US1375461A - Induction-motor - Google Patents
Induction-motor Download PDFInfo
- Publication number
- US1375461A US1375461A US296649A US29664919A US1375461A US 1375461 A US1375461 A US 1375461A US 296649 A US296649 A US 296649A US 29664919 A US29664919 A US 29664919A US 1375461 A US1375461 A US 1375461A
- Authority
- US
- United States
- Prior art keywords
- bars
- core
- motor
- induction
- squirrel cage
- 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 - Lifetime
Links
- 241000555745 Sciuridae Species 0.000 description 9
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000005351 kimble Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- PCLIRWBVOVZTOK-UHFFFAOYSA-M 2-(1-methylpyrrolidin-1-ium-1-yl)ethyl 2-hydroxy-2,2-diphenylacetate;iodide Chemical compound [I-].C=1C=CC=CC=1C(O)(C=1C=CC=CC=1)C(=O)OCC[N+]1(C)CCCC1 PCLIRWBVOVZTOK-UHFFFAOYSA-M 0.000 description 1
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
- H02K17/165—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors characterised by the squirrel-cage or other short-circuited windings
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
- H02K17/168—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors having single-cage rotors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49002—Electrical device making
- Y10T29/49009—Dynamoelectric machine
- Y10T29/49012—Rotor
Definitions
- This invention relates to squirrel cage structures for dynamo-electric machines, and to methods of forming same.
- the main objects of the invention are to provide an improved form of conductor adapted to serve as a squirrel cage bar and capable of readily transmitting large currents of low frequency or of non-alternating character, but offering relatively high impedance to alternating currents of high frequency; and to provide-a squirrel cage rotor having improved ventilating means.
- Figure 1 is a longitudinal section on the line 11 of Fi 2, of a squirrel cage rotor, one side bein iiroken away.'
- Fig. 2 is su stantially an end view of the rotor with the shaft and the projecting ends of the squirrel ca e bars shown in section on the line 22 of %i 1.
- the rotor comprises a laminated core 1 secured by threaded clamping rings 2 on the shaft 3.
- the squirrel cage carried by said core includes'a pair of end rings 1 and a peripheral series of bars 5 connecting'said rings.
- Each bar 5 consists of a core 6. of high reactance metal and a coating or sheath of low impedance metal, cast-iron rods being well adapted to serve as cores, and an electro-deposlt of copper being best adapted 'to serve as the covering 7.
- the said bars are disposed in slots 8 and are secured to the end rings in a substantially integral manner by any approved means, preferably brazing, as shown at 9.
- the method of, forming and assembling the several parts is as follows:
- the bars for the squirrel cage are cut in suitable lengths from copper-plated stock, which may be supplied in any lengths which commercial convenience ma determine.
- the cores are assembled in t e usual manner as understood-in the art, andthe end rings 4 are applied thereto, after wh'ch thebars 5 are set into place and arrang d to project an equal distance at each end for ventilating purposes and are secured as above explained.
- the compound bars 5 are not necessarily limited to the cylindrical sheath and core form shown, still the concentric distribution of the copper about the iron is considered best, as it is most favorable to the transmission of hi h frequency current. This form is also a vantageous' asbeing adapted for ready manufacture. v
- core openings for the bars 5. are designated as slots, it is to be understood that they may be of any approved form, including tubular perforations disposed adjacent to the core surface.
- the bars offer a relatively high egree of impedance, due to the high frequency of the current which tends to flow therein,'but as the machine comes up to speed, the frequency diminishes until, at or near synchronism, the current becomes substantially constant and unidirectional, so that the reactance becomes negligible and only the low ohmic resistance of the circuit has to be overcome.
- a squirrel ca e winding comprising a air of low impe ance end rings, in comination with a peripheral series of compound bars connecting said rings, each bar including a core of high-reactance metal and a covering of low impedance metal.
- a squirrel cage motor .device of the character described comprising a laminated core with end rings thereon, and a series of compound connecting bars disposed in a peripheral series on said core, each bar including an inner core of high-reactance material and an outer covering of low impedance material. 1 igned at Chicago this 9th day of May,
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Induction Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
Description
A. KIMBLE.
INDUCTION MOTOR.
APPLICATION man MAYIZI 1919.
1 ,375,461 Patented Apr. 19, 1921.
- UNITED5TATEs PATENT 0 wnns'a'o, WISCONSIN, ASSIGNOB rommraoiqqmg i-wnnsam-wisconsm, A CORPORATION or WIBCONSIN.1 I
INDUCTION-MOTOR.
Specification of Letters Patent. v Patented Apr, 19, 1921,
Application filed May 12, 1919. Serial No. 296,649.
Toallrwkomitma concern:
Be it known t at I, AUs'rrN KIMBLE, a citizen of the United States of America, and a resident. of Wausau, county of Marathon, and State ofjWisconsin, have invented certain. new. and useful Improvements in Induction-Motors, of which the following is a-specification. V j
This invention relates to squirrel cage structures for dynamo-electric machines, and to methods of forming same.
The main objects of the invention are to provide an improved form of conductor adapted to serve as a squirrel cage bar and capable of readily transmitting large currents of low frequency or of non-alternating character, but offering relatively high impedance to alternating currents of high frequency; and to provide-a squirrel cage rotor having improved ventilating means.
An illustrative embodiment of this invention is shown in the accompanying drawings, in which Figure 1 is a longitudinal section on the line 11 of Fi 2, of a squirrel cage rotor, one side bein iiroken away.'
Fig. 2 is su stantially an end view of the rotor with the shaft and the projecting ends of the squirrel ca e bars shown in section on the line 22 of %i 1.
In the construction shown in the drawings, the rotor comprises a laminated core 1 secured by threaded clamping rings 2 on the shaft 3. The squirrel cage carried by said core includes'a pair of end rings 1 and a peripheral series of bars 5 connecting'said rings. Each bar 5 consists of a core 6. of high reactance metal and a coating or sheath of low impedance metal, cast-iron rods being well adapted to serve as cores, and an electro-deposlt of copper being best adapted 'to serve as the covering 7. The said bars are disposed in slots 8 and are secured to the end rings in a substantially integral manner by any approved means, preferably brazing, as shown at 9.
The method of, forming and assembling the several parts is as follows: The bars for the squirrel cage are cut in suitable lengths from copper-plated stock, which may be supplied in any lengths which commercial convenience ma determine. The cores are assembled in t e usual manner as understood-in the art, andthe end rings 4 are applied thereto, after wh'ch thebars 5 are set into place and arrang d to project an equal distance at each end for ventilating purposes and are secured as above explained.
Although the compound bars 5 are not necessarily limited to the cylindrical sheath and core form shown, still the concentric distribution of the copper about the iron is considered best, as it is most favorable to the transmission of hi h frequency current. This form is also a vantageous' asbeing adapted for ready manufacture. v
Although the core openings for the bars 5. are designated as slots, it is to be understood that they may be of any approved form, including tubular perforations disposed adjacent to the core surface.
The operation of the machine is as follows: In starting the motor, the bars offer a relatively high egree of impedance, due to the high frequency of the current which tends to flow therein,'but as the machine comes up to speed, the frequency diminishes until, at or near synchronism, the current becomes substantially constant and unidirectional, so that the reactance becomes negligible and only the low ohmic resistance of the circuit has to be overcome.
Although but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous details of the construction shown may be altered or omitted without departing fromthe spirit of this invention as defined by thefollowing claims.
I claim: 1. A squirrel ca e winding comprising a air of low impe ance end rings, in comination with a peripheral series of compound bars connecting said rings, each bar including a core of high-reactance metal and a covering of low impedance metal.
2. A squirrel cage motor .device of the character described, comprising a laminated core with end rings thereon, and a series of compound connecting bars disposed in a peripheral series on said core, each bar including an inner core of high-reactance material and an outer covering of low impedance material. 1 igned at Chicago this 9th day of May,
AUSTIN KIMBLE.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US296649A US1375461A (en) | 1919-05-12 | 1919-05-12 | Induction-motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US296649A US1375461A (en) | 1919-05-12 | 1919-05-12 | Induction-motor |
Publications (1)
Publication Number | Publication Date |
---|---|
US1375461A true US1375461A (en) | 1921-04-19 |
Family
ID=23142925
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US296649A Expired - Lifetime US1375461A (en) | 1919-05-12 | 1919-05-12 | Induction-motor |
Country Status (1)
Country | Link |
---|---|
US (1) | US1375461A (en) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2419839A (en) * | 1943-10-23 | 1947-04-29 | Gen Electric | Damper winding for synchronous machines |
US2433671A (en) * | 1944-06-24 | 1947-12-30 | Gen Electric | Composite conductor for dynamoelectric machines |
US2563562A (en) * | 1951-08-07 | Electric motor drive | ||
US3513342A (en) * | 1965-02-06 | 1970-05-19 | Todor Sabev | Rotor for alternating-current machines |
US5422527A (en) * | 1994-07-07 | 1995-06-06 | General Electric Company | X-ray tube target drive rotor |
US5818141A (en) * | 1996-09-05 | 1998-10-06 | The United States Of America As Represented By The Secretary Of The Navy | Squirrel cage type electric motor rotor assembly |
US20050040726A1 (en) * | 2003-08-18 | 2005-02-24 | Toshihiro Sato | Induction motor and rotor therefor |
US20060066158A1 (en) * | 2004-09-30 | 2006-03-30 | Pizzichil William P | High mechanical strength electrical connection system and method |
US20070062026A1 (en) * | 2005-09-20 | 2007-03-22 | Pizzichil William P | Fabricated rotor assembly fixture and method |
US20120169158A1 (en) * | 2009-09-17 | 2012-07-05 | Siemens Aktiengesellschaft | Cooling system for an asynchronous rotor |
US10181775B2 (en) * | 2015-04-14 | 2019-01-15 | Audi Ag | Rotor of an asynchronous machine |
-
1919
- 1919-05-12 US US296649A patent/US1375461A/en not_active Expired - Lifetime
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2563562A (en) * | 1951-08-07 | Electric motor drive | ||
US2419839A (en) * | 1943-10-23 | 1947-04-29 | Gen Electric | Damper winding for synchronous machines |
US2433671A (en) * | 1944-06-24 | 1947-12-30 | Gen Electric | Composite conductor for dynamoelectric machines |
US3513342A (en) * | 1965-02-06 | 1970-05-19 | Todor Sabev | Rotor for alternating-current machines |
US5422527A (en) * | 1994-07-07 | 1995-06-06 | General Electric Company | X-ray tube target drive rotor |
US5818141A (en) * | 1996-09-05 | 1998-10-06 | The United States Of America As Represented By The Secretary Of The Navy | Squirrel cage type electric motor rotor assembly |
US7019428B2 (en) * | 2003-08-18 | 2006-03-28 | Asmo Co., Ltd. | Induction motor and rotor therefor |
FR2859049A1 (en) * | 2003-08-18 | 2005-02-25 | Asmo Co Ltd | Squirrel cage rotor for induction motor, has end rings with support holes circumferentially aligned in periphery part, and conducting units supported at support part of corresponding support holes |
US20050040726A1 (en) * | 2003-08-18 | 2005-02-24 | Toshihiro Sato | Induction motor and rotor therefor |
US20060066158A1 (en) * | 2004-09-30 | 2006-03-30 | Pizzichil William P | High mechanical strength electrical connection system and method |
US7336013B2 (en) * | 2004-09-30 | 2008-02-26 | Reliance Electric Technologies, Llc | High mechanical strength electrical connection system and method |
US20070062026A1 (en) * | 2005-09-20 | 2007-03-22 | Pizzichil William P | Fabricated rotor assembly fixture and method |
US7451538B2 (en) | 2005-09-20 | 2008-11-18 | Reliance Electric Technologies, Llc | Method for fabricating rotor assembly |
US20120169158A1 (en) * | 2009-09-17 | 2012-07-05 | Siemens Aktiengesellschaft | Cooling system for an asynchronous rotor |
US9515536B2 (en) * | 2009-09-17 | 2016-12-06 | Siemens Aktiengesellschaft | Cooling system for an asynchronous rotor |
US10181775B2 (en) * | 2015-04-14 | 2019-01-15 | Audi Ag | Rotor of an asynchronous machine |
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