CN101247062B - Electric rotating machine - Google Patents
Electric rotating machine Download PDFInfo
- Publication number
- CN101247062B CN101247062B CN200710085204XA CN200710085204A CN101247062B CN 101247062 B CN101247062 B CN 101247062B CN 200710085204X A CN200710085204X A CN 200710085204XA CN 200710085204 A CN200710085204 A CN 200710085204A CN 101247062 B CN101247062 B CN 101247062B
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- shield member
- test section
- rotating machine
- rotation test
- electric rotating
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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 the 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 through 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 the rotational position detector of inverter circuit part and rotor that comprises switch element is near configuration; So interference meeting that produces owing to above-mentioned magnetic field abrupt change and the output of rotational position detector stack produce the problem for the erroneous detection 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 receive the influence of external magnetic field, thereby prevents the misoperation of rotational position detector.
Summary of the invention
The electric rotating machine relevant with 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 the electric rotating machine relevant with 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 that is distributed in the position of rotation test section obviously reduce, can the interference level in the output that be superimposed upon the position of rotation test section 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 the expression electric rotating machine relevant with 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 range upon range of 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 the expression electric rotating machine relevant with 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
According to accompanying drawing example of the present invention is described below.The example of explanation is an example with the structure that control device is installed in the control device integrated rotating electric machine on the electric rotating machine below, 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 the expression electric rotating machine relevant with 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.Through 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.
Through 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 explain 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 the 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, thus in the inboard of shield member 12a promptly with the field weakening of position of rotation test section 11 interlinkages (below be called shield effectiveness), 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, if shield member 12a and end cap 5 being integrally formed 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 up of conductive material and can be desirably in the screen effect that each good conductor 22 near surface utilizes eddy current to produce by the insulating barrier 21 that the insulating properties material the constitutes shield member 12a that gets up to process that alternately reels 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 on good conductor 22, forms, vapor deposition layer etc.In addition,, then also can use the oxide skin(coating) that on the surface of good conductor layers 22 such as aluminium or copper, forms in the practicality if having the thickness that can give full play to insulating properties, also can with these material webs that formed oxide skin(coating) around, form multilayer.
The situation that Fig. 5 representes 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 that is positioned at the electric rotating machine radial outside 18 can not leak to position of rotation test section 11, and through 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 between shield member 12b and the position of rotation test section 11 distance (distance A among Fig. 5) 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; Distance A＞apart from B, the changes of magnetic field during owing to switch is easier to through shield member 12b, in addition through making; 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 the expression electric rotating machine relevant with 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 owing to be provided with the brush 8 that provides electric current to use to rotor winding 33.At this moment, as shown in Figure 6, avoid brush portion 8, at the axial direction opposite of the rotating shaft 4 configuration position of rotation test section 11 that staggers,, make it around circle outer Monday of position of rotation test section 11 through like this shield member 12 being set 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 is the result that expression changes the interference level in the output signal that shape and material constitute shield member 12, the position of rotation test section 11 when also relatively using the shield member 12 of various structures.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 on sheet surface, forms the iron class of insulating barrier.
Shape (0) is not for there being the situation of shield member.
Shape (1) is to come only to cover the situation of 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), it is range upon range of more effective for reducing interference to know that the shield member 12 that will be made up of the thin slice of good conductor A and insulant carries out.Can know in addition,,, can interference 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 range upon range of as shape (5).Particularly, be the superior magnetic of magnetic shield performance of the representative shape of in industry, laminating easily with the amorphous alloy of iron class, again these chip shape are reeled and range upon range of, through processing shield member like this with high shield effectiveness.Particularly, the resolver that detects the changes of magnetic field of passing winding is very sensitive for changing the influence that produces by the external magnetic field, but can know that shown in the result of Fig. 7 configuration shield member 12 can reduce interference level very effectively.
Though what Fig. 7 represented is to use the shield member that is made up of good conductor, the result who reaches the shield member that is made up 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 processing sheet, through 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 explain is the situation by switch element 9 generation external magnetic fields; But through shield member 12 is set; Make its cover position of rotation test section 11 around, even shield effectiveness also can be brought into play in the external magnetic field that for example produces for the outside at electric rotating machine, can reduce the interference level of position of rotation test section 11.
Practicality in the industry
Such automotive dynamoelectric machine such as automobile for example since in the only space of engine room mounting rotary electric machine, therefore high requirement is arranged for miniaturization, can effectively utilize the electric rotating machine relevant for the automotive dynamoelectric machine of that kind with this aspect.
Claims (7)
1. electric rotating machine is characterized in that having:
Stator;
Be fixed on the rotating shaft with the coaxial rotor that is rotated of said stator;
Be installed in the stator winding on the said stator;
Be installed in said epitrochanterian rotor winding;
Support and fixing said stator, support the end cap that said rotating shaft can rotate it simultaneously;
Be configured in the said rotating shaft one distolateral position of rotation test section of going up and detecting the position of rotation of said rotor;
Be installed on the said end cap and cover the periphery of said position of rotation test section, shield the shield member of external magnetic field simultaneously; And
The electric current that control provides to said stator winding or said rotor winding also is arranged on the outside of said shield member, is installed in switch element portion on the said end cap simultaneously,
Said switch element portion produces said external magnetic field.
2. the electric rotating machine described in claim 1 is characterized in that,
Separate certain distance in the axial direction and dispose said position of rotation test section and said switch element portion.
3. the electric rotating machine described in claim 1 is characterized in that,
Between said position of rotation test section and said switch element portion, be formed centrally general cylindrical shape or roughly prismatic spatial portion in said rotating shaft being, said shield member is set in said spatial portion.
4. the electric rotating machine described in claim 1 is characterized in that,
Said shield member forms ring-type, thereby makes it cover the whole periphery of said position of rotation test section.
5. the electric rotating machine described in claim 1 is characterized in that,
Said shield member has the structure of radially range upon range of conductive material and insulating properties material.
6. the electric rotating machine described in claim 1 is characterized in that,
Said shield member is made up of soft-magnetic body, and through interior all sides non magnetic is provided with.
7. the electric rotating machine described in claim 1 is characterized in that,
Said shield member constitutes at the soft-magnetic body that the surperficial laminated of thin slice has formed the iron class of insulating barrier.
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 CN101247062A (en) | 2008-08-20 |
| CN101247062B true 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) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010062316A1 (en) | 2010-12-02 | 2012-06-06 | Siemens Aktiengesellschaft | Device for determining position |
| DE202012002027U1 (en) * | 2012-02-28 | 2012-03-12 | Continental Automotive Gmbh | Rotating electrical machine |
| DE102013001314A1 (en) | 2013-01-26 | 2014-07-31 | Brose Fahrzeugteile GmbH & Co. Kommanditgesellschaft, Würzburg | Rotating electrical machine |
| CN105337458B (en) * | 2014-08-06 | 2019-09-17 | 德昌电机(深圳)有限公司 | Motor and its end-cap assembly |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2363417Y (en) * | 1999-02-09 | 2000-02-09 | 董玲生 | Slotless brushless semi-ring winding dc motor |
| CN2773985Y (en) * | 2005-01-28 | 2006-04-19 | 石忠东 | Middle water-proof brushless electric motor of electric vehicle |
| CN1841871A (en) * | 2005-03-30 | 2006-10-04 | 本田技研工业株式会社 | Hybrid vehicle driving system and method for fabricating same |
-
2007
- 2007-02-16 CN CN200710085204XA patent/CN101247062B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2363417Y (en) * | 1999-02-09 | 2000-02-09 | 董玲生 | Slotless brushless semi-ring winding dc motor |
| CN2773985Y (en) * | 2005-01-28 | 2006-04-19 | 石忠东 | Middle water-proof brushless electric motor of electric vehicle |
| CN1841871A (en) * | 2005-03-30 | 2006-10-04 | 本田技研工业株式会社 | Hybrid vehicle driving system and method for fabricating same |
Non-Patent Citations (1)
| Title |
|---|
| JP特开2001-119914A 2001.04.27 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101247062A (en) | 2008-08-20 |
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