Drive device comprising an electric machine and an inverter, and motor vehicle
阅读说明:本技术 包括电机和变换器的驱动装置以及机动车 (Drive device comprising an electric machine and an inverter, and motor vehicle ) 是由 B·泽恩勒 S·维特 于 2020-04-22 设计创作,主要内容包括:一种特别是用于机动车的驱动装置,其包括电机和变换器,其中电机具有至少一个导电的电机接触元件用于与变换器的相应的导电的变换器接触元件电接触,其中电机接触元件直接或通过电机密封部件保持在电机的电机壳体的电机壳体组件上以及变换器接触元件直接或通过变换器密封部件保持在变换器的变换器壳体的变换器壳体组件上,电机接触元件和变换器接触元件通过紧固部件彼此机械地固定,紧固部件以及电机接触元件的相应的位于壳体外的部段和变换器接触元件的相应的位于壳体外的部段容纳在流体密封的容纳空间中,该容纳空间至少部分由变换器壳体组件和电机壳体组件形成。(A drive device, in particular for a motor vehicle, comprising an electric machine and an inverter, wherein the electric machine has at least one electrically conductive machine contact element for electrically contacting a corresponding electrically conductive inverter contact element of the inverter, wherein the motor contact element is held on a motor housing assembly of a motor housing of the motor and the converter contact element is held on a converter housing assembly of a converter housing of the converter directly or via a motor sealing member, the motor contact element and the converter contact element being mechanically fixed to each other by a fastening member, the fastening member and a respective section of the motor contact element located outside the housing and a respective section of the converter contact element located outside the housing being accommodated in a fluid-tight accommodation space, which is formed at least in part by the converter housing assembly and the motor housing assembly.)
1. A drive device, in particular for a motor vehicle (1), comprising an electric machine (2) and a converter (4), wherein the electric machine (2) has at least one electrically conductive machine contact element (7) for electrically contacting a corresponding electrically conductive converter contact element (6) of the converter (4), characterized in that the machine contact element (7) is held directly or by means of a machine seal (16) on a machine housing assembly (13) of a machine housing (14) of the electric machine (2) and the converter contact element (6) is held directly or by means of a converter seal (11) on a converter housing assembly (8) of a converter housing (9) of the converter (4), the machine contact element (7) and the converter contact element (6) being mechanically fixed to one another by means of a fastening means (21), wherein the fastening means (21) and a corresponding section of the machine contact element (7) located outside the housing and the converter contact element (6 6) Is accommodated in a fluid-tight accommodation space (26) which is formed at least in part by the converter housing assembly (8) and the motor housing assembly (13).
2. Drive arrangement according to claim 1, characterized in that the motor contact element (7) is enclosed by the motor housing assembly (13) or by the motor housing assembly (13) and the motor sealing part (16) in such a way that the motor housing (14) is fluid-tightly closed at least in the region of the motor contact element (7) and/or the converter contact element (6) is enclosed by the converter housing assembly (8) or by the converter housing assembly (8) and the converter sealing part (11) in such a way that the converter housing (9) is fluid-tightly closed at least in the region of the converter contact element (6).
3. Drive arrangement according to claim 1 or 2, characterized in that the converter housing (9) and/or the motor housing (14) are fluid-tightly closed.
4. Drive arrangement according to any one of the preceding claims, characterized in that the motor contact element (7) or the converter contact element (6) has an opening (17), through which opening (17) the fastening part (21) extends.
5. Drive arrangement according to claim 4, characterized in that the fastening member (21) is a screw which engages into a thread (25) formed by the converter contact element (6) or the motor contact element (7).
6. Drive arrangement according to claim 4 or 5, characterized in that an accommodation space sealing member (19) is arranged between the motor housing assembly (13) and the converter housing assembly (8) in order to fluid-tightly close the fluid-tight accommodation space (26) on the side of the opening (17) of the motor contact element (7) facing the converter contact element (6) or on the side of the opening (17) of the converter contact element (6) facing the motor contact element (7).
7. Drive arrangement according to one of claims 4 to 6, characterized in that the drive arrangement has a closure element (22) which is connected directly or via a closure sealing part (20) to the motor housing assembly (13) or the converter housing assembly (8) in order to close the fluid-tight receiving space (26) in a fluid-tight manner on the side of the opening (17) of the motor contact element (7) facing away from the converter contact element (6) or on the side of the opening (17) of the converter contact element (6) facing away from the motor contact element (7).
8. Drive device according to claim 7, characterized in that the motor housing assembly (13) or the converter housing assembly (8) forms at least one spacer (18) on which the closing element (22) is placed directly or via a closing seal (20), which at least one spacer spaces the closing element (22) from the opening (17).
9. Drive arrangement according to one of the preceding claims, characterized in that the motor housing assembly (13) is connected to a further motor housing assembly (12) by means of a motor housing seal (15) and/or the inverter housing assembly (8) is connected to a further inverter housing assembly (24) by means of an inverter housing seal (10).
10. Motor vehicle, characterized in that it comprises a drive device (29) according to any one of the preceding claims.
Technical Field
The invention relates to a drive device, in particular for a motor vehicle, comprising an electric machine and an inverter, wherein the electric machine comprises at least one electrically conductive machine contact element for making electrical contact with a corresponding electrically conductive inverter contact element of the inverter. The invention also relates to a motor vehicle.
Background
Inverters are generally used for supplying electrical machines, in particular high-power electrical machines which can be used, for example, as drive motors in motor vehicles, in order to provide an alternating voltage for operating the electrical machines. Such converters can be supplied, for example, in a motor vehicle via the direct current network of the motor vehicle or via the vehicle battery. Here, it is often advantageous to first design the converter and the electric machine as separate components. However, since high power can be provided by the electrical connection between the converter and the electric machine, reliable contact protection and protection against environmental influences, for example against the ingress of liquids, should be achieved for such a connection.
For this purpose, it is common practice to use a sealed space, also referred to as a junction box, through which the motor, which is not separately sealed, is connected to the inverter, which is not separately sealed. In this case, however, the pressure equalization or medium exchange between the converter and the electric machine can take place via the terminal box, whereby, for example, cooling medium, oil or other contaminants are exchanged via the terminal box. In addition, the result is that relatively large components, including the motor and inverter, must be sealed. This may require complex designs or severely limit the allowed tolerances.
The publication DE 102014213973 a1 proposes a connection arrangement for the mechanical elastic electrical connection of two high-voltage components, for example an electric machine and a controller, in a vehicle. The components are connected by a high-voltage cable arrangement and a low-voltage cable arrangement, which together are surrounded by an elastically bendable sheath. The sheath may be hermetically coupled to at least one of the housings of the high-voltage assembly to enable prevention of fluid infiltration into the interior of the sheath. The housing of the high-pressure assembly is preferably gas-tight. The problem here is that the application and gas-tight mounting of the common sheathing on the housing is relatively complicated and, if necessary, is to be completely automated at great expense.
Disclosure of Invention
The object of the invention is therefore to seal the electrical contact area between the electric machine and the converter with little technical effort in order to prevent liquid ingress.
This object is achieved by a drive device of the type mentioned at the outset in that the motor contact element is held directly or by means of a motor sealing part on a motor housing assembly of a motor housing of the motor and the converter contact element is held directly or by means of a converter sealing part on a converter housing assembly of a converter housing of the converter, the motor contact element and the converter contact element being mechanically fixed to one another by means of a fastening part, wherein the fastening part and the respective section of the motor contact element located outside the housing and the respective section of the converter contact element located outside the housing are accommodated in a fluid-tight accommodation space which is formed at least in part by the converter housing assembly and the motor housing assembly.
It is therefore proposed that the receiving space is sealed off from the liquid at least in part by the assembly of the housing of the electric machine and of the inverter. Since the motor contact element and the converter contact element are fixed to one another without additional cable connections, a very compact construction can be achieved in particular and the receiving space can thus be sealed in a simple manner in a few operating steps.
The converter may in particular be a pulse width modulated inverter. For example, a pulse width modulation controlled three-phase bridge converter may be used. If the converter provides a multi-phase voltage for the motor, a plurality of pairs of motor contact elements and converter contact elements can be used for this purpose, wherein one phase is conducted on each of these pairs. In this case, a separate receiving space can be provided for each pair of motor contact element and converter contact element. Alternatively, however, it is also possible to form a common receiving space in which all pairs of motor contact elements and converter contact elements are received.
The receiving space should in particular be fluid-tight with respect to cooling liquids, lubricating liquids and/or liquids present in the surroundings of the receiving space, i.e. in particular with respect to water and oil. Depending on the particular operating situation, it may be sufficient that the receiving space is splash-proof, for example. Preferably, however, the receiving space is sealed with respect to the liquid at rest for at least a few minutes, such as 5, 10, 20 or 60 minutes, or preferably for a few hours.
The motor contact element can be enclosed by the motor housing assembly or by the motor housing assembly and the motor sealing part in such a way that the motor housing is fluid-tightly closed at least in the region of the motor contact element, and/or the converter contact element can be enclosed by the converter housing assembly or by the converter housing assembly and the converter sealing part in such a way that the converter housing is fluid-tightly closed at least in the region of the converter contact element. In particular, a liquid exchange between the receiving space and the interior of the converter housing or of the motor housing can thereby be avoided.
The converter housing and/or the motor housing are preferably closed fluid-tightly. This also means, in particular, that the other joints (anschlusse) or shaft bushings (wellendurchu hrung) of these components are likewise designed to be fluid-tight. For the converter, for example, the connections for the direct voltage or the control signals can also be sealed. In particular, the shaft channel is sealed in a fluid-tight manner for the electric machine. Further, for example, joints for sensors, control devices, and the like may be sealed. The fluid tightness of the entire converter housing or the motor housing makes it possible, for example, to fill these housings with cooling fluid or the like.
The motor contact element or the converter contact element may have an opening through which the fastening member extends. Robust contacting of these elements can thus be achieved by technically simple means.
The fastening means may be a screw which engages into a thread formed by the converter contact element or the motor contact element. The one of the contact elements which is not threaded can in particular have an opening through which the screw is guided. For example, the head of the screw can be placed on the edge of the opening, directly or by means of a washer or the like, and in turn press the contact element with the opening onto the contact element with the thread.
An accommodation space sealing member may be arranged between the motor housing assembly and the inverter housing assembly to fluid-tightly close the fluid-tight accommodation space on a side of the opening of the motor contact element facing the inverter contact element or on a side of the opening of the inverter contact element facing the motor contact element. The accommodation space sealing member may be pre-mounted on the motor housing assembly or the inverter housing assembly before assembly, or may be inserted between these assemblies in the case of assembly. The sealing against the environment on the aperture side can preferably be carried out jointly by the receiving space sealing means and the motor housing assembly and the converter housing assembly. The closing with respect to the motor can be performed by the motor housing assembly, the motor contact element and optionally the motor sealing member. The face to the transducer may be closed by the transducer housing assembly, the transducer contact element and optionally the transducer sealing member. In this way, the receiving space can be sealed off approximately automatically at least on one side of the opening, with the motor contact element and the converter contact element being mechanically fixed to one another. This results in a simple design of the drive device according to the invention, wherein the assembly can be automated particularly easily.
The drive device may have a closing element which is connected to the motor housing assembly or the converter housing assembly directly or via a closing seal in order to close the fluid-tight receiving space in a fluid-tight manner on the side of the opening of the motor contact element facing away from the converter contact element or on the side of the opening of the converter contact element facing away from the motor contact element. The receiving space can in particular be closed fluid-tightly by the closing element being connected to the motor housing assembly or the converter housing assembly after the mechanical fastening of the motor contact element and the converter contact element to one another. This can be done, for example, by screwing, gluing, clamping, etc. Overall, therefore, the fluid-tight receiving space can be constructed in a few working steps which are easy to automate. The closing element can in particular be a plate-shaped closing element which is placed directly or via a closing seal on a circumferential projection of the motor housing assembly or the converter housing assembly.
The motor housing assembly or the converter housing assembly can form at least one spacer on which the closure element is placed directly or via the closure sealing means, said at least one spacer spacing the closure element from the opening. A receiving space for the part of the fastening part projecting beyond the opening, for example the head of a screw or the like, can thereby be provided by simple means.
The motor housing assembly may be connected to another motor housing assembly via a motor housing seal and/or the inverter housing assembly may be connected to another inverter housing assembly via an inverter housing seal. This allows, for example, different materials, shapes, etc. to be used for different housing assemblies. For example, a large part of the housing may be made of metal, while the components surrounding the motor contact element or the converter contact element are made of plastic, for example, to ensure insulation of the respective contact elements.
The receiving space can be at least partially, i.e. for example, in an angular range, surrounded by a shielding element, for example a metal plate or an electrically conductive grid, in order to reduce or suppress the emergence or incidence of electromagnetic radiation in the contact region between the motor contact element and the converter contact element.
In addition to the drive according to the invention, the invention also relates to a motor vehicle comprising the drive according to the invention.
Drawings
Further advantages and details of the invention emerge from the following examples and the figures. Here, it is schematically shown that:
fig. 1 shows an embodiment of a motor vehicle according to the invention, which comprises an embodiment of a drive device according to the invention, an
Fig. 2-5 are detailed views of an embodiment of a drive device or components thereof according to the invention.
Detailed Description
Fig. 1 shows a motor vehicle 1 having an
The
The connection of the converter contact element 6 to the
Taking as an example one of the contact structures between the converter contact element 6 and the
As will be explained in more detail later on, the converter contact element 6 may form a
Fig. 3 shows a detailed view of the
The
The various sealing members or seals may, for example, be constructed of rubber or another elastomer, be a fluid-tight adhesive layer, or the like.
Fig. 4 shows the connection of the converter contact element 6 to the
In this example, a screw is used as the
In order to also close the part of the receiving
For the purpose of electrical shielding, the region of the receiving space can be at least partially surrounded by a further shielding element 23 (for example a conductive grid or a conductive plate). Electromagnetic shielding of the drive can also be achieved without difficulty if, for example, the
In an alternative not shown, the
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