CN101247062A - Electric rotating machine - Google Patents
Electric rotating machine Download PDFInfo
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- CN101247062A CN101247062A CNA200710085204XA CN200710085204A CN101247062A CN 101247062 A CN101247062 A CN 101247062A CN A200710085204X A CNA200710085204X A CN A200710085204XA CN 200710085204 A CN200710085204 A CN 200710085204A CN 101247062 A CN101247062 A CN 101247062A
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- shield member
- rotating machine
- electric rotating
- test section
- rotation test
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Abstract
The present invention leads to that the rotating position detector is not effected by the outer magnetic field, reduces the interference included in the output of the rotating position detector and prevents the false action of the rotating position detector. The rotating electric machine comprises the following components: a stator (2); a rotor (1) which has a rotation axis (4) and rotates axially with the stator (2); end caps (5) and (6) which support and fix the stator (2) and at the same time support the rotation axis (4) to facilitate the rotation; a rotating position detecting part (11) which is arranged on the rotation axis (4) at the side opposite to the load and detects the rotating position of the rotor (1); and a power part (18) which is arranged at the external circumferential side of the rotating position detecting part (11) and is provided with a switching element (9). In the rotating electric motor the rotating position detecting part (11) is arranged with a shielding component (12) which covers the external circumference to shield the magnetic field generated by the switching element (9).
Description
Technical field
The present invention relates to electric rotating machines such as a kind of motor, particularly a kind of switch element portion with position of rotation test section and control electric rotating machine electric current, be used for vehicle etc. and be arranged on small-sized electric rotating machine in the little space.
Background technology
For example, in the control device integral motor that in patent documentation 1, discloses, the control device shell is fixed on the end cap or support of an opposite side with load-side of motor, and cooling fan is installed on the end of an opposite side with load-side of the rotating shaft that runs through the control device shell.The position detector that inverter circuit is installed in the control device shell and is configured in the rotor of all sides in the inverter circuit.
[patent documentation 1] spy opens flat 11-27903 communique (4-5 page or leaf, Fig. 2)
Control the output adjustment of carrying out motor by ON/OFF to the switch element of inverter circuit.When switch element was worked, owing to the abrupt change in magnetic field takes place in the rapid variation that is accompanied by electric current, so this changes of magnetic field showed electromagnetic interference for miscellaneous equipment and circuit, might cause misoperation.
In the control device integral motor of above-mentioned patent documentation 1, because comprise the inverter circuit part of switch element and the close configuration of rotational position detector of rotor, so interference meeting that produces owing to above-mentioned magnetic field abrupt change and the output of rotational position detector stack produce the problem of surveying for the flase drop of rotor-position.
The present invention proposes in order to address the above problem just, and purpose is to reduce the interference that comprises in the output of rotational position detector, makes rotational position detector not be subjected to the influence of external magnetic field, thereby prevents the misoperation of rotational position detector.
Summary of the invention
Electric rotating machine related to the present invention has: stator, be fixed on the coaxial rotating shaft that is rotated of said stator on rotor, support and the fixing said stator position of rotation test section on distolateral, that detect the position of rotation of above-mentioned rotor supporting above-mentioned rotating shaft to make its end cap that can rotate simultaneously and be configured in above-mentioned rotating shaft, in this electric rotating machine
Above-mentioned position of rotation test section is provided with covers its periphery, with the shield member of shielding external magnetic field.
If adopt electric rotating machine related to the present invention, because be provided with the periphery that covers the position of rotation test section, with the shield member of shielding external magnetic field, so the most of conductively-closed member in magnetic field that produces in the outside of position of rotation test section absorbs, make the magnetic field intensity be distributed in the position of rotation test section obviously reduce, the interference level that is superimposed upon in the output of position of rotation test section can be reduced to the degree that can not make the misoperation of position of rotation test section.
Description of drawings
Fig. 1 is the schematic cross-section of the example 1 of expression electric rotating machine related to the present invention.
Fig. 2 is the end view from the periphery of axially seeing the position of rotation test section Fig. 1.
Fig. 3 is that the explanation shield member is for the major part amplification sectional view of power part to the effect of the influence of position of rotation test section.
Fig. 4 is the schematic cross-section of the stacked shield member of explanation.
Fig. 5 is that the explanation shield member is for the major part amplification sectional view of power part to the effect of the influence of position of rotation test section.
Fig. 6 is the schematic cross-section of the example 2 of expression electric rotating machine related to the present invention.
Fig. 7 is the table as a result that the effect of shield member is measured in expression.
Label declaration
1 rotor
2 stators
3 stator winding
4 rotating shafts
5 anti-load-side end caps
6 load-side end caps
8 brush portions
9 switch elements
10 radiators
11 position of rotation test sections
12,12a, 12b shield member
13 control circuits
15 shells
17 belt pulleys
18 power parts
19 spatial portions
20 eddy current
21 insulating barriers
22 good conductors
23 nonmagnetic layers
32 collector rings
33 rotor windings
Embodiment
Example of the present invention is described below with reference to the accompanying drawings.The example that the following describes is an example with the structure that control device is installed in the control device integrated rotating electric machine on the electric rotating machine, and this control device has offering the switch element portion that the electric current that is arranged on stator and epitrochanterian winding is controlled.
Example 1
Fig. 1 is the schematic cross-section of the example 1 of expression electric rotating machine related to the present invention, and Fig. 2 is the end view from the periphery of axially seeing the position of rotation test section.Electric rotating machine in this example 1 has: support and be fixed on the stator 2 on the end cap 5,6; And have be supported on the end cap 5,6 and the rotating shaft 4 that can rotate and with stator 2 coaxial rotor rotated 1.Stator 2 has stator winding 3, and rotor 1 has rotor winding 33.Belt pulley 17 is installed in the load-side of rotating shaft 4, and belt pulley 17 is not connected with there being illustrated load.On the end cap 5 of an opposite side, the power part 18 that includes switch element 9 and radiator 10 is installed with load-side.The control circuit part 13 of the switch element 9 of power controlling portion 18 is placed in the shell 15 in the outside (direction opposite with load-side) that is installed on power part 18.Position of rotation test section 11 is installed on the end of an opposite side with load-side of rotating shaft 4.At position of rotation test section 11 be configured between the power part 18 on the outer circumferential side of position of rotation test section 11, form spatial portion 19.Power part 18 is configured on the concentric circles with rotating shaft 4.If with the electric rotating machine of three-phase alternating current control, then for example shown in Figure 2, below the both sides and vertical direction of U phase, V phase, the horizontal direction of W phase configuration on circumference.In addition, for example the situation as the field-winding type electric rotating machine disposes the brush portion 8 that electric current is provided to rotor winding 33 in the upper space of the remaining vertical direction on circumference.By such configuration, can effectively make full use of the space, can realize the compact one-piece type electric rotating machine of control device.
As shown in Figure 2, position of rotation test section 11 has and rotating shaft 4 profile of circular concentric roughly.Position of rotation test section 11 and power part 18 radially between, forming with rotating shaft 4 is the drum at center or the spatial portion 19 of approximate prism shape.Shield member 12 has the profile with rotating shaft 4 circular concentric, and is formed in the spatial portion 19, thereby covers the periphery of position of rotation test section 11.
By such formation spatial portion 19, and utilize spatial portion 19 that shield member 12 is installed, can form the compact one-piece type electric rotating machine of control device.
When switch element 9 carries out ON/OFF, cause the rapid variation of electric current, thereby the abrupt change in the magnetic field of generation and position of rotation test section 11 interlinkages is disturbed to the output generation of position of rotation test section 11.Interference becomes wrong rotating position signal, sends the control circuit side to, and it is unusual to cause electric rotating machine rotation to occur.
Corresponding to producing such changes of magnetic field suddenly, in this example 1, as Fig. 1 and illustrated in fig. 2, because in the spatial portion 19 that between power part 18 and position of rotation test section 11, forms shield member 12 is set, thereby cover the periphery of position of rotation test section 11, so reduce the interference that in position of rotation test section 11, produces.
At this moment, shield member 12 has the roughly the same axial length of length L with position of rotation test section 11 shown in Figure 1, and as shown in Figure 2, around this shield member 12 that constitutes in a week of the whole periphery of position of rotation test section 11, this is effective for improving shield effectiveness.
Fig. 3 and Fig. 5 illustrate shield member for the major part amplification sectional view of power part to the effect of the influence of position of rotation test section, and Fig. 4 is the sectional view of the structure example of expression shield member.Fig. 3 is illustrated between power part 18 and the position of rotation test section 11 situation about being provided with by for example copper of good conductivity, shield member 12a that aluminium constitutes.
As shown in Figure 3, because when switch element 9 carries out ON/OFF, produced rapid changes of magnetic field, and the direction of offsetting this rapid changes of magnetic field in shield member 12a upper edge produces eddy current 20, thereby in the inboard of shield member 12a promptly with the field weakening (hereinafter referred to as shield effectiveness) of position of rotation test section 11 interlinkages, so can reduce the interference level of position of rotation test section 11.Shield member 12a is as long as be conductive material, the as far as possible little conductive material of intrinsic resistance value preferably still, for example copper or be that the shield effectiveness of material of principal component is good with copper.In addition, aluminium or be that the material of principal component not only can have shield effectiveness with aluminium, and can try hard to weight reduction.In addition, integrated if shield member 12a and end cap 5 form, then can reduce the installation component that is used on end cap 5, installing shield member 12a.
In addition, as shown in Figure 4, because the good conductor 22 that multilayer is made of conductive material and alternately wind up the shield member 12a that makes by the insulating barrier 21 that the insulating properties material constitutes and can be desirably in the screen effect that each good conductor 22 near surface utilizes eddy current to produce is so can improve the effect of shielding more.At this moment, insulating barrier 21 can be the thin slice that formed by resin, adhering agent layer etc., also can be the cover layer that forms on good conductor 22, evaporation layer etc.In addition, if having the thickness that can give full play to insulating properties, then also can use the oxide skin(coating) that forms on the surface of good conductor layers 22 such as aluminium or copper in the practicality, the material that also these can have been formed oxide skin(coating) winds up, and forms multilayer.
The situation that Fig. 5 represents is between power part 18 and position of rotation test section 11 nonmagnetic material layers 23 such as copper, aluminium to be set, and in the periphery of nonmagnetic material layer 23 the little magnetic shield member 12b of magnetic resistance such as soft magnetic ferrite to be set.Because magnetic shield member 12b compares nonmagnetic material layer 23, its magnetic resistance reduces significantly, thus the magnetic flux that produces from the power part 18 that is positioned at the electric rotating machine radial outside can not leak to position of rotation test section 11, and by magnetic shield member 12b to external radiation.Nonmagnetic material layer 23 also can be air layer (being the space), utilizes air layer, can reduce the parts number.
At this moment, the distance relation between shield member 12b and position of rotation test section 11 and the power part 18 is very important for reducing effects of jamming.Be distance (distance A among Fig. 5) between shield member 12b and the position of rotation test section 11 and the distance between shield member 12b and the power part 18 (with figure apart from B) relation, distance A will be tried one's best greatly comparatively speaking, by making distance A＞apart from B, because the changes of magnetic field during switch is easier to by shield member 12b, in addition, can not leak from shield member 12b, so shield effectiveness is good to position of rotation test section 11.
Example 2
Fig. 6 is the schematic cross-section of the example 2 of expression electric rotating machine related to the present invention.Different with above-mentioned example 1, position of rotation test section 11 and power part 18 rotating shaft 4 axially on configuration spaced apart.If make power part 18 and position of rotation test section 11 spaced apart configurations in the axial direction, then because of the field decay that produces by power part 18, so can reduce interference more.
In addition, under the situation of field-winding type AC rotary motor,, it is contacted with the collector ring 32 of rotating shaft 4, therefore can not shield member 12 be set brush 8 because the brush 8 that provides electric current to use to rotor winding 33 is provided.At this moment, as shown in Figure 6, avoid brush portion 8,,, make it around circle outer Monday of position of rotation test section 11 by like this shield member 12 being set at the axial direction opposite of the rotating shaft 4 configuration position of rotation test section 11 that staggers with load-side.
In addition because power part 18 be configured in for rotating shaft 4 axially be with brush portion 8 roughly the same position on, so also improved space availability ratio, do not maximize especially, can separate power part 18 and position of rotation test section 11 in axial distance.
Fig. 7 be expression change shape and material constitute shield member 12, and the output signal of the position of rotation test section 11 when relatively using the shield member 12 of various structures in the result of interference level.Position of rotation test section 11 in this example is that the part that the member as the gear of winding forms is set on the magnetic core that is formed by magnetic, it is a kind of resolver, this resolver is installed on the rotating shaft of rotor, owing to the rotation of rotor produces changes of magnetic field, make in the winding that is arranged on the magnetic core owing to this changes of magnetic field to produce change in voltage, detect position of rotation according to this change in voltage then.
In Fig. 7, good conductor A is a copper, and good conductor B is an aluminium, and magnetic A is a soft magnetic ferrite, and magnetic B is the soft-magnetic body that forms the iron class of insulating barrier on sheet surface.
Shape (0) is not for there being the situation of shield member.
Shape (1) is the situation that only covers the periphery of position of rotation test section 11 with 1 layer of shield member 12 that is formed by good conductor A, good conductor B, magnetic A.
Shape (2) is to spread all over power part 18, vertically the situation of 1 layer of shield member 12 that is formed by good conductor A, good conductor B is set from position of rotation test section 11.
Shape (3) is the situation that opening is set in brush portion 8 for shape (2).
Shape (4) be use shield member 12 that the thin slice by good conductor A and insulant constitutes only the periphery of position of rotation test section 11 reel 3 layers, make its situation have the situation of identical thickness with shape (1).
Shape (5) be use the shield member 12 that constitutes by magnetic B only the periphery of position of rotation test section 11 reel 10 layers, make its situation have the situation of identical thickness with shape (1).
Any situation (situation of shape (1)～shape (5)) is compared with the situation that does not have shield member (shape (0)), can both reduce interference level.Particularly, compare with shape (1), the better effects if of shape (4), the shield member 12 that will be made of the thin slice of good conductor A and insulant carries out stacked more effective for reducing interference as can be known.In addition we know, as shape (5),, interference can be reduced to below 1/10 when containing iron and magnetic material that high frequency characteristics is good carries out comparing with the situation that does not have shield member 12 when stacked.Particularly, with the amorphous alloy of iron class be the superior magnetic of the magnetic shield performance of representative in the industrial shape of laminating easily, again these chip shape are reeled and stacked, by making shield member like this with high shield effectiveness.Particularly, the resolver that detects the changes of magnetic field pass winding is very sensitive for changing the influence that produces by the external magnetic field, but shown in the result of Fig. 7 as can be known, configuration shield member 12 can reduce interference level very effectively.
Though what Fig. 7 represented is to use the shield member that is made of good conductor, the result who reaches the shield member that is made of magnetic respectively individually, good conductor and magnetic combine to use and also can bring into play same shield effectiveness.When the superior magnetic of the magnetic shield performance of making sheet, by overlapping on the sheet surface of good conductors such as copper or aluminium and coiling sheet magnetic, the shield member that does not just use the magnetic by high price to constitute can be realized good shield effectiveness.
In above-mentioned example 1 and 2, what illustrate is to produce the situation of external magnetic field by switch element 9, but by shield member 12 is set, make its cover position of rotation test section 11 around, even for example shield effectiveness also can be brought into play in the external magnetic field that produces for the outside at electric rotating machine, can reduce the interference level of position of rotation test section 11.
Industrial practicality
Such as such automotive dynamoelectric machines such as automobiles, revolve owing in the only space of engine room, install Therefore rotating motor has high requirement for miniaturization, can be effectively sharp for such automotive dynamoelectric machine With the electric rotating machine relevant with this aspect.
Claims (8)
1. electric rotating machine is characterized in that having:
Stator; Be fixed on the rotating shaft with the coaxial rotor that is rotated of described stator; Support and fixing described stator, support the end cap that described rotating shaft can rotate it simultaneously; And be configured in the described rotating shaft one distolateral position of rotation test section of going up and detecting the position of rotation of described rotor,
In this electric rotating machine, described position of rotation test section is provided with the shield member that covers its periphery and shield the external magnetic field.
2. the electric rotating machine described in claim 1 is characterized in that,
On described rotor, winding is set, the switch element portion of the electric current that provides to described winding in the control of the arranged outside of described shield member, described switch element portion produces described external magnetic field.
3. the electric rotating machine described in claim 2 is characterized in that,
Separate certain distance in the axial direction and dispose described position of rotation test section and described switch element portion.
4. the electric rotating machine described in claim 2 is characterized in that,
Between described position of rotation test section and described switch element portion, be formed centrally general cylindrical shape or roughly prismatic spatial portion in described rotating shaft being, described shield member is set in described spatial portion.
5. the electric rotating machine described in claim 1 is characterized in that,
Described shield member forms ring-type, thereby makes it cover the whole periphery of described position of rotation test section.
6. the electric rotating machine described in claim 1 is characterized in that,
Described shield member has the structure of radially stacked conductive material and insulating properties material.
7. the electric rotating machine described in claim 1 is characterized in that,
Described shield member is made of soft-magnetic body, and by interior all sides non magnetic is provided with.
8. the electric rotating machine described in claim 1 is characterized in that,
Described shield member stacked soft-magnetic body that has formed the iron class of insulating barrier on the surface of thin slice constitutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710085204XA CN101247062B (en) | 2007-02-16 | 2007-02-16 | Electric rotating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710085204XA CN101247062B (en) | 2007-02-16 | 2007-02-16 | Electric rotating machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101247062A true CN101247062A (en) | 2008-08-20 |
| CN101247062B CN101247062B (en) | 2012-04-04 |
Family
ID=39947345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710085204XA Expired - Fee Related CN101247062B (en) | 2007-02-16 | 2007-02-16 | Electric rotating machine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101247062B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103228858A (en) * | 2010-12-02 | 2013-07-31 | 西门子公司 | Apparatus for position ascertainment |
| CN104205578A (en) * | 2012-02-28 | 2014-12-10 | 大陆汽车有限公司 | Rotary electric machine |
| CN105337458A (en) * | 2014-08-06 | 2016-02-17 | 德昌电机(深圳)有限公司 | Motor and end cover assembly thereof |
| CN107276320A (en) * | 2013-01-26 | 2017-10-20 | 博泽沃尔兹堡汽车零部件有限公司 | Electric rotating machine |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2363417Y (en) * | 1999-02-09 | 2000-02-09 | 董玲生 | Slotless and brushless half-ring winding dc motor |
| CN2773985Y (en) * | 2005-01-28 | 2006-04-19 | 石忠东 | Middle water-proof brushless electric motor of electric vehicle |
| JP3868974B2 (en) * | 2005-03-30 | 2007-01-17 | 本田技研工業株式会社 | Hybrid vehicle drive device and method of manufacturing hybrid vehicle drive device |
-
2007
- 2007-02-16 CN CN200710085204XA patent/CN101247062B/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103228858A (en) * | 2010-12-02 | 2013-07-31 | 西门子公司 | Apparatus for position ascertainment |
| US9052184B2 (en) | 2010-12-02 | 2015-06-09 | Siemens Aktiengesellschaft | Apparatus for position ascertainment |
| CN103228858B (en) * | 2010-12-02 | 2015-08-19 | 西门子公司 | Position measuring device and the method for carrying out position finding |
| CN104205578A (en) * | 2012-02-28 | 2014-12-10 | 大陆汽车有限公司 | Rotary electric machine |
| CN104205578B (en) * | 2012-02-28 | 2017-02-22 | 大陆汽车有限公司 | Rotary electric machine |
| CN107276320A (en) * | 2013-01-26 | 2017-10-20 | 博泽沃尔兹堡汽车零部件有限公司 | Electric rotating machine |
| US10298088B2 (en) | 2013-01-26 | 2019-05-21 | Brose Fahrzeugteile Gmbh & Co. Kg, Wuerzburg | Rotary electric machine |
| CN107276320B (en) * | 2013-01-26 | 2019-07-23 | 博泽沃尔兹堡汽车零部件有限公司 | Rotating electric machine |
| US10476345B2 (en) | 2013-01-26 | 2019-11-12 | Brose Fahrzeugteile Gmbh & Co. Kg, Wuerzburg | Rotary electric machine |
| CN105337458A (en) * | 2014-08-06 | 2016-02-17 | 德昌电机(深圳)有限公司 | Motor and end cover assembly thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101247062B (en) | 2012-04-04 |
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Granted publication date: 20120404 Termination date: 20220216 |
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