WO2006122523A1

WO2006122523A1 - Planar motor for driving an adjuster device on a motor vehicle

Info

Publication number: WO2006122523A1
Application number: PCT/DE2006/000821
Authority: WO
Inventors: Thomas Börnchen; Uwe Sommer; Joachim Müller; Helmut Sesselmann
Original assignee: Brose Fahrzeugteile Gmbh & Co. Kg, Coburg
Priority date: 2005-05-18
Filing date: 2006-05-09
Publication date: 2006-11-23
Also published as: DE102005023493A1; DE112006001154A5

Abstract

The invention relates to a planar motor for driving an adjustment system on a motor vehicle, in particular, a window winder, comprising a disc armature, a rotor and a discoid coil system, formed by windings of electrical conductors which comprise a collector region for the commutation and an active region for cooperation with permanent magnets of the motor, whereby the electrical conductors run in two adjacent planes to form the windings. The electrical conductors forming the windings are embodied as conductor tracks (101, 102, 103, 104) embossed on a surface of a circuit board (111, 112, 113) and the collector region (14) of the coil system is formed by conductor tracks (101, 102, 103, 104) running on just one surface of at least one circuit board (111, 112, 113).

Description

Flat motor for driving an adjusting device of a motor vehicle

description

The invention relates to a flat motor for driving an adjusting device of a motor vehicle according to the preamble of patent claim 1.

Such a flat motor comprises a designated as a disc rotor disc-shaped rotor which is rotatably mounted about an axis and in the operation of the

Motor rotates about that axis of rotation. To generate the rotational movement, a flat, disc-shaped coil system is provided which has a so-called collector region for purposes of energizing the coil system by commutation

(Commutator) and also has a so-called active area, which in the operation of the motor, so when energized the coil system, associated with

Permanent magnet magnetically cooperates to produce a rotational movement of the disc-shaped rotor (disc rotor).

In this case, on the one hand, the coil system can form a component of the rotor, so that the current supply to the collector region of the coil system stator-side brushes or

Attack coals as commonly known for so-called commutator motors. The

Permanent magnets then form part of the stator and are non-rotatable this arranged. When current is applied to the coil system provided on the pancake system or the pancake-forming coil system by means of the carbon or brush provided for this purpose, a rotational movement of the pancake, including the coil system, is effected about its axis of rotation relative to the stator.

However, the generic flat motor may also be a so-called electronically commutating motor, in which the coil system forms part of the stator, ie, is not rotated together with the pancake during operation of the motor.

In the case of the flat motors mentioned at the outset, it is known to design the coil system in two layers, so that the electrical conductors forming the windings of the coils extend in two different planes. The multi-layered nature of the coil system enables the generation of correspondingly larger magnetic fields when the coil system is energized. In this case, the collector region is formed on one of the two layers, which in the operation of the motor is e.g. cooperates with associated brushes or coals.

The invention is based on the problem of further improving a flat motor of the type mentioned above.

This problem is inventively solved by the provision of a flat motor with the features of claim 1.

Thereafter, the extending in the different planes of electrical conductors are formed as conductor tracks, which are respectively pronounced on a surface of a circuit board as a carrier, ie each line layers on the respective surface of a

Forming the printed circuit board, wherein the collector region of the coil system by the on exactly one of the different (transverse to their extension plane spaced apart) surfaces printed conductors, that is formed by running in a plane tracks.

The terms conductor layer and conductor tracks are used here synonymously insofar as in one plane, ie, on one and the same surface of a carrier (a printed circuit board), arranged conductor tracks are each referred to as a conductor layer. The conductor tracks arranged in a first plane, on a surface of a carrier (ie in a first position) are accordingly referred to as a first line layer; in a second plane, on another surface of a carrier (ie, in a second layer) arranged conductor tracks are referred to as a second conductive layer; etc. The line layers are thus usually formed in each case by a plurality of individual, spaced-apart conductor track sections and not necessarily by a uniform, continuous electrically conductive layer. Rather, the term conductive layer is in each case for the entirety of the arranged on one and the same surface and distinct interconnects, each forming a conductor layer. The entirety of the conductor tracks is thus in different (at least two) layers, ie in layers, as each a line layer on different surfaces of the carrier (erotic plates) pronounced, each line layer is associated with exactly one, substantially in one plane extending surface.

The solution according to the invention is based on the realization that the construction of a multilayer coil system for a flat motor can be considerably simplified if the printed circuit board technology is used in this case. D. h., The electrical conductors which form the windings of the coil system are etched as conductor tracks on one surface of a printed circuit board in a known manner and electrically contacted by the at least one printed circuit board.

It can therefore be used for the preparation of the coil system on a proven especially in the automotive sector in mass production technology for the extensive production capacity exist. With this technology, layout changes are easy to implement, resulting in increased flexibility in the development process as well as rapid amortization of manufacturing facilities.

The insulating layers formed by the base bodies of the printed circuit boards and respectively lying between adjacent electrical conductor tracks (line layers) lead to a greater rigidity of the armature disk, which in turn has improved run-out properties and thus increased running smoothness.

Furthermore, in the event that the coil system is provided on the pancake, the external diameter of the coil system can be reduced by the omission of external spot welds (compared with the conventional technology for producing the coil system), ie a more compact design and a reduced mass moment of inertia of the system can be achieved , Advantageous embodiments of the invention will become apparent from the dependent claims of claim 1.

Further details and advantages of the invention will become apparent in the following description of exemplary embodiments with reference to the figures.

Show it:

Fig. 1a is a plan view of a spool system having a pancake of a flat motor;

Fig. 1b is a rear view of the disc rotor of Figure 1a;

2a shows a detail of the disc rotor of Figures 1a and 1b.

2b shows a further detail of the disc rotor of Figures 1a and

1 b, wherein only a part of the windings of the coil system of

Disc rotor is shown;

3a shows a cross section through the pancake of Figures 1a and 1b.

3b shows a detail of the cross section of Figure 3a;

3c shows a further enlarged detail of the cross section from FIG. 3a;

4a shows a part of the windings of the coil system of the disc rotor of the figures 1a and 1b, together with two sealing rings.

FIG. 4b shows a detail of the illustration from FIG. 4a; FIG.

5a shows a part of the windings of the coil system of the disc rotor of Figures 1a and 1b.

FIG. 5b shows a detail of the illustration from FIG. 5a; FIG.

5c is a perspective detail of the representation of Figure 5a; 6a shows a part of the windings of the coil system of the disc rotor from FIGS. 1a and 1b together with permanent magnets of an associated stator;

Fig. 6b is a detail of the representation of Figure 6a.

FIGS. 1 a to 6 b show a rotor R formed by a pancake rotor as well as magnetic elements arranged annularly behind one another in the form of permanent magnets 7 of a stator S of a flat motor.

The pancake R is rotatably mounted about a rotation axis D and has a four-layer, flat coil system, which - viewed in the radial direction from outside to inside - an outer winding pleat 11, an active region 12, an inner winding head 13 and a collector region 14 has. The active region 12 is arranged in the axial direction, ie along the axis of rotation D, opposite to the permanent magnets 7 of the stator S, so that the magnetic forces acting upon energization of the coil system 1 between the active region 12 of the coil system 1 and the permanent magnets 7 of the stator S a known manner lead to a rotational movement of the disc rotor or rotor R about the axis of rotation D.

For energizing the coil system 1 is the collector region 14, which forms the radially innermost region of the coil system 1 and which is energized by means not shown in the figures brushes or coals of a commutator.

As can be seen in particular from FIGS. 3 a to 3 c, the conductor tracks 101, 102, 103, 104, which form the windings of the coil system 1 in four planes in the axial direction, are on the surfaces of a total of three printed circuit boards 111 arranged one above the other in the axial direction , 112, 113 applied or etched, that is manufactured according to the printed circuit board technology. The printed circuit boards 111, 112, 113 thus serve as insulating carrier layers of the total of four line layers 101, 102, 103, 104 applied thereto, which form the conductor tracks of the coil system 1.

The terms conductor layer and interconnects are used in this case insofar as meaningful and related words (synonyms), as in a plane (on one and the same surface of a carrier) arranged interconnects each as a

Line layer are called. The in a first level, on a surface of a Printed circuit board arranged conductor tracks 101 are therefore referred to as a first conductor layer 101; the printed conductors 102 arranged in a second plane, on another surface of a printed circuit board, are referred to as a second conductive layer 102; etc. The line layers 101, 102, 103, 104 are therefore generally formed in each case by a plurality of individual, spaced-apart conductor track sections and not necessarily by a uniform, continuous electrically conductive layer. Rather, the term conductor layer 101, 102, 103, 104 stands for the entirety of the printed conductors 101, 102, 103, 104, which are formed in one and the same plane, ie on one and the same surface.

In this case, the two axially outer line layers 101, 104 via a plurality of radially outer lying electrical contacts 15a and the two axially inner conductor layers 102, 103 via a further plurality of radially outer lying electrical contacts 15b electrically interconnected, ie by the carrier body of the circuit boards 111, 112, 113 electrically contacted, wherein the different contacts 15a, 15b are arranged offset to one another.

Furthermore, the conductor tracks of one of the two axially outer conductor layers 101, 104 are electrically interconnected with the conductor tracks of one of the two axially inner conductor layers 102, 103, respectively, via a plurality of radially inner electrical contacts 16a, 16b, ie through the carrier bodies the printed circuit boards 111, 112, 113 electrically contacted, wherein the different contacts 16a, 16b are arranged offset to one another.

The radially outer electrical contacts 15a, 15b are respectively arranged on the outer circumference of the coil system 1 and thus of the disc rotor R and the radially inner electrical contacts 16a, 16b are provided at the transition from the inner winding region 13 to the collector region 14 of the coil system 1. In this case, the radially inner or radially outer electrical contacts 15a, 15b and 16a, 16b are each arranged offset from one another in order to ensure a reliable electrical separation of the contact points.

An axially outer line layer 104 is guided inward in the radial direction inwards than the other line layers 101, 102, 103 and forms there

Collector region 14, in which the tracks of the said axially outer Conduction layer 104 extend in the radial direction with respect to the axis of rotation D, starting from the inner winding head 13 in the radial direction inwards.

Although the further conductor layers 101, 102, 103 also extend beyond the inner winding head 13 in the radial direction inwards in the direction of the

Rotation axis D; However, they are beyond the inner winding plait 13 by first insulating portions 11 electrically insulated from the more outer portions of the corresponding line layers 101, 102, 103 and form a to the inner winding plume 13 inwardly adjacent outer sealing ring 5, which is coaxial with the axis of rotation D. and at the same time serves to stabilize the coil system.

Beyond the collector region 14 and the collector region 14 forming axially outer conductor layer 104 is electrically insulated by means of another insulation section 12 and there forms together with the likewise electrically insulated portions of the three other conductor layers an inner sealing ring 6, which also extends coaxially to the axis of rotation D and also contributes to the stabilization of the coil system. The inner sealing ring 6 simultaneously closes off the coil system 1 in the radial direction inwards.

Radially inwardly adjoins the coil system 1 continues to a hub 3, which on the one hand forms a bearing (bearing collar 31) for a driven pinion 4 and on the other hand has an axially adjacent to the bearing radially outwardly adjoining support portion 32 which defines a receiving area 34 , which surrounds the coil system 1 on the inner sealing ring 6.

On the side facing away from the collector region 14 in the axial direction of the coil system, the support portion 32 of the hub 3 has an extension 33 which extends to the inner winding portion 13 of the coil system 1 and thereby together with the support portion 32 of the hub 3 for stabilizing the disc rotor. 1 contributes.

The hub 3 is preferably produced by injection molding, in such a way that the finished, formed on the support bodies of the printed circuit boards 111, 112, 113 coil system is inserted into an injection molding tool in this in its central region with the hub 3 is encapsulated.

On the hollow cylindrical bearing collar 31 of the hub 3 as the output element 4, a gear or pinion is mounted, which with a bearing portion 40, the bearing collar 31 of Passes through hub 3 and which is provided at its axially projecting from the bearing collar of the hub 3 end portion with an external toothing 45. This pinion can either be pressed into the bearing collar 31 of the hub 3 or alternatively in the injection molding tool, in which the hub 3 is molded onto the coil system 1, are encapsulated by the bearing collar 31 of the hub 3.

As an alternative to a molded plastic, on the coil system 1 molded hub 3 can also be a separate, to be fastened to the coil system hub, z. B. of a light metal (aluminum) can be used.

On the outer circumference of the coil system 1, the line layers 101, 102, 103, 104 and the associated electrical contacts 15a, 15b advantageously form an optically scannable control contour, which allows a position and speed measurement by optical scanning.

The invention has been explained in the present case with reference to an exemplary embodiment in which the coil system is formed as a four-layer system by a total of four conductor layers, which are each arranged on a surface of a printed circuit board carrier. However, the winding system may also have more than four layers, in particular six layers, or alternatively less than four layers, e.g. two layers.

In this case, the conductor layer forming the collector region can be made of a different material than the remaining conductor layers in order to optimize the commutation system with regard to the commutation properties. Further, the conductor layer forming the collector region may have a different thickness from the other conductor layers in order to optimize the system with regard to heat conduction and stability.

Claims

claims

1. Flat motor for driving an adjustment system of a motor vehicle, in particular a window, with

- A rotatably mounted about a rotation axis disc rotor as a rotor and

a disc-like coil system formed by windings of electrical

Conductor having a collector region serving for the energization and an active region interacting with magnetic elements of the motor,

wherein the electrical conductors for forming the windings extend in at least two adjacent planes,

characterized,

in that the electrical conductors forming the windings are designed as conductor tracks (101, 102, 103, 104) which are disposed on a respective surface of at least one of them

Circuit board (111, 112, 113) run, and that the collector region (14) of the coil system by on one of the surfaces extending conductor tracks (101, 102, 103, 104) is formed.

2. Flat motor according to claim 1, characterized in that the coil system forms a part of the disc rotor (R) and is rotatable together with this as a rotor.

3. Flat motor according to claim 1, characterized in that the dutch system forms part of a stator (S) of the flat motor, with respect to which the pancake rotor (R) is rotatable.

4. Flat motor according to one of the preceding claims, characterized in that the conductor tracks (101, 102, 203, 104) in layers, as each a line layer (101, 102, 103, 104) on each surface of a printed circuit board (111, 112, 112) extend.

5. Flat motor according to one of the preceding claims, characterized in that the collector region (14) forming conductor tracks (104) in the radial direction with respect to the axis of rotation (D) of the motor via extending on other surfaces, further conductor tracks (101, 102, 103) protrude and form with their over the other conductor tracks (101, 102, 103) projecting portion of the collector region (14).

6. Flat motor according to claim 5, characterized in that the collector region (14) forming conductor tracks (104) in the collector region (14) are radially extending on a surface.

7. Flat motor according to one of the preceding claims, characterized in that the collector region (14) forming conductor tracks (104) made of a different material than the other conductor tracks (101, 102, 103).

8. Flat motor according to one of the preceding claims, characterized in that the collector region (14) forming conductor tracks (104) have a different thickness than the further conductor tracks (101, 102, 103).

9. Flat motor according to one of the preceding claims, characterized in that the coil system is formed by a plurality of double-layered conductor tracks (101, 102, 103, 104).

10. A flat motor according to claim 4 or one of claims 5 to 9, as far as referred to claim 4, characterized in that the collector region (14) by an axially outer conductor track (104) is formed.

11. Flat motor according to one of the preceding claims, characterized in that the formed of the conductor tracks (101, 102, 103, 104) coils on the surface of a printed circuit board (111, 112, 113) are pronounced.

12. Flat motor according to claim 4 or one of claims 5 to 11, as far as referred to claim 4, characterized in that the line layers (101, 102, 103, 104) at a plurality of contact points (15a, 15b, 16a, 16b) in pairs electrically contacted with each other.

13. A flat motor according to claim 12, characterized in that for forming windings of the coil system for the pairwise contacting of conductor layers (101, 102, 103, 104) provided electrical contact points (15a, 15b, 16a, 16b) at least partially on the outer periphery of Coil system are provided.

14. Flat motor according to claim 12 or 13, characterized in that the paired electrical contacting of different conductor layers provided electrical contact points (15a, 15b, 16a, 16b) at least partially viewed in the radial direction between the active region (12) and the collector region (14) of the coil system are provided.

15. Flat motor according to one of claims 12 to 14, characterized in that electrical contact points (15a, 15b, 16a, 16b), with which different conductor layer pairs are electrically contacted with each other, are arranged offset from one another.

16. A flat motor according to claim 15, characterized in that the electrical contact points (15a, 15b, 16a, 16b) are arranged radially and / or offset in the circumferential direction to each other.

17. A flat motor according to claim 2 or one of claims 3 to 16, as far as dependent on claim 2, characterized in that the coil system has a mark forming rule contour, which is optically scanned.

18. A flat motor according to claim 4 and 17, characterized in that the

Markings by a segmentation on the outer circumference of the coil system or by between the interconnects (101, 102, 103, 104) at least one

Line layer provided gaps, z. B. in the form of holes are formed.

19. A flat motor according to one of the preceding claims, characterized in that annular, by insulation not electrically effective conduction layer regions (5, 6) are provided on the radially inner region of the coil system to increase the rigidity of the coil system.

20. A flat motor according to claim 2 and 18, characterized in that the electrically non-effective conductive layer regions (5, 6) for receiving and centering a disc rotor (R) provided hub (3) are used.

21. Flat motor according to claim 19, characterized in that the electrically non-effective conductor layer regions (5, 6) serve to seal the hub (3).

22. Flat motor according to claim 19 or 20, characterized in that the hub (3) consists of plastic and molded onto the coil system.

23. A flat motor according to claim 21, characterized in that the hub (3) is formed thereby on the coil system that the coil system has been inserted into an injection mold and in this the hub (3) has been injection-molded onto the coil system.

24. Flat motor according to one of claims 20 to 23, characterized in that the hub (3) at least partially covers and supports the radial inner region of the coil system on the collector region (14) side facing away.

25. Flat motor according to one of the preceding claims, characterized in that the coil system further electrical or electronic components are arranged.

26. Flat motor according to claim 25, characterized in that the further electronic components comprise means for interference suppression and / or control electronics.