Adapter for contacting a converter unit integrated into a housing

Abstract

The invention relates to an electric machine (10), in particular a three-phase asynchronous machine or a three-phase synchronous machine, and to a method for assembling an electric machine (10). The machine comprises a stator (2) having winding lines (22), the ends of which open into plug-in contacting units (12) accommodated in an adapter (1) which is integrated into the housing. Furthermore, the machine contains a converter unit (3) which is integrated into the housing, in particular a converter unit (3) which is integrated into the bearing shield, the converter unit having corresponding plug-in contacting counter-pieces (13). A method for producing said electric machine (10) is specified in which the ends of the winding lines (22) of the stator (2) are first attached to the plug-in contacting units (12) in the adapter (1). The stator (2), together with the adapter (1), is then inserted or pressed axially into the housing (5). The converter unit (3), together with the plug-in contacting counter-pieces (13), is then pushed axially into the housing (5) until the end position thereof is reached, in which the plug-in contacting units (12) and the plug-in contacting counter-pieces (13) are joined together such that the stator (2) and the converter unit (3) are contacted.

Description

[0001] 202415101

[0002] 1

[0003] Description

[0004] Adapter for connecting a housing-integrated inverter unit

[0005] The present invention relates to an electric machine, in particular a three-phase asynchronous or a three-phase synchronous machine, and a method for assembling an electric machine.

[0006] State of the art

[0007] Currently, the stator winding of an electric machine, such as three-phase asynchronous and three-phase synchronous motors, is connected to connecting leads, typically with cable lugs at the ends, using various contact methods such as crimping, soldering, or welding. These connecting leads are then manually fed through an opening in the housing to a terminal block in the junction box for connection to the necessary power supply.

[0008] For variable-speed dynamoelectric machines, such as electric motors, especially synchronous, asynchronous, and reluctance motors, frequency converters are needed to adjust the desired speed.

[0009] In decentralized inverter designs, particularly those mounted on walls in control cabinets, the connection between the inverter and motor is made via a separate cable to the terminal block. In contrast, with so-called integrated inverter designs, the connecting cables are routed directly through the housing opening to the inverter. In these solutions, previously referred to as integrated inverters, the inverter units are mounted onto an opening in the housing of the electric machine. Alternatively, they are referred to as motor-mounted inverters. Here, too, the connecting cables are usually routed manually. This approach results in high installation costs, especially for smaller units, and compromises the compactness of the drive system.

[0010] Additional wires for thermal monitoring or other components are also manually routed through the housing opening, further increasing the manual effort. These methods require the use of ferrules and connections via terminal blocks or cage clamp contacts, which also increases complexity and cost. 202415101

[0011] 2

[0012] Up to now, as illustrated in Figure 2, the power supply, signal lines, and inverter connections have been made on a terminal block in the terminal box on the motor housing. This mounting method directly on the housing requires a lot of installation space and makes the drive comparatively large and heavy.

[0013] Furthermore, existing solutions limit the modularity and interchangeability of drive systems and lead to increased space requirements and manual effort when connecting components. Another disadvantage of existing methods is the need to connect each component individually, which is both time-consuming and prone to errors. Alternative materials or contact designs have so far been rarely used, as existing methods are based on industry standards and established practices.

[0014] Approaches where the motor and inverter are arranged axially one behind the other are known, for example, from EP 0 854 560 A1. However, current designs with inverters mounted directly on the motor require considerable installation space because the bearing is located between the motor and the inverter. This makes the drive comparatively large and heavy.

[0015] For example, DE 10 2004 031 399 A1 discloses a converter motor with a self-ventilated electric motor and a frequency converter, wherein components of the frequency converter are arranged at the bottom of a cup-shaped end shield. This drive also requires a comparatively large amount of installation space.

[0016] Consequently, it is technically necessary to propose an improved solution that avoids the disadvantages known from the prior art. In particular, the proposed solution should enable increased compactness while simultaneously simplifying assembly.

[0017] The problems underlying the present invention are solved by an electric machine according to claim 1. The problem relating to assembly is solved by a manufacturing method according to claim 10. Advantages and embodiments of the invention, which can be used individually or in combination, are the subject of the dependent claims. 202415101

[0018] 3

[0019] Description of the invention

[0020] The electrical machine according to the invention, in particular a three-phase asynchronous or three-phase synchronous machine, is housed in a casing. The electrical machine comprises a stator with winding leads, the ends of which terminate in plug-in connectors in a casing-integrated adapter. Furthermore, a casing-integrated converter unit is provided, in particular a bearing-shield-integrated converter unit, which has plug-in connector counterparts.

[0021] The advantages lie firstly in the structural flexibility. The use of plug connectors instead of terminals allows for very simple assembly of the stator and inverter within the housing. Another advantage is the increased stability. The joining properties of both the stator and inverter units can be optimized. The adapter enables a reduction to essentially these two components within the housing.

[0022] The terms plug-in unit and plug-in counterpart refer specifically to plugs and sockets, whereby the plug and socket may also be reversed. Stator line ends can terminate in plugs and the sockets can be integrated into the inverter unit, or vice versa. As an alternative to plug-in contacts, other suitable contacts, especially spring contacts, can also be used.

[0023] A housing-integrated inverter unit means that the inverter or individual inverter components are located inside the housing. This ensures that the electrical connection is also made inside the housing and does not extend beyond it. It could also be referred to as a (motor) interior-positioned inverter unit. To integrate an inverter unit into the housing, it can be attached, in particular, to the inner wall of the housing. A bearing shield-integrated inverter unit, as proposed, for example, in EP 24199792.3 or EP 24200040.4, is particularly advantageous. A combined solution, in which the inverter unit is partially integrated into the housing and partially into the bearing shield, is also conceivable. Such embodiments of a housing-integrated inverter unit can serve as a basis for the adapter solution proposed here. 202415101

[0024] 4

[0025] A housing is understood to be the enclosure of the electrical machine, which in particular provides cooling elements, fastening elements and the routing of the power lines.

[0026] A further advantage is the provision of a solution to the challenge of space utilization. Round inverter designs are particularly preferred. Preferred diameters depend on the stator diameter, which can be approximately 10 cm to 15 cm. The proposed solution may also be of interest for other power classes. In particular, the proposed solution is used in three-phase asynchronous or three-phase synchronous machines with power ratings of 1 kW to 15 kW and shaft heights of 80 mm to 160 mm. The solution can also be used in motors with power ratings up to 90 kW and shaft heights up to 280 mm.

[0027] An advantageous application of the invention is possible, for example, in a drive system comprising at least one dynamoelectric rotary machine arranged in a housing, with a winding system arranged in a stator and a rotor separated from it by an air gap, which is rotatably mounted about an axis via at least one bearing of a cup-shaped end shield. The stator and rotor are located within a motor housing. Preferably, this includes an inverter comprising at least some of the following components, such as power semiconductors, inductors, capacitors, control and regulation units, and communication units, and located in an inverter housing that is radially surrounded, at least partially, by the end shield. Some components of the inverter are thermally connected to the end shield, in particular by arranging heat-intensive components of the inverter on an inner side wall of the cup-shaped end shield.Preferably, the inverter is arranged axially between the dynamo-electric rotary machine and the bearing of the cup-shaped end shield. The motor interior and the inverter installation space are separated, in particular, by a shielding element.

[0028] In an advantageous embodiment of the electric machine according to the invention, the stator is inserted or pressed into the housing. This has the advantage that a suitable fit of the stator into the housing is created, which provides a comparatively good heat transfer from the stator's laminated core to the housing and optional housing fins.

[0029] In a further advantageous embodiment of the electrical machine according to the invention, the adapter provides connections for the power lines towards the housing opening. In particular- 202415101

[0030] 5. The adapter also provides connections for additional signal lines towards the housing opening. This has the advantage that the customer only needs to connect the power lines, as shown in Figure 2 with reference numeral 41, and optionally the signal lines, once. A separate connection for the motor and inverter is no longer necessary on the customer's side.

[0031] In a further advantageous embodiment of the electrical machine according to the invention, the adapter has at least one fixing geometry by means of which the adapter is fixed to the stator and / or at least one fixing geometry by means of which the adapter is fixed to the inside of the housing.

[0032] In a further advantageous embodiment of the electric machine according to the invention, the bearing shield-integrated converter unit has a recess in which the plug-in contact counterparts are mounted. This has a positive effect on assembly and stability. Alternatively, the converter-side plug-in part could be mounted onto the converter. In that case, the recess would be a structure similar to a second adapter, which is mounted on the end face of the converter and forms the counterpart to the stator-side adapter.

[0033] In a further advantageous embodiment of the electrical machine according to the invention, the adapter is inserted or pressed into the recess in the inverter unit. This has the advantage that a corresponding fit of the adapter into the inverter is created, thereby simplifying assembly and ensuring stability for the contacts. In a further advantageous embodiment of the electrical machine according to the invention, the plug-in contact units have sockets, in particular plastic sockets, and the plug-in counterparts have pins, in particular copper pins, or the plug-in contact units have pins, in particular copper pins, and the plug-in counterparts have sockets, in particular plastic sockets.

[0034] The stator leads are therefore not equipped with the usual contact materials, such as cable lugs or ferrules. However, contact within the socket or plug can preferably be made using standard technologies such as crimping, plugging, cage clamping, etc.

[0035] In a further advantageous embodiment of the electrical machine according to the invention, further conductor ends, in particular conductor ends of thermocouples and / or other components, terminate at the terminals.

[0036] 6 components, in plug-in contact units. These can then also be made accessible via the adapter for plug-in contact.

[0037] In a further advantageous embodiment of the electric machine according to the invention, the inverter unit is connected to the stator, which is inserted or pressed into the housing, by assembling plug-in connector units and their corresponding plug-in counterparts. Advantageously, the plug-in connector units and their corresponding plug-in counterparts are identical in their position and, for example, also in their number. Once the inverter has reached its final position in the housing, all sockets and plugs of the stator adapter and inverter are inserted into each other. This simplifies and compacts both the design and the assembly.

[0038] The adapter's mounting is particularly advantageous because it is designed to compensate for any relative movements between the stator and inverter, thus preventing contact interruption. This provides additional stabilization of the contact and increases its reliability and lifespan.

[0039] The manufacturing method according to the invention for an electric machine comprises the following assembly steps: attaching the leads of the winding leads of a stator to plug-in contact units in an adapter, axially inserting or pressing the stator with the adapter into a housing, and axially sliding a converter unit with plug-in counterparts into the housing to an end position of the converter unit, in which end position plug-in contact units and plug-in counterparts are joined together in such a way that the stator and converter unit are contacted.

[0040] This method offers the advantage that the axial mounting of the inverter in the housing is simultaneously used for contacting. Assembly is simplified and can be automated.

[0041] Another advantage is that proven assembly methods such as press-fitting or insertion can be used. This preserves established processes. Furthermore, the number of components is reduced.

[0042] Press-fitting has the additional advantage of ensuring excellent thermal conductivity to the housing. Furthermore, all proposed mounting and fixing mechanisms are mechanical in nature. Most of them are detachable connections, which are advantageous for repair and disassembly. 202415101

[0043] 7

[0044] In a further advantageous embodiment of the method according to the invention, the wire ends of the stator winding leads are attached to the plug-in contact units by crimping, plugging, or cage clamping. Conventional contacting methods can be used at the wire ends before the stator is inserted into the housing. This ensures good access to the wire ends. In a first step, the stator winding leads and, optionally, the sensor leads are contacted in the adapter. This is done outside the motor, particularly at the usual switching workstations. The adapter is therefore either loosely attached to the wire ends, fixed to the stator winding head, or fixed to the inner wall of the housing.

[0045] In a further advantageous embodiment of the method according to the invention, an additional assembly step is performed, involving the attachment of further stator conductor ends to plug-in contact units, in particular conductor ends of temperature sensors and / or attachments. This solution differs from known methods requiring manual wiring and assembly by introducing a single-step process that improves assembly efficiency and the compactness of the overall system.

[0046] In a further advantageous embodiment of the method according to the invention, after attaching the leads of the stator windings to the plug-in contact units in the adapter, the adapter is fixed to the stator by means of at least one fixing geometry. Alternatively, for example, after inserting the stator into the housing, the adapter is inserted into the housing opening on the inside of the motor and fixed in place. Subsequently, the inverter unit is inserted into the housing.

[0047] In a further advantageous embodiment of the method according to the invention, during or after the axial insertion or pressing of the stator with the adapter into the housing, the adapter is fixed to the inside of the housing by means of at least one fixing geometry. Fixing geometries can be designed as receptacles, in particular recesses or protrusions, into which a corresponding counterpart is inserted or pressed. Fixing geometries can also be designed as bulges, in particular lugs, onto which a corresponding counterpart is pushed or pressed.

[0048] In a further advantageous embodiment of the method according to the invention, when the inverter unit with plug-in contact counterparts is axially inserted into the housing, the adapters are inserted or pressed into a recess in the inverter unit. 202415101

[0049] 8

[0050] In particular, at least one of the assembly steps is carried out semi-automatically or automatically. By creating the plug-in interface in the form of the adapter according to the invention, the assembly, especially the contacting step, is greatly simplified and thus automatable.

[0051] The inverter connection points are conveniently located in the same position as the terminals of the contact adapter, meaning they are automatically connected when the inverter is inserted into the adapter. This establishes the connection between the stator and the inverter. The adapter handles the wiring of the stator connection leads and inverter inputs with the power leads, as well as the connection of the signal leads for both the stator and the inverter. The adapter thus provides the central connection between the stator / motor and the inverter within the motor housing. Therefore, external connections in the terminal block area, as is typically used (see Figure 2), are unnecessary. Consequently, the customer only needs to make the connections for the power leads and, optionally, the signal leads once. A separate connection between the motor and inverter is therefore no longer required.

[0052] The proposed solution has the potential to significantly improve the efficiency and cost-effectiveness of assembling electric drive systems. By integrating the adapter, it could be incorporated into existing and new motor-inverter combinations, reducing space requirements and increasing interchangeability. Furthermore, the solution leads to a significant reduction in assembly costs and simplified maintenance. The increased compactness of the drive system facilitates installation in smaller machines. The interchangeability of the components also results in reduced downtime and lower maintenance costs.

[0053] Character description

[0054] Examples and embodiments of the present invention are further described by way of example with reference to Figures 1 to 6 of the attached drawing. In the exemplary embodiments and figures, identical or equivalently functioning elements may be provided with the same reference numerals. The depicted elements and their relative sizes are generally not to be considered to scale; rather, individual elements may be shown proportionally larger for better clarity and / or understanding. 202415101

[0055] 9

[0056] Although the invention is illustrated and described in detail by the preferred embodiment, it is not limited by the disclosed examples. Variations thereof can be derived by a person skilled in the art without departing from the scope of protection of the invention as defined by the claims.

[0057] The drawing shows schematically:

[0058] Figure 1 shows an electric machine 10, in particular a motor, with a motor-mounted inverter in a terminal box 40; Figure 2 shows a prior art connection of a power line 41, signal and inverter connections on a terminal block on a housing 5; Figure 3 shows a section through an electric machine 10 according to the invention, in which a housing-integrated inverter unit 3 contacts the stator lines 22 by means of an adapter 1; Figure 4 shows the adapter 1 in an enlarged detail from Figure 3; Figure 5 shows a partial perspective view of the components stator 2 and inverter unit.

[0059] 3 and adapter 1 along their mounting axis and in Figure 6 a top view Z of the connection side of the inverter unit 3 and the plug-in contact counterparts 13.

[0060] Figure 1 shows a perspective view of the exterior of an electric machine 10 in a housing 5, with a bearing receptacle at the base of the end shield 7. The shaft 6 protrudes from the housing 5 on both sides. On the stator side (see Figure 3), the driven machine, such as a compressor or pump, is connected to the shaft 6. On the end shield 7 side, modular attachments such as a brake unit, external fan module, or a encoder / rotary encoder can be mounted. Cooling fins 51 are shown on the outer wall of the housing. The terminal box 40 is shown smaller than required for conventional terminal boards (see Figure 2). By using the solution proposed according to the invention, the terminal box 40 can be reduced in size even further, to the point of being completely unnecessary.

[0061] Figure 2 shows a prior art connection of a power line 41, signal and converter connections on a terminal block, as is customary, mounted externally on a housing 5. For the electrical connection of electrical machines 10, for example electric motors, connecting leads 202415101 are attached to the ends of the winding phases.

[0062] 10

[0063] 22 electrically contacted. The proposed solution is particularly interesting for three-phase asynchronous and three-phase synchronous motors. Contact is made using methods such as crimping, soldering, or welding. Cable lugs are typically found at the ends of the connecting leads 41. These leads are currently fed manually through a housing opening, usually onto the terminal block in the junction box 40, to provide user-friendly access to the connections for the customer.

[0064] In decentralized, so-called wall-mounted inverter designs, the connection between inverter 3 and stator 2 is made via a supply line to the terminal block. In integrated, so-called surface-mounted or motor-mounted inverter designs, as shown, for example, in Figure 2, the connecting lines 41 are currently routed directly to the inverter 3 through the housing opening. The connecting lines for the mains voltage 41 are usually fitted with ferrules, and contact is made using terminal blocks or cage clamp contacts.

[0065] In addition to the voltage connection leads 41, there is the option of further leads 46, 47, for example for thermal motor monitoring 46 or other components, such as a standstill heater, which can also be manually routed through the housing opening into the terminal box 40 or directly into the motor-mounted inverter 3. Connections in the terminal box 40 are usually made via terminal blocks.

[0066] Furthermore, Figure 2 shows connections for the motor 42, connections for digital inputs and outputs 43, connections for a 24 volt power supply 44, switched / unswitched, connections for DIP switches 45 (Dual In-line Package switches), connections for motor temperature sensor 46, connections for a braking resistor 47 and connections for an EM brake 48, for example 180 V.

[0067] The proposed solution advantageously avoids the previously considerable manual effort of routing the stator leads and additional leads from the winding through the housing opening, and therefore reduces the previously disproportionately high assembly costs, especially for smaller sizes.

[0068] Figure 3 shows a section through an electric machine 10 according to the invention, in which a converter unit 3 contacts the stator leads 22 by means of an adapter 1. 202415101

[0069] 11

[0070] The proposed solution is based on an inverter 3 integrated within the motor or housing. The inverter 3 is, for example, mounted axially behind the stator 2 with winding 21 in the housing 5 or integrated into the end shield 7. A combined solution, where the inverter unit 3 is positioned partly in the housing 5 and partly in the end shield 7, is also conceivable. Figure 3 shows a stator 2 with stator leads 22 and plug-in connector units 12 mounted on them. The stator 2 is connected to the inverter unit 3 within the housing 5. The inverter unit 3 has corresponding plug-in connectors 13 for this purpose. The core of the proposed solution is an adapter 1, particularly in a compact form, in which the plug-in connector units 12 are located and which includes the stator connection leads 22 and optionally additional control and / or sensor leads.Furthermore, adapter 1 is designed to accommodate, connect, and wire the inverter terminals 13. Adapter 1 is located inside the motor, specifically in or below the housing opening to the terminal box 40, as shown in Figure 1. Figure 4 shows an enlarged view of the adapter section from Figure 3.

[0071] During assembly, the first step involves connecting the stator leads 22 of the winding 21 and the sensors to the adapter 1. This is conveniently done outside the housing 5 at the usual switching workstations. The adapter 1 is therefore either loosely attached to the leads or fixed to the end face of the stator winding head 21. After the stator 2 is inserted into the housing 5, the contact adapter 1 is fixed inside the housing 5. The inverter 3, integrated within the housing, is then inserted into the housing 5. The inverter connection areas 13 are located in the same position as the connections of the contact adapter 12, meaning they are plugged in when the inverter 3 is inserted into this adapter 1. This establishes the connection between the stator 2 and the inverter 3.The connection of stator connection leads 22 and inverter inputs 13 with the power lines and, depending on the embodiment, also the connection of the signal lines of stator 2 and inverter 3 is implemented in the adapter 1. The adapter 1 thus handles the central contacting within the motor housing of stator 2 and inverter 3. Therefore, a complex routing of the contacts out of the housing 5 is unnecessary. On the customer's side, only the connections for the power lines 41 are required. Separate wiring is eliminated, thereby minimizing the space required in the connection area.

[0072] The proposed solution introduces an adapter 1 in the form of a plug-in connector unit inside the motor, which directly establishes the connection between the stator connection leads 22 and the inverter 3. This also reduces assembly costs and increases the compactness of the drive system. 202415101

[0073] 12

[0074] Figure 5 shows a partial perspective view of the components stator 2, converter unit 3, and adapter 1 along their mounting axis. Figure 6 shows a top view Z of the connection side of the converter unit 3 and the plug-in connectors 13, as indicated by arrow Z in Figure 5.

[0075] The key advantage of the proposed solution lies in combining the contacting and wiring of the stator and inverter connections into a single process step and an adapter component 1. Inserting the inverter 3 into the housing 5 automatically establishes the contact, eliminating the need to connect the inverter 3 outside the motor compartment 5. The customer only needs to connect the three power lines 41 and, depending on the application, signal and / or control lines. The effort required to connect the adapter 1 to the stator 2 is virtually identical to the standard process of clamping wires or attaching cable lugs.

[0076] Another advantage is that the stator leads 22 no longer need to exit the housing, resulting in a significant reduction in installation space in the connection area. This eliminates the need for additional components such as an auxiliary terminal box and its installation. In summary, the proposed solution offers advantages in terms of contacting and assembly, as these are performed in a single process step. The solution reduces costs by minimizing the number of process steps. Additional components, such as an auxiliary terminal block, are no longer required, resulting in further cost savings. Manual handling of the leads, such as cable routing and connection work in the terminal box, is reduced. For the customer, the connection process becomes simpler and faster.

[0077] An electric machine 10, in particular a three-phase asynchronous or a three-phase synchronous machine, and a method for assembling an electric machine 10 are proposed. This machine comprises a stator 2 with winding leads 22, the ends of which terminate in plug-in terminal units 12 housed in a housing-integrated adapter 1. Furthermore, the machine includes a housing-integrated converter unit 3, in particular a converter unit 3 integrated in the end shield, which has corresponding plug-in terminal counterparts 13. A manufacturing method for this electric machine 10 is specified, in which the leads of the winding leads 22 of the stator 2 are first attached to the plug-in terminal units 12 in the adapter 1. Subsequently, the stator 2 with the adapter 1 is axially inserted or mounted in the housing 5.

[0078] 13 presses and the adapter is fixed to the stator end face or to the inner wall of the housing. Then the inverter unit 3 with the plug-in connectors 13 is inserted axially into the housing 5 until a final position is reached in which the plug-in connector units 12 and the plug-in connectors 13 are joined together so that the stator 2 and the inverter unit 3 are in contact.

[0079] 202415101

[0080] 14

[0081] Reference symbol list

[0082] 10 electric machine

[0083] 1 adapter

[0084] 11 Adapter slot

[0085] 14 fixing geometries

[0086] 2 Stator

[0087] 21 Winding system, or stator winding head of the winding system

[0088] 22 stator leads

[0089] 12 plug-in contact units, for example sockets

[0090] 3 converter unit

[0091] 13 mating connectors, for example plug contacts (pins)

[0092] 40 terminal box, housing opening

[0093] 5 (engine housing)

[0094] 51 cooling fins

[0095] 6 wave

[0096] 7 Storage sign

[0097] 41 connections mains voltage

[0098] 42 connections motor

[0099] 43 connections Digital inputs / outputs

[0100] 44 power supply connections

[0101] 45 DIP switches

[0102] 46 connections temperature sensor

[0103] 47 connections brake resistor

[0104] 48 connections EM brake

Claims

202415101 15 Patent claims 1. Electric machine (10), in particular a three-phase asynchronous or three-phase synchronous machine, in a housing (5) comprising a stator (2) comprising winding lines (22) whose line ends terminate in plug-in contact units (12) in a housing-integrated adapter (1), a housing-integrated converter unit (3), in particular a bearing shield-integrated converter unit (3) which has plug-in contact counterparts (13).

2. Electric machine (10) according to claim 1, wherein the stator (2) is inserted or pressed into the housing (5).

3. Electric machine (10) according to claim 1 or 2, wherein the adapter (1) provides connections for the power lines (41) towards the housing opening (40).

4. Electric machine (10) according to one of the preceding claims, wherein the adapter (1) has at least one fixing geometry (14) by means of which the adapter is attached to the stator (2) is fixed and / or wherein the adapter (1) has at least one fixing geometry (14) by means of which the adapter is fixed to the housing (5) on the inside of the housing.

5. Electric machine (10) according to one of the preceding claims, wherein the bearing shield integrated converter unit (3) has a recess (11) in which the plug-in contact counterparts (13) are mounted.

6. Electric machine (10) according to one of the preceding claims, wherein the adapter (1) is inserted or pressed into the recess (11) in the converter unit (3).

7. Electric machine (10) according to one of the preceding claims, wherein the plug-in contact units (12) have sockets, in particular plastic sockets, and the plug-in contact counterparts (13) have pins, in particular copper pins, or the plug-in contact units (12) have pins, in particular copper pins, and the plug-in contact counterparts (13) have sockets, in particular plastic sockets.

8. Electric machine (10) according to one of the preceding claims, wherein further conductor ends terminate in plug-in contact units (12), in particular conductor ends of thermosensors and / or attachment elements. 202415101 16 9. Electric machine (10) according to one of the preceding claims, wherein the converter unit (3) is connected to the stator (2) inserted or pressed into the housing (5) by joining plug-in contact units (12) and plug-in counterparts (13).

10. Manufacturing method for an electric machine (10) according to one of the preceding claims, comprising the assembly steps: Attaching the leads of the winding leads (22) of a stator (2) to plug-in terminal units (12) in an adapter (1), Axial insertion or pressing of the stator (2) with the adapter (1) into a housing (5), Axial insertion of an inverter unit (3) with plug-in contact counterparts (13) into the housing (5) to an end position of the inverter unit (3), in which end position plug-in contact units (12) and plug-in contact counterparts (13) are joined together such that the stator (2) and inverter unit (3) are contacted.

11. Manufacturing method according to claim 10, wherein the attachment of the conductor ends of the winding conductors (22) of the stator (2) to the plug-in contact units (12) is carried out by crimping, plugging or cage clamping.

12. Manufacturing method according to claim 10 or 11, wherein the assembly step of attaching further conductor ends of the stator (2) to plug-in contact units (12) is additionally carried out, in particular conductor ends of thermosensors and / or attachment elements.

13. Manufacturing method according to one of claims 10 to 12, wherein after attaching the leads of the winding leads (22) of the stator (2) to the plug contact units (12) in the adapter (1), the adapter (1) is fixed to the stator (2) by means of at least one fixing geometry (14).

14. Manufacturing method according to one of claims 10 to 13, wherein during or after the axial insertion or pressing of the stator (2) with the adapter (1) into the housing (5), the adapter (1) is fixed to the inside of the housing (5) by means of at least one fixing geometry (14). 202415101 17 15. Manufacturing method according to one of claims 10 to 14, wherein, when the converter unit (3) with plug-in contact counterparts (13) is axially inserted into the housing (5), the adapter (1) is inserted or pressed into a recess (11) in the converter unit (3).

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