GB1453823A - Electromagnetic force applying device - Google Patents

Electromagnetic force applying device

Info

Publication number
GB1453823A
GB1453823A GB4707372A GB4707372A GB1453823A GB 1453823 A GB1453823 A GB 1453823A GB 4707372 A GB4707372 A GB 4707372A GB 4707372 A GB4707372 A GB 4707372A GB 1453823 A GB1453823 A GB 1453823A
Authority
GB
United Kingdom
Prior art keywords
lever
armature
core
thermal expansion
force
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
Application number
GB4707372A
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.)
ZF International UK Ltd
Original Assignee
Lucas Industries Ltd
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 Lucas Industries Ltd filed Critical Lucas Industries Ltd
Priority to GB4707372A priority Critical patent/GB1453823A/en
Priority to FR7336329A priority patent/FR2203146B1/fr
Priority to IT5305873A priority patent/IT994395B/en
Priority to DE19732351095 priority patent/DE2351095A1/en
Priority to JP11405673A priority patent/JPS4995669A/ja
Priority to US05/527,309 priority patent/US3955164A/en
Publication of GB1453823A publication Critical patent/GB1453823A/en
Expired 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
    • H01F7/1638—Armatures not entering the winding
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L11/00—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00
    • G01L11/004—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by the use of counterbalancing forces
    • G01L11/008—Measuring steady or quasi-steady pressure of a fluid or a fluent solid material by means not provided for in group G01L7/00 or G01L9/00 by the use of counterbalancing forces electrostatic or electromagnetic counterbalancing forces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0033—Transmitting or indicating the displacement of bellows by electric, electromechanical, magnetic, or electromagnetic means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
    • G01L9/0033—Transmitting or indicating the displacement of bellows by electric, electromechanical, magnetic, or electromagnetic means
    • G01L9/0038—Transmitting or indicating the displacement of bellows by electric, electromechanical, magnetic, or electromagnetic means using variations in capacitance
    • 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
    • H01F7/13—Electromagnets; Actuators including electromagnets with armatures characterised by pulling-force characteristics

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Measuring Fluid Pressure (AREA)

Abstract

1453823 Measuring pressure electrically LUCAS INDUSTRIES Ltd 8 Oct 1973 [12 Oct 1972] 47073/72 Heading G1N [Also in Division H1] An electromagnet comprises, Fig. 1 (not shown) an annular gapped core with a winding producing a radial field in the gap to draw an annular armature thereinto with a force varying with ambient temperature; the armature and core being of materials e.g. soft iron and nickel iron having differing coefficient of thermal expansion, to apply differing forces at differing temperatures; and the device being applicable to a force balance fluid-pressure transducer wherein a fluid bellows subject to thermal expansion acts on a lever against an electromagnetic force applied thereto. The energization is controlled in response to deflections of the lever to achieve balance. A pair of such electromagnets 20, 21 Fig. 2 have armatures 20a, 21a bearing on lever 22 in opposite directions and have double windings; one of each being constantly polarized and the others being series oppositely connected to apply unbalanced deflections to the lever to counterbalance the force applied by flexible resilient evacuated bellows 23 subject to external pressure to be measured. Thermal expansion increases the force on the lever with temperature for a given pressure, and accurate choice of gap and armature proportions and core and armature materials produce linear response; the lever position being capacitively sensed at 24 to control the excitation current of the magnets over circuit 25. The direction of compensation is reversible by making the armature of nickel iron and the core of soft iron.
GB4707372A 1972-10-12 1972-10-12 Electromagnetic force applying device Expired GB1453823A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB4707372A GB1453823A (en) 1972-10-12 1972-10-12 Electromagnetic force applying device
FR7336329A FR2203146B1 (en) 1972-10-12 1973-10-11
IT5305873A IT994395B (en) 1972-10-12 1973-10-11 ELECTROMAGNETIC DEVICE FOR APPLICATION OF FORCES AND TRANSDUCER INCLUDING IT
DE19732351095 DE2351095A1 (en) 1972-10-12 1973-10-11 ELECTROMAGNETIC DEVICE FOR GENERATING A FORCE
JP11405673A JPS4995669A (en) 1972-10-12 1973-10-12
US05/527,309 US3955164A (en) 1972-10-12 1974-11-26 Electromagnetic force applying device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4707372A GB1453823A (en) 1972-10-12 1972-10-12 Electromagnetic force applying device

Publications (1)

Publication Number Publication Date
GB1453823A true GB1453823A (en) 1976-10-27

Family

ID=10443621

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4707372A Expired GB1453823A (en) 1972-10-12 1972-10-12 Electromagnetic force applying device

Country Status (5)

Country Link
JP (1) JPS4995669A (en)
DE (1) DE2351095A1 (en)
FR (1) FR2203146B1 (en)
GB (1) GB1453823A (en)
IT (1) IT994395B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8514544D0 (en) * 1985-06-08 1985-07-10 Lucas Ind Plc Electromagnetic actuator

Also Published As

Publication number Publication date
JPS4995669A (en) 1974-09-11
FR2203146B1 (en) 1976-10-01
FR2203146A1 (en) 1974-05-10
DE2351095A1 (en) 1974-04-18
IT994395B (en) 1975-10-20

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee