CH175786A - Alternator. - Google Patents

Alternator.

Info

Publication number
CH175786A
CH175786A CH175786DA CH175786A CH 175786 A CH175786 A CH 175786A CH 175786D A CH175786D A CH 175786DA CH 175786 A CH175786 A CH 175786A
Authority
CH
Switzerland
Prior art keywords
pole
length
pole pieces
sinusoidal
generator according
Prior art date
Application number
Other languages
German (de)
Inventor
Oerlikon Maschinenfabrik
Original Assignee
Oerlikon Maschf
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 Oerlikon Maschf filed Critical Oerlikon Maschf
Publication of CH175786A publication Critical patent/CH175786A/en

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • H02K1/24Rotor cores with salient poles ; Variable reluctance rotors
    • H02K1/243Rotor cores with salient poles ; Variable reluctance rotors of the claw-pole type

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Synchronous Machinery (AREA)

Description

  

  Wechselstromerzeuger.    Bei Wechselstromerzeugern wird oft ver  langt, dass die Klemmenspannung genaue  Sinusform aufweist. Dies wird erfindungs  gemäss dadurch erreicht, dass die Polschuhe,  von denen ein jeder zwei ungleich lange  Bogenkanten besitzt, und dabei die gleich  geformten Polschuhe der Nachbarpole um  180   gegeneinander verdreht erscheinen,  wenigstens annähernd eine sinusförmige  Umgrenzungslinie besitzen.  



  Die beiliegende schematische Zeichnung  zeigt den     Erfindungsgegenstand    in zwei  Ausführungsbeispielen. Die Fig. 1 zeigt in  Draufsicht Polschuhe 1 mit ungleich langen  Polbögen 2 und 3. Die Umgrenzungslinie des  Polschuhes ist sinusförmig, oder wenigstens  annähernd sinusförmig. Die nebeneinander  liegenden Polschuhe sind um<B>180'</B> gegen  einander verdreht. Die Spannungskurve, die  in einem Leiter einer Nut durch eine solche  Polschuhform erzeugt wird, besitzt genau  dieselbe Form (Fig. 2) wie der Polschuh.  Die Polkerne     können    symmetrisch zur     Ebene       durch alle Polaxen ausgebildet sein oder  ebenfalls wenigstens annähernd Sinusform  besitzen.

           Eine    Ausführungsform mit     Klauen-          ma.gnetpolen    ist in den Fig. 8 bis 5 dar  gestellt, und zwar in Seiten-, in Vorder- und  in Draufsicht. 5 und 6 sind die abwechselnd  von rechts nach links und von links nach  rechts (Fig. 8) übergreifenden Klauen, wel  che die Polschuhe bilden und     annähernd     sinusförmig ausgebildet sind. 7 ist die Er  regerwicklung. Diese Ausführungsform eig  net sich besonders für hochtourige Genera  toren, da die gezeigte Polschuhform bei auf  tretenden Fliehkräften sehr niedrige Bean  spruchungen ergibt.  



  Um in der Sinusform der Feldkurve  keine     Diskontinuität    zu erhalten, die Anlass  zu Oberschwingungen in der Spannungs  kurve     geben    könnte, wird vorteilhaft die  Länge der     Basiskante    2     (Fig.    1) gleich der  Polteilung     bemesse..  



  Alternator. In the case of alternators, it is often required that the terminal voltage has an exact sinusoidal shape. This is achieved according to the invention in that the pole pieces, each of which has two curved edges of unequal length, and the identically shaped pole pieces of the neighboring poles appear rotated by 180 relative to one another, have at least approximately a sinusoidal boundary line.



  The accompanying schematic drawing shows the subject matter of the invention in two exemplary embodiments. 1 shows a plan view of pole shoes 1 with pole arcs 2 and 3 of unequal length. The boundary line of the pole shoe is sinusoidal, or at least approximately sinusoidal. The pole pieces lying next to each other are twisted by <B> 180 '</B> against each other. The voltage curve that is generated in a conductor of a slot by such a pole piece shape has exactly the same shape (FIG. 2) as the pole piece. The pole cores can be designed symmetrically to the plane through all polaxes or also have an at least approximately sinusoidal shape.

           An embodiment with Klauen- ma.gnetpolen is shown in FIGS. 8 to 5, namely in side, in front and in plan view. 5 and 6 are the alternately from right to left and from left to right (Fig. 8) overlapping claws, wel che form the pole pieces and are approximately sinusoidal. 7 is the excitation winding. This embodiment is particularly suitable for high-speed generators, since the pole shoe shape shown results in very low stresses when centrifugal forces occur.



  In order not to have any discontinuity in the sinusoidal shape of the field curve which could give rise to harmonics in the voltage curve, the length of the base edge 2 (Fig. 1) is advantageously dimensioned to be equal to the pole pitch.

 

Claims (1)

PATENTANSPRUCH: Wechselstromerzeuger, bei welchem je der Polschuh zwei ungleich lange Bogen kanten besitzt -und die gleichgeformten Pol schuhe der Nachbarpole um<B>180'</B> gegenein ander verdreht erscheinen, dadurch gekenn zeichnet, dass der Polschuh eine wenigstens annähernd sinusförmige Umgrenzungslinie besitzt. <B>UNTERANSPRÜCHE:</B> 1. Wechselstromerzeuger nach Patentan spruch, dadurch gekennzeichnet, dass die Länge der Basiskante der Polschuhe der Polteilung entspricht. 2. Wechselstromerzeuger nach Patentan spruch, dadurch gekennzeichnet, dass der Polkern symmetrisch zur Ebene durch alle Polaxen ausgebildet ist. PATENT CLAIM: AC generator in which the pole piece has two curved edges of unequal length - and the identically shaped pole pieces of the neighboring poles appear twisted by <B> 180 '</B>, characterized in that the pole piece has an at least approximately sinusoidal boundary line owns. <B> SUBClaims: </B> 1. AC generator according to patent claim, characterized in that the length of the base edge of the pole pieces corresponds to the pole pitch. 2. AC generator according to patent claim, characterized in that the pole core is symmetrical to the plane through all Polaxen.
CH175786D 1934-07-19 1934-07-19 Alternator. CH175786A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH175786T 1934-07-19

Publications (1)

Publication Number Publication Date
CH175786A true CH175786A (en) 1935-03-15

Family

ID=4426487

Family Applications (1)

Application Number Title Priority Date Filing Date
CH175786D CH175786A (en) 1934-07-19 1934-07-19 Alternator.

Country Status (1)

Country Link
CH (1) CH175786A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015090376A1 (en) * 2013-12-18 2015-06-25 Abb Technology Ag Wind power generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015090376A1 (en) * 2013-12-18 2015-06-25 Abb Technology Ag Wind power generator

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