Drive, comprising an electric motor, a housing part and an electronic module

Abstract

The invention relates to a drive, comprising an electric motor, a housing part and an electronic module, wherein the electric motor is inserted into a receiving region of the housing part.

Description

[0001] Drive comprising an electric motor, a housing part and an electronic module

[0002] Description:

[0003] The invention relates to a drive comprising an electric motor, a housing part and a

[0004] Electronic module.

[0005] It is common knowledge that a drive has an electric motor.

[0006] From the company brochure of SEW-EURODRIVE “Operating Instructions

[0007] Three-phase motors; Bruchsal, 2021” is an electric motor.

[0008] From the company brochure of SEW-EURODRIVE “Catalog MOVIMOT advanced

[0009] Geared motors; Bruchsal, 2021" is a converter motor.

[0010] A series of electric motors is known from DE 10 2004 063 920 A1.

[0011] An electric motor gate is known from DE 10 2004 033 745 A1.

[0012] A motor connection box and an inverter motor are known from DE 10 2007 034 915 A1.

[0013] From DE 100 36 234 A1 a frequency converter with a housing consisting of an upper part and a lower part is known.

[0014] A drive system is known from DE 10 2013 205 897 A1.

[0015] An electric motor is known from DE 10 2015 219 951 A1.

[0016] An electric motor with an integrated rotary encoder is known from DE 10 2018 108 716 A1. The invention is therefore based on the object of developing a device and a method in which the drive is to be compact and efficient, as well as being as simple and cost-effective to manufacture as possible.

[0017] According to the invention, the object is achieved by the drive according to the features specified in claim 1.

[0018] Important features of the invention for the drive comprising an electric motor, a housing part, and an electronics 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. Advantageously, a plug-in interface is created between the electric motor and the rest of the drive, which enables the replacement 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 enables a higher maximum power to be achieved.

[0019] The electronics module, which is also connected via a pluggable connection, allows for a wide variety of drives with a small number of different electric motors and electronic modules. The plug-in interfaces are quick and therefore cost-effective to use.

[0020] In addition, recycling is quick and easy because the different modules can be separated quickly and easily.

[0021] Efficient heat dissipation is achieved by inserting the electric motor into the housing, which has ribs on the outside. Furthermore, the power electronics, or their power semiconductor switches, can be pressed against the housing part, thus efficiently dissipating heat.

[0022] In this way, the drive can be designed compactly, i.e. with high performance per unit volume.

[0023] In particular, the receiving area (1) has a cylindrical inner wall section for receiving the corresponding cylindrical area of ​​the housing of the electric motor or alternatively has a cuboid-shaped inner wall section for receiving the corresponding rectangular area of ​​the housing of the electric motor.

[0024] In an advantageous embodiment, a mating connector of the electronic 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 mounted on a first printed circuit board which is connected to the housing part, wherein the first and the second connector part are arranged on the first printed circuit board in such a way that the first connector part merges into the second connector part upon an imaginary rotation of 180°, in particular is arranged and designed identically to the second connector part, in particular wherein the rotation is carried out about an axis of rotation which is oriented perpendicular to the direction of insertion of the electric motor into the housing part and which is oriented parallel to the normal direction of a plane receiving the first printed circuit board and / or the flat,The side of the power module facing the electronics module and / or which is aligned perpendicular to the rotor shaft's axis of rotation. The advantage here is that the electronics module can be mounted in two different orientations, allowing the cable outlets to be aligned in different directions.

[0025] 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, there are formed annular ribs which project radially outwards and are continuous in the circumferential direction and which are spaced apart from one another, in particular evenly spaced, in the axial direction.

[0026] In particular, the mounting area is designed as an internal cylinder. This is advantageous because it allows the electric motor to fit as tightly as possible against the mounting area, thus resulting in low heat transfer resistance. Furthermore, the concentrically arranged annular ribs increase the surface area and thus also reduce heat transfer resistance. In the axial direction, i.e., in the direction of the rotational axis of the electric motor's rotor shaft and / or in the direction of the electric motor's plug connection, the ribs are particularly regularly spaced from one another.

[0027] In an advantageous embodiment, the housing part has an intermediate wall having a continuous recess which is at least partially covered by an annular adapter plate connected to the intermediate wall, which is connected to the intermediate wall and through which contact pins of the electric motor protrude. The advantage here is that the essentially cylindrical receiving area is axially delimited by the intermediate wall, and thus the intermediate wall acts as an axial limit and / or as an axial stop for the electric motor. The adapter plate is provided for fastening, making it possible to connect differently constructed electric motors. This allows a high variety of drives to be produced using a small number of different components.

[0028] In an advantageous embodiment, an interior region is delimited by the housing part and by a cover connected to the housing part, wherein the adapter plate is arranged in the interior region, in particular wherein the interior region is arranged on the side of the partition wall facing away from the electric motor, in particular from the housing of the electric motor. It is advantageous that the angle sensor can be arranged in a protected interior region.

[0029] In an advantageous embodiment, the cover has protruding ribs on its inner side, in particular on its side facing the interior region, 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 heat dissipation of passing air can be achieved. In an advantageous embodiment, the cover has a cross web which is spaced from the ribs and is arranged between the ribs and the angle sensor, in particular wherein the cover is designed in two parts, with a first part being designed as a cast part having the ribs and the second part of the cover being designed as a stamped sheet metal having the cross web. The advantage here is that improved efficient heat dissipation of the air flowing in the interior region is enabled.

[0030] In an advantageous embodiment, the rotor shaft of the electric motor protrudes through a recess in the adapter plate, in particular into an interior region, and is connected to the rotor of an angle sensor, the stator of which is connected to a second circuit board that is aligned parallel to the third circuit board and, together with the third circuit board, is also arranged in the interior region. Advantageously, the second and third circuit boards are arranged in a protected manner in the interior region and are cooled via the cover connected to the housing part, by a convective air flow flowing along the interior region between the circuit boards and the cover.

[0031] In an advantageous embodiment, the third circuit board and the second circuit board are both detachably connected to the housing part and electrically connected to a first circuit board, wherein the third circuit board is connected to the first circuit board by means of an electrical plug connection, wherein the electrical plug connection comprises the mating connector mounted on the first circuit board and the connector mounted on the third circuit board. This advantageously allows for the use of a simple connection technology, thus making production efficient and easy. Furthermore, different modules can be connected to one another, thus achieving a high degree of variance with a small number of parts.

[0032] In an advantageous embodiment, an electromagnetically actuated 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 to the third circuit board. This is advantageous in that the torque delivered by the electric motor is controllable and that the control lines are routed to the third 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.

[0033] In an advantageous embodiment, the third circuit board is attached to the housing part, in particular to the intermediate wall of the housing part. Advantageously, the power supply to the electric motor is provided from the first circuit board via the third circuit board to the electric motor. The power semiconductor switches mounted on the first circuit board are thermally connected to the housing part.

[0034] In an advantageous embodiment, the contact pins protrude through the recess in the partition wall and through respective recesses in the adapter plate. This allows for simple manufacturing.

[0035] In an advantageous embodiment, the first circuit board is equipped with power semiconductors that are thermally connected to the housing part, in particular, the first circuit board being attached to the housing part, and in particular, the third circuit board is equipped with a connector that is plugged into the corresponding mating connector mounted on the first circuit board. The advantage here is that the drive enables high efficiency, since high power can be generated with a small installation volume.

[0036] In an advantageous embodiment, the third circuit board is aligned perpendicular to the first circuit board, in particular, the third circuit board is aligned parallel to the second circuit board. It is advantageous that the plug connection direction for inserting the electric motor into the receiving area is aligned parallel to the first circuit board.

[0037] In an advantageous embodiment, a fourth circuit board is arranged in the electronic module, which is equipped with signal electronics. The mating connector part mounted on the fourth circuit board is plugged into the first or second connector part, depending on the orientation of the electronic module. Advantageously, the control signals for the power semiconductor switches are generated in the electronic module. Thus, the electronic module can be easily and quickly replaced with another electronic module, for example, one with different control technology and / or different data bus interfaces.

[0038] In an advantageous embodiment, sockets are formed and / or cast onto the electronics module, into which right-angle plugs can be plugged such that the cable outlet of the right-angle plug has an angle to the direction of the axis of rotation of the rotor shaft of the electric motor of between 20° and 70°, in particular wherein the cable outlet of the right-angle plug is aligned perpendicular to the normal direction of the plane receiving the first circuit board and / or wherein the cable outlet of the right-angle plug is perpendicular to the normal direction of the side of the first circuit board, which side is designed as a flat surface and faces away from the housing part. It is advantageous in this case that the sockets are permanently attached to the electronics module. The cable outlet on right-angle plugs, which can only be plugged into the sockets in an orientation predetermined by a positive fit, is thus predetermined in a defined direction.

[0039] In this way, the direction of the cable outlet can be specified by the design of the electronic module. By replacing the electronic module, a different cable outlet direction can be specified.

[0040] In an advantageous embodiment, a sealing ring is attached to the housing of the electric motor, which seals off the receiving area of ​​the housing part. This is advantageous because the drive can be manufactured with a high degree of protection.

[0041] Further advantages emerge from the dependent claims. The invention is not limited to the combination of features in the claims. Further possible combinations of claims and / or individual claim features and / or features of the description and / or the figures will become apparent to those skilled in the art, particularly from the problem and / or the problem posed by comparison with the prior art. The invention will now be explained in more detail with reference to schematic illustrations:

[0042] Figure 1 shows an oblique view of a drive according to the invention with the electronic module 12 removed.

[0043] In Figure 2, the drive is shown from a different perspective than in Figure 1.

[0044] Figure 3 shows a sectional view of the drive.

[0045] Figure 4 shows an oblique view of the assembled drive.

[0046] Figure 5 shows a top view of the electronic module 12 with inserted angle plugs (50, 51, 52).

[0047] Figure 6 shows a cover 5 of the drive in an oblique view.

[0048] Figure 7 shows a cross-section through the drive with the electronic module 12 open.

[0049] Figure 8 shows an electric motor 10 of the drive.

[0050] As shown in the figures, the electric motor 10 of the drive is at least partially inserted into a receiving area 1 of a housing part 2 of the drive. The receiving area 1 is cylindrical on the inside and has radially projecting annular ribs that are continuous in the circumferential direction and spaced apart from one another, in particular evenly spaced, in the axial direction.

[0051] The electric motor 10 rests with its motor housing against the inner wall of the receiving area 1, so that a heat flow from the motor housing flows through the receiving area 1 and its ribs to the environment. The axial direction is parallel to the direction of the rotational axis of the rotor shaft of the

[0052] Electric motor 10.

[0053] The electric motor 10 has axially directed contact pins 83 on its B-side, which, when the electric motor 10 is inserted into the receiving area 1, are brought into electrical contact with connection elements, in particular plug sockets, which are mounted on a third printed circuit board 31, the normal direction of which is aligned in the axial direction.

[0054] The third circuit board 31 is equipped with a connector 37 which is in contact with a mating connector 36 which is mounted on a first circuit board 35 which is aligned perpendicular to the third circuit board 31.

[0055] The first circuit board 35 is arranged in the housing part 2, wherein an electronic module 12 is placed on the housing part 2 of the drive, wherein during this placement the mating connector 36 of the first circuit board 35 is brought into contact with the connector 37 of the third circuit board 31.

[0056] The third 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.

[0057] A round recess is provided in an intermediate wall 38 of the housing part 2, which is covered with an adapter plate 81. The adapter plate 81 is detachably connected to the intermediate wall 38.

[0058] The rotor shaft of the electric motor 10 projects into the interior region through a recess in the adapter plate 81 and is connected to the rotor of an angle sensor 30, the stator of which is connected to a second circuit board 32, which is aligned parallel to the third circuit board 31 and is also arranged in the interior region.

[0059] The third circuit board 31 and the second circuit board 32 are both detachably connected to the housing part 2 and electrically connected to the first circuit board 35. An electromagnetically actuated 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 of ​​the third circuit board 31.

[0060] The third circuit board 31 is attached to the intermediate wall of the housing part 2.

[0061] The contact pins 83 protrude through the recess of the intermediate wall and through respective recesses of the annular adapter plate 81.

[0062] For improved heat dissipation from the interior area, the cover 5 has ribs 61 projecting inwards on its inside and a cross web 60 which is spaced from the ribs 61 and is connected to the edge, in particular to the outer edge.

[0063] Thus, air heated by the third circuit board or by the angle sensor comprising the second circuit board flows convectively past the cover 5 and releases heat not only at the cross bar 60 but also at the ribs 61 of the cover 5.

[0064] Overall, the cover 5 reduces the heat transfer resistance from the interior to the external environment.

[0065] The lower temperature level achieved in the interior also provides protection for the angle sensor.

[0066] Arranged parallel to the first circuit board 35 in the housing 6 of the electronics module 12 is a fourth circuit board 33, which is equipped with signal electronics. This signal electronics generates pulse-width-modulated control signals for power semiconductor switches of a power electronics system, which is mounted on the first circuit board 35 and is thermally conductively connected to the housing part 2, in particular, pressed against the housing part 2.

[0067] The first 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 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, which is mounted on the fourth circuit board 33, can be plugged into either the first connector part 3 or the second connector part 4, depending on the orientation of the electronics module 12 to the housing part 2.

[0068] 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 into the first connector part 3 when placed in a first relative orientation of the electronic module 12 to the housing part 2 and the mating connector part can be plugged into the second connector part 4 when the electronic module 12 is rotated by 180°.

[0069] In particular, the first connector part 3 is oriented by an imaginary rotation of 180° about 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 connection formed by the respective connector part (3, 4) and the mating connector part.

[0070] The cooling of the power semiconductor switches, in particular IGBTs, is therefore made possible via housing part 2.

[0071] The electronics module 12 can therefore be quickly and easily connected to the rest of the drive. To this end, it is electrically connected to the connector part 4 by means of the plug connection when the mating connector part 3 of the electronics module 12 is attached.

[0072] Sockets 6, 7 and 8 are cast onto the top side of the electronic module 12, i.e. on the side of the housing 6 of the electronic module facing away from the housing part 2.

[0073] As shown in Figure 5, angle plugs (50, 51, 52) can be plugged into the sockets (6, 7, 8), each having a cable outlet that is inclined at 90° to the respective plug connection direction, i.e. are arranged in a plane whose normal direction is aligned perpendicular to the axis of rotation of the rotor shaft of the electric motor.

[0074] However, the sockets (6, 7, 8) are mechanically designed with radially inwardly directed notches and / or nose areas in such a way that the angle plugs (50, 51, 52) provided with correspondingly designed radially outwardly directed nose areas and / or notches can only be plugged 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 between 20° and 70°.

[0075] The cast-on design of the sockets (6, 7, 8) prevents the angle plugs (50, 51, 52) from twisting.

[0076] In further embodiments according to the invention, the sockets (6, 7, 8) are not cast on, but are positively secured against rotation.

[0077] List of reference symbols

[0078] 1 recording area

[0079] 2 Housing part

[0080] 3 first connector part

[0081] 4 second connector part

[0082] 5 lids

[0083] 6 Housing of the electronic module

[0084] 7 socket

[0085] 8 socket

[0086] 9 socket

[0087] 10 Electric motor

[0088] 11 Thermal barrier

[0089] 12 Electronic module

[0090] 30 angle sensor

[0091] 35 first circuit board

[0092] 32 second circuit board

[0093] 33 fourth circuit board

[0094] 34 plug connection

[0095] 31 third circuit board

[0096] 36 mating connectors

[0097] 37 connectors

[0098] 38 Partition wall

[0099] 50 angle plugs

[0100] 51 angle plug

[0101] 52 angle plugs

[0102] 60 Cross Bridge

[0103] 61 ribs

[0104] 80 sealing ring

[0105] 81 adapter plate

[0106] 82 Control line of the electric motor brake

[0107] 83 contact pins

Claims

Patent claims:

1. Drive comprising an electric motor (10), a housing part (2) and an electronic module (12), characterized in that the electric motor (10) is inserted 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).

2. Drive according to claim 1, characterized in that a mating connector part of the electronic module is electrically connected to a first connector part (3) or to a second connector part (4), wherein the first connector part (3) and the second connector part (4) are mounted on a first circuit board (35) which is connected to the housing part (2), wherein the first and the second connector parts (3, 4) are arranged on the first circuit board (35) such that the first connector part (3) transitions into the second connector part (4) upon an imaginary rotation by 180°, in particular being arranged and designed identically to the second connector part (4), in particular wherein the rotation is carried out about an axis of rotation.which is aligned perpendicular 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 circuit board and / or the flat side of the power module facing the electronic module (12) and / or which is aligned perpendicular to the axis of rotation of the rotor shaft.

3. 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), radially outward projecting, circumferentially continuous, annular ribs (61) are formed which are spaced apart from each other in the axial direction, in particular uniformly spaced. In particular, the receiving area (1) is designed as an inner cylinder.

4. 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) and through which contact pins (83) of the electric motor (10) protrude.

5. Drive according to one of the preceding claims, characterized in that an interior area is bounded by the housing part (2) and by a cover (5) connected to the housing part (2), wherein the adapter plate (81) is arranged in the interior area, in particular wherein the interior area is arranged on the side of the partition (38) facing away from the electric motor (10), in particular from the housing (6) of the electric motor (10).

6. Drive according to one of the preceding claims, characterized in that the cover (5) has projecting ribs (61) on its inside, in particular on its side facing the interior area, in particular wherein the ribs (61) form a grid structure and / or first ribs (61) extending parallel to each other cross second ribs (61) extending parallel to each other.

7. Drive according to one of the preceding claims, characterized in that the cover (5) has a crossbar (60) which is spaced apart from the ribs (61) and is arranged between the ribs (61) and the angle sensor (30), in particular wherein the cover (5) is designed in two parts, wherein a first part is designed as a cast part having the ribs (61) and the second part of the cover (5) is designed as a stamped sheet metal having the crossbar (60).

8. Drive according to one of the preceding claims, characterized in that the rotor shaft of the electric motor (10) projects through a recess of 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) which is aligned parallel to the third circuit board (31) and is also arranged in the interior area together with the third circuit board (31).

9. Drive according to one of the preceding claims, characterized in that the third circuit board (31) and the second circuit board (32) are both detachably connected to the housing part (2) and are electrically connected to a first circuit board (35), wherein the third circuit board (31) is connected to the first circuit board (35) by means of an electrical connector (34), wherein the electrical connector (34) has the mating connector (36) mounted on the first circuit board (35) and the connector (37) mounted on the third circuit board (31).

10. Drive according to one of the preceding claims, characterized in that an electromagnetically actuated brake is arranged in the electric motor (10), the control line (82) of which is guided through a recess of the adapter part into the interior area towards the third circuit board (31).

11. Drive according to one of the preceding claims, characterized in that the third circuit board (31) is attached to the housing part (2), in particular to the intermediate wall (38) of the housing part (2).

12. Drive according to one of the preceding claims, characterized in that the contact pins (83) protrude through the recess of the intermediate wall (38) and through respective recesses of the adapter plate (81).

13. Drive according to one of the preceding claims, characterized in that the first circuit board (35) is equipped with power semiconductors which are thermally connected to the housing part (2), in particular wherein the first circuit board (35) is attached to the housing part (2), in particular wherein the third circuit board (31) is equipped with a connector (37) which is pluggably connected to the corresponding mating connector (36) which is mounted on the first circuit board (35).

14. Drive according to one of the preceding claims, characterized in that the third circuit board (31) is oriented perpendicular to the first circuit board (35), in particular wherein the third circuit board (15) is oriented parallel to the second circuit board (32), and / or that a fourth circuit board (33) is arranged in the electronics module (12), which is equipped with signal electronics, wherein the mating connector part mounted on the fourth circuit board (33) is pluggably connected to the first or second connector part (3, 4) depending on the orientation of the electronics module.

15. Drive according to one of the preceding claims, characterized in that sockets (7, 8, 9) are integrally formed and / or cast onto the electronic module (12), into which angled plugs (50, 51, 52) can be inserted such that the cable exit of the angled plugs (50, 51, 52) has an angle to the direction of the axis of rotation of the rotor shaft of the electric motor (10) between 20° and 70°, in particular wherein the cable exit of the angled plugs (50, 51, 52) is oriented perpendicular to the normal direction of the plane receiving the first circuit board (35) and / or that the cable exit of the angled plugs (50, 51, 52) is oriented perpendicular to the normal direction of the side of the first circuit board (35) facing away from the housing part (2), which is designed as a flat surface, and / or that a sealing ring is placed on the housing (6) of the electric motor (10), which seals towards the receiving area (1) of the housing part (2).

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