EP2406805A1 - Actionneur électromagnétique à aimant permanent - Google Patents
Actionneur électromagnétique à aimant permanentInfo
- Publication number
- EP2406805A1 EP2406805A1 EP10715295A EP10715295A EP2406805A1 EP 2406805 A1 EP2406805 A1 EP 2406805A1 EP 10715295 A EP10715295 A EP 10715295A EP 10715295 A EP10715295 A EP 10715295A EP 2406805 A1 EP2406805 A1 EP 2406805A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- armature
- pallet
- electromagnetic actuator
- magnetic
- flux
- 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
- 230000005291 magnetic effect Effects 0.000 claims abstract description 32
- 230000004907 flux Effects 0.000 claims abstract description 21
- 239000004020 conductor Substances 0.000 claims abstract description 13
- 230000005294 ferromagnetic effect Effects 0.000 claims abstract description 3
- 229920006395 saturated elastomer Polymers 0.000 claims abstract 2
- 230000005415 magnetization Effects 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/32—Electromagnetic mechanisms having permanently magnetised part
- H01H71/321—Electromagnetic mechanisms having permanently magnetised part characterised by the magnetic circuit or active magnetic elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/24—Electromagnetic mechanisms
- H01H71/2436—Electromagnetic mechanisms with a holding and a releasing magnet, the holding force being limited due to saturation of the holding magnet
Definitions
- the present invention relates to a permanent magnet electromagnetic actuator conventionally comprising a magnetic armature, a movable pallet, a spring mechanism and electrical means comprising at least one conductor whose current makes it possible to vary the flux in the magnetic circuit in order to modify Balance between the magnetic force and that of the spring.
- the object of the invention is to provide an actuator with very high sensitivity, ie operating with a minimum value of rotation impellers, however generating at least one gap a flow variation sufficient to counterbalance the mechanical force and cause the displacement of palette.
- the basic idea of the IQhvention is to work on a flow-diversion scheme, the modification of the flux at IBntrefer or air gaps being obtained indirectly because of the configuration of the magnetic circuit in which an imbalance of the magnetic reluctances seen by Itaimant occurs. .
- the conductor or conductors capable of generating flow by passage of the current that runs (s) cooperates (nt) with a frame which is closed, and therefore does not contain dBntrefer but at least a dBequilibrium reluctance.
- the flow produced has an effect aimed at unbalancing said reluctances seen by miming, which rebalances the system and makes it possible to break - at the air gaps concerned by the flow variations - IB equilibrium with the mechanical restoring forces.
- the actuator of the invention comprising more precisely a permanent magnet, a ferromagnetic armature, a pallet creating at least one air gap with the armature and movable between at least one opening position and a closed position, mechanical means for recalling the pallet in the open position and at least one electrical conductor capable of generating a magnetic flux in the armature
- Itammature forms a closed magnetic loop in which the conductor or conductors are capable of generating a magnetic flux
- the magnet being disposed in the moving vane and generating flux in two parallel magnetic circuits, of which IQn comprises a portion of the armature and the other, formed in the vane, comprises a plug saturable zone or a zone of air.
- the principle of the structure of the invention consists in generating a strong variation of flux on the pole surface (s) of the pallet with a minimum of revolution-tors, thanks to the modification of the equilibrium of the reluctances obtained in IBsemble of said circuit.
- the pallet comprises two air gaps.
- the palette may be U-shaped whose legs are connected by Itaimant.
- IQn of the two magnetic circuits in parallel is constituted by Itàimant, two portions of the legs and the base of the U.
- the saturable plug area is then preferably located in said base of the U.
- the second circuit in parallel is then constituted, besides Itâimant, by the remaining portions of the jambs, air gaps, and the Itârmature section connecting the polar surfaces forming the air gaps with the pallet.
- the pallet may be U-shaped whose legs are placed on either side of the central branch comprising the magnet, their free ends forming two air gaps with a portion of the closed loop of the frame.
- the closed magnetic loop may either comprise a coil wound around a portion of the closed loop of the armature separate from the parallel magnetic circuits, or surround at least two power supply conductors of an electrical circuit.
- the closed loop of the magnetization can obviously take various forms, for example rectangular, circular, etc.
- a driver is wound around a portion of the state.
- a current flows in the coil, a magnetic flux is created in the magnetization, and consequently in the the latter which is part of the second magnetic circuit supplied by Itaimant flow in parallel with the base of the U.
- At least two conductive wires pass through the central window of the magnetization.
- Figure 1 schematically shows a first possible form of actuator for the invention, with a coil surrounding a portion of Itammature; and - Figure 2 shows the electromagnetic scheme equivalent to the structure of Figure 1.
- Itamature (1) forms a loop surmounted by the two lateral jambs (3, 4) of the U constituting the pallet (2).
- a permanent magnet (5) joins these two legs (3, 4).
- the armature loop (1) is provided with a coil (6) surrounding one of its branches. The base of the pallet
- the Rmat_gauche and Rmat_droit reluctances can represent a gap and / or a saturable magnetic material.
- the Renti and Rent2 reluctances represent the equivalent IBntrefer between the pallet and the armature.
- the coil When an electrical fault occurs, the coil generates a magnetic flux in the Rbas, R1 and R2 branch. This has the effect of increasing the value of R1 and R2. This is valid regardless of the direction of the current but the value of ampere-turns required depends on the direction of the current.
- the flux of the coil therefore tends to increase R1 (phi) * phi and increase R2 (phi) * phi. Seen from Itâimant, the previous balance is modified. The magnet then generates more magnetic flux in the circuit containing the base of the U (Rshunt_pal (phi1) * phi1 + Rpal_haut1 (phi1) * phi1 +
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Electromagnets (AREA)
- Linear Motors (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0951463A FR2942908B1 (fr) | 2009-03-09 | 2009-03-09 | Actionneur electromagnetique a aimant permanent |
| PCT/FR2010/050370 WO2010103218A1 (fr) | 2009-03-09 | 2010-03-05 | Actionneur électromagnétique à aimant permanent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2406805A1 true EP2406805A1 (fr) | 2012-01-18 |
| EP2406805B1 EP2406805B1 (fr) | 2015-01-28 |
Family
ID=41112527
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP10715295.1A Not-in-force EP2406805B1 (fr) | 2009-03-09 | 2010-03-05 | Actionneur électromagnétique à aimant permanent |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2406805B1 (fr) |
| FR (1) | FR2942908B1 (fr) |
| WO (1) | WO2010103218A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9859047B2 (en) | 2015-08-10 | 2018-01-02 | Hamilton Sundstrand Corporation | Solenoid actuators and solenoid actuated devices |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1513534A (fr) * | 1967-01-05 | 1968-02-16 | Cie De Construction Electr | Perfectionnements aux relais polarisés sensibles |
| DE3022168A1 (de) * | 1980-06-13 | 1981-12-24 | Schupa Elektro-GmbH + Co KG, 5885 Schalksmühle | Temperaturkompensation fuer hochempfindliche permanentmagnetische haftrelais |
| DE10140559A1 (de) * | 2001-08-17 | 2003-02-27 | Moeller Gmbh | Elektromagnetanordnung für einen Schalter |
-
2009
- 2009-03-09 FR FR0951463A patent/FR2942908B1/fr not_active Expired - Fee Related
-
2010
- 2010-03-05 EP EP10715295.1A patent/EP2406805B1/fr not_active Not-in-force
- 2010-03-05 WO PCT/FR2010/050370 patent/WO2010103218A1/fr not_active Ceased
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2010103218A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9859047B2 (en) | 2015-08-10 | 2018-01-02 | Hamilton Sundstrand Corporation | Solenoid actuators and solenoid actuated devices |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2406805B1 (fr) | 2015-01-28 |
| FR2942908B1 (fr) | 2011-04-08 |
| FR2942908A1 (fr) | 2010-09-10 |
| WO2010103218A1 (fr) | 2010-09-16 |
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