GB1594578A - Electromagnetic actuator circuits - Google Patents
Electromagnetic actuator circuits Download PDFInfo
- Publication number
- GB1594578A GB1594578A GB4980076A GB4980076A GB1594578A GB 1594578 A GB1594578 A GB 1594578A GB 4980076 A GB4980076 A GB 4980076A GB 4980076 A GB4980076 A GB 4980076A GB 1594578 A GB1594578 A GB 1594578A
- Authority
- GB
- United Kingdom
- Prior art keywords
- armature
- circuit
- coil
- switch
- coils
- 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
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
- 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
- H01F7/121—Guiding or setting position of armatures, e.g. retaining armatures in their end position
- H01F7/122—Guiding or setting position of armatures, e.g. retaining armatures in their end position by permanent magnets
-
- 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
- H01H71/04—Means for indicating condition of the switching device
- H01H2071/048—Means for indicating condition of the switching device containing non-mechanical switch position sensor, e.g. HALL sensor
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Linear Motors (AREA)
Description
(54) IMPROVEMENTS IN AND RELATING TO
ELECTROMAGNETIC ACTUATOR CIRCUITS
(71) I, JOHN CHARLES
HUMPHREYS HART, a British subject, of "Dalriada", Taynuilt, Argyll, PA35 1JE (formerly of Waterfield, Baslow Road,
Bakewell, Derbyshire), do hereby declare the invention for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly described in and by the following statement:- The invention relates to actuator circuits, to circuits suitable for actuating bistable electromagnetic actuators incorporating latching, such as permanent magnet latching.
According to the invention there is provided an actuating circuit for alternate energisation u of two coils of a bistable electro magnetic actuator device wherein two Hall Effect switch devices, connected one in such energisation circuit for the coils, are so located with respect to permanent magnet means moveable with or located adjacent so as to be effected by movement of an armature of the electromagnetic device, that when eithercoil is energised to move the armature from one to its other position such movement of the armature causes the respective Hall
Effect switch device to disconnect the energisation circuit for that coil.
The permanent magnet means may be located to move with the armature and the
Hall Effect switch devices may be located such that the permanent magnet means is adjacent one such switch device in one position thereof and is adjacent the other such switch device in the other position thereof.
Alternatively the permanent magnet means may provide the driving force for movement of the armature, being located centrally between the two coils, and the
Hall Effect switch devices are located one adjacent each of the two end positions of travel of the armature.
The actuating circuit may include timing means arranged to disconnect the energisation circuit for the coils should the
Hall Effect switch devices not disconnect such circuit within a predetermined time
from connection of such energisation
circuit.
The actuating circuit may also include
zener diodes connected so as to cut off the
current flow to the coils upon
disconnection of the energisation circuit.
The foregoing and further features of the
invention may be more readily understood
from the following description of two
preferred embodiments thereof, by way of
example, with reference to the
accompanying drawing in which there is
shown a schematic representation of an
actuator with alternative arrangements of
Hall Effect switches for controlling the
energisation circuit thereof.
Referring now to the drawing there is
shown an actuator which comprises a
cylindrical housing 10 of magnetisable material containing an armature 11 slidably
mounted between end stops 12a and 12b of
magnetisable material. A radially
magnetised magnet means 13 is centrally
located between coils 14 and 15. The
armature 11 is maintained in the position shown by a magnetic field of magnet 13
flowing from magnet 13 around housing 10,
end stop 12a and armature 11. To move
armature 11 to the right coil 14 is energised to oppose the magnetic flux and a new flux path including end stop 12b is closed and maintains armature 11 to the right as shown in the drawing.
The armature 11 is mounted on a shaft 16
and in one embodiment of the invention the
shaft 16 carries or is formed with a
permanent magnet 17 which is located
adjacent a Hall Effect switch 18 when
armature 11 is in the left position and is
located adjacent Hall Effect switch 19 when
armature 11 is in the right position as shown
in the drawing. The switch 19 which is
normally closed is connected to be in the
energisation circuit for coil 14 so that when
such coil is energised and armature 11
moves to the right the proximity of
permanent magnet 17 to switch 19 causes
such switch 19 to open and disconnect the
energisation circuit for coil 14. Similarly the
switch 18 is connected in the energisation
circuit for coil 15.The arrangement of switches 18 and 19 and the permanent magnet 17 can be utilised with any form of bistable electromagnet actuator with latching at each stable position whether or not such latching is magnetic.
In a further embodiment of the invention respective Hall Effect switches 20 and 21 can be located in end stops 12a and 12b. In this arrangement switch 21 is connected with coil 14 and switch 20 with coil 15. Coil 14 is energised to move armature 11 to the right and when such armature has reached a predetermined position towards the right, which position can be adjusted by controlling the flux magnitude which actuates switch 21, the switch 21 is actuated to open the energisation circuit for coil 14.
Similarly switch 20 acts on the energisation circuit for coil 15 when armature 11 is to be moved to the right.
In both of the embodiments illustrated the Hall Effect switches may be devices commercially available as MICRO
SWITCH (Registered Trade Mark) devices type SS from Honeywell Corporation of
Freeport, Illinois 61032, United States of
America.
Also in both embodiments timers may be included in the coil energisation circuits so that such circuits are disconnected after a predetermined time so as to prevent the coils burning out if the armature becomes stuck in one position and hence the respective Hall Effect switch is not opened.
Also zener diodes may be included in the circuits to reduce residual current flow in the coils after disconnection of the coils, so minimising coil temperature rise.
WHAT I CLAIM IS:
1. An actuating circuit for alternate energisation of two coils of a bistable electro magnetic actuator device wherein two Hall Effect switch devices, connected one in such energisation circuit for the coils, are so located with respect to permanent magnet means moveable with or located adjacent so as to be effected by movement of an armature of the electromagnetic device, that when either coil is energised to move the armature from one to its other position such movement of the armature causes the respective Hall
Effect switch device to disconnect the energisation circuit for that coil.
2. An actuating circuit as claimed in claim 1 wherein the permanent magnet means is located to move with the armature and the Hall Effect switch devices are located so that the permanent magnet means is adjacent one such switch device in one position thereof and is adjacent the other such switch device in the other position thereof.
3. An actuating circuit as claimed in claim 1 wherein the permanent magnet means provides the driving force for movement of the armature, being located centrally between the two coils, and the
Hall Effect switch devices are located one adjacent each of the two end positions of travel of the armature.
4. An actuating circuit as claimed in any preceding claim wherein timing means is arranged to disconnect the energisation circuit for the coils should the Hall Effect switch devices not disconnect such circuit within a predetermined time from connection of such energisation circuit.
5. An actuating circuit as claimed in any preceding claim including zener diodes connected so as to reduce residual current flow in the coils upon disconnection of the energisation circuit.
6. An actuating circuit for an electromagnetic actuator substantially as hereinbefore described with reference to the accompanying drawing.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (6)
1. An actuating circuit for alternate energisation of two coils of a bistable electro magnetic actuator device wherein two Hall Effect switch devices, connected one in such energisation circuit for the coils, are so located with respect to permanent magnet means moveable with or located adjacent so as to be effected by movement of an armature of the electromagnetic device, that when either coil is energised to move the armature from one to its other position such movement of the armature causes the respective Hall
Effect switch device to disconnect the energisation circuit for that coil.
2. An actuating circuit as claimed in claim 1 wherein the permanent magnet means is located to move with the armature and the Hall Effect switch devices are located so that the permanent magnet means is adjacent one such switch device in one position thereof and is adjacent the other such switch device in the other position thereof.
3. An actuating circuit as claimed in claim 1 wherein the permanent magnet means provides the driving force for movement of the armature, being located centrally between the two coils, and the
Hall Effect switch devices are located one adjacent each of the two end positions of travel of the armature.
4. An actuating circuit as claimed in any preceding claim wherein timing means is arranged to disconnect the energisation circuit for the coils should the Hall Effect switch devices not disconnect such circuit within a predetermined time from connection of such energisation circuit.
5. An actuating circuit as claimed in any preceding claim including zener diodes connected so as to reduce residual current flow in the coils upon disconnection of the energisation circuit.
6. An actuating circuit for an electromagnetic actuator substantially as hereinbefore described with reference to the accompanying drawing.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4980076A GB1594578A (en) | 1977-10-21 | 1977-10-21 | Electromagnetic actuator circuits |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB4980076A GB1594578A (en) | 1977-10-21 | 1977-10-21 | Electromagnetic actuator circuits |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1594578A true GB1594578A (en) | 1981-07-30 |
Family
ID=10453580
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4980076A Expired GB1594578A (en) | 1977-10-21 | 1977-10-21 | Electromagnetic actuator circuits |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB1594578A (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4450427A (en) * | 1981-12-21 | 1984-05-22 | General Electric Company | Contactor with flux sensor |
US4559971A (en) * | 1983-02-22 | 1985-12-24 | Eaton Corporation | Single coil vacuum/vent valve |
GB2207812A (en) * | 1987-08-07 | 1989-02-08 | Out Board Electronics Limited | Electromagnetic actuators |
GB2259188A (en) * | 1991-08-30 | 1993-03-03 | Mannesmann Ag | Detecting the operation of an electromagnetic actuator |
GB2350724A (en) * | 1999-05-29 | 2000-12-06 | Alstom Uk Ltd | Magnetic actuator arrangement |
EP1132929A1 (en) * | 2000-03-10 | 2001-09-12 | ABBPATENT GmbH | Permanent magnetic drive for an electrical switching device |
CN105049573A (en) * | 2015-08-17 | 2015-11-11 | 浙江触捷光电科技有限公司 | Cellphone sensor testing device convenient to operate |
GB2567894A (en) * | 2017-10-31 | 2019-05-01 | Elaut Nv | Improvements to the operation of electromagnetic actuators |
-
1977
- 1977-10-21 GB GB4980076A patent/GB1594578A/en not_active Expired
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4450427A (en) * | 1981-12-21 | 1984-05-22 | General Electric Company | Contactor with flux sensor |
US4559971A (en) * | 1983-02-22 | 1985-12-24 | Eaton Corporation | Single coil vacuum/vent valve |
GB2207812A (en) * | 1987-08-07 | 1989-02-08 | Out Board Electronics Limited | Electromagnetic actuators |
GB2207812B (en) * | 1987-08-07 | 1991-02-20 | Out Board Electronics Limited | Apparatus for magnetically controlling movement of a device along a path |
GB2259188A (en) * | 1991-08-30 | 1993-03-03 | Mannesmann Ag | Detecting the operation of an electromagnetic actuator |
GB2350724A (en) * | 1999-05-29 | 2000-12-06 | Alstom Uk Ltd | Magnetic actuator arrangement |
GB2350724B (en) * | 1999-05-29 | 2003-12-03 | Alstom Uk Ltd | Magnetic actuator arrangement |
EP1132929A1 (en) * | 2000-03-10 | 2001-09-12 | ABBPATENT GmbH | Permanent magnetic drive for an electrical switching device |
CN105049573A (en) * | 2015-08-17 | 2015-11-11 | 浙江触捷光电科技有限公司 | Cellphone sensor testing device convenient to operate |
GB2567894A (en) * | 2017-10-31 | 2019-05-01 | Elaut Nv | Improvements to the operation of electromagnetic actuators |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
CSNS | Application of which complete specification have been accepted and published, but patent is not sealed |