Electrical device, in particular controller, control system or converter for feeding an electric motor

Abstract

The invention relates to an electrical device, wherein the housing of the electrical device has a cooling plate and a frame part, the frame part having a yoke, a first limb and a second limb, the yoke being connected to the first limb and to the second limb, the first limb being spaced apart from the second limb, wherein a plug connector part of the electrical device is mounted on a printed circuit board which is connected to the cooling plate and / or which is fixed to the cooling plate, wherein a plug connector housing part of the plug connector part protrudes into a window of the first limb and lies flush against the surface of the first limb.

Description

[0001] Electrical device, in particular controller, control unit or inverter for supplying power to an electric motor

[0002] Description:

[0003] The invention relates to an electrical device, in particular a controller, a control unit or a converter for supplying an electric motor.

[0004] It is generally known that in an electrical device, a connector part of the electrical device is accessible from the outside in order to be able to plug in a mating connector part.

[0005] A control unit is known from DE 4303908 A1.

[0006] The invention is therefore based on the objective of making an electrical device quick and easy to manufacture.

[0007] According to the invention, the problem is solved in the electrical device according to the features specified in claim 1.

[0008] Important features of the invention in the electrical device are that the electrical device, in particular a controller, a control unit or a converter for supplying an electric motor, has a housing,

[0009] wherein the housing of the electrical appliance includes a cooling plate and a frame part,

[0010] wherein the frame part has a yoke, a first leg and a second leg,

[0011] where the yoke is connected to the first leg and to the second leg,

[0012] where the first leg is spaced apart from the second leg,

[0013] wherein a connector part of the electrical device is mounted on a circuit board which is connected to and / or attached to the cooling plate,

[0014] ISI \ EIDOPAT 16.02.2026 wherein a connector housing part of the connector part projects into a window of the first leg and is flush with the surface, in particular the outer surface, of the first leg.

[0015] An advantage of this design is that assembly is only possible with a frame component whose angle between the yoke and the first leg is greater than 90°. Otherwise, the connector housing would block the first leg and thus the frame component. Insertion is therefore only possible if the opening angle between the yoke and each leg is greater than 90°. After insertion, the two legs are pressed together until the opening angle is 90°. During this pressing action, the connector housing is threaded into the opening of the first leg until it is flush with its outer surface.

[0016] When the electrical device is used as a controller, it is important that the controller operates at a sufficiently high power level that at least one of its electronic components must be cooled via the cooling plate. Since the cooling plate is larger than the circuit board, a correspondingly large thermal power dissipation current from the electronic component can be spread across the cooling plate.

[0017] In an advantageous embodiment, the frame component, including its yoke, first leg, and second leg, is formed in one piece, particularly as a single unit. A further advantage is that the frame component can be manufactured quickly and easily as a stamped and bent part.

[0018] In an advantageous embodiment, the yoke and the first leg form an angle of 90°. The advantage here is that although the opening angle is 90°, an elastic preload is applied which tends to increase the opening angle.

[0019] In an advantageous embodiment, the yoke and the second leg form an angle of 90°. The advantage here is that although the opening angle is 90°, an elastic preload is applied which tends to increase the opening angle.

[0020] In an advantageous embodiment, the first leg and the second leg are each attached to the cooling plate by means of at least one screw projecting through the cooling plate, the threaded portion of which is screwed into a threaded bore or recess of the respective leg.

[0021] In particular, the screw head of each screw rests on the side of the cooling plate facing away from the respective leg. An advantage of this is that the frame part is fixed and thus stiffened. A sheet metal part can be used as the frame part, which is sufficiently stiffened when the screws are tightened.

[0022] In a preferred design, each window is formed as a continuous recess in the respective leg. This has the advantage of allowing for simple manufacturing.

[0023] In an advantageous embodiment, the first leg is elastically prestressed by a spring force,

[0024] which is directed outwards, specifically away from the second leg and / or away from the circuit board. An advantage of this is that during assembly or disassembly, the spring force ensures that the respective leg is not blocked by the connector housing.

[0025] In an advantageous embodiment, the second leg is elastically prestressed by a spring force.

[0026] which is directed outwards, specifically away from the first leg and / or away from the circuit board. An advantage of this is that during assembly or disassembly, the spring force ensures that the respective leg is not blocked by the connector housing.

[0027] In a preferred embodiment, the first leg, the second leg, and the yoke each cover one side of the electrical device, forming a housing. It is advantageous that the frame section encloses three sides of the electrical device in total.

[0028] In an advantageous embodiment, the printed circuit board is aligned parallel to the cooling plate. It is advantageous that the frame part is inserted during assembly in a direction parallel to the plane of the printed circuit board. In an advantageous embodiment, the perpendicular projection of the cooling plate into the plane of the printed circuit board completely encompasses and / or includes the perpendicular projection of the printed circuit board into the plane of the printed circuit board.

[0029] In particular, the printed circuit board plane is the plane that contains the side of the printed circuit board facing the cooling plate. It is advantageous that the cooling plate encloses one side of the electronic device and is larger than the printed circuit board.

[0030] In a preferred embodiment, the frame component is a stamped and bent sheet metal part. The advantage here is that it allows for simple and cost-effective manufacturing.

[0031] In an advantageous embodiment, prominent spring areas are formed on the outer circumference of the respective connector housing part, which are elastically deformed and press against the edge of the window.

[0032] In particular, the spring sections act as threading aids, centering aids, and / or alignment aids during the assembly of the frame part. It is advantageous that the connector housing part can be arranged in a well-defined relative position to the first leg.

[0033] In an advantageous embodiment, the first leg has a first leg section which is connected to a second leg section of the first leg via a yoke section, in particular wherein the yoke section and the two leg sections are formed in one piece. It is advantageous that the first leg has a U-shaped profile, so that high stiffness can be achieved even with a thin-walled sheet.

[0034] In a preferred embodiment, the window is arranged in the yoke area of ​​the first leg section. An advantage of this is that it allows for simple manufacturing.

[0035] In an advantageous embodiment, the threaded bore or recess is arranged in the first leg section. This is advantageous because it allows for simple manufacturing. In another advantageous embodiment, the first leg section projects between the cooling plate and the connector housing part. This is advantageous because the frame part is guided and limited, particularly by the cooling plate and the connector housing part.

[0036] In an advantageous embodiment, the first leg section is bounded by the cooling plate and the connector housing part, particularly in the normal direction and against the normal direction of the printed circuit board plane. It is advantageous that the frame part is guided and bounded, particularly by the cooling plate and the connector housing part. Important features of the method for manufacturing an electrical device are that, in a first process step, a frame part, which has a yoke connected to a first leg and a second leg, forming an angle of more than 90° with the first leg and forming an angle of more than 90° with the second leg, is inserted with its first leg between a connector housing part and a cooling plate.

[0037] wherein the connector is mounted on a printed circuit board which is connected to the cooling plate, in particular wherein the printed circuit board and the cooling plate are aligned parallel to each other,

[0038] wherein in a second procedural step, which follows the first procedural step in time

[0039] the first leg is pressed towards the connector housing part, so that the connector housing part is inserted into a window of the first leg until the yoke forms an angle of 90° with the first leg and the connector housing part is flush against the outer surface of the first leg, in particular

[0040] and

[0041] the second leg is pressed towards the connector housing part until the yoke forms an angle of 90° with the second leg and the connector housing part lies flush against the outer surface of the first leg, in particular

[0042] wherein in a third procedural step, which follows the second procedural step in time

[0043] the threaded section of a first screw protruding through the cooling plate is screwed into a recess or threaded bore of the first leg and

[0044] The threaded section of a second screw protruding through the cooling plate is screwed into a recess or threaded bore of the second leg. An advantage of this is that it allows for unobstructed insertion of the frame part, and the resulting preload forces and screw connections increase the rigidity of the frame part.

[0045] Further advantages arise from the dependent claims. The invention is not limited to the combination of features of the claims. For those skilled in the art, further meaningful combinations of claims and / or individual claim features and / or features of the description and / or the figures will become apparent, in particular from the problem statement and / or the problem arising from a comparison with the prior art. The invention will now be explained in more detail with reference to the figures:

[0046] Figure 1 shows an electrical device according to the invention, in particular a controller, a control unit or an inverter for supplying an electric motor, in an oblique view, wherein a frame part 1 provided as a housing-forming element is shown at the beginning of the insertion during assembly.

[0047] In Figure 2, the frame part 1 is inserted, but the legs (3, 4) still protrude outwards and must be pressed down and secured.

[0048] In Figure 3, the frame part 1 is pressed into place and fastened with screws 30.

[0049] In Figure 4, the frame part 1 is shown in top view in the unpressed state, corresponding to Figure 2, with dashed lines and in the pressed state with solid lines.

[0050] As shown in the figures, the electrical device has a circuit board populated with components, whereby the waste heat from the components is dissipated to a cooling plate 5.

[0051] The cooling plate 5 forms the top of the electrical device.

[0052] Connector components, in particular sockets, are mounted and soldered onto the circuit board. Each connector housing part 6 surrounds the contact pins at least radially and projects through a respective window, in particular a respective continuous recess, of the frame part 1, especially of the first or second leg (3, 4), and is flush with the edge of the window. Thus, the end face of each connector housing part 6 is flush with the same plane that also rests against the flat surface of the first or second leg (3, 4).

[0053] The first and second legs (3, 4) are connected to each other via the yoke 2 and spaced apart. The respective transition area between each leg (3, 4) and the yoke 2 is designed as a bending section, allowing each leg (3, 4) to pivot relative to the yoke 2. In particular, the bending section functions similarly to a swivel joint. During assembly, each leg (3, 4) is pivoted towards the respective connector housing part 6 until it protrudes through a window in the leg (3, 4) and the connector housing part 6 is flush, especially on the side of the leg (3, 4) facing away from the circuit board. A spring force must be overcome during this pivoting action.

[0054] Once the two legs (3, 4) have been pivoted so that the respective connector housing part 6 is flush, the respective threaded section of at least one screw 30 is screwed through a continuous threaded bore in the cooling plate 5 into a recess in the respective leg (3, 4). Thus, the respective leg (3, 4) is then fixed relative to the cooling plate 5.

[0055] Each leg (3, 4) has a substantially U-shaped profile. Each leg (3, 4) thus has a yoke area and two leg sections connected to this yoke area. The recess is located in one of the leg sections facing the cooling plate 5. The respective windows are designed as recesses extending through the yoke area.

[0056] Insertion of the frame part 1 with pivoted legs (3, 4) would be prevented by the connector housing part 6, since when the yoke area of ​​the frame part 1 is in line with the end area of ​​the connector housing part 6.

[0057] The cooling plate 5 has a wall thickness at least ten times greater than the frame part 1. Preferably, the frame part 1 is designed as a stamped and bent part.

[0058] On the outer circumference of the respective connector housing part 6, outwardly projecting spring areas 7 are formed, which press elastically on the respective window frame and function as a threading aid, centering aid and / or alignment aid.

[0059] In further embodiments of the invention, cooling fins projecting into the environment are formed on the side of the cooling plate 5 facing away from the circuit board. Reference numeral list

[0060] 1 frame part

[0061] 2 yoke

[0062] 3 legs

[0063] 4 legs

[0064] 5 cooling plates

[0065] 6 Connector housing part 7 Spring area

[0066] 8 windows

[0067] 30 screw

Claims

Patent claims:

1. Electrical device, in particular controller, control unit or inverter for supplying an electric motor, wherein the housing of the electrical appliance includes a cooling plate and a frame part, characterized by the fact that the frame part has a yoke, a first leg and a second leg, where the yoke is connected to the first leg and to the second leg, where the first leg is spaced apart from the second leg, wherein a connector part of the electrical device is mounted on a circuit board which is connected to and / or attached to the cooling plate, wherein a connector housing part of the connector part projects into a window of the first leg and is flush with the surface, in particular the outer surface, of the first leg.

2. Electrical device according to one of the preceding claims, characterized by the fact that the frame part, including its yoke, its first leg and its second leg, is formed in one piece, in particular in one piece. and / or that the yoke and the first leg form an angle of 90°, and / or that the yoke and the second leg form an angle of 90°.

3. Electrical appliance according to any of the preceding claims, characterized by the fact that the first leg and the second leg are each attached to the cooling plate by means of at least one screw protruding through the cooling plate, each screw being screwed with its threaded section into a threaded hole or recess of the respective leg, in particular, wherein the screw head of the respective screw rests on the side of the cooling plate facing away from the respective leg.

4. Electrical appliance according to any of the preceding claims, characterized by the fact that The respective window is designed as a continuous recess in the respective leg.

5. Electrical appliance according to any of the preceding claims, characterized by the fact that the first leg is elastically pre-tensioned by a spring force, which is directed outwards, in particular away from the second leg and / or away from the circuit board.

6. Electrical appliance according to any of the preceding claims, characterized by the fact that the second leg is elastically prestressed by a spring force, which is directed outwards, in particular away from the first leg and / or away from the circuit board.

7. Electrical appliance according to any of the preceding claims, characterized by the fact that The first leg, the second leg and the yoke each cover one side of the electrical device, forming a housing.

8. Electrical appliance according to any of the preceding claims, characterized by the fact that the circuit board is aligned parallel to the cooling plate.

9. Electrical appliance according to any of the preceding claims, characterized by the fact that the perpendicular projection of the cooling plate into the printed circuit board plane completely encompasses and / or includes the perpendicular projection of the printed circuit board into the printed circuit board plane, in particular wherein the printed circuit board plane is the plane which contains the side of the printed circuit board just executed that faces the cooling plate.

10. Electrical appliance according to any of the preceding claims, characterized by the fact that The frame part is a stamped and bent part made of sheet metal.

11. Electrical appliance according to any of the preceding claims, characterized by the fact that On the outer circumference of each connector housing part, excellent spring areas are formed which are elastically deformed and press against the edge of the window. in particular wherein the spring areas function as a threading aid, centering aid and / or alignment aid during the assembly of the frame part.

12. Electrical device according to one of the preceding claims, characterized by the fact that the first leg has a first leg area which is connected to a second leg area of ​​the first leg via a yoke area, in particular wherein the yoke area and the two leg areas are made in one piece.

13. Electrical appliance according to any of the preceding claims, characterized by the fact that the window is located in the yoke area of ​​the first leg area and / or that the threaded hole or recess is located in the first leg area.

14. Electrical appliance according to any of the preceding claims, characterized by the fact that the first leg section protrudes between the cooling plate and the connector housing part and / or that the first leg area is limited by the cooling plate and the connector housing part, especially in the normal direction and against the normal direction of the Printed circuit board level.

15. Method for manufacturing an electrical device, in particular according to one of the preceding claims, characterized by the fact that In a first process step, a frame part, which has a yoke connected with a first leg and with a second leg, which forms an angle of more than 90° with the first leg and which forms an angle of more than 90° with the second leg, is inserted with its first leg between a connector housing part of a connector part and a cooling plate. wherein the connector part is mounted on a printed circuit board which is connected to the cooling plate, in particular wherein the printed circuit board and the cooling plate are aligned parallel to each other, wherein in a second procedural step, which follows the first procedural step in time the first leg is pressed towards the connector housing part, so that the connector housing part is inserted into a window of the first leg until the yoke forms an angle of 90° with the first leg and the connector housing part is flush against the outer surface of the first leg, in particular and the second leg is pressed towards the connector housing part until the yoke forms an angle of 90° with the second leg and the connector housing part lies flush against the outer surface of the first leg, in particular wherein in a third procedural step, which follows the second procedural step in time the threaded section of a first screw protruding through the cooling plate is screwed into a recess or threaded bore of the first leg, and the threaded section of a second screw protruding through the cooling plate is screwed into a recess or threaded bore of the second leg.

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