阅读说明：本技术 机动车和用于机动车的变流器装置 (Motor vehicle and converter device for motor vehicle ) 是由 B·泽恩勒 于 2018-03-22 设计创作，主要内容包括：本发明涉及一种机动车,其包括：用于驱动机动车(25)的电机(1)；和具有冷却设备(10)的、用于为电机(1)提供交流电流的变流器装置(9),其中,冷却设备(10)具有至少一个冷却液连接端(11),所述至少一个冷却液连接端与电机(1)的冷却液接口(6)以导通液体的方式连接,以用于形成公共的冷却循环系统。(The invention relates to a motor vehicle, comprising: an electric machine (1) for driving a motor vehicle (25); and a converter arrangement (9) having a cooling device (10) for supplying the electric machine (1) with an alternating current, wherein the cooling device (10) has at least one coolant connection (11) which is connected in a fluid-conducting manner to a coolant connection (6) of the electric machine (1) for forming a common cooling circuit.)

1. An automotive vehicle, comprising: an electric machine (1) for driving a motor vehicle (25); and a converter device (9) having a cooling device (10) for supplying an alternating current to the electric machine (1),

it is characterized in that the preparation method is characterized in that,

the cooling device (10) has at least one coolant connection (11) which is connected in a fluid-conducting manner to a coolant connection (6) of the electric machine (1) for forming a common cooling circuit.

2. Motor vehicle according to claim 1, characterized in that the converter device (9) is arranged on a motor housing (2) of the motor (1), wherein the converter device (9) and the motor housing (2) delimit a receiving region (5) in which the coolant connection (11) and the coolant connection (6) are arranged.

3. Motor vehicle according to claim 1 or 2, characterized in that the converter device (9) has a floor (12) for arranging components of the converter device (9).

4. Motor vehicle according to claim 3, characterized in that the cooling device (10) is formed or arranged on the floor panel (12), in particular embedded therein, by a plurality of cooling channels provided inside the floor panel (12).

5. A motor vehicle according to claim 3 or 4, characterized in that the coolant connection (11) is arranged on the side of the floor panel (12) facing the electric machine (1) or on at least one edge side (24) of the floor panel.

6. A motor vehicle according to any one of claims 3 to 5, characterized in that a converter unit (15) of power electronics and/or an intermediate circuit capacitor (16) and/or a control device (17) and/or a DC voltage connection (22) for connecting the converter device (9) to a low-voltage on-board power supply system (27) of the motor vehicle (25) are provided as components.

7. A motor vehicle according to claims 4 and 6, characterized in that the converter unit (9) is arranged on a cooling device (10) provided at the floor panel (12).

8. The motor vehicle according to claim 6 or 7, characterized in that the component is arranged on the side of the floor panel (12) facing away from the electric machine (1).

9. A motor vehicle according to any one of claims 3 to 8, characterized in that an electromagnetic filter unit (18) and/or an AC voltage connection (19) for electrically connecting the converter device (9) to the electric machine (1) and/or a DC voltage connection (20) for electrically connecting the converter device (9) to the high-voltage component (20) and/or a DC voltage connection (21) for electrically connecting the electric machine (1) to a low-voltage on-board electrical system (26) of the motor vehicle (25) via the converter device (9) are provided as components.

10. Motor vehicle according to claim 9, characterized in that the component is arranged on the side of the floor panel (12) facing the electric machine (1).

11. Motor vehicle according to any of claims 3 to 10, characterized in that the housing part (13) of the converter device (9) encloses components arranged on the side facing the electrical machine (1).

12. Motor vehicle according to claim 11, characterized in that the cooling water connection (11) penetrates the housing part (13) or is arranged on the floor (12) outside the housing part (13).

13. Motor vehicle according to claim 12, characterized in that the cooling water connection (11) arranged outside the housing part (13) is arranged on the side of the floor panel (12) facing the electric machine (1) or on the edge side or one edge side (24) of the floor panel (12).

14. Motor vehicle according to any of claims 3 to 13, characterized in that the housing part (14) of the converter device (9) encloses components arranged on the side facing away from the electric machine.

15. A current transformer arrangement for a motor vehicle according to any one of the preceding claims.

Technical Field

The invention relates to a motor vehicle, comprising: an electric motor for driving the motor vehicle; and a converter arrangement with a cooling device for supplying an alternating current for the electric machine.

Background

In partially or fully electrically driven motor vehicles, the dc voltage provided by the high-voltage battery is typically converted by means of a converter device into a single-phase or multi-phase ac current for driving the electric machine. Of particular interest here is the cooling of converter assemblies which generate heat during operation of the converter assemblies by means of a cooling device.

From DE 102009058270 a1, an inverter for an electric traction system in vehicle technology is known, which comprises: a power module disposed on the cooling plate, the power module being connected to the motor; and a water cooler located below the power module.

In this arrangement, the water cooler is provided exclusively for cooling the converter device, which requires a large installation space. Furthermore, there are seals inside the inverter that are prone to leakage.

Document DE 102010029374 a1 also discloses a power electronic device having a power electronic device housing and an electronic device component received therein, and a connecting device having an electrical connection arranged on the power electronic device housing, which is provided as a means for connecting a plurality of high-voltage cables to the electronic device component or to the electronic device component.

Document DE 102014002522 a1 discloses a battery for a vehicle, which battery comprises a plurality of battery cells connected to one another and a conductor cooling device for cooling the battery cells, wherein the conductor cooling device has a cooling plate which is connected in a thermally conductive manner to an electrode of the battery cells and which has a through-opening in the region of the electrode of the battery cells, into which through-opening the electrode protrudes or penetrates. The battery cells are in thermal contact with the cooling plate via the associated electrodes by means of thermally conductive and electrically insulating ceramic elements.

Disclosure of Invention

The object of the invention is to design a converter device in a motor vehicle in a manner that saves installation space and can be operated safely.

In order to achieve this object, according to the invention, in a motor vehicle of the type mentioned at the outset, it is proposed that the cooling system has at least one coolant connection which is connected in a fluid-conducting manner to a coolant connection of the electric machine in order to form a common cooling circuit.

The invention is based on the following considerations: the cooling device for cooling the converter arrangement is connected to a cooling circuit of the electric machine, for example for stator cooling and/or rotor cooling. The cooling device can thus advantageously use the existing cooling components of the electric machine together, in order to save installation space of the converter arrangement. At the same time, the number of liquid-conducting connecting points to be sealed can be reduced, and a safer operation of the converter device and the motor vehicle as a whole can be achieved.

Preferably, the converter device is arranged on a motor housing of the electric machine, wherein the converter device and the motor housing delimit a receiving region in which the coolant connection and the coolant connection are arranged. The receiving area can be delimited by a frame-like and/or groove-like section of the motor housing. The section is expediently arranged on the outside of the motor housing. The segments typically have walls that extend in a radial direction relative to the rotational axis of the electric machine. The converter device can then be placed on the free end of the wall and thus together with the wall of the motor housing delimit the receiving region.

According to a particularly advantageous embodiment of the invention, the converter device has a base plate for arranging components of the converter device. Preferably, the busbars which connect the components to one another are also guided along the base plate and can thus cool these busbars.

The cooling device can be formed here by a plurality of cooling channels arranged inside the base plate. The base plate can thus be traversed by the cooling liquid. The base plate can thus serve as an active heat sink in order to efficiently dissipate the heat generated by the components of the converter arrangement to the common cooling circuit.

In an alternative embodiment, the cooling device can be arranged on the base plate. The base plate is in this case essentially designed as a carrier element for the components and the cooling device and is therefore only used passively for further conduction of heat to the cooling device arranged on the cooling plate. Particularly preferably, the cooling device is embedded in the base plate. That is, the bottom plate has an opening inside which at least a part of the cooling device is present. A particularly space-saving arrangement of the cooling device can thus be achieved.

In some embodiments of the motor vehicle according to the invention, it is advantageous if the coolant connection is arranged on the side of the floor panel facing the electric machine or on at least one edge side of the floor panel. The edge side is understood here to mean the side of the base plate which connects the side of the base plate facing the electric machine to the side of the base plate facing away from the electric machine.

The converter unit and/or the intermediate circuit capacitor and/or the control device and/or the direct voltage connection for connecting the converter device to the low-voltage on-board electrical system of the motor vehicle can be provided as a component of the converter device. These components are preferably arranged on the side of the base plate facing away from the electric machine.

Particularly preferably, the converter unit is arranged on a cooling device provided at the base plate. Since the converter cells typically contribute most to the heat generation of the converter arrangement, it is preferred that they are thermally coupled directly to the cooling device. Even if the base plate itself forms the cooling device, it is expedient to enable as high a heat transfer as possible from the converter unit to the base plate, for example via as large a contact surface as possible. It is also expedient to arrange the intermediate circuit capacitor directly on the base plate or the cooling device, since the intermediate circuit capacitor also contributes significantly to the heat generation of the converter arrangement.

As a component of the converter device, an electromagnetic filter unit and/or an ac voltage connection for electrically connecting the converter device to the electric machine and/or a dc voltage connection for electrically connecting the converter device to a high-voltage on-board electrical system and/or a dc voltage connection for electrically connecting the electric machine to a low-voltage on-board electrical system of the motor vehicle via the converter device can also be provided. These components are preferably arranged on the side of the base plate facing the electric machine.

It is further preferred that the housing part of the converter device encloses components arranged on the side facing the electric machine. This housing part may also be referred to as first housing part.

According to one embodiment variant, the coolant connection can penetrate the housing part. In this case, the cooling device is located partially inside the housing part and extends outside the housing part in such a way that at least the coolant connection end is located outside the housing part.

An alternative embodiment variant provides that the coolant connection is arranged on the base plate outside the housing part. In this case, the housing part only partially surrounds the base plate, so that at least one section of the base plate is located outside the housing part. The coolant connection can then be accessed particularly easily from the outside. In particular, it is preferred that the coolant connection provided outside the housing part is arranged on the side of the base plate facing the electric machine or on the edge side or the edge side of the base plate.

It is also expedient for the housing part of the converter device to enclose the components arranged on the side facing away from the electric machine. This housing part may also be referred to as second housing part. Preferably, the housing part completely surrounds the side of the base plate facing away from the electric machine. The housing part can be fastened or can be fastened to the motor housing, in particular to the frame-like and/or groove-like section and/or to the wall of the motor housing, by means of fastening elements.

The housing parts are preferably designed as separate or as parts of a continuous housing.

The object of the invention is also achieved by a converter device for a motor vehicle according to the invention. All embodiments of the motor vehicle according to the invention can be used analogously for the converter device according to the invention, so that the aforementioned advantages can also be achieved with this converter device.

Drawings

Further advantages and details of the invention emerge from the exemplary embodiments described below and from the figures. The figures are schematic and show:

fig. 1 shows a detailed view of an electric machine for a motor vehicle;

fig. 2 shows a sectional view of a first exemplary embodiment of a converter arrangement according to the invention for a motor vehicle;

fig. 3 shows an exploded view of a further exemplary embodiment of a converter arrangement according to the invention for a motor vehicle;

fig. 4 shows a perspective view of the current transformer arrangement shown in fig. 3;

fig. 5 shows a schematic diagram of a further exemplary embodiment of a converter arrangement according to the invention for a motor vehicle in a sectional view; and

fig. 6 shows a schematic diagram of an exemplary embodiment of a motor vehicle according to the invention.

Detailed Description

Fig. 1 shows a detailed view of an electric machine 1, wherein a motor housing 2 is partially visible.

The motor housing 2 has a frame-like or groove-like section 3 with a plurality of walls 4 which delimit a receiving region 5. A coolant connection 6 is provided inside the receiving region 5 for the supply and discharge of a coolant for cooling the stator and/or the rotor of the electric machine 1. Furthermore, a connecting device 7 is provided inside the receiving region 5 for supplying the electric machine 1 with a three-phase ac voltage and a dc voltage, for example 12 volts, provided by a low-voltage battery. Furthermore, a dc voltage connection 8 for supplying a dc voltage from the high-voltage battery to be converted into an ac voltage is integrated in the wall 4.

The open side of the receiving region 5 in fig. 1 is additionally delimited in the installed state by a converter device 9 (see fig. 2 to 5) which is placed on the motor housing 2 and fastened to the wall 4. The converter device 9 converts the dc voltage supplied via the dc voltage connection 8 into a three-phase ac voltage and allows the low-voltage battery to be connected to the connecting device 7. The converter device 9 also has a cooling system 10 with a coolant connection 11 (see fig. 2 to 5) which is connected or connectable to the coolant connection 6 to form a common cooling circuit for the electric machine 1 and the converter device 9.

Fig. 2 shows a sectional view of a first exemplary embodiment of a converter device 9, which comprises a receiving region 5 of a motor housing 2 and a section 3 with a wall 4.

The converter device 9 comprises: a base plate 12 in which the cooling device 10 is integrated; a first housing part 13 on the side of the base plate 12 facing the electric machine 1; and a second housing part 14 on the side of the base plate 12 facing away from the electric machine 1. The cooling device 10 penetrates the base plate 13 and the first housing part 13 in such a way that the coolant connection ends 11 (only one can be seen in fig. 2) extend in the receiving region 5 and can be connected to the coolant connection 6 in the receiving region.

The components of the converter device 9 are arranged on the side of the base plate 12 facing away from the electric machine 1 and are surrounded by a second housing part 14, which is preferably made of metal, for example aluminum. The components are a power electronic converter cell 15, an intermediate circuit capacitor 16, a control unit for actuating a control device 17 of the converter cell 15, and a dc voltage connection, not shown, for connecting the converter device to a low-voltage battery. The converter unit 15 is here arranged directly on the cooling device 10 through which the cooling fluid flows, since it contributes most to the heat generated during operation of the converter device 9. The intermediate circuit capacitor 16 is thermally conductively coupled to the base plate 12 in order to convey the heat generated by the intermediate circuit capacitor during operation to the cooling device 10 via the base plate.

Further components of the converter device 9 are arranged on the side of the base plate 12 facing the electric machine 1 and are surrounded by a first housing part 13, which is preferably made of plastic, for example polyamide. The components are an electromagnetic filter unit 18, an ac voltage connection 19 for electrically connecting the converter device 9 to the connecting device 7, a dc voltage connection, not shown, for electrically connecting the converter device 9 to the high-voltage battery via the dc voltage connection 8, and a dc voltage connection, not shown, for electrically connecting the electric machine 1 to the low-voltage battery via the connecting device 7.

The first housing part 13 is placed on the base plate 12 and fixed thereto, while the second housing part 14 engages the base plate 12 and, in the mounted state, rests on the section 3 of the motor housing 2. Thereby closing the receiving area 5. The second housing part 14 is fastened together to the wall 4 by means of fasteners not shown. For the multi-part embodiment of the housing parts 13, 14 shown, it is alternatively also conceivable for the housing parts 13, 14 to form a continuous housing.

Fig. 3 shows an exploded view of a further exemplary embodiment of a converter device 9, wherein elements that are identical or have the same function as in fig. 2 are provided with the same reference numerals. The converter device 9 differs from the exemplary embodiment shown in fig. 2 essentially in that the base plate 12 is designed as a cooling device 10 through which a cooling fluid flows, for which purpose cooling channels, not shown, are provided in the interior of the base plate 12. Furthermore, the coolant connection 11 (see fig. 4) does not penetrate the base plate 12 and the first housing part 13, but is formed outside the housing parts 13, 14 on the side of the base plate 12 facing the electric machine 1.

Also shown in fig. 3: a dc voltage connection 20 for electrically connecting the converter device 9 to the high-voltage battery via the dc voltage connection 8; a dc voltage connection 21 for electrically connecting the electric machine 1 to a low-voltage battery via the connecting device 7; a dc voltage connection 22 for connecting the converter device 9 to a low-voltage battery; and a shield 23 of the control device 17 between the control units of the control device.

Fig. 4 shows a perspective view of the converter device 9 shown in fig. 3, wherein the base plate 12 faces the side of the electrical machine 1. It can be seen that the coolant connection 11 of the cooling device 10 is designed as an opening in the base plate 12, into which the cooling channel opens. The coolant connection can thus be connected to the coolant connection 6 of the electric machine 1 by means of a suitable connection.

Fig. 5 shows a schematic diagram of a further exemplary embodiment of a converter device 9 in a sectional view, wherein elements that are identical or have the same function as in fig. 3 are provided with the same reference numerals. The converter arrangement 9 differs from the exemplary embodiment shown in fig. 3 essentially in that the coolant connection 11 is arranged on the edge surface 24 of the base plate.

Fig. 6 shows a schematic representation of a motor vehicle 25, which comprises an electric machine 1 according to fig. 1 for partially or completely driving the motor vehicle 25 and a converter device 9 fastened to the electric machine according to one of the exemplary embodiments described above. The converter device 9 is connected via a dc voltage connection 8 to a high-voltage on-board system 26 and via a dc voltage connection 23 to a low-voltage on-board system 27 of the motor vehicle 25.