Electronic component housing and electric motor

Abstract

The invention relates to an electronic component housing (1) for an electric motor (15), having a mounting surface (6) for axial fastening to a stator bushing (20) of the electric motor (15), which mounting surface (6) defines a mounting plane (7) extending radially towards an axis of the electric motor (15), at least one cooling channel (10a, 10b) being formed on an outer wall (9) of the electronic component housing (1), the stator bushing (20) extends at least partially in the axial direction (11) and is designed to guide a cooling air flow to the stator bushing (20) of the electric motor (15). The electronic component housing (1) has a cooling channel extension (12) for a cooling air flow, which extends beyond the radial mounting plane (7) in the axial direction (11) and forms an axial extension of the cooling channel (10b). The invention also relates to a corresponding electric motor (15).

Description

Technical Field

[0001] The present invention relates to an electronic component housing for an electric motor having a mounting surface for axial fastening to a stator bushing of the electric motor, the mounting surface defining a mounting plane extending radially toward the axis of the electric motor, wherein at least one cooling channel is formed on the outer wall of the electronic component housing, the cooling channel extending at least partially in the axial direction and configured to guide cooling airflow to the stator bushing of the electric motor.

[0002] The present invention also relates to an electric motor having the housing of the electronic components. Background Technology

[0003] The type of electronic component housing for electric motors described above has been known from practice in recent years. Numerous solutions exist in the field of electric motors with integrated electronic components, such as those used in fans, for cooling electronic component housings and stator bushings for cooling electric motors.

[0004] A simple approach utilizes air vortices between the fins of an air delivery element. The air delivery element can rotate around the stator along with the rotor of the electric motor and can be configured, for example, as a cooling wheel and / or cooling ring. The fins of the air delivery element can cooperate with opposing stator bushing flange fins to generate cooling air vortices, which can be used to cool electronic component housings and / or to cool the stator bushing.

[0005] According to WO2014 / 019853A2, an electronic component housing has multiple axially extending cooling channels formed by ribs on its outer wall. To ensure cooling of the associated electric motor, or its stator bushing, an axially extending through-hole is provided in the stator bushing. Components connected to the rotor for anti-torsional adjustment draw in axial airflow through the through-hole during motor operation.

[0006] Another variation for cooling the stator bushing and separate electronic component housings is described in DE 102012003414 B4.

[0007] However, the known electronic component housings are not optimal in terms of targeted guidance of cooling air and simplified manufacturing of stator bushings. Furthermore, in terms of particularly diverse and flexible mounting options, the known electronic component housings are not optimal for mounting on relevant electric motors or their stator bushings. Summary of the Invention

[0008] Therefore, the object of this invention is based on at least substantially eliminating the problems present in the prior art. To this end, electronic component housings and electric motors of the type described at the beginning should be designed and improved by simple means, so that cooling air can be more concentratedly directed to the areas of the components to be cooled, especially the electronic components and / or the electric motor components. Furthermore, it should enable the electronic component housing to be variably and flexibly assembled onto the electric motor, and particularly benefit the simplified manufacturability of the stator bushing. Moreover, the electronic component housing and the electric motor according to the invention should be distinguishable from competing products.

[0009] According to the present invention, the objective is achieved by the features of claim 1. Accordingly, the electronic component housing has a cooling channel extension for cooling airflow, the cooling channel extension extending axially beyond the radial mounting plane and constituting an axial extension of the cooling channel.

[0010] In the case of an electric motor, the objective is achieved by the features of claim 9. Accordingly, the electric motor includes an electronic component housing according to the invention.

[0011] According to the present invention, it is first recognized that the above-mentioned objective can be achieved in a surprisingly simple way through ingenious improvements to the electronic component housing. Here, at least one cooling channel extension extends axially beyond the radial mounting plane, that is, extends into the plane of the stator bushing or around the stator bushing flange or between the various fastening elements of the stator bushing.

[0012] By providing a cooling channel extension for the electronic component housing according to the present invention, compared to known solutions, it is no longer necessary to provide a through hole in the stator bushing (through which cooling air can be drawn in axially). This is because the cooling air can be transported axially to the air delivery element through the cooling channel extension and drawn by the air delivery element through the cooling channel, or the cooling channel extension. Even with the through hole, the manufacturing of the stator bushing is simplified because the complex geometry for guiding the cooling air is configured for the electronic component housing, and no longer needs to be constructed in the stator bushing. This simplifies the manufacturing of the stator bushing. Furthermore, the electronic component housing according to the present invention is particularly versatile and flexible in its assembly with the electric motor or stator bushing. The cooling channel extension can be used here to ensure the fit between the electronic component housing and the electric motor or its stator bushing, or to allow for relative orientation of the electronic component housing and the stator bushing during assembly.

[0013] Therefore, an electronic component housing is described that can selectively direct cooling air to areas of components to be cooled, particularly those of electric motors. Furthermore, the electronic component housing can be variably and flexibly fitted onto electric motors and facilitates simplified manufacturability of the stator bushing. The electronic component housing according to the invention and the electric motor according to the invention distinguish them from competing products.

[0014] In other words, the cooling channel extension can be a guide element or an air guide element, which guides the cooling air drawn in from the side of the stator bushing, particularly by means of an air delivery element, axially through a radial mounting plane toward the part of the electric motor to be cooled.

[0015] The outer wall of the electronic component housing can be at least partially configured to be substantially cylindrical around the axis of the electric motor. An annular cooling channel extension can be provided along the outer wall. Alternatively, multiple cooling channel extensions can be provided along the outer wall. In other words, multiple cooling channel extensions can be provided around the outer periphery of the electronic component housing. Angular spacing can be configured between the cooling channel extensions.

[0016] Preferably, the cooling channel extension may have walls that radially outward and / or inwardly define the cooling channel. The wall radially inwardly defining the cooling channel may, for example, be the same as the outer wall of the electronic component housing. The wall radially outwardly defining the cooling channel may, for example, be constructed in the form of a radial cover device. The radial cover device may be integrally formed with the outer wall of the electronic component housing or constructed as a separate component, and may be mounted radially externally on the electronic component housing.

[0017] In other words, the wall can be installed as a separate component on the cooling channel. The radial cover device can also be, for example, part of the motor suspension.

[0018] In the lateral direction, or in other words, in the direction surrounding the outer periphery of the electronic component housing, cooling channels can be defined, for example, by ribs. Ribs can be constructed on the outer wall of the electronic component housing. Here, a cooling channel can be constructed between each pair of ribs. Conversely, a rib can also be constructed between each pair of cooling channels, separating the two cooling channels from each other, or in other words, laterally defining these cooling channels. In this way, cooling channels can be simply defined, and the electronic component housing can be manufactured in a simplified manner. In other words, ribs can constitute cooling ribs and increase the surface area for dissipating heat from the electronic component housing to the cooling air.

[0019] Ribs, particularly radially extending, can be provided in the stator bushing at the stator bushing end of the cooling channel or its extension. The ribs in the stator bushing, or on the stator bushing flange, can be corrugated to increase the cooling air path and cooling surface area. These ribs allow cooling air for the electric motor components to be drawn in radially in a beneficial manner. The stator bushing ribs can also be axially opposed to the air delivery elements.

[0020] For the particularly beneficial cooling of the electric motor components, the extended cooling channel is at least partially closed axially in the area of ​​the air outlet. This is advantageous because the airflow can be precisely and radially diverted inwards. For this purpose, for example, an inwardly pointing steering cantilever can be provided on the stator bushing side end of the extended cooling channel, which diverts the air outlet inwards. While diversion can already be achieved by drawing cooling air through the air delivery element, some air will leak out from the sealing gap (described in detail below). In this respect, precisely targeted diversion is advantageous.

[0021] The cooling channel extension can be integrally formed with the electronic component housing.

[0022] Considering the particularly flexible adaptability and ease of manufacture of the electronic component housing, the cooling channel extension can be constructed as a separate component relative to the electronic component housing. The cooling channel extension can be manufactured separately and can be fitted onto and / or inserted into the electronic component housing. The separate component can, for example, be constructed as a cooling channel segment. Here, multiple cooling channel segments can be provided along the outer wall of the electronic component housing. In other words, multiple cooling channel segments can be provided around the outer perimeter of the electronic component housing. For example, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, or more cooling channel segments can be provided. Angular spacing can be constructed between the cooling channel segments. These angular spacings around the electronic component housing can be constant or variable. The cooling channel segments can be mounted on the mounting surface of the electronic component housing, particularly on the end side of the electronic component housing.

[0023] According to one advantageous embodiment, the seal, which extends substantially along the assembly plane, can extend radially inward between the electronic component housing and the stator bushing, such that the cooling channel is on the outside.

[0024] Preferably, the electronic component housing has a base plate and / or cover that extend substantially radially. This further simplifies the manufacture and assembly of the electronic component housing. The electronic component housing may consist substantially of a cylindrical sleeve-shaped outer wall and a base plate and / or cover. The base plate and / or cover may be integrally formed with the outer wall or with the electronic component housing. Regarding the accessibility of the internal cavity of the electronic component housing, at least one of the base plate and / or cover may be configured as a separate component, thereby allowing the electronic component housing to be disassembled, or opened and / or closed.

[0025] Preferably, the base plate and / or cover may have a cooling body. Specifically, the cooling body may be configured as a material deposit in the base plate for thermal connection with the stator bushing, and / or may be configured as a material deposit in the cover for thermal connection with cooling channels. The housing facilitates heat transfer between the stator bushing and the cooling body by using a thermal interface material, particularly in the region of the cooling body in the base plate, between the stator bushing and the electronic component housing.

[0026] According to a beneficial improvement, the electronic component housing has a cover device in the inlet region of the cooling channel and / or adjacent to and / or at the inlet, which protects the inlet of the cooling channel to prevent further cooling air from entering the inlet in the presence of blockage. Here, the cover can form a bypass that allows cooling air to enter the cooling channel even when the inlet is blocked. The inlet of the cooling channel can be constructed at the end of the electronic component housing axially opposite to the mounting plane and axially opposite the outlet of the cooling channel, or the end of the cooling channel extension, or the stator bushing side. When the cooling channel is short and / or particularly only partially axially extended, the cover device can also be constructed along the outer periphery of the electronic component housing on the outer wall and / or on the end side and / or partially in the region of the cooling body to improve air guidance and flow around the area to be cooled.

[0027] The cover device for protecting the inlet of the cooling channel can also have a protrusion, thereby ensuring lateral airflow even when dirt / leaves, etc., cover the intake of the cooling channel. In other words, the protrusion defines a bypass for drawing in cooling air from the environment surrounding the electronic component housing, particularly from the side / radial. The cover device on the fins in the electronic component housing can here have a fin-shaped protrusion for airflow.

[0028] The cover device on the ribs of the electronic component housing may have ribs, and alternatively or additionally may have multiple cylindrical pins or, in other words, shafts. The shafts may be made of, for example, an elastic material, such as a thermoplastic elastomer, rubber, or the like, so as not to cause damage during operation and / or cleaning and to facilitate cleaning. The shafts form bypass channels in all directions, allowing cooling air to flow between the shafts in all directions when dirt or shavings are trapped at the air inlet of the electronic component housing at the entrance of the cooling channel during suction. The cover device may have one or more inlets for the cooling channel, which are preferably surrounded by the shafts. The flow rate can also be affected by the precise selection of the spacing and / or size and / or number of shafts. As an alternative or supplement to the shafts on a flat-shaped cover device, a corrugated profile may also be used, such that the trough profile between the ribs of the housing and on the upper side of the cover device creates a bypass for air leading to the inlets.

[0029] The wall that radially limits the cooling channel can be constructed as a rib structure with radial protrusions, forming a cover that surrounds the outer wall and extends axially around the electronic component housing. Such a cover can also be constructed, for example, via a motor suspension or an inflow nozzle.

[0030] In the case of electric motors, the aforementioned objective is achieved by the features of claim 9. Accordingly, the electric motor includes an electronic component housing of the type described above. The electric motor can also be configured, for example, as an external rotor motor, such as for a fan.

[0031] Preferably, the electric motor may include a stator with a stator bushing and a rotor with a rotor cover. The rotor cover may be configured to surround the stator bushing radially outside the stator bushing tower. A flange section may be constructed on the radially outside of the stator bushing for axial fastening to a fastening wall or support structure.

[0032] In the particularly advantageous, diverse, and flexible assembly of electronic component housings into electric motors, flange sections can have holes that serve as fastening eyes. The flange section defines a support ring. In other words, the flange section defines a support ring section by which the motor can be fastened. The electric motor as a whole can be fastened to a robust fastening wall or support structure on the flange section, or rather, on the support ring defined by these flange sections. Alternatively, the support ring can be constructed as annular.

[0033] Here, multiple assembly processes are feasible. The electric motor or fan can be fastened to the fastening wall or supporting structure from one side, and then the electronic component housing can be assembled from the other side.

[0034] Alternatively, the electronic component housing can be mounted onto the electric motor, and then the assembled electronic component housing and electric motor can be mounted onto a fastener. Both assembly processes are feasible and advantageous in after-sales service situations when assembling and disassembling assembled electronic component housings and / or electronic components.

[0035] Preferably, the cooling channel extension can be disposed between the flange sections used for axially fastening the stator bushing in a direction that surrounds the outer periphery of the electronic component housing.

[0036] Preferably, the cooling channel extension can be located radially inside a diameter region defined by the flange section or support ring. The diameter region defined by the flange section or support ring can be, for example, the inner diameter of the support ring or preferably, the centering diameter for the support structure. Here, the cooling channel extension is located inside the region defined by the centering diameter for the support structure. The inner diameter of the support ring and / or the inner diameter of the flange section and / or the centering diameter for the support structure can, in other words, be larger than the outer diameter of the electronic component housing. The inner diameter of the flange section can here be different from the centering diameter for the support structure. The flange section can have a centering area / screw-in area for the motor fastening device and a more internal area where the electronic component housing is placed or fastened to the flange section. The cooling channel extension is preferably located inside this centering area, i.e., radially between the centering area for the motor fastening device and the radially inner end of the flange section. The diameter region defined by the flange section can be the outer diameter of the flange section or the screw-in boss of the screw-in area. In this case, the motor fastening device may have a corresponding gap for the extension of the cooling channel.

[0037] The advantage of this is that the assembly unit of the electric motor and electronic component housing can be installed into the fastening wall or support structure particularly easily from one side. Here, the electronic component housing can pass through the assembly opening in the fastening wall or support structure, and then the electric motor, or stator bushing, is mounted on the fastening eye that secures the stator bushing to the fastening wall or support structure. This eliminates the need for an additional assembly step for the electronic component housing, as it is no longer necessary to subsequently install it onto the electric motor, or fastening wall or support structure, from the other side.

[0038] Preferably, the cooling channel extension extends axially beyond the radial mounting plane to the vicinity of the air delivery element that rotates with the rotor, creating an axial gap between the cooling channel extension and the air delivery element. In other words, the cooling channel extension extends almost axially to the air delivery element.

[0039] The direction of the air delivery element toward the cooling channel extension or the electronic component housing can be limited or covered by a cover plate. The cover plate can, in particular, be annular. Preferably, the cooling channel extension extends axially until only a small axial sealing gap is created between it and the cover plate of the air delivery element.

[0040] Preferably, the axial region of the outer wall of the electronic component housing opposite the flange section has no cooling channels. The cooling channels are preferably configured not to be circumferential, but rather to be interrupted, at least by, the flange section with the stator bushing fastener. This allows for a compact structure of the electronic component housing and also results in less obstruction to airflow. Attached Figure Description

[0041] There are various possibilities for beneficial designs and modifications to the teachings of this invention. For this purpose, reference can be made, on the one hand, to the dependent claims of claim 1, and on the other hand, to the following explanation of preferred embodiments of the invention with reference to the accompanying drawings. The explanation of preferred embodiments of the invention with reference to the accompanying drawings also illustrates generally preferred designs and modifications to the teachings. In the drawings:

[0042] Figure 1 A perspective view of an electronic component housing according to a first embodiment of the present invention, viewed from the bottom plate side, is shown, showing a cooling channel extension extending beyond the radial mounting plane.

[0043] Figure 2 A perspective view of an electric motor is shown, whose stator bushing has a flange section for axial fastening to the mounting surface of the electronic component housing;

[0044] Figure 3 Show Figure 1 The electronic component housing shown Figure 2 Perspective view of the electric motor in its assembled state;

[0045] Figure 4 Show Figure 1 The electronic component housing shown Figure 2 A cross-sectional view of the electric motor in its assembled state;

[0046] Figure 5 Show Figure 2 A perspective view of the stator bushing of the electric motor shown.

[0047] Figure 6 Show Figure 5 A detailed view of the cooling structure area, schematically showing additional ribs;

[0048] Figure 7 Show Figure 4The detailed view of the cross-section shown indicates the path of the cooling air from the inlet of the cooling channel to the air delivery element;

[0049] Figure 8 Show Figure 7 The detailed view shown indicates the heat dissipation path;

[0050] Figure 9 A perspective view of a cooling channel extension is shown, which is constructed as an independent component in the form of a cooling channel segment.

[0051] Figure 10 A cross-sectional view of a second embodiment of an electronic component housing is shown, which has a cooling channel extension extending beyond the radial mounting plane;

[0052] Figure 11 Show Figure 1 The diagram shows a perspective view of a protective cover on the cover of an electronic component housing, which protects the inlet of the cooling channel, or cooling channel, from blockage.

[0053] Figure 12 A cross-sectional view of a third embodiment of an electronic component housing is shown, in which a cooling channel extension extending beyond the radial mounting plane and a blocked inlet of the cooling channel are shown, and the heat dissipation path is marked.

[0054] Figure 13 Show Figure 11 A perspective view of the cover of the electronic component housing shown, with the cover removed;

[0055] Figure 14 A perspective view of the electronic component housing according to a third embodiment of the present invention, viewed from the bottom plate side;

[0056] Figure 15 Show Figure 14 A perspective view of the electronic component housing and electric motor in their assembled state;

[0057] Figure 16 Show Figure 14 The diagram shows a cross-sectional view of the electronic component housing and electric motor in their assembled state. Detailed Implementation

[0058] Figure 1 This is a perspective view of an electronic component housing 1 according to a first embodiment of the present invention, viewed from the base plate side. The electronic component housing 1 has a partially enclosed base plate 2. The base plate 2 is configured for placing... Figure 1The stator bushing of the electric motor is not shown. Power electronic components, such as semiconductor components, can be thermally connected to the upper side of the base plate 2. The base plate 2 has through holes 3 for motor connection lines or contacts and through holes 4 for components for the electric motor shaft end or for position detection of air delivery components.

[0059] The electronic component housing 1 has a mounting surface 6 on the base plate 2 for axial fastening to the stator bushing of the electric motor. The mounting surface 6 defines a mounting plane 7 extending radially toward the axis of the electric motor.

[0060] The outer wall 9 is substantially cylindrical. Cooling channels 10a and 10b are formed on the outer wall 9 of the electronic component housing 1, extending axially in the direction 11 to guide cooling airflow to the stator bushing of the electric motor. Cooling channel 10a terminates on the mounting plane 7. The electronic component housing 1 has cooling channel extensions 12 for cooling airflow, extending axially beyond the radial mounting plane 7 and forming axial extensions of cooling channels 10b. The cooling channel extensions are arranged along the outer casing of the outer wall 9. Thus, a plurality of cooling channel extensions 12 are arranged around the outer periphery of the electronic component housing 1. Angular spacing is correspondingly formed between each cooling channel extension 12.

[0061] Figure 2 This is a perspective view of the electric motor 15. From the top, the stator bushing 20 with its base plate, or stator bushing flange 21, is visible. The stator bushing flange 21 has a wire hole 23 and a through hole 24, which connects to... Figure 1 The wiring hole 3 and through hole 4 of the electronic component housing 1 are shown to correspond. The wiring hole 3 is not necessarily the same size as the through hole 4, but should have the same position / orientation, and in other words, the shaft end 25 of the electric motor 15 can be seen in the through hole 24. A cooling wheel for cooling the electronic component and / or a magnet for detecting position (not shown) can be fastened to the shaft end 25, for example.

[0062] The electric motor 15 has a rotor cover 26. The centering diameter region 27 is schematically marked with a dashed circle. An air supply element 28 is connected to the rotor, or rotor cover 26, in a torsion-resistant manner, and is limited or covered by a cover plate 29 toward the stator bushing flange 21. A flange section 30 with a hole 31 is constructed on the axial exterior of the stator bushing 20, or stator bushing flange 21, for axial fastening to a fastening wall or support structure (not shown). The flange section 30 defines a support segment and, in other words, forms a support ring (with an interruption) on the stator bushing 20 for the electric motor 15. The electric motor can be centered in the centering diameter region 27 when axially fastened to the support structure.

[0063] Figure 3 Show Figure 1 The electronic component housing 1 and shown Figure 2 This is a perspective view of the electric motor 15 in its assembled state. Radial connecting protrusions 32 are formed on the outer wall 9 of the electronic component housing 1, at which the electronic component housing 1 is fixedly screwed to the stator bushing flange 21. The radial connecting protrusions 32 are located within the centering diameter region 27 of the support structure (not shown), which is limited by a step in the flange section. The region of the outer wall 9 of the electronic component housing 1 that opposes the flange section 30 in the axial direction 11 has no cooling channels. The electronic component housing 1 is located radially inside the flange section 30 of the support ring. The inner diameter of the support ring is larger than the outer diameter of the electronic component housing.

[0064] The cooling channel extension 12 for the cooling channel 10b extends axially 11 beyond the radial mounting plane 7 and extends into the area between the flange sections 30 to the side of the air delivery element 20, thereby creating an axial clearance 34 between the cooling channel extension 12 and the air delivery element 28. The electronic component housing 1 is closed by a separate removable cover 35.

[0065] Figure 4 A cross-sectional view of the electronic component housing and electric motor in an assembled state is shown. A rotor housing 26 surrounds the stator bushing 20 and the core assembly 39 with motor windings, constructed radially outside the stator bushing tower 38 and rotating with the shaft whose end 25 is accessible from the outside of the electronic component housing 1 through through holes 24, 4. The base plate 2 has a cooling body 41. The cooling body 41 is constructed as a deposit of material in the base plate 2 for thermal connection with the stator bushing 20. Power electronic components 43 are schematically shown mounted on the cooling body 41.

[0066] Figure 5 A perspective view of the stator bushing 20 of the electric motor 1 is shown, without showing the core assembly or motor windings, and without showing the rotor cover surrounding the stator bushing tower 38. The stator bushing flange 21 has corrugated ribs 45 that supply elements to the air in the axial direction 11. Figure 5 (Not shown in the image) Extension. Air flowing out from the cooling channel extension of the electronic component housing can be drawn radially inward between the ribs 45 of each waveform for cooling.

[0067] Figure 6 Show Figure 5 A detailed view of the area of ​​the cooling structure, schematically showing the extension of the cooling channel ( Figure 6 Additional ribs 46 (not shown) guide air in the area of ​​the air outlet.

[0068] Figure 7 Adaptation shown Figure 4 A detailed view of the seal 47 between the electronic component housing 1 and the stator bushing 20, which extends radially inward in the cooling channel extension 12.

[0069] Arrows indicate the cooling air path from the inlet 48 of the cooling channel 10b to the air delivery element 28. As the air delivery element 28 rotates with the rotor cover 26, a radially outward airflow is generated by the air delivery ribs 50. This creates a negative pressure at the inlet 48 of the cooling channel 10b, drawing in air. The air passes through the cooling channel 10b (which is limited outward by a radial cover device or wall 51) and through the cooling channel extension 12 to the outlet 52. There, air exits from the cooling channel extension 12 of the electronic component housing 1 and is drawn radially inward by the suction between the corrugated ribs 45 of the stator bushing 20. At the radially inner end 53 of the corrugated ribs 45, the air leaves the stator bushing 20 and enters the air delivery element 28. In the air delivery element 28, the air is then radially outward through the air delivery ribs 50 and discharged radially outward from the outside of the air delivery element 28.

[0070] Figure 8 Basically with Figure 7 The same applies. In addition to the cooling air path, the heat dissipation path is indicated by arrows from the power electronic component 43 through the cooling body 41 in the base plate 2 of the electronic component housing 1 and through the stator bushing flange 21 to the cooling air path. The cooling channel extension 12 is partially closed axially in the region of the outlet 52 because the radial cover device has a radially inwardly pointing protrusion at the outlet 52, shaped like a steering cantilever. Heat transfer between the stator bushing 20 and the cooling body 41 is facilitated by using a schematically shown thermal interface material 54 between the stator bushing and the electronic component housing 1 in the region of the cooling body.

[0071] according to Figure 7 and Figure 8 The cooling channel extension 12 is integrally formed with the outer wall 9 of the electronic component housing.

[0072] Figure 9 In contrast, a structural variation of the cooling channel extension 12 is shown, which is configured as a separate component and can be mounted radially outside the electronic component housing 1. Every three cooling channel extensions 10b are configured as a cooling channel segment 55 along a segment ring 56. The cooling channel segment 55 has an opening 57 on the segment ring in the direction of the cooling channel 10b on the outer wall 9 of the electronic component housing 1.

[0073] Figure 10 A cross-sectional view of the electronic component housing 1 of the second embodiment, together with the electric motor 15, is shown, and in other parts... Figure 7The same as the first embodiment. The difference is that the cooling channel 10b of the electronic component housing 1 first reaches the shoulder end face 60 on the stator bushing flange 21 in the axial direction. This provides additional cooling to the shoulder end face 60 in the stator bushing flange 21. The shoulder end face 60 and... Figure 6 It can be seen that it has an additional rib 46.

[0074] Figure 11 A cover 35, integrally integrated into the electronic component housing 1, is shown. A cover device 62 can be seen that protects the inlet 48 of the cooling channel, preventing further cooling airflow into the inlet 48 in the event of blockage. The cover device 62 has multiple cylindrical pins, or in other words, shaft heads 63. The cover device is preferably made of a material with good thermal conductivity. Furthermore, the increased surface area of ​​the shaft heads can facilitate better heat dissipation.

[0075] Figure 12 A cross-sectional view of the electronic component housing 1 according to the third embodiment is shown, in which a cooling channel extension 12 extending beyond the radial mounting plane 7 is shown. The electronic component housing 1 has, at the inlet 48 of the cooling channel 10b, a... Figure 11 The cover device 62 is shown. A blockage 65 is schematically shown on the cover device 62. In practice, the blockage 65 may appear in the form of a leaf, blade, or similar foreign object. The inlet 48 of the cooling passage 10b is obstructed upwards by the blockage 65, thus hindering the intake of cooling air at the inlet 48. The shaft ends 63 of the cover device 62 are configured as bypass channels in all directions, allowing air to flow between the shaft ends 63 in all directions, particularly in the lateral radial direction. The cooling air paths are indicated by arrows.

[0076] The cooling element 41 is constructed within the cover 35 or the electronic component housing 1. The cooling element 41 is constructed as a material deposit within the cover 35 or the electronic component housing 1 for thermal connection with the cooling channel 10b. A power electronic component 43 is schematically shown mounted on the cooling element 41. Arrows indicate the heat dissipation path from the power electronic component 43 through the cooling element 41 in the cover 35 of the electronic component housing 1 to the cooling air path or cooling channel 10b.

[0077] Figure 13 Show Figure 11 The diagram shows a perspective view of the cover 35 of the electronic component housing, with the cover device removed and not shown. Ribs of the electronic component housing 1 beneath it can be seen, forming cooling channels 10b and their inlets 48.

[0078] Figure 14 and Figure 1The following is essentially the same and shows a perspective view of the electronic component housing 1 according to the third embodiment of the present invention, viewed from the bottom plate side. The electronic component housing 1 has no bottom plate, and the cooling body 41 is constructed in the cover portion 35.

[0079] Figure 15 and Figure 3 Basically the same and shown Figure 14 The diagram shows a perspective view of the electronic component housing 1 and the electric motor 15 in their assembled state. A portion of the cover 35 is configured as a removable connecting chamber cover 67.

[0080] Figure 16 and Figure 4 Basically the same and shown Figure 14 The diagram shows a cross-sectional view of the electronic component housing and electric motor 15 in their assembled state.

[0081] For further advantageous improvements to the device according to the invention, reference may be made to the general portion of the specification and the appended claims to avoid repetition.

[0082] Finally, it should be specifically noted that the foregoing embodiments of the device according to the present invention are only for illustrating the teachings of the claims, but do not limit these embodiments.

[0083] List of reference numerals

[0084] 1. Electronic component housing

[0085] 2. Base plate

[0086] 3. Threading hole

[0087] 4 Through holes

[0088] 6 Assembly surfaces

[0089] 7 Assembly plane

[0090] 9 outer wall

[0091] 10 Cooling Channels

[0092] 11 Axial direction

[0093] 12 Cooling aisle extension

[0094] 15 Electric motors

[0095] 20 Stator Bushing

[0096] 21 Stator Bushing Flange

[0097] 23 Threading Holes

[0098] 24 Through holes

[0099] 25 Shaft end

[0100] 26 Rotor Cover

[0101] 27 pairs of medium diameter regions

[0102] 28 Air delivery components

[0103] 29 Cover plate

[0104] 30 Flange Section

[0105] 31 holes

[0106] 32 Connecting protrusion

[0107] 34 gap

[0108] 35 cover

[0109] 38 Stator Bushing Tower

[0110] 39. Iron core assembly with motor winding

[0111] 41 cooling body

[0112] 43 Power Electronic Components

[0113] 45 Wave-shaped fins

[0114] 46 additional ribs

[0115] 48 Entrances

[0116] 50 Air delivery ribs

[0117] 51 Radial Cover Equipment

[0118] 52 Air outlet

[0119] 53 Radial inner end

[0120] 54 Interface Materials

[0121] 55 Cooling Channel Sections

[0122] 56-segment ring

[0123] 57 Opening

[0124] 60 Shaft shoulder end face

[0125] 62 Protective Cover Equipment

[0126] 63 shaft head

[0127] 65. Blockage

[0128] 67 Connecting chamber cover

Claims

1. An electronic component housing (1) for an electric motor (15), wherein, The electronic component housing (1) has a mounting surface (6) for axial fastening to the stator bushing (20) of the electric motor (15), wherein the mounting surface (6) defines a mounting plane (7) extending radially toward the axis of the electric motor (15). The outer wall (9) of the electronic component housing (1) is provided with at least one cooling channel (10a, 10b), which extends at least partially along the axial direction (11) and is configured to guide cooling airflow to the stator bushing (20) of the electric motor (15). The electronic component housing (1) is characterized in that it has a cooling channel extension (12) for cooling airflow, which extends beyond the radial mounting plane (7) in the axial direction (11) and constitutes an axial extension of the cooling channel (10b).

2. The electronic component housing (1) according to claim 1, wherein, The cooling channel extension (12) has a wall (51) that radially outwards and / or inwardly limits the cooling channel (10b). The wall (51) is preferably installed as an independent component on the cooling channels (10a, 10b).

3. The electronic component housing (1) according to claim 1 or 2, in, The cooling channel extension (12) is at least partially closed in the axial direction in the area of ​​the air outlet (52).

4. The electronic component housing (1) according to any one of claims 1 to 3, in, The cooling channel extension is constructed as an independent component relative to the electronic component housing (1).

5. The electronic component housing (1) according to any one of claims 1 to 4, in, A seal (47) that extends substantially along the assembly plane (7) extends radially inward between the electronic component housing (1) and the stator bushing (20) in the cooling channel extension (12).

6. The electronic component housing (1) according to any one of claims 1 to 5, further comprising: A base plate (2) and / or a cover (35) that extends substantially radially.

7. The electronic component housing (1) according to any one of claims 1 to 6, in, The base plate (20) and / or cover (35) have a cooling body (41). Preferably, a thermal interface material (54) is provided between the base plate (29) and the stator bushing (20), particularly in the region of the cooling body (41).

8. The electronic component housing (1) according to any one of claims 1 to 7, in, The electronic component housing (1) has a cover device (62) at the entrance (48) of the cooling channel (12), which protects the entrance (48) of the cooling channel (10a, 10b) to prevent cooling air from entering the entrance in the presence of a blockage (65).

9. A cover device (62) for an electronic component housing according to claim 8, in, The cover device (62) has a plurality of cylindrical pins and / or corrugated parts.

10. An electric motor (15) comprising an electronic component housing (1) according to any one of claims 1 to 8.

11. The electric motor (15) according to claim 10, further comprising: A stator with stator bushing (20), and A rotor having a rotor cover (26), wherein the rotor cover (26) is configured to surround the stator bushing (20) radially outside the stator bushing tower (38). The stator bushing (20) has a flange section (30) on its radially outer side for axial fastening to a fastening wall or support structure.

12. The electric motor (15) according to claim 10 or 11, wherein, The cooling channel extension (12) is disposed between the flange sections (20) used for axially fastening the stator bushing (20) along the direction surrounding the outer periphery of the electronic component housing (1). The cooling channel extension (12) is preferably located radially inside the diameter region defined by the flange section (30) or the support ring.

13. The electric motor (15) according to any one of claims 10 to 12, in, The cooling channel extension (12) extends axially beyond the radial mounting plane (7) to the side of the air delivery element (28) that rotates with the rotor, so that an axial gap (34) is formed between the cooling channel extension (12) and the air delivery element (28), preferably between the cover plate of the cooling channel extension (12) and the air delivery element.

14. The electric motor (15) according to any one of claims 10 to 12, in, There is no cooling channel in the area of ​​the outer wall (9) of the electronic component housing (1) opposite the flange section (30) in the axial direction (11).

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