Drive with segmented converter housing

Abstract

The invention relates to the production of an electronic accessory (13) for a drive having a regulator component and / or a converter component by the following steps: providing a plurality of circuit boards (26, 27), each having an electrical conductor track arranged on the circuit board, the conductor track having an electrical connection, assembling the designed circuit boards (26, 27) with electrical components and / or electronic components provided for the circuit boards, carrying out an electrical check of the assembly, wiring, etc., arranging a section (31) on at least two circuit boards so that the section forms an almost circumferentially closed cover (20) by a bending process in the region of the electrical connection between the circuit boards, arranging a cover (36) on the open side of the cover (20) in order to thereby obtain a closed housing arrangement (38).

Description

Technical Field

[0001] The invention relates to an electronic accessory, a drive unit having an electric machine and at least one electronic accessory, and the production of an electronic accessory. Background Art

[0002] Drive systems with variable speed are composed of a motor and a converter, which form a common unit.

[0003] Such a drive unit is known, for example, from DE 198 12 729 A1. Therein, an electric motor, in particular an electric motor having a fan impeller for forming an axial or radial fan, is described, comprising a drive unit and a control unit having a control housing. The drive unit comprises a stator, a rotor, and at least one electric coil, and the control unit comprises an electronic circuit for controlling or regulating the power supply to the coil. The drive unit and the control unit are formed by modules, and mutually associated contact elements are provided for electrical connection to each other.

[0004] A drive unit is also known from DE 38 42 588 A1. This document describes a brushless DC external rotor motor consisting of a stator with stator windings attached to a motor flange, an external rotor surrounding the stator on its side facing away from the motor flange, and an electronic circuit arrangement for controlling the stator windings. The circuit arrangement includes a printed circuit board, located on the side of the flange facing the stator and carrying electronic components, and a plurality of power semiconductors electrically connected to the printed circuit board and arranged in thermally conductive contact with the motor flange. The power semiconductors are indirectly thermally connected to the motor flange via an annular, disk-shaped heat sink. The heat sink forms a preassembled assembly with the printed circuit board and a carrier element that holds the printed circuit board.

[0005] Manufacturing the drive system, consisting of a motor and a converter, also involves assembling the power electronics on a printed circuit board and installing them in an aluminum cast housing, along with further power electronics within the aluminum cast housing. The printed circuit board does not provide sufficient space to mount the complete power electronics. Therefore, the power electronics must be partially mounted on the inside of the cast housing.

[0006] The cast housing also acts as a heat sink. To ensure good heat dissipation from the cast housing, it must have appropriate flatness, surface roughness, and thermal connection to the corresponding power electronics. However, due to the die-casting process, post-processing is required to ensure the required dimensional, shape tolerances, and surface roughness, which cannot be guaranteed due to shrinkage or shrinkage cavities during cooling. Furthermore, numerous threaded holes are required to secure the cover, printed circuit boards, cable entry, and power electronics. Some of these threaded holes require relatively complex processing because they are located on the inside of the cast housing, forming undercuts.

[0007] This also results in a complex and confusing wiring arrangement within the cast housing, which also requires a great deal of manual effort under extremely tight spatial conditions.

[0008] In particular, automated production and automated testing of power components are therefore hardly possible. Summary of the Invention

[0009] Based on this, the object of the present invention is to create a compact electronics accessory and a compact drive unit which ensure adequate cooling of the drive unit and can be produced with little effort.

[0010] The solution to the proposed object is achieved by producing an electronic accessory for a drive having a regulator component and / or a converter component according to the following steps:

[0011] - providing a plurality of printed circuit boards, in particular arranged in a two-dimensional manner, with electrical conductor tracks, each of which is arranged on the printed circuit board and has electrical connections,

[0012] - assembling a two-dimensional printed circuit board with electrical and / or electronic components provided therefor,

[0013] -Electrical inspection of assembly, wiring, etc.,

[0014] - arranging the segments on at least two circuit boards such that the segments form an almost circumferentially closed cover by a bending process in the region of the electrical connection between the circuit boards,

[0015] - Arranging a cover at the open side of the cover, in order to thereby obtain a closed housing arrangement (38).

[0016] In this case, the processing steps can be carried out at least partially sequentially and / or simultaneously.

[0017] The solution is also achieved by an electronic accessory having a regulator component or a converter component, which is arranged on a circuit board, wherein the circuit boards are arranged in a star shape, with a central circuit board and edge circuit boards surrounding the central circuit board, the edge circuit boards being electrically conductively connected to at least the central circuit board.

[0018] wherein the circumferential cover is composed of at least two segments,

[0019] wherein each segment is in direct thermal contact with at least one edge circuit board,

[0020] The central printed circuit board has a centrally arranged cutout.

[0021] Therein, at least one edge circuit board is arranged to be bent at a predetermined angle relative to the central circuit board at a bending section.

[0022] The solution to the proposed object is also achieved by a drive having at least one electric rotating machine,

[0023] - at least one electronic accessory,

[0024] - at least one cooling unit,

[0025] - wherein the components of the drive are arranged axially one after the other, so that the electronic accessories are arranged axially between the electric rotating machine and the cooling unit,

[0026] - wherein the electronic accessories are cooled by a cooling air flow.

[0027] The entire circuit board according to the present invention is composed of multiple, preferably continuous, sub-circuit boards, particularly a central circuit board and its edge circuit boards. The edge circuit boards are connected to the central circuit board via flexible conductive structures, particularly rigid-flex connections. After the central circuit board and the individual edge circuit boards are assembled, these connections can be bent at predetermined locations at defined angles. This bending process can also be performed without tools.

[0028] This allows the complete power electronics to be mounted on the individual circuit boards during the assembly process. Consequently, no further power electronics need to be manually installed in the housing. The use of a rigid-flexible connection allows for optimal use of the available installation space in the housing.

[0029] According to the invention, the housing arrangement of the electronic accessory is no longer manufactured as a cast housing, but is divided into a plurality of preferably identical sections which can be manufactured by means of an extrusion method.

[0030] The segments are made of a material that conducts heat relatively well, for example aluminum or an aluminum alloy.

[0031] Compared to extrusion tools, this results in cost advantages due to the elimination of expensive die casting dies.

[0032] Compared to cast housings, the extruded profiles' dimensional accuracy, flatness, and surface roughness require no further processing. Furthermore, since this design lacks undercuts, it's easier to create the holes for securing the edge circuit boards. The holes for securing the cover are integrated into the extrusion tool, eliminating the need for drilling. Extruded profiles also offer better thermal conductivity than die-cast housings due to their more uniform microstructure and lack of shrinkage cavities.

[0033] This significantly increases the degree of automation for manufacturing electronic components and thus drives. The entire circuit board, consisting of a central and peripheral circuit board with the corresponding power electronics, can be assembled fully automatically. Subsequent testing of the entire circuit board can also be fully automated, as this advantageously takes place on a single surface.

[0034] In this context, the power electronics of a regulator and / or converter and the electrical components and electronic components in the electronic accessories are understood to mean the electronics required for a drive or electric motor, which can include one or more of the components listed as examples. This includes drive electronics with a power supply, a module for monitoring voltage, current or thermal conditions, power semiconductors (IGBTs, triacs, thyristors, etc.), integrated protection functions (overcurrent, undervoltage, short circuit, etc.), a brake chopper, etc.

[0035] The power electronics arranged on the printed circuit board are contacted, for example, via plug connections, solder connections, etc. The power electronics are fixedly connected to one or more associated segments before, after, or during contact with the edge printed circuit board. This connection is thermally conductive, which is facilitated by the choice of material and, if applicable, by a thermally conductive paste.

[0036] By bending or angling the edge circuit boards relative to the central circuit board (preferably at a 90° angle), the individual segments can now be connected using connectors. This creates a closed circumferential surface—the cover. The edge circuit boards, arranged substantially tangentially, are located on the inner side of the cover. At least one side of the edge circuit boards is electrically connected to the central circuit board. The central circuit board is arranged substantially perpendicular to the axis of the drive.

[0037] In combination with the upper and lower covers and the cover, a closed housing arrangement for the electronic accessory is created. Due to the electrically conductive connection between the central circuit board and the edge circuit boards, no further wiring is required in the interior of the housing arrangement.

[0038] By using central and edge circuit boards, complete power electronics can be automatically assembled onto the corresponding circuit boards and tested. This results in higher productivity and a significant reduction in assembly costs.

[0039] In order to achieve the required dimensional accuracy, flatness and surface roughness, no further processing steps are required on the cover and on the segments, since the cover and the segments can be produced by means of an extrusion method.

[0040] The cover or the section is made of a relatively good thermally conductive material, for example aluminum or an aluminum alloy.

[0041] This allows for simpler and more cost-effective production of the power electronics, which are also thermally coupled to the segments. Only threaded holes for securing the power electronics and the cable guides need to be produced. The holes for securing the cover are already integrated into the extruded profile.

[0042] Furthermore, by using an extrusion manufacturing process, each individual segment has better cooling properties compared to a die-casting process.Furthermore, expensive die-casting dies can be replaced by extrusion tools, which are inherently cheaper.

[0043] This results in a very compact and high-performance drive, the components of which, in particular the electronic accessories and also the electric rotating machine, can be adequately cooled.

[0044] Elements of the electronic accessory, such as power semiconductors, control units and regulating units, are cooled via the cover of the electronic accessory. In electric rotating machines, the stator and the rotor are cooled, in particular, via the shaft and a cooling air flow guided along the housing of the electric rotating machine.

[0045] The entire cover, formed by the segments, is essentially tubular in design. The housing for the electronics is formed by covers that are attached on both sides. Depending on the drive system, the cover has a central opening—just like the central printed circuit board. This axial opening is sealed contactlessly by a tube facing the shaft. The shaft, which also serves as the drive shaft for the cooling unit, particularly the fan, now extends contactlessly through the opening. This allows, for example, for proper self-ventilation of the drive.

[0046] The cover or the segment has axially extending and radially extending ribs on its outer side. The inner side of the segment is preferably designed to be flat in order to directly and effectively couple the regulator component or converter component to the inner side of the segment.

[0047] The rotor of the electric machine is also cooled via the shaft. Furthermore, heat from the rotor is dissipated into the interior of the electric rotating machine, which can also heat the bearing plate, bearings, and housing. This heat input is dissipated by air flowing around the housing and bearing plate, in particular by an adaptable cooling unit, such as a fan.

[0048] The stator also generates heat, which in turn heats the interior of the electric rotating machine. This heat input is also dissipated by the air flowing around the housing and the bearing guard. Furthermore, the stator is preferably retracted into the housing's outer shell to achieve relatively good heat transfer from the stator's laminated core to the housing and its ribs.

[0049] The cooling unit, which is typically designed as its own fan, generates a cooling air flow during operation of the electric rotating machine. This cooling air flow is initially directed radially along the housing of the electronic accessory. A fan cover extending axially toward the AS bearing also directs the cooling air flow along cooling ribs of the housing and cover of the electric rotating machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The invention and further advantageous embodiments of the invention are described in more detail based on the exemplary embodiments shown in principle; it is shown that:

[0051] Figure 1 A schematic longitudinal section of a drive according to the present invention is shown,

[0052] Figure 2 shows an overall circuit board with a central circuit board and edge circuit boards,

[0053] Figure 3 shows a circuit board arrangement with sections,

[0054] Figure 4 Shows electronic accessories,

[0055] Figure 5 Shows a perspective view of the drive. DETAILED DESCRIPTION

[0056] Figure 1 The schematic longitudinal section of a drive 1 is shown, which has an electric rotating machine 2 and a stator 3 with a laminated core 5. In the laminated core 5 of the stator 3, a winding system is arranged facing an air gap 19, which forms a winding head 4 at the end of the laminated core 5 of the stator 3. The laminated core 8 of the rotor 6 is connected to the shaft 9 in a rotationally fixed manner and is in electromagnetic interaction with the energized winding system of the stator 3, thereby causing the shaft 9 to rotate about an axis 18. The shaft 9 is held in two bearings, namely an AS bearing 11 and a BS bearing 12.

[0057] The electric rotating machine 2 is surrounded by a housing 10, which is delimited at the end by a bearing guard 14. An electronic accessory 13, which contains at least components of a converter and / or a regulator, is axially spaced apart from the bearing side of the bearing assembly. The electronic accessory 13 is stationary and not connected to the shaft in a rotationally fixed manner. Axially connected to the electronic accessory 13 is a fan 15, which is in turn connected to the shaft 9 in a rotationally fixed manner and generates a cooling air flow that is directed through a fan cover 16. The air flow is supplied to the fan 15 via an intake opening 17.

[0058] During operation, heat accumulates in the drive 1, particularly between the electronics 13 and the facing bearing plate 14. Heat is input from both axial sides. Consequently, heat losses from the converter and / or regulator, i.e., the electronics 13, as well as heat from the machine 2, via the bearing plate, lead to a heat accumulation between the various components. Heat from the machine 2 also comprises heat losses from the stator 3 and rotor 6. This heat also heats the adjacent bearings 11 and 12, which damages their lubricant and requires shorter relubrication intervals.

[0059] Heat is also transferred via the shaft 9, in particular from the rotor 6 of the electric rotary machine 2, and is supplied to the fan 15, which also functions as a heat removal element. The fan 15 also generates a cooling air flow during operation of the electric rotary machine 2.

[0060] The electronic accessory 13 is spaced apart from the shaft 9 and is fixed in position and is fastened via a mechanical connection to an adjacent bearing guard and / or to the fan cover 16 .

[0061] The electrical connection and / or data lines between the electronic accessory 13 and the electric machine 2 can be realized via the cover 36 and the opening in the opposite bearing plate 14 .

[0062] It is also possible to feed the lines via the connecting element 32 into the terminal box 37 of the electric machine 2 .

[0063] These connections are all made via the bearing plate 14 and / or the housing 10 and / or the terminal box 37 on the housing 10 while adhering to the corresponding predefined degree of protection.

[0064] Figure 2An exemplary arrangement of an overall circuit board with a central circuit board 27 and edge circuit boards 26 in one plane is shown. Several power modules are arranged on central circuit board 27 and are electrically contacted with power modules arranged on edge circuit boards 26 via rigid-flex connections in bends 28. In this example, central circuit board 27 has a hexagonal basic shape, with one side being free of edge circuit boards 26 to allow for connection options there, for example, to a motor and / or terminal box 37. Other basic shapes for central circuit board 27, such as triangular, quadrangular, octagonal, or dodecagonal basic shapes, are also possible.

[0065] The bending line of the bending section 28 runs parallel to the corresponding outer edge of the selected basic shape.

[0066] Obviously, obliquely running bending lines are also conceivable, which also depends on the selected basic shape and its angle.

[0067] Figure 3 The diagram shows the bent edge circuit board 26 and its thermal contact with the corresponding section 31. The edge circuit board 26 is arranged bent at a predetermined angle, in particular 90 degrees, relative to the central circuit board 27 at the bent section 28.

[0068] The edge circuit board 26 with its power modules is thermally coupled as directly as possible to the section 31 .

[0069] Thus, there is a thermally conductive connection 34 from the edge circuit board 26 at least to its corresponding segment 31. The segments 31 have holes 33 for receiving a cover 36—not yet shown in this figure. The individual segments 31 are mechanically connected to one another via connectors 23 (connection elements such as screws, snap connections, etc.), thereby forming a circumferentially closed cover 20. In addition to the mechanical fastening, the connectors can also optionally represent thermally conductive connections in order to achieve a uniform temperature of the electronic accessory 13 via the cover 20.

[0070] The cover 20 and thus also the section 31 are made of a material with good thermal conductivity, so that the heat loss from the electronic accessories 13 and also from the regulator components and / or converter components caused by the component 30 and / or the power module can also be dissipated to the cooling air flow. In addition, the ribs 21 at the section 30 improve the heat dissipation effect, especially when Figure 1 As shown, the fan shroud 16 directs the cooling air flow.

[0071] Figure 4The enclosed electronics accessory 13 is shown, its housing 38 formed by a substantially cylindrical cover 20 and two lids 36. Between the lids 36, in the region of the opening 29 in the central circuit board 27, a tube 35 is located to allow the shaft to pass through. This allows the drive 1 to be self-ventilated, as the shaft 9 can directly drive the fan 15. The shaft 9 does not come into contact with the tube 35, preventing heat transfer to the electronics accessory 13.

[0072] Alternatively or additionally, an external fan can also be provided.

[0073] Connecting elements 32 are provided in the region of the “missing” edge circuit boards 26 to ensure power supply to the drive 1. If edge circuit boards 26 are provided on all sides of the central circuit board 27, power supply can also take place via the cover 36.

[0074] Advantageously, the ribs 21 are axially aligned with the ribs of the housing 10 of the electric rotating machine 2 , in order thus to enable the cooling air flow to be opposed with as little flow resistance as possible.

[0075] By means of the cover 20 and of a corresponding design of the lid 36 , the electronic accessory 13 can comply with an even higher degree of protection.

[0076] Furthermore, the cover 20 serves as a thermal buffer for fluctuating operating states of the drive 1 , such as brief overloads.

[0077] According to the simplified diagram of the drive 1 Figure 5 The fan cover 16 can also have a lead-through 22 for contacting the electronic accessory 13. In addition, the fan cover 16 can also be divided axially into two parts in order to simplify service work at the fan 15 and / or the electronic accessory 13.

[0078] The drive 1 or the drive unit is essentially compact. The features described above and below can be used and combined individually or in any combination to design the drive 1. The compact drive 1 should also be cooled as optimally as possible.

[0079] For this purpose, at least one electronic accessory 13 or its components, such as one or more power semiconductors, chokes, capacitors, and control components, are axially mounted on the electric rotating machine 2. The components of the electronic accessory 13 are arranged in a closed housing arrangement of the electronic accessory 13, which is formed in sections by a cover 20.

[0080] The drive 1 and its corresponding sections / parts / components are cooled by one or more cooling units, which can be implemented as liquid cooling devices (at the housing arrangement 38 of the electric rotary machine 2 and / or as a cooling housing at the housing 10). Preferably, an air cooling device is provided, the fan 15 of which is located on the side of the housing arrangement facing away from the electric rotary machine 2, so that there is an axial sequence of the fan 15, the housing arrangement of the electronic accessory 13 and the electric rotary machine 2.

[0081] The fan 15 can also be designed as a fan unit consisting of one or more internal fans and / or external fans, which can also be at least partially integrated on or in the fan cover 16 .

[0082] To improve the cooling effect, surface enlargement measures are provided on the housing arrangement 38 and / or the housing 10 of the electric rotating machine 2. Additional heat sinks, ribs 21 or studs are provided there in the form of housing extensions, which can buffer thermal loads during the corresponding operation of the drive 1.

[0083] Furthermore, cooling channels are created by special designs or by recesses in the electric rotating machine 2 , in particular between its bearing shroud 14 and the housing arrangement 38 , which, due to corresponding designs and the primary air flow, create a Venturi effect in the recesses that contributes to cooling.

[0084] Here, the housing device 38 can also be designed in a funnel shape, wherein the funnel has a cylindrical section and an axially tapering section, and the cylindrical section and the axially tapering section can be formed in one piece from the same material, from multiple parts with different materials, or from multiple parts with the same material. In this case, the cover 20 forms the part of the funnel that tapers toward the fan 15.

[0085] In order to enlarge the surface of the housing device 38 , in particular the cover 20 , the cylindrical section and / or the axially tapering section can have axially or quasi-radially extending ribs on its outer side.

[0086] In order to achieve the funnel-shaped structure of the cover 20 , further bending angles may be provided between the edge circuit board 26 and the central circuit board 27 , if necessary.

[0087] The inner side of the cylindrical section and / or the axially tapering section is polygonal in shape so that the regulator component and / or the converter component can be arranged directly on the inner side of the housing device 38. This ensures a relatively good thermal connection.

[0088] In particular, the regulator or converter component can also be arranged solely in the cylindrical section; in this case, the axially tapering section acts as a heat sink, which has a thermal buffering effect. This section is then formed of solid material and simultaneously serves as a cover for the fan 15. This allows the use of an axially shorter fan 15, resulting in a more compact design for the drive.

[0089] It is also possible to provide one or more internal fans in the electronics enclosure 13, which form an internal cooling circuit within the closed electronics enclosure 13. The internal fans can be controlled separately as external fans depending on the temperature, or can be magnetically coupled to the shaft 9, so that the electronics enclosure 13 is self-ventilated as soon as the shaft 9 rotates.

[0090] The driving of the internal fan is achieved via magnetic coupling of a magnet positioned on the shaft 9 and a correspondingly arranged magnet within the electronic enclosure 13 (eg on the hub of the internal fan).

[0091] Alternatively, the internal fan can also draw its drive energy from the rotating magnetic field of the electric rotating machine 2 , in particular from its resonant vibrations.

[0092] The electrical drive energy for the internal fan can also be drawn directly from a regulator component or a converter component within the electronic accessory 13 .

[0093] In each embodiment, the internal fan is rotatably mounted in the stationary attachment 13 .

[0094] In this case, the actual temperature is determined in each case via a temperature model and / or one or more temperature sensors in the electric rotating machine 2 and / or the electronic accessory 13 .

[0095] If one of the two fans fails, redundant operation of the drive 1 can also be maintained at least temporarily by the fan 15 and the internal fan.

[0096] For regulation purposes, drive 1 can also include a regulation unit that receives data from various sensors, including temperature, vibration, and sound sensors. In drive 1, temperature sensors are located at relevant mounting points. Thus, temperature sensors are provided for the external air, the electronics 13, the power semiconductors in the electronics 13, one or more bearings 11 and 12, the winding system and / or winding heads 4, the interior of the machine 2, and also for the housing 10 and the surroundings.

[0097] Sensors provided in the drive 1 , i.e. the machine 2 and / or the electronic accessory 13 , are connected by wire or wirelessly to a regulating unit arranged in the electronic accessory unit 13 or at the housing 10 of the machine 2 , in particular in a junction box or in the machine 2 .

[0098] The vibration sensors are mounted on the shaft 9 and / or the bearings and / or the bearing cover and / or the housing 10. The sound sensors are primarily arranged at the sound source, ie, for example, at the ribs or the bearing cover 14. In addition, a rotational speed sensor is present for regulating the drive 1.

[0099] Based on all this data, the control unit also regulates or controls the speed of one or more external fans and / or the clock frequency of the converter. This means that if the external temperature is particularly high and / or the shaft 9 speed is low, the external fan is switched on depending on the temperature. The speed of the external fan 26 and thus the volume flow can also be controlled or regulated.

[0100] In this case, the actual temperature, preferably the actual temperature of the entire drive 1, is detected via one or more of the temperature sensors listed above. Additionally, it is possible to verify the detected values ​​via a temperature model or to determine the temperature of drive components that are not directly provided with sensors via a predefined algorithm stored in the control unit and / or in the cloud (e.g., via a digital twin).

[0101] This allows for energy-efficient operation of the drive 1 and also better planning of maintenance intervals for the drive 1 and its components, ie, for example, relubrication times for bearings.

[0102] The sensors are vibration sensors, temperature sensors, humidity sensors, etc. Advantageously, the sensors transmit their data to the control unit wired or via a wireless connection. The data are detected by direct contact or optically (eg infrared temperature measurement).

[0103] The control units of different drives 1 can also be in contact via the cloud and thereby exchange predeterminable data of their drives.

[0104] This results in a very compact and high-performance drive 1 that, based on the control unit, ensures thermally and / or energy-efficient operation of the drive 1. The control unit controls the clock frequency, control level, and / or control angle of the converter of the electronic accessory, as well as, for example, the speed of an external fan. This results in an optimal and controllable distribution of losses between the components of the electric machine 2 and the electronic accessory 13 with respect to the thermal limits and / or energy efficiency of the drive 1.

[0105] Therefore, thermally controllable or adjustable optimal operation of the drive 1 is also ensured with the help of the cooling unit, at least one basic cooling unit, the self-ventilation device 15 and / or the boost cooling unit, wherein the cooling unit, at least one basic cooling unit, the self-ventilation device and / or the boost cooling unit in particular cool components of the electric rotating machine 2, such as the stator and the rotor, and also the electronic accessories 13, such as power electronics and control electronics, control units, etc.

[0106] For example, a specific setting of the converter's clock frequency results in lower losses in the converter but increases losses in the electric machine 2. Conversely, a thermally favorable setting of the electric machine 2 can result in a greater thermal load on the converter. Depending on which of the subsystems of the drive 1 still have thermal reserves, the converter can be set accordingly via the control unit. Furthermore, the control unit can also intervene in the cooling by, for example, switching one or more external fans of the drive 1 on or off or operating them at a corresponding speed.

Claims

1. A method for producing a converter (13) for a drive having a regulator component and / or a converter component, the method comprising the following steps: - providing an arrangement of a plurality of circuit boards (26, 27), each of which has an electrical conductor track arranged thereon, the conductor tracks having electrical connections, wherein: The circuit board (27) has a centrally arranged opening (29) to allow the shaft (9) to pass through, - assembling the designed circuit boards (26, 27) with electrical and / or electronic components (30) provided for the circuit boards, -Electrical inspection of assembly, wiring, etc., - arranging a section (31) made of a material with good thermal conductivity on at least two circuit boards so that the section forms an almost circumferentially closed cover (20) by a bending process in the region of the electrical connection between the circuit boards, - Arranging a lid (36) at the open side of the cover (20) in order to obtain a closed housing arrangement (38).

2. The method for producing a converter (13) for a drive having a regulator component and / or a converter component according to claim 1, characterized in that The arrangement of the plurality of circuit boards (26, 27) is planar.

3. The method for producing a converter (13) for a drive having a regulator component and / or a converter component according to claim 1, characterized in that The circuit boards (26, 27) are arranged in a star shape.

4. The method for producing a converter (13) for a drive having a regulator component and / or a converter component according to claim 3, characterized in that By providing a central circuit board (27) and edge circuit boards (26) surrounding the central circuit board, the circuit boards (26, 27) are arranged in a star shape.

5. The method for producing a converter (13) for a drive having a regulator component and / or a converter component according to claim 4, characterized in that The edge circuit board (26) is electrically conductively connected to at least the central circuit board (27).

6. Method for producing a converter (13) for a drive having a regulator component and / or a converter component according to claim 5, characterized in that The electrically conductive connection is implemented as a rigid-flex connection.

7. Method for producing a converter (13) for a drive having a regulator component and / or a converter component according to any of the preceding claims, characterized in that Radial and / or axial connection options are provided in the cover (20).

8. Method for producing a converter (13) for a drive having a regulator component and / or a converter component according to claim 7, characterized in that The connection options are the segment (31) and / or the cover (36).

9. A method for producing a converter (13) for a drive having a regulator component and / or a converter component according to any one of claims 1 to 6, characterized in that: The segments (31) are mechanically connected to each other via connectors.

10. A converter (13) of a drive having a regulator component or a converter component, the regulator component or the converter component being arranged on a printed circuit board (26, 27), wherein: The circuit boards (26, 27) are arranged in a star shape, wherein the circuit boards have a central circuit board (27) and an edge circuit board (26) surrounding the central circuit board, and the edge circuit board (26) is electrically conductively connected to at least the central circuit board (27). The circumferential cover (20) consists of at least two sections (31), which are made of a material with good thermal conductivity. wherein each segment (31) is in direct thermal contact with at least one edge circuit board (26), wherein the central circuit board (27) has a centrally arranged opening (29) to allow the shaft (9) to pass through, At least one edge circuit board (26) is bent at a predetermined angle at a bending section (28) relative to the central circuit board (27).

11. A converter (13) of a drive having a regulator component or a converter component according to claim 10, characterized in that The electrically conductive connection between the edge circuit board (26) and the central circuit board (27) is a rigid-flex connection.

12. A converter (13) of a drive having a regulator component or a converter component according to claim 10 or 11, characterized in that Essentially axially extending cooling ribs (21) are provided.

13. The converter according to claim 12, characterized in that Essentially axially extending cooling ribs (21) are provided at the radial outer boundary of the cover (20).

14. A driver (1) having: - at least one electric rotating machine (2); - at least one converter (13) according to any one of claims 10 to 13; - at least one cooling unit (15); -in, The components of the drive (1) are arranged axially in sequence so that the electronic accessories are arranged axially between the electric rotating machine (2) and the cooling unit (15); - wherein the converter (13) is cooled by a cooling air flow.

15. The drive (1) according to claim 14, characterized in that The cooling ribs (21) of the cover (20) and the cooling ribs of the housing (10) are axially aligned.

16. The drive (1) according to claim 15, characterized in that The cooling unit (15) is configured as a fan unit that generates a cooling air flow when the electric rotating machine (2) is in operation. The cooling air flow at least partially passes through the cover (20) and the electric rotating machine (2).

17. The drive (1) according to claim 16, characterized in that A fan cover (16) serves as a guide for the cooling air flow, which extends from the bearing side over up to 30% of the axial length of the housing (10) of the electric rotating machine (2).

18. Drive (1) according to claim 14 or 15, characterized in that The cover (36) of the cover (20) and the electronic accessories have cutouts in the region of the shaft in order to enable self-ventilation of the drive (1).

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