US1385038A - Rctor for magneto-electric machines - Google Patents

Rctor for magneto-electric machines Download PDF

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Publication number
US1385038A
US1385038A US261430A US26143018A US1385038A US 1385038 A US1385038 A US 1385038A US 261430 A US261430 A US 261430A US 26143018 A US26143018 A US 26143018A US 1385038 A US1385038 A US 1385038A
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United States
Prior art keywords
electric machines
magneto
rctor
pole
poles
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Expired - Lifetime
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US261430A
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Bohlj Jacques
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FIPEM SCINTILLA
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FIPEM SCINTILLA
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Priority to US261430A priority Critical patent/US1385038A/en
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/27—Rotor cores with permanent magnets
    • H02K1/2706—Inner rotors
    • H02K1/272—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis
    • H02K1/274—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets
    • H02K1/2753—Inner rotors the magnetisation axis of the magnets being perpendicular to the rotor axis the rotor consisting of two or more circumferentially positioned magnets the rotor consisting of magnets or groups of magnets arranged with alternating polarity
    • H02K1/278—Surface mounted magnets; Inset magnets

Definitions

  • pole pieces of eto electric machines By suitably shaping the pole pieces of eto electric machines it is posible to pro use such a. time course of the induced current as will enable the range of variation qf the point of ignition to be adjusted up to the limits of any desired but limited angle.
  • the resent invention has for its ob'ect to provide means of attaining a consi erably wider ra of variation of the point of ignition.
  • the trailing edge of the pole is provided on its side next to the poles of the magnet with a part composed of magnetically conducting material which is separated from the poles by a layer of non-magnetic material.
  • This arrangenlent has the effect that as the edge of the pole trails, that is to say, moves away from the yoke, the number of lines of force passin from the magnet into the yoke is not ret uced suddenly to Zero, but owing to the transmission of lines of force through the magnetically.
  • the said num r is first reduced to a medium value which is then gradually diminished to zero.
  • a respectively, composed of magnetically conducting material. These two parts are fixed to a carrier 1 inserted between the two poles and are separated from their respective poles by intermediate air gaps b, and t b.- respectively.
  • This invention is applicable both to apparatu's comprising stationary pole pieces and to apparatus comprising rotating armatures.
  • an induced member comprising a yoke and spaced pole pieces of magnetic material of an inducing member positioned between said pole pieces and relatively movable thereto and having magnetically polarized projections equal in number to the pole piecesand auxiliary pole tips of magnetic material located on the trailin edges of the rotor poles and magnetically insulated therefrom, whereb the reluctance of the flux path is gradua ly varied during the revolution of the rotor.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Description

Patented July 19. I5 3 the rotor for um'rso STATES ROTOR FOR IAGHETO-ELEOTBIC Specification of Letters Patent.
PATENT OFFICE;
: ABSIOR'OB '10 FIRE Patented July 19, 1921.
Application filed lovember 6, 1918. Serial Io. 261,480.
To all whomz't may concern! Be it known that I, Jacques Boiim acitizen of the Swiss Republic, residing at Obach, Solothurn, Switzerland, have invented certain new and useful Improvements in Rotors for Magneto-Electric Machines, of which the following is a specification.
By suitably shaping the pole pieces of eto electric machines it is posible to pro use such a. time course of the induced current as will enable the range of variation qf the point of ignition to be adjusted up to the limits of any desired but limited angle.
The resent invention has for its ob'ect to provide means of attaining a consi erably wider ra of variation of the point of ignition. ith this object the trailing edge of the pole is provided on its side next to the poles of the magnet with a part composed of magnetically conducting material which is separated from the poles by a layer of non-magnetic material. This arrangenlent has the effect that as the edge of the pole trails, that is to say, moves away from the yoke, the number of lines of force passin from the magnet into the yoke is not ret uced suddenly to Zero, but owing to the transmission of lines of force through the magnetically. ennducti part located next the pole, the said num r is first reduced to a medium value which is then gradually diminished to zero.
This resulting retardation of the variation in the number of lines of force causes also a retardation in the diminution of the induced current, whereby it is possible to get of each of its N'and S poles at par 0: am!
a, respectively, composed of magnetically conducting material. These two parts are fixed to a carrier 1 inserted between the two poles and are separated from their respective poles by intermediate air gaps b, and t b.- respectively.
This invention is applicable both to apparatu's comprising stationary pole pieces and to apparatus comprising rotating armatures.
In an ignition generator the combinationwith an induced member comprising a yoke and spaced pole pieces of magnetic material of an inducing member positioned between said pole pieces and relatively movable thereto and having magnetically polarized projections equal in number to the pole piecesand auxiliary pole tips of magnetic material located on the trailin edges of the rotor poles and magnetically insulated therefrom, whereb the reluctance of the flux path is gradua ly varied during the revolution of the rotor.
In testimony whereof I have signed my name to this specification.
JACQUES BOHLI.
US261430A 1918-11-06 1918-11-06 Rctor for magneto-electric machines Expired - Lifetime US1385038A (en)

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US261430A US1385038A (en) 1918-11-06 1918-11-06 Rctor for magneto-electric machines

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US1385038A true US1385038A (en) 1921-07-19

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4691132A (en) * 1985-05-24 1987-09-01 U.S. Philips Corporation Synchronous motor with two-pole permanent-magnet soft-magnetic-core rotor
US20160172908A1 (en) * 2014-12-11 2016-06-16 Johnson Electric S.A. Motor, stator core, pump and cleaning apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4691132A (en) * 1985-05-24 1987-09-01 U.S. Philips Corporation Synchronous motor with two-pole permanent-magnet soft-magnetic-core rotor
US20160172908A1 (en) * 2014-12-11 2016-06-16 Johnson Electric S.A. Motor, stator core, pump and cleaning apparatus

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