GB2278959A - Bistable latching solenoid actuator - Google Patents

Bistable latching solenoid actuator Download PDF

Info

Publication number
GB2278959A
GB2278959A GB9311202A GB9311202A GB2278959A GB 2278959 A GB2278959 A GB 2278959A GB 9311202 A GB9311202 A GB 9311202A GB 9311202 A GB9311202 A GB 9311202A GB 2278959 A GB2278959 A GB 2278959A
Authority
GB
United Kingdom
Prior art keywords
solenoid
armature
bistable
force
latching solenoid
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Withdrawn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
GB9311202A
Other versions
GB9311202D0 (en
Inventor
Richard David Harwood
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
Priority to GB9311202A priority Critical patent/GB2278959A/en
Publication of GB9311202D0 publication Critical patent/GB9311202D0/en
Publication of GB2278959A publication Critical patent/GB2278959A/en
Withdrawn legal-status Critical Current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
    • H01F7/16—Rectilinearly-movable armatures
    • H01F7/1607—Armatures entering the winding
    • H01F7/1615—Armatures or stationary parts of magnetic circuit having permanent magnet
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/22—Polarised relays
    • H01H51/2209—Polarised relays with rectilinearly movable armature
    • 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
    • H01F7/16—Rectilinearly-movable armatures
    • H01F2007/1669—Armatures actuated by current pulse, e.g. bistable actuators

Abstract

The actuator comprises a pair of coils 4, magnets 3, pole-pieces 5, 6 and an armature 2. In order to shift the armature, the coil adjacent the pole piece to which the armature is attracted is momentarily energised thereby cancelling the field due to the magnet and allowing the armature to be displaced towards the other pole piece where it is latched in place by the magnet. The actuator may be used in switching devices or electro-mechanical locks. <IMAGE>

Description

BISTABLE LATCHING SOLENOID This invention relates to a solenoid, capable of positive latching, in either the in or out state, without the requirement for sustained electrical supply.
In its broadest aspect the solenoid provides the basis for a range of Electrical switching devices (heavy duty latching relays), and a range of Electro-mechanical Lock mechanisms( e.g.
Domestic door locks electrically and/or remotely operated.)The utilisation of this invention would be in situations whereby it is undesirable or impracticable to maintain constant electromotive force to keep a solenoid in the in or out state, thus the device conserves energy and reduces risk of electrical originated fire Claim Attributes: The device obtains its moving force in either direction from permanent magnets.
The device remains stables latched in either the in or out state.
The device requires only a pulse(typically 5 milliseconds) at its particular rated voltage to operate.
The device can provide balanced or unbalanced forces in its latched positions.
The device can be manufactured with a range of holding forces from fraction of kilogram force to in excess of hundred kilogram force.
DESCRIPTION: The device utilise a closed magnetic loop, comprising of a moving armature (2.) and two pole pieces (5. & 6.) arranged as in figure 1. attached.
The static magnetic field utilised in the loop is provided by two sintered neo magnets. (3.) acting through the frame (1.) and pole pieces (5. & . 6).
The armature (2.) is attracted to its nearest pole piece where it remains in a stable condition. The attraction between armature and pole piece providing the latching force.
To change the state of the solenoid the coil surrounding the pole piece that the armature is currently attracted to is energised with a brief electrical pulse.This causes the temporary nullification of the magnetic field at the pole piece.
The remainder of the frame(l.) and the opposite pole piece remain saturated with magnetism, this cause the armature (2.) to become attracted to the opposite pole piece. The magnetic force is so strong that it provides all of the power required to move the armature under its design load and then to hold the armature firmly to the pole piece, thus latching the solenoid in its new state.
Any further change of state is effected similarly.
The device may be manufactured to any resonable scale to suit its particular appliction.

Claims (7)

Cl AIMS
1. A Bistable Latching Solenoid. Comprising a steel (or other magnetically conductive material,) frame together with, two specifically shaped pole preceptors, one of which provides a bearing bore -Located between (he two pole receptors is a cyliiidrical armature, the armature is located within a plastic guide which includes a former for two coil windings.The ainiatul e has means to exert a constant and predetermined pressure via an integral spring.
?'here are two magnets (sintered neodynium iron boron) located within the frame to provide ilie magnetic forceps.
2. A Bistable Latching Solenoid as claimed in Claim 1. where the device obtains the majority of its motive force from permanent magnets ,sintered neodymium iron boron type in conjunction with a magnetic force derived from an opposing coil.
3 A Bistable Latching Solenoid as Claimed in claim 1 or Claim 2 wherein the specially shaped pole preceptors provide a significant increase in magnetic attraction allowing the solenoid to remain securely latched in or out.
4. A Bistable Latching Solenoid as claimed in Claim 1 ,Claim 2 or (laim 3 whereby the device requires only a pulse at its rated voltage (typically 5 milliseconds) to change state from in to out.
5. A Bistable Lntching Solenoid as Claimed in any preceding claim, whereby the latching force may be greater, equal lo or less than the force required to unlatch
6. A Bistable Latching Solenoid as claimed in any of the preceding claims, whereby tlle solenoid may be easily modified by changing magnet size to provide a range of latching forces, from fraction of a kilogram to hundreds of kilogram.
7. A Bistable Latching Solenoid as Claimed in any of the preceding claims, whereby the armature is internally spling loaded to give precise control over '1 lold On' force
GB9311202A 1993-05-29 1993-05-29 Bistable latching solenoid actuator Withdrawn GB2278959A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9311202A GB2278959A (en) 1993-05-29 1993-05-29 Bistable latching solenoid actuator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9311202A GB2278959A (en) 1993-05-29 1993-05-29 Bistable latching solenoid actuator

Publications (2)

Publication Number Publication Date
GB9311202D0 GB9311202D0 (en) 1993-07-14
GB2278959A true GB2278959A (en) 1994-12-14

Family

ID=10736393

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9311202A Withdrawn GB2278959A (en) 1993-05-29 1993-05-29 Bistable latching solenoid actuator

Country Status (1)

Country Link
GB (1) GB2278959A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005006371A1 (en) * 2003-07-10 2005-01-20 Siemens Aktiengesellschaft Electromagnetic switching device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202886A (en) * 1962-01-11 1965-08-24 Bulova Watch Co Inc Bistable solenoid
US3634735A (en) * 1969-04-03 1972-01-11 Mikio Komatsu Self-holding electromagnetically driven device
US3728654A (en) * 1970-09-26 1973-04-17 Hosiden Electronics Co Solenoid operated plunger device
US3895331A (en) * 1974-05-20 1975-07-15 Richdel Latching solenoid
WO1981001626A1 (en) * 1979-12-03 1981-06-11 M Gottschall A two position mechanism
GB1591471A (en) * 1977-06-18 1981-06-24 Hart J C H Electromagnetic actuators
US4829947A (en) * 1987-08-12 1989-05-16 General Motors Corporation Variable lift operation of bistable electromechanical poppet valve actuator

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3202886A (en) * 1962-01-11 1965-08-24 Bulova Watch Co Inc Bistable solenoid
US3634735A (en) * 1969-04-03 1972-01-11 Mikio Komatsu Self-holding electromagnetically driven device
US3728654A (en) * 1970-09-26 1973-04-17 Hosiden Electronics Co Solenoid operated plunger device
US3895331A (en) * 1974-05-20 1975-07-15 Richdel Latching solenoid
GB1591471A (en) * 1977-06-18 1981-06-24 Hart J C H Electromagnetic actuators
WO1981001626A1 (en) * 1979-12-03 1981-06-11 M Gottschall A two position mechanism
US4829947A (en) * 1987-08-12 1989-05-16 General Motors Corporation Variable lift operation of bistable electromechanical poppet valve actuator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005006371A1 (en) * 2003-07-10 2005-01-20 Siemens Aktiengesellschaft Electromagnetic switching device
CN100461324C (en) * 2003-07-10 2009-02-11 西门子公司 Electromagnetic switching device
US7696846B2 (en) 2003-07-10 2010-04-13 Siemens Aktiengesellschaft Electromagnetic switching device

Also Published As

Publication number Publication date
GB9311202D0 (en) 1993-07-14

Similar Documents

Publication Publication Date Title
US11837402B2 (en) Electromagnet-switchable permanent magnet device
US8461951B2 (en) Bistable magnetic actuators
US4928028A (en) Proportional permanent magnet force actuator
JP2000268683A (en) Operating device for switch
US7481415B2 (en) Multi-force actuator valve with multiple operating modes
EP1596402A3 (en) Electromagnetic actuator and control
US3218523A (en) Electromagnetic device having a permanent magnet armature
US5554961A (en) Energy efficient electromagnetic circuit
US20050030136A1 (en) Method for controlling flux of electromagnet and an electromagnet for carrying out sad method (variants)
CN111902902A (en) Electromagnetic relay
WO1985004044A1 (en) Electromagnetic actuator apparatus
US6906605B2 (en) Electromagnet system for a switch
US4752757A (en) Electromagnetic actuator
GB2278959A (en) Bistable latching solenoid actuator
CN201274237Y (en) Permanent magnet lock type circuit breaker operation mechanism without friction obstacle during switching on and switching off
RU2310941C1 (en) Electromagnetic operating mechanism for high-voltage vacuum circuit breaker
US11640887B2 (en) Mechanical latching system kit for a medium voltage contactor
RU82929U1 (en) ELECTROMAGNETIC VACUUM CIRCUIT BREAKER
US3437885A (en) Electromagnet
KR20000056768A (en) A permant magnet excited linear actuator
KR100231067B1 (en) Electronic switch using push-pull solenoid
CN210403613U (en) Direct current relay
KR900003288Y1 (en) Electromagnetic actuator
JPH09293443A (en) Polar relay
JP2023028684A (en) Electromagnetic valve device with self-holding plunger

Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)