CN101394109B - Magnetic flux guiding device for electric machine - Google Patents
Magnetic flux guiding device for electric machine Download PDFInfo
- Publication number
- CN101394109B CN101394109B CN2008101497213A CN200810149721A CN101394109B CN 101394109 B CN101394109 B CN 101394109B CN 2008101497213 A CN2008101497213 A CN 2008101497213A CN 200810149721 A CN200810149721 A CN 200810149721A CN 101394109 B CN101394109 B CN 101394109B
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- China
- Prior art keywords
- thin plate
- magnetic flux
- flux guiding
- zone
- guiding device
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- 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 - Fee Related
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- 230000004907 flux Effects 0.000 title claims abstract description 58
- 239000000696 magnetic material Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims description 34
- 238000005520 cutting process Methods 0.000 claims description 17
- 239000000463 material Substances 0.000 claims description 13
- 230000000994 depressogenic effect Effects 0.000 claims description 8
- 238000003825 pressing Methods 0.000 claims description 5
- 230000001629 suppression Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 208000004350 Strabismus Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000003447 ipsilateral effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
Images
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
- H02K1/246—Variable reluctance rotors
Abstract
The invention relates to a magnetic flux guiding device for electric motors, which comprises a plurality of overlappedly arranged sheets (4) made of magnetic materials, wherein the sheets (4) are preferably uniform and have reduced thickness in at least an area (5), and the sheets (4) is overlappedly arranged on the arrangement direction, so as to form at least an area with improved magnetic resistance in the magnetic flux guiding device.
Description
Technical field
The present invention relates to a kind of magnetic flux guiding device that is used for motor, the thin plate that it has a plurality of overlapping settings the invention still further relates to the method that a kind of rotor arrangement and a kind of manufacturing are used for the thin plate of magnetic flux guiding device.
Background technology
Usually use the thin plate of processing with magnetic material in order to constitute motor, thin plate is assembled into together for the magnetic flux in the magnetic field that will be caused by permanent magnet or coil is directed at rotor arrangement or stator apparatus.Thin plate is usually by range upon range of or pile up and be linked to be the folded group of plate with suitable manner.
For motor, make every effort to let most of magnetic flux flow out from corresponding magnetic flux device.Be necessary to reduce as far as possible or eliminate the magnet short-cut path in the magnetic flux guiding device for this reason.
In open source literature DE 199 15 664 A1, disclose a kind of rotor arrangement, it constitutes as the folded group of the plate that is formed by the thin plate with different plates blanking.The material groove that part thin plate has in corresponding thin plate as grooving, curved line or other geometry constitutes the magnetic flux resistance.When building up thin plate layer the folded group of plate, therefore form zone that does not have magnetic material or the zone that effectively total cross section of magnetic material reduces for adjacent area.Make thus and be prevented from or reduce greatly through these regional magnetic fluxs.
Especially for last-mentioned modification, in order to reduce the magnetic flux through the earial drainage path by the material section that reduces, different plate cuttings are necessary.It is expensive in the stacked structure of magnetic flux guiding device, to use different plate cuttings to have, and also needs different stamping tools, wherein plate cutting operate in technical also expend a lot of.
For for the rotor arrangement among European patent application EP 1 223 658 A1, in order to reduce the magnetic flux through the earial drainage path by the material section that reduces, different plate cuttings also is necessary.
Summary of the invention
So; The objective of the invention is to; A kind of magnetic flux guiding device and a kind of method that is used to make magnetic flux guiding device are provided, the zone that reduces magnetic flux (raising magnetic resistance) wherein can be set, different plate cuttings need not be set in order to constitute magnetic flux guiding device.
The present invention proposes a kind of magnetic flux guiding device that is used for motor for this reason; Has thin plate a plurality of overlapping settings, that constitute by magnetic material; Wherein, Thin plate has the thickness that reduces at least one zone, and thin plate is provided with being provided with on the direction with overlapping each other, so that in magnetic flux guiding device, form the zone that at least one magnetic resistance improves.
Simultaneously, the present invention also proposes the method that a kind of manufacturing is used for the thin plate of magnetic flux guiding device, and this thin plate has outline and is used to hold the groove of permanent magnet and/or coil device with at least one, has following steps:
-at first cut material plate, thus thin plate formed with auxiliary flute;
-next make plate forming, thus sheet material has depressed part in the zone, to be used for constituting the zone that thickness reduces;
-in the section of auxiliary flute, thin plate is carried out the cutting second time, so that groove substitutes auxiliary flute fully.
From first viewpoint magnetic flux guiding device that is used for motor is provided, its have a plurality of overlap each other be provided with, by the magnetic material thin plate that constitutes of pure iron material for example.Thin plate has the thickness that reduces at least one zone, wherein thin plate, especially is directed against transversely in the magnetic flux of the direction that direction is set to be used in magnetic flux guiding device, the forming zone that at least one magnetic resistance improves in that setting on the direction is being set with overlapping each other.
The thin plate of magnetic flux guiding device can be especially identical and at least one zone, have the thickness that reduces, wherein, the zone in order to provide at least one magnetic resistance to improve is provided with thin plate overlappingly, make zone that thickness reduces be provided with on the direction overlapping.
Top magnetic flux guiding device has been realized constituting magnetic flux guiding device with same kind or identical thin plate with preferred mode, thereby makes manufacturing cost wait that owing to simplifying the operation of piling up thin plate is able to reduce greatly.In addition, single thin plate can connect mutually owing to its higher autostability more reliably.
In addition, thin plate can also constitute identically and transverse to the direction skew being set and/or centering on the setting of direction deflection ground is set each other, thereby thin plate is set in a plurality of different deviation posts or inflection point.Especially; The quantity that is separately positioned on the thin plate on same offset position or the inflection point especially should be always identical on two different deviation posts or inflection point, so that when the magnetic flux guiding device that uses as rotor arrangement, avoid because the degree of unbalance of the rotor arrangement that uneven mass distribution causes.
In addition, the zone that reduces of at least one thickness can be through one or more depressed parts, especially be located on the one or both sides of thin plate through pressing part.Especially can let zone passage that said at least one thickness reduces the thin plate both sides, opposed at least in part depressed part forms each other.
In one embodiment, the rotor arrangement that magnetic flux guiding device can be used as motor constitutes, and wherein rotor arrangement has the groove that at least one is used to hold permanent magnet, and said zone is set at low magnetic flux more or does not need the place of magnetic flux on thin plate.
Can let in addition one of zone that thickness reduces relatively radial direction be arranged between the inside edge of axis and groove of rotor arrangement.As substitute or additional aspects can let one of zone that thickness reduces relatively the radial direction outermost edges that is arranged on relative groove also want outer place.
Can let magnetic flux guiding device constitute as alternative or additional aspects as the stator apparatus of motor.
From the method that another viewpoint provides a kind of manufacturing to be used for the thin plate of magnetic flux guiding device, thin plate has outline and is used to hold the groove of permanent magnet and/or coil device with at least one.The step that this method comprises has: thus at first cut material plate and form thin plate with auxiliary flute; Next to sheet forming, thereby sheet material has depressed part to be used for constituting the zone that thickness reduces in a zone; In the section of auxiliary flute, thin plate is carried out the cutting second time then, so that groove substitutes auxiliary flute fully.Cutting can be carried out in stamping procedure.
In addition, auxiliary flute can have at least one and is positioned at the edge section within the groove to be formed.
Thin plate can form the local at least profile that amplifies in cutting for the first time, this profile can be cut into the profile of thin plate to be formed when thin plate being carried out cut for the second time.
Description of drawings
Fig. 1 is perpendicular to the rotor arrangement sectional view of rotor axial direction;
Fig. 2 is to show the intercepting part of rotor arrangement shown in Figure 1 along the axial sectional view of rotor arrangement;
The intercepting part of Fig. 3 to 5 through the thin plate of rotor arrangement shown in Figure 1 is with the method state shown in the cross section;
Fig. 6 illustrates the different modification of the pressing part of the thin plate that is used to constitute rotor arrangement.
Embodiment
The present invention can be used on the magnetic flux guiding device in the motor, for example is used in stationary apparatus and rotating device, just on stator apparatus and the rotor arrangement.By rotor arrangement thought of the present invention is done detailed explaination below.
Fig. 1 illustrates the cross section of electric machine rotor device 1, and rotor arrangement 1 constitutes (see figure 2) by thin plate 4, the for example pressing sheet material processed with magnetic material (for example iron) range upon range ofly.Cross section display surface the extending axially of Fig. 1 perpendicular to rotor arrangement 1.
Rotor arrangement 1 has groove 2 and the permanent magnet (not shown) is set within it being used for.Rotor arrangement 1 is provided with axis hole 3; So that rotor arrangement 1 is installed on the axle 3; Its measure is individually to be installed on the axle 3 plate that is formed by the thin plate of being processed by magnetic material 4 that is laminated to each other is folded, perhaps before being installed on the axle, piles up as the folded group of plate and integrally is installed on the axle.
The rotor arrangement of Fig. 1 is made up of the thin plate 4 of same type, for example its that kind shown in vertically the sectional view in Fig. 2.Single thin plate 4 is according to the such moulding of vertical view as shown in Figure 1 and in its cross section, have the shape of that kind as shown in Figure 2.Thin plate 4 radially below just towards the axis and just between the outermost edges of the outline of external thin plate and corresponding recesses, have the zone 5 that thickness reduces up, zone 5 is preferably opposite each other for the piling up of thin plate 4.Can certainly do following setting, that is, and zone 5 relative radial direction or be arranged in the outer section of the relative groove 2 of rotor arrangement 1, or be arranged in the inner section of the relative groove 2 of rotor arrangement 1.
The zone 5 that thickness reduces is arranged on should stoping as far as possible or reduce on the position of magnetic flux of rotor arrangement 1, because magnetic flux can reduce to have used the power capability of the motor of this rotor arrangement 1 as short-circuit flow.In other words should provide and have the zone that magnetic resistance improves.
For shown in for the rotor arrangement 1, permanent magnet is encased in the groove 2 as follows, that is, their extreme sensing tangential.Therefore, the zone that thickness reduces can be avoided or reduce through the magnet short-cut path of permanent magnet through rotor arrangement, thereby and guarantees to have the magnetic flux than great share outwards to send from rotor arrangement 1.
Shown in the advantage of rotor arrangement 1 be that the thin plate 4 that it can enough same types constitutes, and has lower processing cost thereby need the rotor arrangement 1 of different plates blanking to compare with other.Because the cause of its property of the same type, so single thin plate can also connect mutually better, reason is that single thin plate has higher autostability.And the operation of thin plate 4 also is able to simplify widely, and reason is in the process that is stacked into the folded group of plate, needn't consider different plate cuttings.
Use the thin plate of identical moulding also to have following advantage; Promptly; The degree of unbalance of the rotor arrangement that can reduce to constitute so especially is arranged on 4 last time of thin plate when groove 2 and regional 5, promptly as follows; Thin plate can reverse each other (for example turning over for example 360 ° of definite angles/(pole shoe number) respectively) and be provided with, and groove 2 and zone 5 also to axial direction keep each other being provided with opposed to each other.Utilize this method to make and the degree of unbalance that in single thin plate 4, causes be compensated with reversing with the folded group of the plate that constitutes rotor arrangement 1 through piling up thin plate 4 by the cutter accuracy.
Can let identical thin plate transverse to the direction skew being set and/or centering on direction deflection is set each other as replacement scheme, thereby thin plate is arranged in some different deviation posts or inflection point relative to one another.Thus one, the respective regions 5 that the thickness in the rotor arrangement 1 in the thin plate reduces forms the zones of different that magnetic resistance improve.The quantity that is separately positioned on the thin plate on same offset position or the inflection point especially should be always identical for two different deviation posts or inflection point, so that avoid because the degree of unbalance of the rotor arrangement that uneven mass distribution causes.
Thought of the present invention also can be transferred on the structure of the motor stator device that can be used as the folded group formation of the plate with the thin plate that piles up equally without doubt.For stator apparatus, the zone 5 that thickness reduces also be set at " magnetic flux within stator apparatus because the cause of low magnetic resistance and through and therefore make from stator apparatus, especially outwards just reduce towards the magnetic flux that sends of respective rotor device from stator tooth " the place.Not only stator apparatus but also rotor arrangement all are configured to hold permanent magnet and/or coil device.
In Fig. 3 to 5, illustrated and be used to make the method state that constitutes the method for the thin plate 4 of rotor arrangement shown in Fig. 1 and 2.Fig. 3 shows the method state according to first stamping procedure, goes out auxiliary flute 6 on the position of groove 2 wherein in the end to be formed, and auxiliary flute 6 integral body have with groove to be formed 2 compares less cross section.Auxiliary flute 6 especially has the edge that one or more grooves 2 to be formed relatively squint in the interior zone of groove to be formed 2.Auxiliary flute 6 has the edge apart, edge of groove 2 preferred and to be made.Groove 2 to be made illustrates in Fig. 3 by a dotted line, thereby the edge that can be clear that auxiliary flute 6 is positioned within the edge of groove to be made 2 fully.
In addition; The external diameter of rotor arrangement 1 selects greatlyyer in first stamping procedure; And that the interior grade of axis hole 3 that is used to hold axle of rotor arrangement gets is less, thereby plate cutting has as the result of first punch steps on the whole and is positioned on the seamed edge of treating sheeting 4 or is positioned at the seamed edge of treating outside the sheeting 4.
Method state when implementing ensuing suppression process has been shown in Fig. 4.Suppression process utilizes drift enforcement and makes the material contracts of thin plate 4.The zone 5 that thickness reduces illustrates by a dotted line.Can see, when compacting, owing to material during pressing is squeezed, so distortion on the outline of thin plate 4, occurs.
The profile of in first stamping procedure, going out before these distortion not only can exceed also can carry out within this profile scope.Because the seamed edge of the plate cutting of first stamping procedure exceeds the seamed edge of thin plate to be made at least in part, so distortion mainly appears at the scope outside the side cut that is positioned at thin plate to be made 4.Thereby the thin plate 4 that can in ensuing second stamping procedure, will cut and suppress strikes out final plate cutting.That is to say; Thin plate 4 is outline external diameters of reducing of the plate cutting with relative first stamping procedure and cuts with the internal diameter that becomes big axis hole 3 or punching out, and groove 2 is to cut from the slab that forms through first stamping procedure and ensuing suppression process according to the nominal amount of its expectation now.Relevant therewith method state is shown in Fig. 5.In Fig. 5 by being shown in dotted line the zone 5 that thickness reduces; Its in the radial direction relatively groove 2 be in the outside, that is to say also more outer than the outermost radial outside edge of groove 2 diametrically, and be in inside, that is to say in the radial direction also more inner than the inside edge of groove 2.
Replace stamping procedure, generally also can adopt the forming process of other similar type, like cutting operation.Replace suppression process also can use other that operation of area of reduced thickness can be provided on thin plate in addition, for example cut miller preface or etching work procedure.
In Fig. 6, illustrated and be used to form the various profiles with area of reduced thickness 5, it is processed in suppression process.During the compacting thin plate; The zone that thickness reduces not only can be processed through both sides; Also can process through a side pressure system; Can also utilize the identical or different drift of skew each other of size to carry out the both sides compacting, wherein press face preferably intersects in a zone at least, so that form the minimum thickness zone of thin plate 4 there.Certainly, on the not ipsilateral of thin plate, not to be provided with overlappingly also be fully passable in zone 5.
Claims (14)
1. the magnetic flux guiding device that is used for motor; Has thin plate a plurality of overlapping settings, that constitute by magnetic material; It is characterized in that; Thin plate (4) has the thickness that reduces at least one zone (5), and thin plate (4) is provided with being provided with on the direction with overlapping each other, so that in magnetic flux guiding device, form the zone that at least one magnetic resistance improves.
2. by the described magnetic flux guiding device of claim 1, it is characterized in that, thin plate (4) be set so overlappingly, make zone (5) that thickness reduces be provided with on the direction overlapping so that form the zone that said at least one magnetic resistance improves.
3. by claim 1 or 2 described magnetic flux guiding devices, it is characterized in that thin plate (4) is identical.
4. by the described magnetic flux guiding device of claim 1; It is characterized in that; Thin plate (4) constitutes identically, and transverse to the direction skew being set and/or centering on the setting of direction deflection ground is set each other, thereby thin plate (4) is set in a plurality of different deviation posts or inflection point.
5. by the described magnetic flux guiding device of claim 4, it is characterized in that the quantity that is separately positioned on the thin plate (4) on same offset position or the inflection point is always identical on two different deviation posts or inflection point.
6. by claim 1 or 2 described magnetic flux guiding devices, it is characterized in that the zone that at least one thickness reduces (5) are located on the one or both sides of thin plate (4) through one or more depressed parts.
7. by the described magnetic flux guiding device of claim 6, it is characterized in that, the zone that at least one thickness reduces (5) through said a plurality of thin plates (4) both sides, opposed at least in part depressed part forms each other.
8. by claim 1 or 2 described magnetic flux guiding devices; Said magnetic flux guiding device is configured to the rotor arrangement (1) of motor; This rotor arrangement (1) has the groove that at least one is used to hold permanent magnet, and wherein zone (5) is set at the place that need reduce magnetic flux or not need magnetic flux on thin plate (4).
9. by the described magnetic flux guiding device of claim 8; It is characterized in that; One of zone that thickness reduces (5) relatively radial direction is arranged between the inside edge of axis and groove (2) of rotor arrangement (1), and/or one of the zone (5) that reduces of thickness relatively radial direction be arranged on the outermost edges of relative groove (2) also will outer place.
10. by claim 1 or 2 described magnetic flux guiding devices, it is characterized in that magnetic flux guiding device is configured to the stator apparatus of motor.
11., it is characterized in that said one or more depressed parts are pressing part by the described magnetic flux guiding device of claim 6.
12. make the method for the thin plate (4) that is used for magnetic flux guiding device, this thin plate (4) has outline and is used to hold the groove (2) of permanent magnet and/or coil device with at least one, has following steps:
-at first cut material plate, thus thin plate (4) formed with auxiliary flute;
-next make plate forming, thus sheet material has depressed part in the zone, to be used for constituting the zone (5) that thickness reduces;
-in the section of auxiliary flute, thin plate (4) is carried out the cutting second time, so that groove (2) substitutes auxiliary flute fully.
13., it is characterized in that auxiliary flute has at least one and is positioned at the edge section within the groove to be formed (2) by the described method of claim 12.
14. by claim 12 or 13 described methods, wherein, thin plate (4) forms the local at least profile that amplifies in cutting for the first time, this profile is cut into the profile of thin plate to be formed (4) when thin plate (4) being carried out cut for the second time.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102007044799.1 | 2007-09-20 | ||
| DE200710044799 DE102007044799A1 (en) | 2007-09-20 | 2007-09-20 | Magnetic flux conducting arrangement for use as e.g. rotor arrangement of electric machine, has identical lamella sheets arranged on top of each other in direction of arrangement for forming area with increased magnetic resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101394109A CN101394109A (en) | 2009-03-25 |
| CN101394109B true CN101394109B (en) | 2012-09-26 |
Family
ID=40384096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008101497213A Expired - Fee Related CN101394109B (en) | 2007-09-20 | 2008-09-19 | Magnetic flux guiding device for electric machine |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101394109B (en) |
| DE (1) | DE102007044799A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102020214828A1 (en) | 2020-11-25 | 2022-05-25 | Robert Bosch Gesellschaft mit beschränkter Haftung | Stator for an electrical machine and associated electrical machine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002112475A (en) * | 2000-09-26 | 2002-04-12 | Hitachi Ltd | Permanent magnet rotating electric machine, air compressor and power generator using it |
| JP2005160170A (en) * | 2003-11-21 | 2005-06-16 | Fujitsu General Ltd | Motor |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19915664A1 (en) | 1999-04-07 | 2000-10-19 | Siemens Ag | Electrical machine with a stator |
| EP1223658A1 (en) | 2001-01-12 | 2002-07-17 | Siemens Aktiengesellschaft | Permanent magnet Rotor with reduced flux leakage |
-
2007
- 2007-09-20 DE DE200710044799 patent/DE102007044799A1/en not_active Ceased
-
2008
- 2008-09-19 CN CN2008101497213A patent/CN101394109B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002112475A (en) * | 2000-09-26 | 2002-04-12 | Hitachi Ltd | Permanent magnet rotating electric machine, air compressor and power generator using it |
| JP2005160170A (en) * | 2003-11-21 | 2005-06-16 | Fujitsu General Ltd | Motor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101394109A (en) | 2009-03-25 |
| DE102007044799A1 (en) | 2009-04-02 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20120926 Termination date: 20180919 |