DE102022001009B3 - Drive comprising an electric motor, a housing part and an electronic module - Google Patents

Abstract

Drive, having an electric motor, a housing part and an electronics module, the electric motor being inserted into a receiving area of the housing part, a mating connector part of the electronics module being electrically plug-connected to a first connector part or to a second connector part, the first connector part and the second connector part being on a first printed circuit board, which is connected to the housing part, with the first and second connector parts being arranged on the first printed circuit board in such a way that the first connector part merges into the second connector part with an imaginary rotation of 180°, the rotation of one axis of rotation is executed, which is aligned perpendicular to the insertion direction of the electric motor into the housing part and which is aligned parallel to the normal direction of a plane receiving the first printed circuit board and/or the flat side of the power module facing the electronic module and/or which is aligned perpendicular to the axis of rotation of the rotor shaft is.

Description

The invention relates to a drive having an electric motor, a housing part and an electronic module.

It is generally known that a drive has an electric motor.

From the SEW-EURODRIVE company publication “Operating Instructions for AC Motors; Bruchsal, 2021” an electric motor is known.

From the SEW-EURODRIVE company brochure “MOVIMOT advanced geared motors catalogue; Bruchsal, 2021” a converter motor is known.

From the DE 10 2004 063 920 A1 a series of electric motors is known.

From the DE 10 2004 033 745 A1 an electric motor is known.

From the DE 10 2007 034 915 A1 a motor connection box and a converter motor are known.

From the DE 100 36 234 A1 a frequency converter with a housing consisting of an upper part and a lower part is known.

From the DE 10 2013 205 897 A1 a drive system is known.

From the DE 10 2015 219 951 A1 an electric motor is known.

From the DE 10 2018 108 716 A1 an electric motor with an integrated encoder is known.

The invention is therefore based on the object of further developing a device and a method, in which case the drive should be compact and efficient and as simple and inexpensive as possible to produce.

According to the invention, the object is achieved with the drive according to the features specified in claim 1.

Important features of the invention in the drive, having an electric motor, a housing part and an electronic module, are that the electric motor is plugged into a receiving area of the housing part,

in particular wherein the receiving area has a cylindrical inner wall section. The advantage here is that a plug-in interface is created between the electric motor and the rest of the drive, which enables the exchange of a first electric motor, which for example has a first maximum electrical power, with another electric motor, which for example has a greater axial length and thus a higher maximum power attainable.

The electronic module, which is also connected in a pluggable manner, allows a large variety of drives to be provided with a small number of different electric motors and electronic modules. The plug-in interfaces can be used quickly and therefore cost-effectively.

In addition, recycling can be carried out quickly and easily, since the different modules can be separated quickly and easily.

Efficient cooling is achieved by inserting the electric motor into the receiving area, which has ribs on the outside. In addition, power electronics or its power semiconductor switch can be pressed against the housing part and can therefore be efficiently cooled.

In this way, the drive can be implemented in a compact manner, i.e. with high performance per unit volume.

According to the invention, a mating connector part of the electronics module is electrically plug-connected to a first connector part or to a second connector part,
wherein the first connector part and the second connector part are assembled on a first printed circuit board, which is connected to the housing part,
the first and the second connector part being arranged on the first printed circuit board in such a way that the first connector part merges into the second connector part during an imaginary rotation of 180°, i.e. in particular it is arranged and designed identically to the second connector part,
wherein the rotation is carried out about an axis of rotation, which is aligned perpendicularly to the insertion direction of the electric motor into the housing part and which is aligned parallel to the normal direction of a plane receiving the first printed circuit board and/or the plane side of the power module facing the electronics module and/or which is perpendicular aligned with the axis of rotation of the rotor shaft. The advantage here is that the electronics module can be placed in two different orientations and the cable outlets can therefore be aligned in different directions.

In an advantageous embodiment, on the outer surface of the receiving area of the housing part on the housing part, in particular on the receiving area, are formed with annular ribs projecting radially outwards and running continuously in the circumferential direction, which are spaced apart from one another in the axial direction, in particular spaced evenly.

In particular, the receiving area is designed as an internal cylinder. The advantage here is that the electric motor can be in contact with the receiving area as closely as possible, and thus a low heat transfer resistance. In addition, the annular ribs, which are concentric to one another, increase the surface area and thereby also reduce the heat transfer resistance. In the axial direction, ie in the direction of the axis of rotation of the rotor shaft of the electric motor and/or in the direction of the plug connection direction of the electric motor, the ribs are spaced apart from one another, in particular regularly.

In an advantageous embodiment, the housing part has an intermediate wall which has a continuous recess which is at least partially covered by an annular adapter plate which is connected to the intermediate wall and through which contact pins of the electric motor protrude. The advantage here is that the substantially cylindrical receiving area is axially delimited by the intermediate wall and the intermediate wall thus functions as an axial delimitation and/or as an axial stop for the electric motor. The adapter plate is provided for attachment, which makes it possible to connect differently built electric motors. Thus, a large variety of drives can be produced with a small number of different components.

In an advantageous embodiment, an interior area is delimited by the housing part and by a cover connected to the housing part,
wherein the adapter plate is arranged in the interior area,
in particular, the interior area being arranged on the side of the intermediate wall facing away from the electric motor, in particular from the housing of the electric motor. The advantage here is that the angle sensor can be arranged in a protected interior area.

In an advantageous embodiment, the cover has protruding ribs on its inside, in particular on its side facing the interior area.

in particular wherein the ribs form a lattice structure and/or first ribs extending parallel to one another cross second ribs extending parallel to one another. The advantage here is that efficient cooling of air flowing past can be achieved.

In an advantageous embodiment, the cover has a cross web, which is spaced apart from the ribs and is arranged between the ribs and the angle sensor, in particular the cover being designed in two parts, with a first part being designed as a cast part having the ribs and the second part of the cover is designed as a stamped sheet metal having the cross web. The advantage here is that improved, efficient cooling of the air flowing in the interior area is made possible.

In an advantageous embodiment, the rotor shaft of the electric motor protrudes through a recess in the adapter plate, in particular into an interior area, and is connected to the rotor of an angle sensor, the stator of which is connected to a second printed circuit board, which is aligned parallel to the third printed circuit board and is connected to the third printed circuit board is also arranged together in the interior area. The advantage here is that the second and third printed circuit boards are arranged in a protected manner in the interior area and are cooled via the cover connected to the housing part, in that a convective air flow flows along the interior area between the printed circuit boards and the cover.

In an advantageous embodiment, the third printed circuit board and the second printed circuit board are both detachably connected to the housing part and electrically to a first printed circuit board,
wherein the third printed circuit board is connected to the first printed circuit board by means of an electrical plug connection, the electrical plug connection having the mating connector fitted on the first printed circuit board and the plug connector fitted on the third printed circuit board. The advantage here is that a simple connection technique can be used and the production can therefore be carried out efficiently and easily. In addition, different modules can be connected to one another and thus a high degree of variance can be achieved with a small number of parts.

In an advantageous embodiment, an electromagnetically actuable brake is arranged in the electric motor, the control line of which is routed through a recess in the adapter part into the interior area toward the third printed circuit board. The advantage here is that the torque supplied by the electric motor can be controlled and that the control lines are routed to the third printed circuit board, from which the electric motor is also supplied with electrical power via its contact pins. The control lines are electrically connected to the signal electronics, so that the control signals can be routed from the signal electronics to the brake.

In an advantageous embodiment, the third printed circuit board is attached to the housing part, in particular to the intermediate wall of the housing part. The advantage here is that the power is supplied to the electric motor from the first printed circuit board via the third printed circuit board to the electric motor. The power semiconductor switches fitted on the first printed circuit board are connected to the housing part in a thermally conductive manner.

In an advantageous embodiment, the contact pins protrude through the recess in the intermediate wall and through respective recesses in the adapter plate. The advantage here is that simple production is made possible.

In an advantageous embodiment, the first printed circuit board is equipped with power semiconductors, which are thermally conductively connected to the housing part.

in particular wherein the first printed circuit board is attached to the housing part,

in particular wherein the third printed circuit board is equipped with a connector which is plug-connected to the corresponding mating connector which is equipped on the first printed circuit board. The advantage here is that the drive makes it possible to achieve high efficiency, since high power can be generated with a small construction volume.

In an advantageous embodiment, the third printed circuit board is aligned perpendicular to the first printed circuit board,

in particular wherein the third circuit board is aligned parallel to the second circuit board. The advantage here is that the plug-in connection direction for plugging the electric motor into the receiving area is aligned parallel to the first printed circuit board.

In an advantageous embodiment, a fourth printed circuit board is arranged in the electronics module and is equipped with signal electronics, the mating connector part fitted on the fourth printed circuit board being plug-connected to the first or second connector part depending on the orientation of the electronics module. The advantage here is that the control signals for the power semiconductor switches are generated in the electronic module. The electronics module can thus be easily and quickly exchanged for another electronics module, which has, for example, a different control technology and/or different data bus interfaces.

In an advantageous embodiment, sockets are formed and/or cast on the electronics module, into which angled plugs can be inserted in such a way that the cable outlet of the angled plug has an angle of between 20° and 70° to the direction of the axis of rotation of the rotor shaft of the electric motor.

in particular wherein the cable outlet of the angled plug is aligned perpendicular to the normal direction of the plane receiving the first printed circuit board and/or that the cable outlet of the angled plug is perpendicular to the normal direction of the side of the first printed circuit board which is designed as a flat surface and faces away from the housing part. The advantage here is that the sockets are fixed to the electronics module. Thus, the cable outlet on right-angle plugs, which can only be plugged into the sockets in an orientation specified by positive locking, is specified in a defined manner.

In this way, the direction of the cable outlet can be predetermined by the type of design of the electronics module. A different direction of the cable outlet can be specified by exchanging the electronics module.

In an advantageous embodiment, a sealing ring is slipped onto the housing of the electric motor, which seals against the receiving area of the housing part. The advantage here is that the drive can be manufactured with a high degree of protection.

Further advantages result from the dependent claims. The invention is not limited to the combination of features of the claims. For the person skilled in the art, there are further meaningful combinations of claims and/or individual claim features and/or features of the description and/or the figures, in particular from the task and/or the task posed by comparison with the prior art.

• In der 1 ist ein erfindungsgemäßer Antrieb mit abgehobenem Elektronikmodul 12 in Schrägansicht dargestellt.
• In der 2 ist der Antrieb im Unterschied zur 1 aus einer anderen Blickrichtung dargestellt.
• In der 3 ist eine Schnittansicht des Antriebs dargestellt.
• In der 4 ist eine Schrägansicht auf den zusammengebauten Antrieb dargestellt.
• In der 5 ist eine Draufsicht auf das Elektronikmodul 12 mit eingesteckten Winkelsteckern (50, 51, 52) dargestellt.
• In der 6 ist ein Deckel 5 des Antriebs in Schrägansicht dargestellt.
• In der 7 ist ein Querschnitt durch den Antrieb dargestellt bei geöffnetem Elektronikmodul 12.
• In der 8 ist ein Elektromotor 10 des Antriebs dargestellt.

The invention will now be explained in more detail using schematic illustrations:

• In the 1 a drive according to the invention with the electronics module 12 lifted off is shown in an oblique view.
• In the 2 is the drive in contrast to 1 shown from a different perspective.
• In the 3 a sectional view of the drive is shown.
• In the 4 an oblique view of the assembled drive is shown.
• In the 5 is a top view of the electronics module 12 with inserted angle plugs (50, 51, 52) is shown.
• In the 6 a cover 5 of the drive is shown in an oblique view.
• In the 7 A cross section through the drive is shown with the electronic module 12 open.
• In the 8th an electric motor 10 of the drive is shown.

As shown in the figures, the electric motor 10 of the drive is at least partially pushed into a receiving area 1 of a housing part 2 of the drive. The receiving area 1 is cylindrical on the inside and on the outside it has annular ribs projecting radially outwards, which are continuous in the circumferential direction and are spaced from one another in the axial direction, in particular are spaced evenly.

The electric motor 10 rests with its motor housing on the inner wall of the receiving area 1, so that a flow of heat flows away from the motor housing via the receiving area 1 and its ribs to the environment.

The axial direction is parallel to the direction of the axis of rotation of the rotor shaft of the electric motor 10.

The electric motor 10 has axially directed contact pins 83 on its B-side, which are brought into electrical contact when the electric motor 10 is inserted into the receiving area 1 with connection elements, in particular sockets, which are fitted on a third printed circuit board 31 whose normal direction is in the axial direction is aligned.

The third printed circuit board 31 is equipped with a connector 37 which is in contact with a mating connector 36 which is equipped on a first printed circuit board 35 which is aligned perpendicularly to the third printed circuit board 31 .

The first printed circuit board 35 is arranged in the housing part 2, with an electronic module 12 being placed on the housing part 2 of the drive, the mating connector 36 on the first printed circuit board 35 being brought into contact with the connector 37 on the third printed circuit board 31 when this is placed.

The third printed circuit board 31 is arranged in an interior area surrounded by the housing part 2 and a cover 5 attached to the housing part 2 .

A round recess is provided in an intermediate wall 38 of the housing part 2 and is covered with an adapter plate 81 . the adapter plate 81 is detachably connected to the intermediate wall 38 .

The rotor shaft of electric motor 10 protrudes through a recess in adapter plate 81 into the interior area and is connected to the rotor of an angle sensor 30, whose stator is connected to a second circuit board 32, which is aligned parallel to third circuit board 31 and is also arranged in the interior area is.

The third printed circuit board 31 and the second printed circuit board 32 are both detachably connected to the housing part 2 and electrically connected to the first printed circuit board 35 .

An electromagnetically actuable brake is arranged in the electric motor 10, the control line 82 of which is routed through a recess in the adapter plate 81 into the interior area to the third circuit board 31.

The third circuit board 31 is attached to the intermediate wall of the housing part 2 . The contact pins 83 protrude through the recess in the intermediate wall and through respective recesses in the annular adapter plate 81 .

For improved heat dissipation from the interior area, the cover 5 has inwardly protruding ribs 61 on its inside and a cross web 60 which is spaced apart from the ribs 61 and is connected to the edge, in particular to the outer edge.

Air heated by convection from the third printed circuit board or from the angle sensor comprising the second printed circuit board thus flows past the cover 5 and emits heat not only at the cross web 60 but also at the ribs 61 of the cover 5 .

Overall, the heat transfer resistance from the interior area to the external environment is thus reduced by the cover 5 .

Due to the lower temperature level that can be achieved in the interior area, a protective effect is also achieved for the angle sensor.

A fourth printed circuit board 33 , which is equipped with signal electronics, is arranged parallel to the first printed circuit board 35 in the housing 6 of the electronics module 12 . This signal electronics generates pulse width modulated control signals for power semiconductor switches of power electronics, which is fitted on the first printed circuit board 35 and is thermally conductively connected to the housing part 2 which are, in particular pressed against the housing part 2.

The first printed circuit board 35 is attached to the housing part 2 and covered with a thermal barrier 11 which is arranged between the electronics module and the first printed circuit board 35 . In particular, the thermal barrier 11 is mechanically connected to the housing part 2 . Only a first connector part 3 and a second connector part 4 protrude through the thermal barrier 11, so that a mating connector part that is assembled on the fourth printed circuit board 33, depending on the alignment of the electronic module 12 to the housing part 2, either in the first connector part 3 or in the second connector part 4 can be inserted.

The first connector part 3 and the second connector part 4 are arranged in such a way and the corresponding mating connector part is arranged on the electronic module 12 in such a way that this mating connector part can be plugged in when the electronic module 12 is in a first relative orientation to the housing part 2 with the first connector part 3 when it is put on and at a 180 ° rotated orientation of the electronic module 12, the mating connector part with the second connector part 4 can be plugged.

In particular, the first connector part 3 is aligned by an imaginary rotation of 180° around an axis of rotation which intersects the axis of rotation of the rotor shaft and is parallel to the plug-in direction of the plug-in connection formed from the respective connector part (3, 4) and the mating connector part.

The power semiconductor switches, in particular IGBTs, can therefore be cooled via the housing part 2 .

The electronics module 12 can therefore be connected quickly and easily to the rest of the drive. For this purpose, it can be electrically plugged into the plug-in connection with the plug-in connector part 4 when the mating plug-in connector part 3 of the electronic module 12 is put on.

On the upper side of the electronic module 12, that is to say on the side of the housing 6 of the electronic module facing away from the housing part 2, sockets 6, 7 and 8 are cast on.

As in 5 shown, angle plugs (50, 51, 52) can be inserted into the sockets (6, 7, 8), each of which has a cable outlet that is inclined at 90° to the respective plug-in connection direction, i.e. are arranged in a plane whose normal direction is perpendicular to the axis of rotation aligned with the rotor shaft of the electric motor.

However, the sockets (6, 7, 8) are mechanically designed with notches and/or lug areas pointing radially inwards in such a way that the angled plugs (50, 51, 52) provided with correspondingly designed lug areas and/or notches pointing radially outwards only can be plugged in in such an orientation that the respective cable outlet has an angle of less than 90° to the direction of the axis of rotation of the rotor shaft, in particular an angle of between 20° and 70°.

By means of the cast design of the sockets (6, 7, 8), twisting of the angle plugs (50, 51, 52) can be prevented.

In further exemplary embodiments according to the invention, the sockets (6, 7, 8) are not cast on, but are secured against rotation in a form-fitting manner.

Reference List

1

recording area

2

housing part

3

first connector part

4

second connector part

5

Lid

6

Electronic module housing

7

Power outlet

8th

Power outlet

9

Power outlet

10

electric motor

11

thermal barrier

12

electronics module

30

angle sensor

35

first circuit board

32

second circuit board

33

fourth circuit board

34

connector

31

third circuit board

36

mating connector

37

connector

38

partition

50

angle plug

51

angle plug

52

angle plug

60

crossbar

61

ribs

80

sealing ring

81

adapter plate

82

Electric motor brake control line

83

contact pins

Claims (15)

Drive, having an electric motor (10), a housing part (2) and an electronic module (12), wherein the electric motor (10) is plugged into a receiving area (1) of the housing part (2), in particular wherein the receiving area (1) - has a cylindrical inner wall section for receiving the corresponding cylindrical area of the housing (6) of the electric motor (10) - or alternatively has a cuboid inner wall section for receiving the corresponding rectangular area of the housing (6) of the electric motor (10), wherein a mating connector part of the electronics module is electrically plug-connected to a first connector part (3) or to a second connector part (4), the first connector part (3) and the second connector part (4) being assembled on a first printed circuit board (35) which is connected to the housing part (2), the first and second connector parts (3, 4) being arranged on the first printed circuit board (35) in such a way that the first connector part (3) transitions into the second connector part (4) in the event of an imaginary rotation of 180°, wherein the rotation is carried out about an axis of rotation, which is aligned perpendicularly to the insertion direction of the electric motor (10) into the housing part (2) and which is aligned parallel to the normal direction of a plane receiving the first printed circuit board (35) and/or the plane, the electronic module (12) facing side of the power module and / or which is aligned perpendicular to the axis of rotation of the rotor shaft. drive after claim 1 , characterized in that the first connector part (3) is arranged and designed identically to the second connector part (4). Drive according to one of the preceding claims, characterized in that on the outer surface of the receiving area (1) of the housing part (2) on the housing part (2), in particular on the receiving area (1), annular ribs projecting radially outwards and are continuous in the circumferential direction (61) are formed, which are each spaced apart from one another in the axial direction, in particular spaced evenly apart. In particular, the receiving area (1) is designed as an internal cylinder. Drive according to one of the preceding claims, characterized in that the housing part (2) has an intermediate wall (38) which has a continuous recess which is at least partially covered by an annular adapter plate (81) connected to the intermediate wall (38) which is connected to the intermediate wall (38) and through which contact pins (83) of the electric motor (10) protrude. Drive according to one of the preceding claims, characterized in that an interior area is delimited by the housing part (2) and by a cover (5) connected to the housing part (2), the adapter plate (81) being arranged in the interior area, in particular the interior area is arranged on the side of the intermediate wall (38) facing away from the electric motor (10), in particular from the housing (6) of the electric motor (10). Drive according to one of the preceding claims, characterized in that the cover (5) has protruding ribs (61) on its inside, in particular on its side facing the interior area, in particular the ribs (61) forming a lattice structure and/or first towards each other ribs (61) extending parallel to each other cross second ribs (61) extending parallel to one another. Drive according to one of the preceding claims, characterized in that the cover (5) has a crosspiece (60) which is spaced apart from the ribs (61) and is arranged between the ribs (61) and the angle sensor (30), in particular where the cover (5) is designed in two parts, with a first part being designed as a cast part having the ribs (61) and the second part of the cover (5) being designed as a stamped sheet metal having the crossbar (60). Drive according to one of the preceding claims, characterized in that the rotor shaft of the electric motor (10) protrudes through a recess in the adapter plate (81), in particular into an interior area, and is connected to the rotor of an angle sensor (30), the stator of which is connected to a second circuit board (32) is connected, which is aligned parallel to the third printed circuit board (31) and is also arranged together with the third printed circuit board (31) in the interior area. Drive according to one of the preceding claims, characterized in that the third printed circuit board (31) and the second printed circuit board (32) are both detachably connected to the housing part (2) and are electrically connected to a first printed circuit board (35), the third printed circuit board (31) is connected to the first printed circuit board (35) by means of an electrical plug connection (34), the electrical plug connection (34) having the mating connector (36) fitted on the first printed circuit board (35) and the mating connector (36) fitted on the third printed circuit board (31) assembled connector (37). Drive according to one of the preceding claims, characterized in that an electromagnetically actuable brake is arranged in the electric motor (10), the control line (82) of which is routed through a recess in the adapter part into the interior area towards the third printed circuit board (31). Drive according to one of the preceding claims, characterized in that the third printed circuit board (31) is fastened to the housing part (2), in particular to the intermediate wall (38) of the housing part (2). Drive according to one of the preceding claims, characterized in that the contact pins (83) protrude through the recess in the intermediate wall (38) and through respective recesses in the adapter plate (81). Drive according to one of the preceding claims, characterized in that the first printed circuit board (35) is fitted with power semiconductors which are thermally conductively connected to the housing part (2), in particular the first printed circuit board (35) being fixed to the housing part (2), in particular wherein the third printed circuit board (31) is equipped with a connector (37) which is plug-connected to the corresponding mating connector (36) which is equipped on the first printed circuit board (35). Drive according to one of the preceding claims, characterized in that the third printed circuit board (31) is aligned perpendicularly to the first printed circuit board (35), in particular the third printed circuit board (15) is aligned parallel to the second printed circuit board (32), and/or that in A fourth printed circuit board (33) is arranged on the electronic module (12), which is equipped with signal electronics, the mating connector part fitted on the fourth printed circuit board (33) being plug-connected to the first or second connector part (3, 4), depending on the orientation of the electronic module. Drive according to one of the preceding claims, characterized in that sockets (7, 8, 9) are molded and/or cast on the electronic module (12), into which angled plugs (50, 51, 52) can be inserted in such a way that the cable outlet of the The angle plug (50, 51, 52) has an angle to the direction of the axis of rotation of the rotor shaft of the electric motor (10) of between 20° and 70°, in particular the cable outlet of the angle plug (50, 51, 52) being perpendicular to the normal direction of the first printed circuit board ( 35) receiving plane and/or that the cable outlet of the angle plug (50, 51, 52) is perpendicular to the normal direction of the side of the first printed circuit board (35) that is designed as a flat surface and faces away from the housing part (2), and/or that the The housing (6) of the electric motor (10) is fitted with a sealing ring which seals off the receiving area (1) of the housing part (2).

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