GB2606896A - A field coil for an electric machine - Google Patents
A field coil for an electric machine Download PDFInfo
- Publication number
- GB2606896A GB2606896A GB2209422.1A GB202209422A GB2606896A GB 2606896 A GB2606896 A GB 2606896A GB 202209422 A GB202209422 A GB 202209422A GB 2606896 A GB2606896 A GB 2606896A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pcb
- field coil
- conductive
- electric machine
- track
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K3/00—Details of windings
- H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
- H02K3/26—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors consisting of printed conductors
-
- 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
- H02K1/14—Stator cores with salient poles
- H02K1/146—Stator cores with salient poles consisting of a generally annular yoke with salient poles
-
- 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
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/04—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of windings, prior to mounting into machines
- H02K15/0407—Windings manufactured by etching, printing or stamping the complete coil
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
- H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
- H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Windings For Motors And Generators (AREA)
Abstract
The invention provides a field coil for an electric machine. The field coil is formed from a multi-layer printed circuit board (PCB) wherein each of a plurality of layers of the PCB has thereon a conductive track comprising a coiled winding pattern. The conductive tracks of said plurality of layers of the PCB are conductively connected together to form a stack of conductive tracks in a direction normal to a plane of the PCB. The conductive tracks are conductively connected so as to form a continuous conductive track through the stack of conductive tracks of the PCB. Said stack of conductively connected tracks emulates a field coil for said electric machine. An electric machine is formed from a plurality of said field coils.
Claims (34)
1. A field coil for an electric machine, comprising: a multi-layer printed circuit board (PCB) wherein each of a plurality of layers of the PCB has thereon a conductive track comprising a coiled winding pattern, the conductive tracks of said plurality of layers of the PCB being conductively connected together to form a stack of conductive tracks in a direction normal to a plane of the PCB, said stack of conductively connected tracks being arranged so as to emulate a field coil for said electric machine.
2. The field coil according to claim 1, wherein said plurality of conductively connected tracks are axially aligned in the direction normal to a plane of the PCB around a winding pattern axis with said tracks being arranged to wind in a same direction around said axis.
3. The field coil according to claim 1 or claim 2, wherein the conductive track comprises two or more spirals.
4. The field coil according to claim 3, wherein the conductive track comprises at least an outer spiral track and an inner spiral track, said outer spiral track substantially surrounding said inner spiral track and said outer and inner spiral tracks comprising a continuous conductive track.
5. The field coil according to claim 4, wherein a conductive track on one layer of the PCB is conductively connected to a next conductive track on a lower layer of the PCB by connecting an inner free end of the inner spiral track on said one layer of the PCB to an outer free end of the outer spiral track of said next conductive track on a lower layer of the PCB.
6. The field coil according to claim 4 or claim 5, wherein a conductive track on one layer of the PCB is conductively connected to a next conductive track on a higher layer of the PCB by connecting an outer free end of the outer spiral track on said one layer of the PCB to an inner free end of the inner spiral track of said next conductive track on a higher layer of the PCB.
7. The field coil according to claim 6, wherein an outer free end of a topmost conductive track in the stack of conductive tracks comprises a first terminal of the field coil.
8. The field coil according to claim 7, wherein said first terminal can be terminated at a solder point and/or electrical connector on the PCB layer including the topmost conductive track in the stack of conductive tracks.
9. The field coil according to claim 7 or claim 8, wherein the PCB layer including the topmost conductive track in the stack of conductive tracks is not the uppermost layer of the PCB.
10. The field coil according to any one of claims 6 to 9, wherein an inner free end of a lowermost conductive track in the stack of conductive tracks comprises a second terminal of the field coil.
11. The field coil according to claim 10, wherein said second terminal can be terminated at a solder point and/or electrical connector on the PCB layer including the lowermost conductive track in the stack of conductive tracks.
12. The field coil according to claim 10 or claim 11, wherein the PCB layer including the low'ermost conductive track in the stack of conductive tracks is not the lowermost layer of the PCB.
13. The field coil according to any one of the preceding claims, wherein the conductive tracks of said plurality of layers of the PCB are conductively connected to form a continuous track through the stack of stack of conductive tracks.
14. The field coil according to any of claims 4 to 13, wherein two or more of the plurality of layers of the PCB are provided with pathways therethrough to provide conductive connections between the conductive tracks on said plurality of layers of the PCB.
15. The field coil according to claim 14, wherein said pathways comprise one or more vias extending through two or more layers of the PCB .
16. The field coil according to any one of the preceding claims, wherein the conductive tracks on the plurality of layers of the PCB are substantially identical.
17. The field coil according to any one of claims 1 to 15, wherein the shape and/or size of the conductive tracks through the stack of conductive tracks vary in a predetermined manner to define the shape of the field coil in the direction normal to the plane of the PCB .
18. The field coil according to any one of the preceding claims, wherein the plurality of layers of the PCB comprise about 5 to 20 layers.
19. The field coil according to any one of the preceding claims, wherein the conductive tracks define an oval shaped field coil, a circular shaped field coil, a triangular shaped field coil, a rectangular shaped field coil or a square shaped field coil about an axis of the field coil.
20. The field coil according to any one of the preceding claims, wherein the conductive track on each layer of the PCB has a width of about 1mm about to 2.5mm with a spacing between spirals of the conductive track of greater than about 0.2mm.
21. An electric machine, comprising: a stator; and a rotor arranged to rotate relative to said stator; wherein at least the rotor and/or the stator comprises a plurality of the field coils of any one of claims 1 to 20.
22. The electric machine according to claim 21, wherein said electric machine is a radial flux electric motor or a radial flux electric generator.
23. The electric machine according to claim 21 or claim 22, wherein the plurality of field coils is arranged around a central space for accommodating the rotor.
24. The electric machine according to claim 21 or claim 22, wherein the plurality of field coils is arranged around a central space for accommodating a stator, said plurality of field coils being arranged to rotate around said stator.
25. The electric machine according to claim 21 or claim 22, wherein the plurality of field coils is arranged in a central space surrounded by a stator, said plurality of field coils being arranged to rotate relative to said stator.
26. The electric machine according to claim 21 or claim 22, wherein the stator comprises a plurality of the field coils and the rotor comprises a permanent magnet.
27. The electric machine according to claim 26, wherein the stator and the rotor comprise a brushless direct current BLDC) motor.
28. The electric machine according to any one of claims 21 to 27, wherein each field coil is mounted on a magnetised core with its conductively connected winding pattern winding in a same direction as all other field coils.
29. The electric machine according to claim 28, wherein the magnetised core is not laminated.
30. The electric machine according to any one of claims 21 to 29, wherein the electric machine has an even number of field coils.
31. The electric machine of claim 30, wherein t even number of field coils are arranged in pairs facing each other.
32. The electric machine according any one of claims 21 to 31, wherein the electric motor comprises a DC motor or a AC motor.
33. A method of manufacturing a field coil for an electric machine, comprising the steps of: providing a coiled conductive winding pattern track on a plurality of layers of a printed circuit board (PCB); conductively connecting the conductive tracks of said plurality of layers of the PCB together to form a stack of conductive tracks in a direction normal to a plane of the PCB comprising a continuous conductive track through said stack; and arranging said stack of conductively connected tracks to emulate a field coil for said electric machine.
34. A method of manufacturing an electric machine, comprising the steps of: providing a stator; and providing a rotor arranged to rotate relative to said stator, said stator being formed of a plurality of field coils of any one of claims 1 to 20.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HK22019000040 | 2019-12-19 | ||
| PCT/EP2020/087005 WO2021123152A1 (en) | 2019-12-19 | 2020-12-18 | A field coil for an electric machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB202209422D0 GB202209422D0 (en) | 2022-08-10 |
| GB2606896A true GB2606896A (en) | 2022-11-23 |
Family
ID=74141504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2209422.1A Pending GB2606896A (en) | 2019-12-19 | 2020-12-18 | A field coil for an electric machine |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2606896A (en) |
| WO (1) | WO2021123152A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113852228B (en) * | 2021-10-13 | 2023-06-20 | 重庆希弗节能技术有限公司 | Excitation controllable motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09121490A (en) * | 1995-10-23 | 1997-05-06 | Mitsubishi Electric Corp | Method of manufacturing coil retainer |
| JP2001258192A (en) * | 2000-03-09 | 2001-09-21 | Mitsubishi Electric Corp | Winding stator and its manufacture |
| EP1806823A1 (en) * | 2006-01-05 | 2007-07-11 | Franco Policante | Radial-flow electric motor with improvements in the composition of the stator windings. |
| WO2015007456A2 (en) * | 2013-07-18 | 2015-01-22 | Zf Friedrichshafen Ag | Coil assembly, stator assembly, electric machine and method for producing a stator |
-
2020
- 2020-12-18 GB GB2209422.1A patent/GB2606896A/en active Pending
- 2020-12-18 WO PCT/EP2020/087005 patent/WO2021123152A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09121490A (en) * | 1995-10-23 | 1997-05-06 | Mitsubishi Electric Corp | Method of manufacturing coil retainer |
| JP2001258192A (en) * | 2000-03-09 | 2001-09-21 | Mitsubishi Electric Corp | Winding stator and its manufacture |
| EP1806823A1 (en) * | 2006-01-05 | 2007-07-11 | Franco Policante | Radial-flow electric motor with improvements in the composition of the stator windings. |
| WO2015007456A2 (en) * | 2013-07-18 | 2015-01-22 | Zf Friedrichshafen Ag | Coil assembly, stator assembly, electric machine and method for producing a stator |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021123152A1 (en) | 2021-06-24 |
| GB202209422D0 (en) | 2022-08-10 |
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