EP0250564A1 - Rotor a pole saillant - Google Patents

Rotor a pole saillant

Info

Publication number
EP0250564A1
EP0250564A1 EP87900581A EP87900581A EP0250564A1 EP 0250564 A1 EP0250564 A1 EP 0250564A1 EP 87900581 A EP87900581 A EP 87900581A EP 87900581 A EP87900581 A EP 87900581A EP 0250564 A1 EP0250564 A1 EP 0250564A1
Authority
EP
European Patent Office
Prior art keywords
rotor
salient pole
core
pole rotor
end plate
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.)
Withdrawn
Application number
EP87900581A
Other languages
German (de)
English (en)
Other versions
EP0250564A4 (fr
Inventor
Philip C. Mosher
Alex Krinickas
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.)
Sundstrand Corp
Original Assignee
Sundstrand Corp
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 Sundstrand Corp filed Critical Sundstrand Corp
Publication of EP0250564A1 publication Critical patent/EP0250564A1/fr
Publication of EP0250564A4 publication Critical patent/EP0250564A4/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K3/00—Details of windings
    • H02K3/46—Fastening of windings on the stator or rotor structure
    • H02K3/52—Fastening salient pole windings or connections thereto

Definitions

  • This invention generally relates to electrical apparatus and particularly to a salient pole rotor for use with a generator or other electrical machine.
  • a stator having an A.C. winding is arranged to provide a pulsating or rotating multi-pole magnetic field
  • a rotor is provided with an electrical winding in which magnetic material is ar ⁇ ranged so that when in one position relative to the mag ⁇ netic field provided by the stator winding, termed the direct axis position, a low reluctance path is provided for magnetic flux from the stator, while when the rotor is 90° electrical relative to this position, termed the quadrature axis position, a path of high reluctance to magnetic flux from the stator is provided.
  • two salient poles are provided but, in general, the rotor is provided with salient pole sec ⁇ tions equal in number to the number of poles of the stat ⁇ or magnetic field.
  • a rotor core and winding assem- bly is positioned between a pair of end shafts and/or end plates which connect the rotor in driving relationship with other components of the electrical apparatus.
  • the rotor core is connected to the end shafts and/or end plates by some structural means for transmitting torque thereto.
  • the structural means comprises a torque tube or shaft extending generally axially through the rotor core.
  • the torque tube or shaft for supporting the rotor structure extends between the end plates or may comprise an ' extension of the end shaft means itself.
  • This type of structural support is adequate in relatively low power electrical apparatus. However, it creates a critical magnetic flux path problem by impeding the flux path through the axis of the rotor.
  • Some electrical apparatus such as generators employ a "can" for retaining cooling oil about the rotor components and retaining lamination of the rotor core.
  • Attempts have been made to employ the can itself as the structural component or framework for the rotor extending between the end plates thereof.
  • the can must be relatively thick and thereby creates an ineffi- ⁇ ient air gap between the rotor core and the armature core.
  • This invention is directed to providing a new and improved rotor construction which employs novel structural support means between the end shafts of the rotor and which obviates the problems described above.
  • An object, therefore, of the invention is to provide a rotor structure having unique support means providing an unimpeded magnetic flux path through the axis of the rotor.
  • a two salient pole rotor for use with a gener- ator or other electrical apparatus.
  • a solid core extends lengthwise of the rotor and through the axis of rotation thereof to provide an unimpeded magnetic flux path through the axis of the rotor.
  • the core has a pair of diametrically disposed, axially extending grooves along the peripheral length thereof.
  • a pair of end shaft means including end plate means have complementary groove means in line with the grooves in the core.
  • a pair of struc ⁇ tural support wedge members extend lengthwise of the rotor, radially spaced from the axis thereof, and dis- posed in the grooves in the core and the groove means in the end plate means.
  • the core is of laminated construction to pro ⁇ vide a highly saturated magnetic field.
  • the wedge mem ⁇ bers are secured in the groove means of the end plate means by welding.
  • the rotor includes end support means secured to opposite ends of the laminations between the core and the end plate means to control squareness of the core to the outside diameter of the rotor.
  • the end support means include groove means for accommodating the wedge members.
  • the end plate means and the end support means are gener ⁇ ally disc-shaped and of substantially equal diameters to provide cylindrical bounds for the rotor.
  • the depth of the groove means in the plate means and in the end sup- port means, and the thickness and outer surface configur ⁇ ation of the wedge members are such that the outside surface of the wedge members form a continuation of the circular periphery of the end plate means.
  • a cylindrical "can" is positioned about the rotor extending between the end plate means. The can is relatively thin and minimizes the ' air gap between the rotor core and the stator armature because the can does not comprise a structural or torque transmitting compo ⁇ nent of the rotor.
  • FIGURE 1 is a perspective view of the rotor core and end supports for the rotor of this invention
  • FIGURE 2 is a perspective view of the rotor in assembled condition, except for an exploded illustration of the supporting wedge members of the rotor;
  • FIGURE 3 is a view similar to that of Figure 2, with the wedge members secured in assembly;
  • FIGURE 4 is a perspective view similar to that of Figure 3, with a can in assembled condition surround ⁇ ing the major rotor components;
  • FIGURES 5-7 are views similar to that of Fig- ures 1-3 of an alternate form of the invention. Detailed Description Of The Preferred Embodiment
  • the rotor of this invention is illustrated in the form of a two salient pole rotor for use with a generator or other electrical apparatus.
  • the completed rotor assem ⁇ bly, generally designated 10 is illustrated in final assembled condition in Figure 4.
  • the rotor includes a solid core, generally designated 12, which has a central core body portion 14 and two integral pole sections 16 diametrically opposed to each other to form the North and South poles of the salient pole rotor core.
  • core 12 including central body portion 14 and pole sections 16,18 are fabricated of laminations bonded together, and the term "solid" core is used herein and the claims here- of as contemplating a core having an unimpeded magnetic flux path through the axis of the rotor.
  • End support members 20 are provided at opposite ends of core 12 whereby the axially outer faces thereof can be machined to control the squareness of the core to the outside diameter of the rotor.
  • Bores 22 are provided through end support members 20 and the pole sections 16,18 of laminated core 12 for receiving threaded rods to hold the components in assembly, as described hereinaf ⁇ ter. It can be seen in Figure 1 that laminated core
  • End support members 20 actually comprise sections of disc-shaped members defining groove means 26 in line with grooves 24 of core 12. Rotor windings 28 are wound about central core section 14 within grooves 24 of the core and groove means 26 defined by end support sections 20.
  • end shaft means are provided at opposite ends of rotor 12 and end support sections 20.
  • End shaft means 30 may include a shaft and spline section 31 at one end of the rotor as well as a bearing that is not shown but the location of which is indicated generally at 30a and an end shaft 34 which will have fitted thereon a bearing (not shown) at the other end of the rotor.
  • Each end shaft means 30 includes an end plate 32.
  • shaft means is used in contemplation of rotor assemblies wherein the actual end shaft sections or end bearings may be separate from the end plates themselves.
  • Other power transmitting components are known to be coupled to end plate means, such as end plates 32 in a rotor assembly.
  • Each end plate 32 is provided with groove means 36 in line with grooves 24 of core 12 and groove means 26 between core end support sections 20. These grooves and groove means receive and position a pair of structural support wedge members 38 which extend lengthwise of the rotor, radially spaced from the axis thereof. Each wedge member 38 has bores 40 for receiving threaded bolts 42 which extend through apertures 44 in central core section 14 and which are threaded into the opposite wedge member to hold the wedge members in position within the groove means 24,26,36.
  • Figure 2 also shows axial holes 46 in end plates 32 in line with bores 22 (Fig. 1) in core end support sections 20 for receiving rods 48 which are threaded into the opposite end plate to hold the compo ⁇ nents in axial assembly.
  • Each wedge member 38 has a pair of elongated recesses 49 on the inside thereof for accom ⁇ modating windings 28.
  • Figure 3 shows wedge members 38 positioned within grooves 24 in core 12, groove means 26 in end support sections 20 and groove means 36 in end plates 32 of the end shaft means 30. It can be seen in Figures 2 and 3 that the outer surface of each wedge member 38 is generally cylindrical. End plates 32 and end support sections 20 are generally disc-shaped. The outer sur ⁇ faces of the wedge members are circular to complement the shape of the end plates and the end support sections, as shown. When assembled, as shown, wedge members 38 are permanently secured within the rotor assembly by welding, as indicated generally at 50, to end plates 32.
  • Figure 4 shows the complete salient pole rotor 10 in final construction and includes a "can" 52 about the rotor and extending between end plates 32.
  • the can is secured in sealed condition to the outer periphery of end plates 32, and by a press fit, to the outer periphery of rotor core 12 and end supports 20.
  • the can is provid ⁇ ed only for retaining cooling oil within the rotor for the core components and for retaining the lamination of the rotor core.
  • the can is thin and does not provide a torque carrying function which is provided by wedge mem ⁇ bers 38. Access means for the supply and/ withdrawal of oil is provided, as conventional, but not shown.
  • Figures 5-7 show an alternate form of the in- vention wherein wedge members 38A extend all the way through end plates 32 to the outer faces thereof. Groove means 36A, likewise, extend axially through the width of the end plates for receiving the longer wedge members. Otherwise, like numerals have been applied to like compo ⁇ nents described in relation to the embodiment of Figures 1-3.
  • a sali- ent pole rotor has been provided with a novel support structure which provides an unimpeded magnetic flux path through the axis of the rotor.
  • the support structure including wedge members 38, are confined within the outer peripheral bounds of the core end support sections and shaft end support means.
  • the structure affords the use of a relatively thin oil cover 52 which simply needs to be secured in sealed position and, not being a structural component of the rotor assembly, the thinness of the oil cover minimizes the air gap between the rotor core 12 and the stator armature.

Abstract

Un rotor à pôle saillant (10) utilisé avec un générateur ou autre appareil électrique comprend un noyau plein (12) s'étendant dans le sens de la longueur du rotor et dans l'axe de rotation de celui-ci. Le noyau forme un chemin de flux magnétique libre dans l'axe du rotor. Une paire d'arbres extrêmes (30) est pourvue de plaques extrêmes (32) aux extrémités opposées du noyau. Une paire de coins (38) en matériau non magnétique est disposée axialement dans des rainures (24) sur les côtés opposés du noyau du rotor. Les coins s'étendent axialement au delà de chaque extrémité du noyau et sont fixés dans des rainures complémentaires (36) sur les côtés opposés des plaques extrêmes.
EP19870900581 1985-12-23 1986-12-19 Rotor a pole saillant. Withdrawn EP0250564A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US81219385A 1985-12-23 1985-12-23
US812193 1985-12-23

Publications (2)

Publication Number Publication Date
EP0250564A1 true EP0250564A1 (fr) 1988-01-07
EP0250564A4 EP0250564A4 (fr) 1988-04-26

Family

ID=25208817

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19870900581 Withdrawn EP0250564A4 (fr) 1985-12-23 1986-12-19 Rotor a pole saillant.

Country Status (4)

Country Link
EP (1) EP0250564A4 (fr)
JP (1) JPS63502157A (fr)
IL (1) IL80995A0 (fr)
WO (1) WO1987004021A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5990584A (en) * 1998-08-25 1999-11-23 Eaton Corporation Direct current torque motor with extended stator poles
JP2014220963A (ja) * 2013-05-10 2014-11-20 株式会社日立製作所 回転電機
FR3087588B1 (fr) * 2018-10-19 2023-03-03 Psa Automobiles Sa Machine electrique a rotor bobine

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE191665C (fr) *
DE578732C (de) * 1930-06-07 1933-06-16 Siemens Schuckertwerke Akt Ges Laeufer fuer elektrische Maschinen mit angeflanschten Wellenstuempfen
DE1077774B (de) * 1958-03-17 1960-03-17 Iaelinia Ag Fuer Elek Sche Ind Polrad fuer zweipolige Synchrongeneratoren
FR1489182A (fr) * 1966-06-08 1967-07-21 Brissonneau & Lotz Rotor perfectionné pour machines électriques
GB2117188A (en) * 1982-03-24 1983-10-05 Okuma Machinery Works Ltd A permanent magnet rotor for synchronous motors
EP0104830A1 (fr) * 1982-09-27 1984-04-04 Fanuc Ltd. Construction d'un rotor du type à aimant permanent pour une machine électrique
WO1985000937A1 (fr) * 1983-08-17 1985-02-28 Sundstrand Corporation Rotor magnetique et son procede de montage

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1593230A (en) * 1921-05-17 1926-07-20 Varley Duplex Magnet Co Armature for magnetos and the like
US2632123A (en) * 1944-07-06 1953-03-17 Kober William Alternating current machine
US4007494A (en) * 1975-04-11 1977-02-15 Glasrock Products, Inc. Bone cap
EP0107476A3 (fr) * 1982-10-25 1985-01-02 Calcitek, Inc. Matière de remplacement d'une greffe d'os
JPS59200642A (ja) * 1983-04-28 1984-11-14 三菱鉱業セメント株式会社 骨固定用くぎ

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE191665C (fr) *
DE578732C (de) * 1930-06-07 1933-06-16 Siemens Schuckertwerke Akt Ges Laeufer fuer elektrische Maschinen mit angeflanschten Wellenstuempfen
DE1077774B (de) * 1958-03-17 1960-03-17 Iaelinia Ag Fuer Elek Sche Ind Polrad fuer zweipolige Synchrongeneratoren
FR1489182A (fr) * 1966-06-08 1967-07-21 Brissonneau & Lotz Rotor perfectionné pour machines électriques
GB2117188A (en) * 1982-03-24 1983-10-05 Okuma Machinery Works Ltd A permanent magnet rotor for synchronous motors
EP0104830A1 (fr) * 1982-09-27 1984-04-04 Fanuc Ltd. Construction d'un rotor du type à aimant permanent pour une machine électrique
WO1985000937A1 (fr) * 1983-08-17 1985-02-28 Sundstrand Corporation Rotor magnetique et son procede de montage

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO8704021A1 *

Also Published As

Publication number Publication date
IL80995A0 (en) 1987-03-31
WO1987004021A1 (fr) 1987-07-02
EP0250564A4 (fr) 1988-04-26
JPS63502157A (ja) 1988-08-18

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19870914

AK Designated contracting states

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Designated state(s): DE FR GB IT

A4 Supplementary search report drawn up and despatched

Effective date: 19880426

17Q First examination report despatched

Effective date: 19900529

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19901009

RIN1 Information on inventor provided before grant (corrected)

Inventor name: KRINICKAS, ALEX

Inventor name: MOSHER, PHILIP, C.