GB430883A - Improvements in and relating to electro-magnets - Google Patents

Improvements in and relating to electro-magnets

Info

Publication number
GB430883A
GB430883A GB33399/34A GB3339934A GB430883A GB 430883 A GB430883 A GB 430883A GB 33399/34 A GB33399/34 A GB 33399/34A GB 3339934 A GB3339934 A GB 3339934A GB 430883 A GB430883 A GB 430883A
Authority
GB
United Kingdom
Prior art keywords
alternating
holding
main coil
armature
excited
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
GB33399/34A
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.)
British Thomson Houston Co Ltd
Original Assignee
British Thomson Houston Co 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 British Thomson Houston Co Ltd filed Critical British Thomson Houston Co Ltd
Publication of GB430883A publication Critical patent/GB430883A/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
    • H01F7/10—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current
    • H01F7/12—Electromagnets; Actuators including electromagnets with armatures specially adapted for alternating current having anti-chattering arrangements

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electromagnets (AREA)

Abstract

430,883. Electromagnets. BRITISH THOMSON - HOUSTON CO., Ltd., Crown House, Aldwych, London. Nov. 20, 1934, No. 33399. Convention date, Nov. 22, 1933. [Class 35] [See also Group XXXVII] For holding the armature 4 of an electromagnet 1 such as an electromagnetic contactor in the attracted position, one or more auxiliary windings 4 located in slots or grooves on the magnet polepieces are excited by continuous current. The invention is applicable to magnets in which the main coil 3 is supplied with alternating or continuous current and arrangements may be provided whereby in the attracted position of the armature the holding coil 4 is excited and the main coil is disconnected. In order to prevent the production of alternating E.M.F's in the holding winding, when the main coil is energized with alternating current, two coils such as 4 may be provided both located on the upper fixed pole or one on the lower pole and connected in series in such a way that while their magnetomotive forces are additive the alternating E.M.F's induced in the two coils oppose each other. The holding winding may be fed from the main alternating current source through a dry rectifier.
GB33399/34A 1933-11-22 1934-11-20 Improvements in and relating to electro-magnets Expired GB430883A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR430883X 1933-11-22

Publications (1)

Publication Number Publication Date
GB430883A true GB430883A (en) 1935-06-26

Family

ID=8899316

Family Applications (1)

Application Number Title Priority Date Filing Date
GB33399/34A Expired GB430883A (en) 1933-11-22 1934-11-20 Improvements in and relating to electro-magnets

Country Status (1)

Country Link
GB (1) GB430883A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2552261A1 (en) * 1983-09-19 1985-03-22 Elmwood Sensors DEVICE, MAGNETICALLY ACTUATED AND CAPABLE OF A CUT DELAY, FOR CONTROLLING THE PASSAGE OF AN ALTERNATING CURRENT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2552261A1 (en) * 1983-09-19 1985-03-22 Elmwood Sensors DEVICE, MAGNETICALLY ACTUATED AND CAPABLE OF A CUT DELAY, FOR CONTROLLING THE PASSAGE OF AN ALTERNATING CURRENT

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