-28 Heinz Leiber Elektromagnetische Stelleinrichtung
DE19741570A1 (de) * 1997-09-20 1999-03-25 Heinz Leiber Elektromagnetische Stelleinrichtung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0126122A1 *

Also Published As

Publication number Publication date
WO2001026122A1 (fr) 2001-04-12
DE19948489A1 (de) 2001-04-12

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