US416240A - Electric machine - Google Patents

Electric machine Download PDF

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US416240A
US416240A US416240DA US416240A US 416240 A US416240 A US 416240A US 416240D A US416240D A US 416240DA US 416240 A US416240 A US 416240A
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magnet
field
plates
armature
frame
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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
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • H02K1/185—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures to outer stators

Definitions

  • the invention relates to the construction of electric machines, and involves certain improvements in the machines themselves and in the method of building the same.
  • the object of the invention is to provide aneficient form of machine having a laminated field-magnet and armature-cores which will not develop excessive heat'when in operation, to simplify and cheapen the construction, and to generally adapt it to commercial use.
  • the machine is constructed in the following general manner, reference being had, especially in the description, to the construction of an alternating-current machineeither a generator or a motor.
  • Plates or sheets of magnetizable material are first stamped into the proper size and shape, dependent upon the exterior coniiguration of the machine. In the present instance the circular form is adopted.
  • a hole or opening is stamped through the center of the sheet, and this ultimately receives the armature-shaft.
  • Other openings are st-amped in the plates, leaving intermediate webs, which are to form the pole-pieces of the field-magnet.
  • the armature of the machine shall have magnetic lugs or teeth
  • the openings in each sheet are of such size as to extend into the portion of the sheet forming the armature-plate.
  • the armature-plates are built up or assembled upon an armatureshaft and bound together and turned or trimmed to the proper size. They may be previously stamped with openings for ventilation and oxidized or annealed.
  • the ring of the outer portion, having inwardly-proj ecting teeth, is cut in half, and these halves are laid up or assembled on a suitable mandrel and bound together. This portion may be oxidized or annealed before this is done. They are then placed in a suitable iieldmagnet frame and permanently secured in position.
  • the inner end ofthe resultant pole-pieces may be bored out for clearance of the armature.
  • the frame is made in seetions corresponding to the halves of the iieldmagnet plates, so that the upper portion may be first placed over the field-magnet plates secured thereto and afterward removed from the lower portion, together with the upper half of the plates, for the insertion of the armature.
  • the armature itself is provided with coils, which, in case teeth are applied to the armature, surround or are placed over the teeth and bound in position.
  • Figure l is an elevation, partly in section, of a complete machine; and Figs. 2, 3, 4, and 5 illustrate steps in the construction of the machine.
  • A represents the frame of the machine. It is constructed in two sections a o?, and the former supports or carries the pillars a3 ai, which carry the bearings for the armature-shaft. The other section a2 rests upon section a', but is removable therefrom.
  • the frame holds the iield-magnet core O, which is built up of plates of magnetizable material.
  • the armature-core is also builtup of laminze or plates of the same material. The armature-plates are themselves cut out from the sheets of which the iield-magnet plates are made. In other words, that which would otherwise be refuse in constructing the field-magnet plates is utilized in constructing the armature.
  • the method of forming the plates for both the field-magnet and armature is as follows: A sheet of magnetizable material of the requisite size and convenient shape-for instance, square-is first stamped or cut into circular or other desired shape, and by the same operation a hole c may be formed in the center. (See Figs. 3 and et.) By accomplishing these two results by one operation it is easily insured that the hole shall be in the center of the plate. After this operation, or, if desired, simultaneously therewith, the holes c c are stamped at equal distances through the plates. These are separated the proper distancesto leave teeth or webs d, which are to form the pole-pieces of the field-magnet.
  • the shape of the holes is such that the opposite sides of the webs are parallel, or approximately so.
  • the holes extend as near the IOS outer surface or edge of the plate as it is desired to have the metal of the field-magnet core cut away.
  • the central portion of the plate is then stamped out, as shown by the dotted line in Fig.
  • the portion thus cut out is utilized as an armature-plate. If it is desired that the armature shall have teeth or projections, then the openings c extend inward a distance sufficient to cut away the metal between such teeth, as represented at f in Fig.
  • the dotted line f then cuts through merely the web.
  • holes h are cut into the field-magnet plates. These are for convenience in binding the plates together in their proper relative positions.
  • the field-magnet plates are then cut in half, as indicated by the dotted lines 7L', one portion being designed to be used in the lower half of the field-magnet and the other in the upper half.
  • the field-magnet plates are laid upon a mandrel provided with rods, over which the openings 7L are placed, and the plates are built up one upon another until the entire number is assembled. They are firmly clamped together, and the entire mass is then placed in the lower half of the field-magnet frame.
  • the shaft of the mandrel isconcentric with the center of the field-magnet, and therefore rests in the bearings of the armatureshaft.
  • the upper section of the field magnet frame is then applied.
  • the plates of the field-magnet are fastened into the respective sections of the frame by anges a5 upon the frame and by bolts and by pouring molten metal or cement in the openings it, provided in the fieldmagnet frame.
  • the plates of the field-magnet may be cut away during the process of preparation at the points m. for the purpose of receiving this metal or cement.
  • openings 7c are stamped with openings 7c for the purpose of ventilation and removing useless metal.
  • these openings may be brought opposite each other or set so as to overlap, thus exposing an increased radiating-surface within the armature. After the armature is in position the upper portion of the field-magnet is again placed in position upon the lower half.
  • a field-magnet for electric machines consisting of two sets of laminze semicircular in form and a divided field-magnet frame, one portion receiving one set of the laminze and the other the other set of the laminze.
  • a frame of cast-iron having parallel flanges, both of which are integral with the body of the frame, and laminze composing the fieldmagnet poles bound in the frame by and between said flanges and secured o1' cemented by molten metal or cement, substantially as described.
  • a field magnet for electric machines composed of a frame having two flanges, both integral therewith and laminze bound between said flanges, substantially as described.
  • a plate for constructing laminas for electric machines stamped with radiating openings, leaving webs for pole-pieces of the iieldn1agnet, and also stamped with a central opening for receiving the armature-shaft.
  • a plate for constructing laminze for electric machines stamped with radiating openings, leaving webs for the pole-pieces of the field-magnet, and with a central opening for receiving the armature-shaft, and with openings for receiving bolts.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)

Description

(No Model.) 4 Sheets-Sheet 1. A. SCHMID. ELECTRIC MACHINE.
No. 416,240. Patented Deo. 3, 1889.
INVENTOR,
ALBHT SBHMm M 8f/w v(No Model.) 4 Sheets-Sheet 2.
A. SCHMID. I
ELECTRIC MACHINE.
No. 416,240. Patented Dec. 3, 1889.
WITNESSES: INVENTOR,
my ALBEHTEBHMxn. @520% QM Att y.
N PEYERS. Phamuhngmpnnr. wnhingxm D. C.
4 Sheets-Sheet 3.
(No Model.)
A. SCHMID. ELECTRIC MACHINE.
No. 416,240. Patented Dec. 3, 1889 WITNESSES:
ALBERT Enz-1Min- 2M zA/5v.
MdL-i4 Att'y.
(No Model.) 4 Sheets-Sheet 4.
A. SCHMID. ELECTRIC MACHINE.
No. 416,240. Patnted Dec. 3, 1889.
WITNESSES:
' INVENTOR, L n ALBERT Enz-1mm- Att' y.
UNITED STATES PATENT OEEICE.y
ALBERT SCHMID, OF ALLEGHENY, ASSIGNOR TO THE WESTINGHO'USE ELEC- TRIO COMPANY, OF PITTSBURG, PENNSYLVANIA.
ELECTRIC MACHINE.
SPECIFICATION forming part of Letters Patent No. 416,240, dated December 3, 1889. i Application filed April 2, 1889. Serial No. 305,652. (No model.)
To all whom t may concern.-
Be it known that I, ALBERT SCHMID, a citizen of the Republic of Switzerland, residing in Allegheny, county of Allegheny, and State of Pennsylvania, have invented a certain new and useful Improvement in the Construction of Electric Machines, of which the following is a specification.
The invention relates to the construction of electric machines, and involves certain improvements in the machines themselves and in the method of building the same.
The object of the invention is to provide aneficient form of machine having a laminated field-magnet and armature-cores which will not develop excessive heat'when in operation, to simplify and cheapen the construction, and to generally adapt it to commercial use.
In carrying the invention into practice the machine is constructed in the following general manner, reference being had, especially in the description, to the construction of an alternating-current machineeither a generator or a motor. Plates or sheets of magnetizable material are first stamped into the proper size and shape, dependent upon the exterior coniiguration of the machine. In the present instance the circular form is adopted. A hole or opening is stamped through the center of the sheet, and this ultimately receives the armature-shaft. Other openings are st-amped in the plates, leaving intermediate webs, which are to form the pole-pieces of the field-magnet. In case it is desired that the armature of the machine shall have magnetic lugs or teeth the openings in each sheet are of such size as to extend into the portion of the sheet forming the armature-plate. The armature-plates are built up or assembled upon an armatureshaft and bound together and turned or trimmed to the proper size. They may be previously stamped with openings for ventilation and oxidized or annealed. The ring of the outer portion, having inwardly-proj ecting teeth, is cut in half, and these halves are laid up or assembled on a suitable mandrel and bound together. This portion may be oxidized or annealed before this is done. They are then placed in a suitable iieldmagnet frame and permanently secured in position.
The inner end ofthe resultant pole-pieces may be bored out for clearance of the armature. The frame is made in seetions corresponding to the halves of the iieldmagnet plates, so that the upper portion may be first placed over the field-magnet plates secured thereto and afterward removed from the lower portion, together with the upper half of the plates, for the insertion of the armature. The armature itself is provided with coils, which, in case teeth are applied to the armature, surround or are placed over the teeth and bound in position.
The details will be 4more fully described in connection with the accompanying drawings.
In the drawings, Figure l is an elevation, partly in section, of a complete machine; and Figs. 2, 3, 4, and 5 illustrate steps in the construction of the machine.
Referring to the iigures, A represents the frame of the machine. It is constructed in two sections a o?, and the former supports or carries the pillars a3 ai, which carry the bearings for the armature-shaft. The other section a2 rests upon section a', but is removable therefrom. The frame holds the iield-magnet core O, which is built up of plates of magnetizable material. The armature-core is also builtup of laminze or plates of the same material. The armature-plates are themselves cut out from the sheets of which the iield-magnet plates are made. In other words, that which would otherwise be refuse in constructing the field-magnet plates is utilized in constructing the armature.
The method of forming the plates for both the field-magnet and armature is as follows: A sheet of magnetizable material of the requisite size and convenient shape-for instance, square-is first stamped or cut into circular or other desired shape, and by the same operation a hole c may be formed in the center. (See Figs. 3 and et.) By accomplishing these two results by one operation it is easily insured that the hole shall be in the center of the plate. After this operation, or, if desired, simultaneously therewith, the holes c c are stamped at equal distances through the plates. These are separated the proper distancesto leave teeth or webs d, which are to form the pole-pieces of the field-magnet. The shape of the holes is such that the opposite sides of the webs are parallel, or approximately so. The holes extend as near the IOS outer surface or edge of the plate as it is desired to have the metal of the field-magnet core cut away. The central portion of the plate is then stamped out, as shown by the dotted line in Fig. The portion thus cut out is utilized as an armature-plate. If it is desired that the armature shall have teeth or projections, then the openings c extend inward a distance sufficient to cut away the metal between such teeth, as represented at f in Fig. The dotted line f then cuts through merely the web. During one of the stamping operations holes h are cut into the field-magnet plates. These are for convenience in binding the plates together in their proper relative positions. The field-magnet plates are then cut in half, as indicated by the dotted lines 7L', one portion being designed to be used in the lower half of the field-magnet and the other in the upper half.
The field-magnet plates are laid upon a mandrel provided with rods, over which the openings 7L are placed, and the plates are built up one upon another until the entire number is assembled. They are firmly clamped together, and the entire mass is then placed in the lower half of the field-magnet frame. The shaft of the mandrel isconcentric with the center of the field-magnet, and therefore rests in the bearings of the armatureshaft. The upper section of the field magnet frame is then applied. The plates of the field-magnet are fastened into the respective sections of the frame by anges a5 upon the frame and by bolts and by pouring molten metal or cement in the openings it, provided in the fieldmagnet frame. The plates of the field-magnet may be cut away during the process of preparation at the points m. for the purpose of receiving this metal or cement. By thus fastening the frame and core together the latter is effectually prevented from shifting. y
In assembling the sections of the field-magnet plates they are brought into their former relative positions-that is to say, making complete rings. After they have been placed in the ring and fastened in position the mandrel may be withdrawn. rlhe clamp being released, the plates are prevented from forcing themselves apart by the overhanging anges d5 of the field-magnet frame. Bolts p may be inserted through the openings 7L to hold the pole-pieces firm. It is usually desired to place thicker plates H at the respective sides of the field-magnet core. The bolts p may bind these in position. The entire interior may then be bored out to render the inner ends of the pole-pieces true and even. The upper section of the frame,with its laminated field-poles,is then removed from the lower section. The field-magnet bobbinst are then slipped over the pole-pieces and fastened by bolts, pins, or screws.
The armature-plates,,either before or after being separated from the field-magn et plates,
are stamped with openings 7c for the purpose of ventilation and removing useless metal. In assembling the plates these openings may be brought opposite each other or set so as to overlap, thus exposing an increased radiating-surface within the armature. After the armature is in position the upper portion of the field-magnet is again placed in position upon the lower half.
I claim as my inventionl. A field-magnet for electric machines, consisting of two sets of laminze semicircular in form and a divided field-magnet frame, one portion receiving one set of the laminze and the other the other set of the laminze.
2. The combination of the lower and upper halves of the field-magnet frame and the laminze forming the field-n1agnet, divided in halves and bound in their respective sections of the frame.
3. The combination of a field-magnet frame and laminze for composing the field-magnet bound within such frame, said frame having openings into which molten metal or cement maybe poured for binding the parts ltogether.
4. In a field-magnet for electric machines, a frame of cast-iron having parallel flanges, both of which are integral with the body of the frame, and laminze composing the fieldmagnet poles bound in the frame by and between said flanges and secured o1' cemented by molten metal or cement, substantially as described.
5. A field magnet for electric machines, composed of a frame having two flanges, both integral therewith and laminze bound between said flanges, substantially as described.
6. A plate for constructing laminas for electric machines, stamped with radiating openings, leaving webs for pole-pieces of the iieldn1agnet, and also stamped with a central opening for receiving the armature-shaft.
7. A plate for constructing laminze for electric machines, stamped with radiating openings, leaving webs for the pole-pieces of the field-magnet, and with a central opening for receiving the armature-shaft, and with openings for receiving bolts.
8. The hereinbefore-described method of building electric machines, which consists in stamping the laminae for composing the fieldmagnet from plates of soft iron, dividing the field-magnet plates so stamped, assembling' and binding the respective sets of sections in position, temporarily removing the one set from the other and placing the armature in position, and subsequently replacing the removed set of sections.
In testimony whereof I have hereunto subscribed my name this 30th day of March, A. D. i889.
ALBERT SCIIMID.
Witnesses:
W. D. UPTEGRAFF, CHARLES A. TERRY.
IOO
rio
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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2613242A (en) * 1949-02-10 1952-10-07 Singer Mfg Co Electric motor with split pole pieces
US3824682A (en) * 1973-07-26 1974-07-23 Briggs & Stratton Corp Method of mass producing alternator stators for small engines
USRE28960E (en) * 1973-07-26 1976-09-14 Briggs & Stratton Corporation Method of mass producing alternator stators for small engines
US4812695A (en) * 1986-08-15 1989-03-14 Marathon Electric Manufacturing Corporation Annular stator core construction
WO2016189246A1 (en) * 2015-05-27 2016-12-01 Valeo Equipements Electriques Moteur Rotating electrical machine equipped with a device for retaining a system for guiding the rotation of a shaft
WO2016189244A1 (en) * 2015-05-27 2016-12-01 Valeo Equipements Electriques Moteur Rotating electrical machine comprising a cradle
FR3036880A1 (en) * 2015-05-27 2016-12-02 Valeo Equip Electr Moteur ROTATING ELECTRIC MACHINE WITH A CELL IN THERMAL CONTACT WITH A STATOR
FR3036881A1 (en) * 2015-05-27 2016-12-02 Valeo Equip Electr Moteur ROTATING ELECTRIC MACHINE HAVING A STATOR COOLED BY A HOLDING BODY
FR3036885A1 (en) * 2015-05-27 2016-12-02 Valeo Equip Electr Moteur ROTATING ELECTRIC MACHINE WITH COAXIAL CRADLE AND STATOR
FR3036884A1 (en) * 2015-05-27 2016-12-02 Valeo Equip Electr Moteur ROTATING ELECTRIC MACHINE HAVING A CRIB
FR3036886A1 (en) * 2015-05-27 2016-12-02 Valeo Equip Electr Moteur ROTATING ELECTRIC MACHINE HAVING A DEVICE FOR MAINTAINING A ROTATION GUIDE SYSTEM OF A TREE

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2613242A (en) * 1949-02-10 1952-10-07 Singer Mfg Co Electric motor with split pole pieces
US3824682A (en) * 1973-07-26 1974-07-23 Briggs & Stratton Corp Method of mass producing alternator stators for small engines
USRE28960E (en) * 1973-07-26 1976-09-14 Briggs & Stratton Corporation Method of mass producing alternator stators for small engines
US4812695A (en) * 1986-08-15 1989-03-14 Marathon Electric Manufacturing Corporation Annular stator core construction
WO2016189246A1 (en) * 2015-05-27 2016-12-01 Valeo Equipements Electriques Moteur Rotating electrical machine equipped with a device for retaining a system for guiding the rotation of a shaft
WO2016189244A1 (en) * 2015-05-27 2016-12-01 Valeo Equipements Electriques Moteur Rotating electrical machine comprising a cradle
FR3036880A1 (en) * 2015-05-27 2016-12-02 Valeo Equip Electr Moteur ROTATING ELECTRIC MACHINE WITH A CELL IN THERMAL CONTACT WITH A STATOR
FR3036881A1 (en) * 2015-05-27 2016-12-02 Valeo Equip Electr Moteur ROTATING ELECTRIC MACHINE HAVING A STATOR COOLED BY A HOLDING BODY
FR3036885A1 (en) * 2015-05-27 2016-12-02 Valeo Equip Electr Moteur ROTATING ELECTRIC MACHINE WITH COAXIAL CRADLE AND STATOR
FR3036884A1 (en) * 2015-05-27 2016-12-02 Valeo Equip Electr Moteur ROTATING ELECTRIC MACHINE HAVING A CRIB
FR3036886A1 (en) * 2015-05-27 2016-12-02 Valeo Equip Electr Moteur ROTATING ELECTRIC MACHINE HAVING A DEVICE FOR MAINTAINING A ROTATION GUIDE SYSTEM OF A TREE

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