FR2444327A1 - Electromagnet with core of varying cross section - has non-magnetic complementary sleeve portions to provide solid varying air gap - Google Patents

Electromagnet with core of varying cross section - has non-magnetic complementary sleeve portions to provide solid varying air gap

Info

Publication number
FR2444327A1
FR2444327A1 FR7835734A FR7835734A FR2444327A1 FR 2444327 A1 FR2444327 A1 FR 2444327A1 FR 7835734 A FR7835734 A FR 7835734A FR 7835734 A FR7835734 A FR 7835734A FR 2444327 A1 FR2444327 A1 FR 2444327A1
Authority
FR
France
Prior art keywords
core
electromagnet
air gap
varying
frusto
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
Application number
FR7835734A
Other languages
French (fr)
Other versions
FR2444327B1 (en
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.)
ROBION JEAN MARIE
Original Assignee
ROBION JEAN MARIE
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 ROBION JEAN MARIE filed Critical ROBION JEAN MARIE
Priority to FR7835734A priority Critical patent/FR2444327A1/en
Publication of FR2444327A1 publication Critical patent/FR2444327A1/en
Application granted granted Critical
Publication of FR2444327B1 publication Critical patent/FR2444327B1/fr
Granted 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
    • H01F7/13—Electromagnets; Actuators including electromagnets with armatures characterised by pulling-force characteristics
    • 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
    • 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
    • H01F7/1653—Magnetic circuit having axially spaced pole-pieces
    • 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
    • H01F7/081—Magnetic constructions
    • H01F2007/085—Yoke or polar piece between coil bobbin and armature having a gap, e.g. filled with nonmagnetic material

Abstract

The electromagnet has a tubular armature (10) which by end plates (12a, 12b) with central holes (12e) through which a core (15) is slidable. The armature (10) contains an annular coil (13) with terminals (14a, 14b) projecting through one end plate (12b). The core (15) is cylindrical with two enlarged frusto-conical end portions (15a, 15b) tapering in the same direction. The core, armature (10) and end plates are all at high permeability low remanence magnetic material such as iron, steel, cobalt or nickel. The frusto-conical portions (15a, 15b) are rendered cylindrical by surrounding non-magetic sleeves (16a, 16b) of e.g. electrolytic copper or plastics such as polyester to provide a variable air gap. The core is biassed by surrounding spring (17) and has a central cylindrical portion equal in length to the core stroke. Various shaped core end portions may be used in place of the frusto-conical portions (15a, 15b).
FR7835734A 1978-12-15 1978-12-15 Electromagnet with core of varying cross section - has non-magnetic complementary sleeve portions to provide solid varying air gap Granted FR2444327A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7835734A FR2444327A1 (en) 1978-12-15 1978-12-15 Electromagnet with core of varying cross section - has non-magnetic complementary sleeve portions to provide solid varying air gap

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7835734A FR2444327A1 (en) 1978-12-15 1978-12-15 Electromagnet with core of varying cross section - has non-magnetic complementary sleeve portions to provide solid varying air gap

Publications (2)

Publication Number Publication Date
FR2444327A1 true FR2444327A1 (en) 1980-07-11
FR2444327B1 FR2444327B1 (en) 1981-07-24

Family

ID=9216321

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7835734A Granted FR2444327A1 (en) 1978-12-15 1978-12-15 Electromagnet with core of varying cross section - has non-magnetic complementary sleeve portions to provide solid varying air gap

Country Status (1)

Country Link
FR (1) FR2444327A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2471657A1 (en) * 1979-12-01 1981-06-19 Lucas Industries Ltd ELECTROMAGNETIC ACTUATION DEVICE

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR364953A (en) * 1906-03-12 1906-08-31 John William Holman electromagnets
US2448727A (en) * 1944-03-27 1948-09-07 Warner Electric Brake Mfg Co Solenoid with armature
FR1200464A (en) * 1958-06-24 1959-12-22 alternating current electromagnet, especially for solenoid valves
FR1294701A (en) * 1956-03-20 1962-06-01 Improvement in electromagnets
DE1165751B (en) * 1959-07-15 1964-03-19 Siemens Schuckertwerke Gmbh Plunger armature electromagnet with wavy tensile force curve
US3588769A (en) * 1969-11-18 1971-06-28 Westinghouse Electric Corp Armature for electromagnetic device
DE2433775A1 (en) * 1973-07-17 1975-05-28 Elektro App Werke Veb High power electromagnet of defined force and displacement character - uses variable pole areas for magnetic force dependent on stroke and pole area

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR364953A (en) * 1906-03-12 1906-08-31 John William Holman electromagnets
US2448727A (en) * 1944-03-27 1948-09-07 Warner Electric Brake Mfg Co Solenoid with armature
FR1294701A (en) * 1956-03-20 1962-06-01 Improvement in electromagnets
FR1200464A (en) * 1958-06-24 1959-12-22 alternating current electromagnet, especially for solenoid valves
DE1165751B (en) * 1959-07-15 1964-03-19 Siemens Schuckertwerke Gmbh Plunger armature electromagnet with wavy tensile force curve
US3588769A (en) * 1969-11-18 1971-06-28 Westinghouse Electric Corp Armature for electromagnetic device
DE2433775A1 (en) * 1973-07-17 1975-05-28 Elektro App Werke Veb High power electromagnet of defined force and displacement character - uses variable pole areas for magnetic force dependent on stroke and pole area

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2471657A1 (en) * 1979-12-01 1981-06-19 Lucas Industries Ltd ELECTROMAGNETIC ACTUATION DEVICE

Also Published As

Publication number Publication date
FR2444327B1 (en) 1981-07-24

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Legal Events

Date Code Title Description
ST Notification of lapse