WO2001005015A2 - Magnetic core of electric rotational machines made of grain-oriented sheets - Google Patents
Magnetic core of electric rotational machines made of grain-oriented sheets Download PDFInfo
- Publication number
- WO2001005015A2 WO2001005015A2 PCT/HR2000/000028 HR0000028W WO0105015A2 WO 2001005015 A2 WO2001005015 A2 WO 2001005015A2 HR 0000028 W HR0000028 W HR 0000028W WO 0105015 A2 WO0105015 A2 WO 0105015A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- magnetic core
- cut out
- joke
- grain
- core
- Prior art date
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
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/16—Stator cores with slots for windings
Definitions
- This invention refers to design of laminated magnetic core of electric rotational machines (generators and motors)
- Laminated magnetic core of electric rotational machines is exposed to alternating (mostly sinusoidal) magnetic field Alternating the direction of magnetic field generate the energy losses which heat the core To decrease the losses and increase the efficiency of machine there is the need of use the materials with better magnetic characteristics
- the material with the lowest energy losses is cold rolled grain oriented steel sheet This material is not used in rotational machines because it has good characteristics only in one direction of magnetic field and in magnetic core of electrical rotational machines magnetic field has different directions even changing through the time
- the segment of stator sheet is cut out so that joke part and teeth part are cut out separately in such shape that end of tooth part fit into cut out shape of joke part
- the shape of connection line of tooth and joke part is not the same from layer to layer They are made so that they overlap from layer to layer (similar known term from transformer cores is step-lap). By that way the conducting contact at the sheets edges is avoid which means lower eddy-current losses. The same way the radial edges of joke part overlap form layer to layer.
- Laminated magnetic core of electric rotational machines made of grain-oriented sheets in integral assembled form is the same shape as usual core so can be used in the same way.
- FIG. 1 Cross-section of usual magnetic circuit sinchronous electric salient-pole machine
- Figure 4 Parts of sheet segment of rotational electric machine magnetic core made of grain-oriented sheets
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Ignition Installations For Internal Combustion Engines (AREA)
- Electromagnets (AREA)
- Soft Magnetic Materials (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
Laminated magnetic core of electric rotational machines made of grain oriented sheets made such that the core is divided in radial direction into two parts First part are the teeth where direction of magnetic orientation of the sheet is radial and second is joke where direction of magnetic orientation of the sheet is tangential. Connection between this two parts is designed so that at assembling segment of tooth is placed in adequate groove cut out in segment of yoke. Sheets are cut out so that connection line of tooth and joke part overlap from layer to layer.
Description
MAGNETIC CORE OF ELECTRIC ROTATIONAL MACHINES MADE
OF GRAIN-ORIENTED SHEETS
Technical Field
This invention refers to design of laminated magnetic core of electric rotational machines (generators and motors)
Laminated magnetic core of electric rotational machines is exposed to alternating (mostly sinusoidal) magnetic field Alternating the direction of magnetic field generate the energy losses which heat the core To decrease the losses and increase the efficiency of machine there is the need of use the materials with better magnetic characteristics The material with the lowest energy losses is cold rolled grain oriented steel sheet This material is not used in rotational machines because it has good characteristics only in one direction of magnetic field and in magnetic core of electrical rotational machines magnetic field has different directions even changing through the time
Background art
Existing design of magnetic core of electric rotational machines use grain-nononented sheets which has inferior characteristics than grain-oriented sheets but those characteristics are the same in all directions of magnetic field Grain-oriented sheets are used only in transformers where the magnetic field is mostly in one direction and sheets can be adduced to the that direction
Disclosure of invention
Design of laminated magnetic core of electric rotational machines made of grain-oriented sheets is such that the core is divided in radial direction into two parts First part are the teeth where direction of magnetic field is radial and second is joke where direction of magnetic field is mostly tangential Joke part and teeth part are assembled together in one integral core
The segment of stator sheet is cut out so that joke part and teeth part are cut out separately in such shape that end of tooth part fit into cut out shape of joke part The shape of connection line of tooth and joke part is not the same from layer to layer They are made so that they overlap from layer to layer (similar known term from transformer
cores is step-lap). By that way the conducting contact at the sheets edges is avoid which means lower eddy-current losses. The same way the radial edges of joke part overlap form layer to layer.
Laminated magnetic core of electric rotational machines made of grain-oriented sheets in integral assembled form is the same shape as usual core so can be used in the same way.
Dawings
Figure 1 Cross-section of usual magnetic circuit sinchronous electric salient-pole machine
Figure 2 Usual sheet segment of rotational electric machine magnetic core
Figure 3 Sheet segment of rotational electric machine magnetic core made of grain-oriented sheets
Figure 4 Parts of sheet segment of rotational electric machine magnetic core made of grain-oriented sheets
Figure 5 teeth overlap of two adjoining sheet layers
List of drawings designations:
1 - magnetic core of rotational electric machine
2 - joke
3 - grooves for coils
4 - magnetic field direction
5 - magnetic sheet direction
6 - segment of joke part
8 - segment of tooth part
9 - cut out shape for connection of tooth part to joke part
Claims
1. Laminated magnetic core of electric rotational machines made of grain-oriented sheets designated that segments of teeth and joke are separately cut out and at assembling the core they are connected so that segment of tooth is placed in adequate groove cut out in segment of yoke.
2. Laminated magnetic core from claim 1 designated that joke part is cut out so that magnetic orientation of sheet is approximately tangential
3. Laminated magnetic core from claim 1 designated that teeth part is cut out so that magnetic orientation of sheet is approximately radial (longitudinal to the teeth)
4. Laminated magnetic core from claim 1 designated that sheets are cut out so that connection line of tooth and joke part overlap from layer to layer
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU58345/00A AU5834500A (en) | 1999-07-14 | 2000-07-11 | Magnetic core of electric rotational machines made of grain-oriented sheets |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HRP990222A | 1999-07-14 | ||
| HR990222A HRP990222A2 (en) | 1999-07-14 | 1999-07-14 | Magnetic core of alternative part of rotary engines made of magnetic sheet metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2001005015A2 true WO2001005015A2 (en) | 2001-01-18 |
Family
ID=10946951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/HR2000/000028 WO2001005015A2 (en) | 1999-07-14 | 2000-07-11 | Magnetic core of electric rotational machines made of grain-oriented sheets |
Country Status (3)
| Country | Link |
|---|---|
| AU (1) | AU5834500A (en) |
| HR (1) | HRP990222A2 (en) |
| WO (1) | WO2001005015A2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011014934A1 (en) | 2009-08-03 | 2011-02-10 | Atlas Copco Airpower | Turbocompressor system |
| US20160226327A1 (en) | 2015-01-30 | 2016-08-04 | Prippel Technologies, Llc | Electric machine stator with liquid cooled teeth |
| US9985500B2 (en) | 2014-03-27 | 2018-05-29 | Prippell Technologies, Llc | Induction motor with transverse liquid cooled rotor and stator |
| US10060682B2 (en) | 2014-07-25 | 2018-08-28 | Prippell Technologies, Llc | Fluid-cooled wound strip structure |
| US11255612B2 (en) | 2014-07-25 | 2022-02-22 | Enure, Inc. | Wound strip machine |
-
1999
- 1999-07-14 HR HR990222A patent/HRP990222A2/en not_active Application Discontinuation
-
2000
- 2000-07-11 WO PCT/HR2000/000028 patent/WO2001005015A2/en unknown
- 2000-07-11 AU AU58345/00A patent/AU5834500A/en not_active Abandoned
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011014934A1 (en) | 2009-08-03 | 2011-02-10 | Atlas Copco Airpower | Turbocompressor system |
| US9470238B2 (en) | 2009-08-03 | 2016-10-18 | Atlas Copco Airpower, Naamloze Vennootschap | Electric motor having segmented stator windings |
| US9985500B2 (en) | 2014-03-27 | 2018-05-29 | Prippell Technologies, Llc | Induction motor with transverse liquid cooled rotor and stator |
| US10060682B2 (en) | 2014-07-25 | 2018-08-28 | Prippell Technologies, Llc | Fluid-cooled wound strip structure |
| US11255612B2 (en) | 2014-07-25 | 2022-02-22 | Enure, Inc. | Wound strip machine |
| US20160226327A1 (en) | 2015-01-30 | 2016-08-04 | Prippel Technologies, Llc | Electric machine stator with liquid cooled teeth |
| US10411563B2 (en) | 2015-01-30 | 2019-09-10 | Prippell Technologies, Llc | Electric machine stator with liquid cooled teeth |
| US10790728B2 (en) | 2015-01-30 | 2020-09-29 | Enure, Inc. | Electric machine stator with liquid cooled teeth |
Also Published As
| Publication number | Publication date |
|---|---|
| HRP990222A2 (en) | 2001-10-31 |
| AU5834500A (en) | 2001-01-30 |
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