DE102009020481A1 - reluctance motor - Google Patents

Abstract

The invention relates to a reluctance motor (1) having a rotor (3) and a stator (5), wherein on the stator (5) individual, free-standing stator poles (6) are formed, which are surrounded by windings (7), wherein further winding body (9) are arranged between the stator (5) and the windings (7) and / or the stator (5) is accommodated in a stator housing (10) encompassing the outside. In order to further improve a reluctance motor of the type in question with regard to the resonance effects in the speed range of the reluctance motor, it is proposed that the winding body (9) and / or the stator housing (10) extend in sections at a distance from the stator (5).

Description

The The invention relates to a reluctance motor with a rotor and a Stator, wherein on the stator individual, free-standing stator poles are formed, which are surrounded by windings, being further between the stator and the windings winding body are arranged and / or the stator in a stator housing surrounding outside is included.

Reluctance motors of the type in question are known. For example, on the DE 103 37 916 A1 directed. There, a reluctance motor is shown and described, which has to reduce the noise emission during operation of the motor, a winding body ausformende stator cover, which serves the free-standing stator poles as a support for the proposed stator winding. In addition, it is known to incorporate reluctance motors of the type in question in a stator housing, in particular consisting of a surrounding the stator wall and each end of the stator provided bridges for the stored recording of the rotor axis.

conditioned high electromagnetic forces cause vibrations stimulated in the stator. In the stator and in the winding arise by the energization of the motor micro-movements, for example Electrostriction in the iron, forces between the copper wires the winding and electromagnetic interactions between rotor and stator. These force effects are dependent on the frequency the speed of the motor. Depending on the frequency resonances can be stimulated in the system. So can be correspondingly at high revving Motors resonance effects occur.

in the With regard to the prior art described above, a technical problem of the invention seen in a reluctance of the in question type with respect to the above-described resonance effects in the speed range of the reluctance motor to further improve.

These The problem is first and foremost through the The subject matter of claim 1 is solved, with a focus on it is that the winding body and / or the stator housing sections running with distance to the stator. Follow this Design will be movements due to resonant vibrations a part, such as the winding body and / or the stator housing, which movements would lead to a collision with the stator, prevented and the otherwise associated unpleasant sounds eliminated. By the sectionwise spacing of the winding body and / or the stator housing to the stator is a resonance reached outside the speed range. A full-surface Touching the winding body and / or the stator housing on the stator is avoided.

Further Features of the invention are below, also in the figure description, often in their preferred assignment to the subject of the claim 1 or explained features of further claims. But they can also be in an assignment to only individual Features of claim 1 or the respective further claim or each independently.

So is provided in a further preferred embodiment that the Winding body and / or associated with the stator housing the stator for sectional spacing projections having. In alternative or combinative embodiment has the stator associated with the winding body and / or the Stator housing formed on the stator protrusions on. The with respect to the stator passing through the rotor axis outwardly or inwardly facing projections form mutually spaced support areas. In this context it is preferred that no areal Appendix is provided, but rather preferably a point or linear arrangement of the winding body and / or of the stator housing on the stator.

The Projections extend in a further preferred embodiment in the axial direction of the rotor, that is, parallel to the space Rotor axis or at least oriented on such a space parallel, that is an acute angle of 0.5 ° to 30 ° if necessary engaging. So it is further provided in this context that the projections are formed as ribs, so that accordingly a particular line-shaped system is reached. Ribs run in the form of ridge-like elevations the adjacent wall region of the winding body and / or the stator housing or the stator in the arrangement of the projections on the stator.

A combination of resonance effects in the speed range of the reluctance motor is further achieved by a development in which the spaced area, which is in direct opposition to the stator, summarized in cross section with respect to a circumferential line 20% to 98%. Accordingly, a support to the opposite region, corresponding to a support of the winding body and / or the stator housing on the stator in cross-section relative to a circumferential line in the support region about 2% to 80%, preferably 2% to 10%, which in an exemplary extent of The stator surrounding section of the stator housing of 250 mm a summarized Anlagebe ranges from about 10 mm to 15 mm, which investment area is further distributed by the preferred provided rib-like projections evenly or alternatively also irregularly over the circumference. Here, the respective support surface is considered to be small in the circumferential direction such that a point or line-like system is reached. Thus, projections are formed on the winding body and / or stator housing whose respective circumferential extent is equal to or smaller than the wall thickness of the winding body and / or the Statorge housing, this with a preferred wall thickness of the winding body and / or the stator housing from 1 mm to 5 mm, resulting in a circumferential extension of each projection of 5 mm or less. Thus, it is further provided in this connection that the circumferential extent of the projections corresponds to one tenth to one half of the wall thickness of the winding body and / or the stator housing, so that further at a preferred wall thickness of 1 mm to 5 mm, a circumferential extension of a projection of 0, 1 mm to 2.5 mm, this further in particular in connection with a formation of projections on the winding body and with respect to a winding body wall thickness.

In alternative or combinative embodiment are on the winding body and / or stator housing projections formed, whose circumferential extent is equal to or greater than the wall thickness of the winding body and / or the Stator housing is, so with respect to the aforementioned preferred wall thickness is a Circumferential extension of each projection of 5 mm or more results. It is preferred in this regard further that the circumferential extent the protrusions 1.5 to 10 times the wall thickness of the winding body and / or the stator housing equivalent. This results in a preferred circumferential extent of each projection of 1.5 mm to 50 mm in one as mentioned above preferred wall thickness. Such trained projections are particularly associated with the stator housing, wherein the Peripheral extension in relation to the housing wall thickness stands.

The Stator housing is in a favorable embodiment as Sheet metal part formed, as sheet metal stamping or sheet metal stamping, further wherein the stator housing is divided into two and wherein the spacing in any case at the one with an upper bridge provided housing part is formed. In more preferred Design is the spacing also at the one with a lower Provided bridge provided housing part, which Bridges for fixing the stator housing to the Sta tor, for example, are clamped. Accordingly, this is Clamp fixing the stator housing bridge to the Stator favorable in terms of the aforementioned resonance effects configured by sectionwise spacing of the stator comprising Housing section, more preferably provided for this purpose Projections for spacing on the stator itself formed are. In a preferred embodiment of the stator as a stator, consisting of contoured, stacked Statorblechen, these are the stator housing spaced Projections in the course of the production of the stator by Punching formed along the outer contour.

Of the Winding body is in a preferred embodiment as electrical insulating plastic injection molded part formed. This one is wearing the stator windings and acts as an electrical insulator to the stator.

The Distances of the non-touching in immediate Opposing areas continue to be so Great that it is also in extreme conditions can not give any touch to these surfaces, so even in situations in which the between the projections bending freely strained surfaces due to vibrations, continue with respect to the rotor axis of rotation in approximately radial direction bend. Next corresponds in this context, the circumferential length between two investment areas one to fifty times the circumferential extent of a projection, so that further in a preferred Peripheral extension of a projection of about 1 mm to 5 mm itself a support-free circumferential length between two Investment ranges, for example, 1 mm to 50 mm results.

The respectively given numerical bandwidths close - if not already exemplary are specified - all intermediate values on and although in particular in tenth steps from the lower and / or upper limit limited to the other border. "And" stands in this case, that both borders by one or more Tenth moved to the border, that is limited become.

below the invention with reference to the accompanying drawings, which only one embodiment represents, closer explained. It shows:

1 a perspective view of a reluctance motor with a stator and designed as a bridge, fixed to the stator stator housing part;

2 the side view to this;

3 the section according to the line III-III in 2 ;

4 the enlargement of the area IV in 3 ;

5 the enlargement of the area V in 3 ,

Shown and described is first with reference to 1 a reluctance motor 1 in the form of a four-two reluctance motor. The corresponding two-phase motor has a rotationally fixed on a rotor shaft 2 sitting rotor 3 on. This has two diametrically opposed rotor poles 4 , The rotor 3 rotates during operation of the reluctance motor 1 one through the rotor shaft 2 given geometric rotor axis x.

The the rotor 3 surrounding stator 5 has four in the direction of rotation of the rotor 3 in each case an angle of 90 ° to each other engaging stator poles 6 on. These each carry coils forming windings 7 ,

For electrical insulation of the windings 7 against the stator 5 are the stator poles 6 as well as between the stator poles 6 circumferentially extending stator walls 8th from a designed as a plastic injection molded part winding body 9 covered. This is in cross section as shown in FIG 3 designed like a shell, to the lining of the windings flanking stator.

The stator 5 is further included in a this outside embracing stator housing 10 of which in the drawings only one, one end face of the stator 5 Covering bridge 11 is reproduced. The bridge 11 opposite side of the stator 5 is, although not shown, overlapped by a similarly constructed another bridge.

The bridge 11 , as well as the further provided bridge serve to support the rotor shaft 2 What, in the bridge 11 a central receiving opening 12 is provided. In this, a ball bearing or the like can be used to support a rotor shaft section.

The bridge 11 further includes a circumferential with respect to the rotor axis x collar 13 on. This surrounds the associated end portion of the stator 5 under partial installation on its outer surfaces.

The stator 5 is formed from a package of identically designed stator laminations 14 , These are formed by stamping such that in the assembled stator 5 wall outside four in plan view at an angle of 90 ° to each other enclosing Statoraußenflächen 15 result, the radially inwardly facing stator poles 6 assigned. The to the stator outer surfaces 15 in the circumferential direction of the stator 5 subsequent corner regions are rounded, for example with a radius oriented at the rotor axis x.

As in particular from the enlarged view in 4 to recognize, are the stator outer surfaces 15 with reference to a cross section through the stator 5 provided with projections and recesses, so that an interrupted support surface for the bridge-side collar 13 results. The projections 16 in this case have a with respect to the rotor axis x radial height a, which is about 0.5 times the material thickness of the formed as a sheet metal part collar 13 the bridge 11 equivalent. The transverse thereto, that is, in the circumferential direction considered width b of such a projection 16 is about 10 times the height a.

Per stator outer surface 15 are three circumferentially equally spaced projections 16 provided, wherein the free distance between two adjacent projections 16 approximately corresponds to the projection width b.

The circumferential extent of each projection 16 , resulting from the addition of the projection width b and the two-fold value of the height a, corresponds in the illustrated embodiment, about ten times the wall thickness of the collar 13 , Every lead 16 extends in space parallel alignment with the rotor axis x over the entire stator outer surface 15 that is, starting from the bridge 11 to the opposite, the further bridge receiving end.

According to the above-described formation of the projections 16 the collar runs 13 of the stator housing 10 in sections with distance to the stator 5 , which distance is defined by the projection height a. This spacing is in the rounded corners of the stator 5 maintained, so that the collar portion associated with the rounded portion freely under spacing from the stator 5 extends.

According to the above-described embodiment, only a linear contact of the stator housing 10 especially his collar 13 and stator 5 given. The distances of the projections 16 to each other are chosen so that no resonances in the speed range of the engine 1 be stimulated. In addition, the distances of the non-touching, in the immediate opposing surfaces according to the projection height a are chosen so large that even with a deflection caused by vibrations between the projections 16 free stretched sections of the collar 13 no contact with the stator 5 this results in a preferred arrangement of the bridge 11 on the stator 5 in a press fit.

Also the winding body 9 does not lie completely on the facing wall of the stator 5 or the stator poles 6 at. Rather, the winding body is supported by projections arranged on the outside of the wall and parallel to the rotor axis x 17 on the associated stator from which projections 17 are formed as ribs. These are of uniform material and integral with the winding body 9 molded and act in the manner of crush ribs, which form a linear arrangement of the winding body 9 offer at the associated stator wall.

As from the enlarged view in 5 to recognize, are the rib-like projections 17 designed in cross-section circular section, with a in the root region of the projections 17 on the winding body wall 18 measured in the circumferential direction width c, which is about one-third of the thickness of the wall 18 equivalent. The height d considered transversely to the projection height c further corresponds to approximately half the width dimension c of the projection 17 , resulting in a circumferential extension of a projection considered in cross-section 17 which gives about half the wall thickness of the wall 18 equivalent.

The projections 17 are in circumferential extension of the winding body wall 18 spaced from each other, wherein in the illustrated embodiment, this distance between two adjacent projections 17 about ten times the circumferential extent of a projection 17 equivalent.

As can be further seen from the illustrations, the winding body is supported 9 in the area of a stator pool 6 associated surface over two mutually circumferentially spaced projections 17 from, while in the circumferential direction for support on the stator 8th three mutually spaced projections 17 are provided. This results in a circumferentially considered, the stator 5 spaced area, which is summarized in cross-section about 85% relative to a circumferential line, so that accordingly a support of the winding body 9 over about 15% of its circumferential extent on the stator 5 given is.

This is also in terms of the winding body 9 a linear attachment to the stator 5 given, wherein the areas or distances between the rib-like projections 17 are dimensioned so that a resonance outside the speed range is achieved.

The above reluctance motor 1 is characterized by a high natural resonance. Unwanted resonance effects in the engine speed range are avoided, as well as other mechanical noise such as rattling. The motor is due to the point or linear arrangement of the stator housing 10 or the bridge 11 and the winding body 9 on the stator 5 and the resulting reduced vibration level noise minimized.

All disclosed features are essential to the invention (in itself). In the disclosure of the application is hereby also the disclosure content the associated / attached priority documents (Copy of the advance notice) fully included, too for the purpose, features of these documents in claims present Registration with.

1

reluctance motor

2

rotor shaft

3

rotor

4

rotor poles

5

stator

6

stator

7

windings

8th

stator wall

9

winding body

10

stator

11

bridge

12

receiving opening

13

collar

14

stator laminations

15

Statoraußenflächen

16

head Start

17

head Start

18

Winding body wall

a

height

b

width

c

width

d

height

x

rotor axis

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• DE 10337916 A1 [0002]

Claims (14)

Reluctance motor ( 1 ) with a rotor ( 3 ) and a stator ( 5 ), wherein on the stator ( 5 ) individual, free-standing stator poles ( 6 ) formed by windings ( 7 ), where further between the stator ( 5 ) and the windings ( 7 ) Winding body ( 9 ) are arranged and / or the stator ( 5 ) in a stator housing enclosing outside ( 10 ), characterized in that the winding body ( 9 ) and / or the stator housing ( 10 ) in sections at a distance from the stator ( 5 ) runs. Reluctance motor according to Claim 1 or in particular according thereto, characterized in that the winding body ( 9 ) and / or the stator housing ( 10 ) associated with the stator ( 5 ) for sectional spacing projections ( 16 . 17 ) having. Reluctance motor according to one or more of the preceding claims or in particular according thereto, characterized in that the stator ( 5 ) associated with the winding body ( 9 ) and / or the stator housing ( 10 ) on the stator ( 5 ) shaped projections ( 16 . 17 ) having. Reluctance motor according to one or more of the preceding claims or in particular according thereto, characterized in that the projections ( 16 . 17 ) in the axial direction of the rotor ( 3 ). Reluctance motor according to one or more of the preceding claims or in particular according thereto, characterized in that the projections ( 16 . 17 ) are formed as ribs. Reluctance motor according to one or more of the preceding claims or in particular according thereto, characterized in that the spaced-apart region which is in direct opposition to the stator ( 5 ), summarized in cross-section with respect to a circumferential line is 20% to 98%. Reluctance motor according to one or more of the preceding claims or in particular according thereto, characterized in that on the winding body ( 9 ) and / or stator housing ( 10 ) Projections ( 16 . 17 ) whose circumferential extent is equal to or smaller than the wall thickness of the winding body ( 9 ) and / or the stator housing ( 10 ). Reluctance motor according to one or more of the preceding claims or in particular according thereto, characterized in that the circumferential extent of the projections ( 16 . 17 ) one tenth to one half of the wall thickness of the winding body ( 9 ) and / or the stator housing ( 10 ) corresponds. Reluctance motor according to one or more of the preceding claims or in particular according thereto, characterized in that on the winding body ( 9 ) and / or stator housing ( 10 ) Projections ( 16 . 17 ) whose circumferential extent is equal to or greater than the wall thickness of the winding body ( 9 ) and / or the stator housing ( 10 ). Reluctance motor according to one or more of the preceding claims or in particular according thereto, characterized in that the circumferential extent of the projections ( 16 . 17 ) 1.5 to 10 times the wall thickness of the winding body ( 9 ) and / or the stator housing ( 10 ) corresponds. Reluctance motor according to one or more of the preceding claims or in particular according thereto, characterized in that the stator housing ( 10 ) is a sheet metal part. Reluctance motor according to one or more of the preceding claims or in particular according thereto, characterized in that the stator housing ( 10 ) is divided into two parts and that the spacing is in any case at the upper bridge ( 11 ) provided housing part is formed. Reluctance motor according to one or more of the preceding claims or in particular according thereto, characterized in that the winding body ( 9 ) is designed as a plastic injection molded part. Reluctance motor according to one or more of the preceding claims or in particular according thereto, characterized in that the circumferential length between two contact regions is one to fifty times the circumferential extent of a projection ( 16 . 17 ) corresponds.