EP2870614A1 - Circuit electrique pour l'excitation d'au moins un electro-aimant - Google Patents
Circuit electrique pour l'excitation d'au moins un electro-aimantInfo
- Publication number
- EP2870614A1 EP2870614A1 EP13739761.8A EP13739761A EP2870614A1 EP 2870614 A1 EP2870614 A1 EP 2870614A1 EP 13739761 A EP13739761 A EP 13739761A EP 2870614 A1 EP2870614 A1 EP 2870614A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- inductor
- storage unit
- terminal
- energy storage
- electrical energy
- 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.)
- Granted
Links
- 230000005284 excitation Effects 0.000 title abstract description 7
- 238000004146 energy storage Methods 0.000 claims abstract description 55
- 239000003990 capacitor Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 7
- 239000000446 fuel Substances 0.000 description 13
- 230000005291 magnetic effect Effects 0.000 description 13
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 1
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
- H01F7/1816—Circuit arrangements for holding the operation of electromagnets or for holding the armature in attracted position with reduced energising current making use of an energy accumulator
Definitions
- the present invention relates to an electric circuit for energizing at least one electromagnet.
- the excitation of the electromagnet makes it possible to create a magnetic field that can be used to move an element made of a ferromagnetic material.
- the element made of a ferro-magnetic material is for example a needle moving in a body of the injector between a position in which it allows the passage of the fuel to a combustion chamber of the engine of the vehicle and a position in which it prevents the passage of fuel, the displacement of this element being effected under the effect of the magnetic field created by the electromagnet.
- a solenoid valve for example a canister bleed solenoid valve
- a DC motor of an electric actuator of the intake or exhaust circuit of the heat engine for example the control of a motor actuating an EGR valve or of any other valve of the intake circuit or exhaust, or
- This generator stage comprises in known manner an inductor, a capacitor and a diode, the inductor being charged by the available voltage and transferring the energy from this charge to the capacitor whose discharge provides the overvoltage.
- the invention aims to meet this need and it succeeds, according to one of its aspects, with the aid of an electrical circuit for the excitation of at least one electromagnet, comprising: an inductor forming ⁇ electromagnet, said inductor extending between a first terminal and a second terminal,
- switching system interposed between the inductor and the electric energy storage units, the switching system being configured to:
- the inductor is charged in the opposite way to the way it is charged during the second charge.
- the first charge of the inductor generates a magnetic field different from that generated during the second charging of the inductor. In this way, we make sure that the effect sought during the second charge of the inductor will not be reached during the first charge of the inductor.
- the movement of the needle may occur only during the second charge.
- the needle is for example by default in a position in abutment against a bearing surface and the magnetic field induced in the inductor during the first load exerts a force on the needle in the direction of the bearing surface.
- the first charge does not change the
- the magnetic field induced in the inductor can instead exert on the needle a force away from the bearing surface and thus allowing a fuel passage, which causes the opening of the injector.
- the inductance forming P electromagnet is for example a solenoid, having in particular an inductance value of between 1 mH and 10 mH.
- the switching system may comprise an H-bridge. This H-bridge may make it possible to reverse the direction of the positive current in the inductance forming the electromagnet.
- the H bridge may comprise two arms each extending between the same input terminal and the same output terminal, each arm comprising two switches between which a midpoint is connected to a respective terminal of the inductor.
- Each arm may comprise two controllable bidirectional switches or two controllable unidirectional switches.
- Each switch comprises for example a field effect transistor, bipolar, or IGBT type.
- Each terminal of the inductor can be directly connected to a midpoint of an arm.
- at least one intermediate component for example a resistor, may be interposed between a terminal of the inductor and a midpoint of an arm.
- the switching system may comprise at least a first switch disposed between the first electrical energy storage unit and the input terminal of the H bridge.
- This first switch is for example unidirectional and may be controllable or not.
- the switching system may comprise at least one second switch disposed between the second electrical energy storage unit and the input terminal of the H-bridge.
- This second switch is for example bidirectional and can be controllable or not.
- the first electrical energy storage unit may be a battery.
- the second unit Electrical energy storage can be a capacitor.
- the capacitor has for example a capacity of the order of one ⁇ .
- the second charge of the inductor can then be obtained by discharging the capacitor forming the second electrical energy storage unit.
- the first electrical energy storage unit can apply across the inductor during the first charge thereof a voltage of the order of 12 V or 14 V, the first storage unit of electrical energy being in particular the battery supplying the on-board network in the case of an application to a motor vehicle.
- the second electrical energy storage unit can apply across the inductor during the second load thereof a voltage between 50 V and 100 V, being in particular of the order of 80 V.
- Another object of the invention is, according to another of its aspects, a method of exciting at least one electromagnet using an electric circuit comprising, besides said electromagnet formed by an inductance extending between a first and a second terminal, a first electrical energy storage unit, a second electrical energy storage unit, and a switching system interposed between the electrical energy storage units and the inductor,
- the switching system is controlled so that a positive electric current supplied by the first electric energy storage unit flows from the second terminal to the first terminal of the inductor, so as to make a first load of said inductor,
- the switching system is controlled so that a positive electric current flowing from the second terminal to the first terminal of the inductor feeds the second electric energy storage unit, so as to transfer to it the energy accumulated in inductance, and
- the switching system is controlled so that a positive electric current supplied by the second electric energy storage unit flows from the first terminal to the second terminal of the inductor so as to effect a second charge of the inductance.
- the first charge of the inductor can allow the subsequent charging of the second electric power storage unit, so that the energy subsequently accumulated in the second electric power storage unit is transferred to the inductance during the second charging thereof.
- the above method makes it possible not to induce the same magnetic field when the inductor is powered by the first electric energy storage unit for the subsequent charging of the second electric storage unit and when using the The inductor is powered by the second electrical energy storage unit.
- the magnetic field induced when the inductor is powered by the second electrical energy storage unit serves to move an element such as a needle
- the supply of the inductor by the first storage unit electrical energy can subsequently charge the second power storage unit without moving this element.
- the voltage applied to the inductor by the first electrical energy storage unit during the first charging of the inductor may be lower than the voltage applied to the inductance by the second electrical energy storage unit during the second charge of the inductor, being in particular of the order of 12 or 14 V respectively and of the order of 80 V.
- a first electrical energy storage unit being a battery and a second electrical energy storage unit being a capacitor, in which case the second Inductance load is obtained by discharging the capacitor.
- FIG. 1 schematically represents an example of an electrical circuit according to an exemplary implementation of the invention
- Figures 2 to 4 show the electric circuit of Figure 1 at different stages for the excitation of ⁇ electromagnet.
- the example described relates to an electric circuit 1 for energizing an electromagnet for fuel injection in a motor vehicle.
- This example is not, however, limiting, as explained below.
- the circuit 1 is embedded on the vehicle and the excitation of the electromagnet can create a magnetic field moving a needle to control the injection of fuel into a combustion chamber of the engine of the vehicle.
- the invention is however not limited to this application.
- the circuit 1 comprises a first electrical energy storage unit 2, a second electrical energy storage unit 3, an inductance 4 forming an electromagnet, and a switching system 5.
- the first electrical energy storage unit 2 is in the example considered a battery supplying the on-board network of the vehicle while the second storage unit of electrical energy is a
- the inductor 4 is a solenoid having a first terminal 6 and a second terminal 7.
- the switching system 5 may comprise an H-bridge formed by two arms 8 which extend in the example described between an input terminal 9 of the H-bridge and a terminal of exit 10 which is here the mass.
- Each arm 8 comprises in the example described two electronic switches 11 and a current measuring member 12.
- Each electronic switch is for example a transistor such as a field effect transistor or an IGBT type transistor.
- the midpoint 13 of an arm 8 is connected to the first terminal 6 of the solenoid 4 while the midpoint 13 of the Another arm 8, called “second arm” thereafter, is connected to the second terminal 7 of the solenoid 4.
- the electronic switches 11 of the example of Figure 1 are designated respectively by SI, S2, S3 and S4, SI corresponding to the electronic switch 10 at the top of the first arm 8, S2 corresponding at the electronic switch 10 at the bottom of the first arm 8, S3 corresponding to the electronic switch 10 at the top of the second arm 8 and S4 corresponding to the electronic switch 10 at the bottom of the second arm 8.
- the switching system 5 also comprises in the example considered a first switch 15 interposed between the input terminal 9 of the H-bridge and the positive terminal of the first electrical energy storage unit 2 and a second switch 16 interposed between the input terminal 9 of the H-bridge and the positive terminal of the second electrical energy storage unit 3.
- the first switch 15 is non-controllable. It is also in this example unidirectional, being a diode. Still in this example, the second switch 16 is controllable. It can be bidirectional, being in particular a transistor.
- a control example of the switching system 5 is now described with reference to FIGS. 2 to 4 when it is desired to move the needle of the injector to inject fuel into a combustion chamber of the heat engine.
- the switching system 5 is first of all controlled so as to charge the solenoid 4 from the first electrical energy storage unit 2, as shown in FIG. 2.
- the switches S 2 and S 3 are thus controlled so that that the latter are passing so that the positive current ii provided by the first electrical energy storage unit 2 flows from the second terminal 7 to the first terminal 6 of the solenoid 4.
- the switch 16 is at this stage controlled to be open , so that only the first electrical energy storage unit 2 can feed the solenoid 4.
- This circulation of the positive current ii in the solenoid 4 induces a magnetic field B l .
- This magnetic field exerts for example a force on the needle of the injector which does not allow the displacement of this needle, for example because said force tends to move the needle beyond a position in which it is already in abutment.
- the current ii flowing in the solenoid can be measured in the measuring member 12 of the first arm 8. The solenoid 4 is thus magnetized.
- the switching system 5 is then controlled, as shown in FIG. 3, so that the energy previously accumulated in the solenoid is transferred to the capacitor 3.
- the switches S2 and S3 are then open while the switches S1 and S4 are open. are controlled to be in the on state, just like the switch 16. Due to this configuration of the switching system 5 and the choice of a diode to make the first switch 15, the positive current ii which circulated from the second terminal 7 to the first terminal 6 of the solenoid circulates in the capacitor 3, so as to load the latter.
- the current ii flowing in the solenoid can be measured in the measuring member 12 of the second arm 8. No current flows at this stage to the first electrical energy storage unit 2.
- the energy of the solenoid 4 is thus transferred. to the capacitor 3.
- the switching system 5 is controlled so that a positive current i 2 supplied by the second previously loaded electrical energy storage unit 3 flows from the first terminal 6 to the second terminal 7 of the solenoid.
- the switches S1, S4 and the switch 16 are on while the switches S2 and S3 are open.
- the current i 2 flowing in the solenoid can be measured in the measuring member 12 of the second arm 8
- the voltage applied by the second electric energy storage unit 3 to the terminals of the solenoid 4 is for example then of the order of 80 V.
- This power supply of the solenoid 4 by the second electrical energy storage unit 3 induces a magnetic field B 2 opposite to that of the field B 1 above. A force can then be exerted on the needle of the injector and move it into a position in which fuel is injected into the combustion chamber of the engine of the vehicle.
- the invention is not limited to the example of application to the fuel injection which has just been described.
- the invention may for example be applied to:
- a solenoid valve for example a canister bleed solenoid valve
- a DC motor of an electric actuator of the intake or exhaust circuit of the heat engine for example the control of a motor actuating an EGR valve or of any other valve of the intake circuit or exhaust, or
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Fuel-Injection Apparatus (AREA)
- Particle Accelerators (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1256371A FR2993093B1 (fr) | 2012-07-03 | 2012-07-03 | Circuit electrique pour l'excitation d'au moins un electro-aimant |
PCT/FR2013/051538 WO2014006313A1 (fr) | 2012-07-03 | 2013-07-01 | Circuit electrique pour l'excitation d'au moins un electro-aimant |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2870614A1 true EP2870614A1 (fr) | 2015-05-13 |
EP2870614B1 EP2870614B1 (fr) | 2017-11-01 |
Family
ID=47080662
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13739761.8A Active EP2870614B1 (fr) | 2012-07-03 | 2013-07-01 | Circuit electrique pour l'excitation d'au moins un electro-aimant |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP2870614B1 (fr) |
CN (1) | CN104603888A (fr) |
FR (1) | FR2993093B1 (fr) |
WO (1) | WO2014006313A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106504851B (zh) * | 2016-12-27 | 2018-12-18 | 宁波市镇海华泰电器有限公司 | 增压启动的交流电磁铁 |
CN106531397B (zh) * | 2016-12-27 | 2018-06-29 | 宁波市镇海华泰电器厂 | 电容储能的推拉交流电磁铁 |
CN106449008B (zh) * | 2016-12-27 | 2018-12-18 | 宁波市镇海华泰电器有限公司 | 储能启动的推拉交流电磁铁 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN2094792U (zh) * | 1990-10-19 | 1992-01-29 | 沈正 | 低温升高效节能动态电磁驱动器 |
US5936827A (en) | 1995-03-02 | 1999-08-10 | Robert Bosch Gmbh | Device for controlling at least one electromagnetic load |
US5717562A (en) | 1996-10-15 | 1998-02-10 | Caterpillar Inc. | Solenoid injector driver circuit |
FR2772972B1 (fr) * | 1997-12-19 | 2000-01-28 | Renault | Dispositif de commande d'un electroaimant |
CN2457791Y (zh) * | 2000-12-29 | 2001-10-31 | 金德成 | 储能式低压脉冲驱动控制电路 |
JP2002247864A (ja) * | 2001-02-15 | 2002-08-30 | Nec Kansai Ltd | 容量性素子の駆動方法 |
FR2831727A1 (fr) * | 2001-10-30 | 2003-05-02 | Renault | Dispositif de commande d'un actuateur piezo-electrique ultrasonore pilote electroniquement, et son procede de mise en oeuvre |
DE102007006179B4 (de) * | 2007-02-07 | 2008-10-16 | Continental Automotive Gmbh | Schaltungsanordnung und Verfahren zum Betreiben einer induktiven Last |
DE102008012942A1 (de) * | 2007-04-19 | 2008-10-23 | Volkswagen Ag | Vorrichtung und Verfahren zur Ansteuerung einer induktiven Last |
JP4434248B2 (ja) * | 2007-08-22 | 2010-03-17 | 株式会社デンソー | ピエゾアクチュエータ駆動装置 |
CA2740401C (fr) * | 2008-09-23 | 2014-11-18 | Aerovironment, Inc. | Modulation de largeur d'impulsion predictive pour machine a aimants permanents sans fer a haut rendement excitee pour un pont en h a triangle ouvert |
CN201549302U (zh) * | 2009-12-08 | 2010-08-11 | 东风汽车有限公司 | 直流电磁铁控制电路 |
-
2012
- 2012-07-03 FR FR1256371A patent/FR2993093B1/fr active Active
-
2013
- 2013-07-01 CN CN201380045821.0A patent/CN104603888A/zh active Pending
- 2013-07-01 EP EP13739761.8A patent/EP2870614B1/fr active Active
- 2013-07-01 WO PCT/FR2013/051538 patent/WO2014006313A1/fr active Application Filing
Non-Patent Citations (1)
Title |
---|
See references of WO2014006313A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2993093A1 (fr) | 2014-01-10 |
WO2014006313A1 (fr) | 2014-01-09 |
FR2993093B1 (fr) | 2014-06-20 |
CN104603888A (zh) | 2015-05-06 |
EP2870614B1 (fr) | 2017-11-01 |
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