DE102018215801A1 - Electronics module, power electronics and motor vehicle - Google Patents

Abstract

The invention relates to an electronic module (1) comprising a magnetic core (2) and at least two current conductors (3, 4), the at least two current conductors (3, 4) being guided through an opening (2'9 of the magnetic core (2) wherein a magnetic field can be generated by means of a current flow along the at least two current conductors (3, 4) and at least the magnetic core (2) is arranged within a housing (5) of the electronic module (1). Characterized in that the electronics module (1) further comprises a current sensor (6) for detecting a current intensity of the current flow along the at least two current conductors (3, 4).

Description

The invention relates to an electronic module according to the preamble of claim 1 and a corresponding power electronics and a corresponding motor vehicle.

In the prior art, so-called EMC filters (“electromagnetic compatibility filters”) are known, which are also used in particular in automotive applications to comply with the relevant EMC regulations. These EMC filters are designed to dampen high-frequency electromagnetic interference, e.g. arise during the operation of an inverter and spread in electrical conductors. They are usually made up of EMC chokes and capacitors. The EMC chokes usually consist of one or more electrical conductors, e.g. in the form of a wire or a busbar, which is separated by a magnetic core, e.g. in the form of a ring. Because of the usually high currents and the resulting heat development, the current conductors often have to be designed with a comparatively large cross section. Soft magnetic materials, e.g. Ferrites or suitable nanocrystalline materials, for use. The latter have a significantly higher filter effect. The capacitors can be connected upstream or downstream of the choke. They are arranged electrically either between the electrical conductors of the EMC choke (so-called X capacitor) or between each electrical conductor of the choke and an electrical reference potential (so-called Y capacitor). They are often mechanically integrated into the electronic component carrier.

In this context the WO 2017/211951 A1 an active interference suppression device for reducing a disturbance variable on an electrical line of a partially or completely electrically driven motor vehicle. The disturbance is an interference current that is generated by power electronics. The current in the electrical line can be measured by means of a current sensor and certain frequency ranges of the interference current can be filtered by means of a frequency filter.

From the WO 2010/079074 A1 A method for controlling a power supply device for at least one electrical machine with at least one storage device for electrical energy and with an inverter comprising at least one choke for an electric vehicle is known.

The DE 10 2004 039 230 A1 describes a method for producing an inductive component, in which two individual parts of a current conductor are pushed independently of one another through an inner hole of a magnetic core and are then aligned with one another in such a way that they have areas that overlap with one another. Then the two parts are firmly connected to each other at the overlapping areas.

However, the known devices and methods are disadvantageous in that the soft magnetic core material of the choke, particularly when it is nanocrystalline material, is comparatively fragile and sensitive to pressure. For this reason, the core is usually embedded in a plastic housing. A further plastic housing is then necessary for the mechanical connection, for example to the housing of the inverter or to a carrier plate. This creates interfaces that generate manufacturing costs. In addition, with a number of turns of only " 1 “A comparatively large core is necessary to achieve a sufficient filter effect. This is also associated with comparatively high manufacturing costs. The size of the core can be significantly reduced by increasing the number of turns. However, since in high-current applications, for example in electric vehicles, current conductors with a large cross section generally have to be used due to the development of heat, however, several turns can only be produced by complex deformation of the current conductors. If current conductors with a smaller cross section are to be used, the windings must be cooled. In both cases there are also high costs and often this is not technically possible. Furthermore, both the costs and the space requirement increase due to the current sensor unit, which is usually arranged separately from the filter, which is inevitably required for current measurement, and the additional current conductors required for the electrical connection of the current sensor unit.

It is an object of the invention to propose an improved electronics module.

This object is achieved by the electronics module according to claim 1. Advantageous refinements and developments of the invention emerge from the dependent claims.

The invention relates to an electronic module comprising a magnetic core and at least two current conductors, the at least two current conductors being guided through an opening in the magnetic core, a magnetic field being able to be generated by means of a current flow along the at least two current conductors, and at least the magnetic core being inside a housing of the electronic module is arranged. The The electronic module according to the invention is characterized in that the electronic module further comprises a current sensor for detecting a current intensity of the current flow along the at least two current conductors.

The structural integration of the current sensor into the electronic module according to the invention initially has the advantage that additional current conductors which are usually provided for integrating the current sensor can be dispensed with. This saves costs and space equally.

It is preferably provided that the current sensor is arranged inside the housing. Alternatively, the current sensor is preferably arranged on an outside of the housing.

The at least two current conductors, in conjunction with the magnetic core, constitute a so-called electromagnetic compatibility filter (EMC filter). The invention thus extends a known EMC filter by a structurally integrated current sensor for measuring a current in the at least two current conductors.

The housing is preferably formed in one part, two parts or also in several parts and molded onto the core, the at least two current conductors and the current sensor in such a way that positioning pins which are usually provided can be dispensed with.

The housing particularly preferably has so-called snap hooks, which enable simple assembly of the individual housing parts with one another and also enable simple assembly of the core or the current conductors on the housing.

In addition, the housing preferably has fastening tabs or fastening openings through which the housing, e.g. can be attached to another device by means of screws or other suitable fastening means. For example, the electronics module can be connected to power electronics or an inverter via the housing in this way.

The current conductors are advantageously arranged in or on the housing such that they enable the simplest possible form of current conductor and at the same time run in a space-saving manner. As a result, the inner diameter of the core can be made comparatively small.

The shape of the core is preferably circular or also elliptical and the arrangement of the core in the housing can be either lying or standing.

It is preferably provided that the separate protective housing of the core that is usually required is dispensed with. Instead, the core is inserted directly into the housing.

The at least two current conductors are preferably designed as metallic current conductors. It is particularly preferred to use strip-shaped stamped parts which have been stamped from a sheet metal. They can have a rectangular cross section and, depending on the electrical conductivity required, have a greater or lesser material thickness or cross-sectional area. Possibly. they can also be painted to provide some electrical insulation.

According to a preferred embodiment of the invention, it is provided that the current sensor is designed as an inductive current sensor which detects the current strength on the basis of the magnetic field. This has the advantage of a contactless and interaction-free current measurement. The current sensor does not affect the current strength. In addition, an inductive current sensor is comparatively compact. Additional power lines to the current sensor are also advantageously not required.

According to a further preferred embodiment of the invention, it is provided that the current sensor is at an identical distance from the at least two current conductors. This has the advantage that the lines of the magnetic field penetrate the current sensor as evenly and as straight as possible, which in turn leads to comparatively precise measurement results.

According to a particularly preferred embodiment of the invention, it is provided that the current sensor comprises a U-shaped and metallic plate, the plate comprising one of the at least two current conductors from three sides. In this case, the current intensity is measured only on one of the at least two current conductors. By enclosing the current conductor in a U-shape on three sides, the magnetic field lines are strengthened and aligned in a straight line. This further improves the measurement accuracy of the current sensor. In addition, the U-shape of the sheet enables a comparatively simple arrangement of the current sensor around the current conductor over the open side of the sheet.

According to a further preferred embodiment of the invention, it is provided that the at least two current conductors each consist of at least two individual sections, the sections being connected at an angle to one another such that they each represent a turn through the core. The size of the comparatively expensive core can namely advantageously be reduced by Windings of the at least two current conductors are generated by the core. It has been found that such windings can be produced comparatively easily by connecting two or more correspondingly preformed sections after their passage through the core, for example by means of welding, in particular by means of laser welding. This type of production of turns through the core is significantly less expensive than passing one-piece current conductors through the core and then bending the current conductors, as is often the case in the prior art.

The individual sections are preferably connected to one another in such a way that the connection points have an angle of 90 °.

According to a further preferred embodiment of the invention, it is provided that the at least two current conductors each consist of a plurality of sections, the sections being connected at an angle to one another in such a way that they each represent a plurality of turns through the core. The greater the number of sections of each conductor, the greater the flexibility in the arrangement of the conductors in the core. As a result, a larger number of turns can be realized by the core per conductor and the conductors can be arranged in a comparatively space-saving manner.

According to a further preferred embodiment of the invention, it is provided that the housing carries the at least two current conductors, the current conductors being arranged in such a way that there is an air gap between connection points of the sections and the housing. This has the advantage that the housing specifies the exact position of the at least two current conductors and in particular the individual sections of the at least two current conductors and offers corresponding mounting options, for example by means of snap hooks, which fix the current conductors comparatively easily as soon as they have been brought into position.

The subsequent connection or welding of the individual sections also stabilizes the housing and improves its strength, since the current conductors are connected to the housing in a load-bearing manner.

Since there is an air gap between the connection points between the sections and the housing, the sections can be welded in a particularly simple manner, since only a greatly reduced heat transfer into the housing, which is usually made of plastic, takes place. Thus, the individual sections can advantageously only be welded to one another after they have been arranged in or on the housing, damage to the housing being avoided at the same time. The welding process as such can also be accelerated, since the connection points reach the temperature required for welding comparatively quickly due to the reduced heat dissipation and keep it even with a comparatively lower energy supply.

According to a further preferred embodiment of the invention, it is provided that the electronic module also comprises at least one capacitor, the at least one capacitor being arranged either between the at least two current conductors or between a current rail and an electrical reference potential. Depending on their arrangement, the capacitors are either referred to as X capacitors (arrangement between the at least two current conductors) or as Y capacitors (arrangement between a busbar and an electrical reference potential). The capacitors can partially absorb current peaks and high-frequency current fluctuations and thus further improve the effect of the EMC filter. The capacitors are preferably arranged in the housing or on the housing.

The reference potential is preferably a neutral conductor which is at the “zero” electrical potential. E.g. the housing can have such a neutral conductor, in which case the housing can in turn be connected to a corresponding electrical “zero” potential. Such a connection can e.g. via the mechanical connection of the housing to another device, in particular when the housing is connected to the further device by means of metallic screws or other highly conductive fastening means.

According to a further preferred embodiment of the invention, it is provided that the at least two current conductors are in a heat-conducting connection with a heat sink. This results in the advantage that the at least two current conductors experience an improved cooling effect during operation of the electronic module, whereby the at least two current conductors can in turn be dimensioned smaller and more space-saving, without the at least two current conductors or the electronic module being damaged by overheating , a so-called "burnout" can be avoided. The undesirable effect of the ever increasing heating of the current conductors at high currents and the electrical resistance of the current conductors, which in turn increases with temperature, which consequently leads to further heating, etc., can thus be prevented.

The heat sink is preferably designed as a metallic foil or as a metallic sheet, wherein the film or sheet is in mechanical connection with a length section of the at least two current conductors. The larger the length section, the better the heat dissipation from the current conductors into the heat sink.

The metal of the foil or sheet is preferably copper or another metal with a comparatively large heat capacity and a comparatively good thermal conductivity. The greater the thermal capacity, the more heat the foil or sheet can absorb. The better the thermal conductivity, the better the foil or sheet can absorb and dissipate the heat.

As an alternative, the heat sink is preferably made of a material that is a very good thermal conductor and as electrically non-conductive as possible, such as certain plastics. Diamond also has very good thermal conductivity with very low electrical conductivity.

The heat sink is also advantageously integrated into the housing or arranged on an outside of the housing. Overall, the electronic module is structurally very compact, despite the large number of components.

According to a particularly preferred embodiment of the invention, it is provided that the heat sink is in heat-conducting connection with a surface of the housing. This has the advantage that the heat sink can in turn release the heat supplied by the at least two current conductors to the housing. This improves the overall cooling effect, since in this way the heat capacity of the housing increases the heat capacity of the heat sink.

The heat sink can particularly preferably also be designed as an actively coolable Peltier element. This offers a further improved cooling effect.

According to a further preferred embodiment of the invention, it is provided that the heat sink, the core, the at least two current conductors, the current sensor and the at least one capacitor are arranged inside the housing or are arranged outside the housing on the housing. This results in the advantage of a very compact and space-saving construction of the electronic module, roughly comparable to the construction and space requirement of known EMC filters. In contrast to these, however, the electronics module additionally provides a current sensor for detecting the current intensity of a current flow along the at least two current conductors and a cooling function for the at least two current conductors.

The invention further relates to power electronics for a motor vehicle, comprising an inverter and an electronic module according to the invention. The advantages already mentioned in connection with the electronic module according to the invention also result for the power electronics according to the invention.

Such power electronics are preferably used for an electric drive train of an at least partially electrically operated motor vehicle. So it is a so-called hybrid vehicle or a pure electric vehicle. Powerful electric motors are required to operate such vehicles, which require comparatively high electrical currents. The high currents and the fast switching speeds of the power electronics, which converts the direct current of the vehicle battery using an inverter, usually produce strong electromagnetic vibrations, which not only spread within the conductor structures of the vehicle, but can also be radiated. At the same time, there is usually only a limited amount of space available, with high cost pressure at the same time. The electronic arrangement according to the invention meets all of these problems equally effectively.

Finally, the invention also relates to a motor vehicle, comprising power electronics according to the invention. The motor vehicle is preferably a so-called hybrid vehicle or a pure electric vehicle.

In the following, the invention is explained by way of example using the embodiments shown in the figures.

• 1 beispielhaft und schematisch eine mögliche Ausbildungsform eines erfindungsgemäßen Elektronikmoduls,
• 2 beispielhaft und schematisch eine erste mögliche Anordnungsform des Stromsensors bei den Stromleitern,
• 3 beispielhaft und schematisch eine zweite mögliche Anordnungsform des Stromsensors bei den Stromleitern,
• 4 beispielhaft und schematisch eine weitere mögliche Ausbildungsform eines erfindungsgemäßen Elektronikmoduls,
• 5 beispielhaft und schematisch eine weitere mögliche Ausbildungsform eines erfindungsgemäßen Elektronikmoduls,
• 6 das Elektronikmodul der 5, wobei das Gehäuse für die Darstellung der 6 entfernt wurde,
• 7 ebenfalls das Elektronikmodul der 5, wobei 7a eine Ansicht des Elektronikmoduls von unten zeigt und 7b eine Schrägsicht auf das Elektronikmodul ohne Gehäuse zeigt,
• 8 ebenfalls das Elektronikmodul der 5, wobei 8a eine Ansicht des Elektronikmoduls von unten zeigt und 8b eine Schrägsicht auf das Elektronikmodul ohne Gehäuse zeigt,
• 9 beispielhaft und schematisch eine weitere mögliche Ausbildungsform eines erfindungsgemäßen Elektronikmoduls,
• 10 das Elektronikmodul der 9, wobei das Gehäuse für die Darstellung der 10 entfernt wurde,
• 11 beispielhaft und schematisch eine weitere mögliche Ausbildungsform eines erfindungsgemäßen Elektronikmoduls und
• 12 das Elektronikmodul der 11, wobei das Gehäuse für die Darstellung der 12 entfernt wurde.

Show it:

• 1 exemplary and schematic of a possible embodiment of an electronic module according to the invention,
• 2nd by way of example and schematically, a first possible arrangement of the current sensor in the current conductors,
• 3rd exemplary and schematic of a second possible arrangement of the current sensor in the current conductors,
• 4th another possible embodiment of an electronic module according to the invention, by way of example and schematically,
• 5 another possible embodiment of an electronic module according to the invention, by way of example and schematically,
• 6 the electronics module of the 5 , the housing for the representation of the 6 was removed,
• 7 also the electronics module of the 5 , in which 7a a view of the electronics module from below and 7b shows an oblique view of the electronics module without housing,
• 8th also the electronics module of the 5 , in which 8a a view of the electronics module from below and 8b shows an oblique view of the electronics module without housing,
• 9 another possible embodiment of an electronic module according to the invention, by way of example and schematically,
• 10th the electronics module of the 9 , the housing for the representation of the 10th was removed,
• 11 another possible embodiment of an electronic module according to the invention and
• 12th the electronics module of the 11 , the housing for the representation of the 12th was removed.

The same objects, functional units and comparable components are identified with the same reference symbols in all figures. The technical features of these objects, functional units and comparable components are identical, unless the description expressly or implicitly states otherwise.

1 shows an example and schematically a possible embodiment of an electronic module according to the invention 1 . The electronics module 1 includes a magnetic core 2nd and two power conductors 3rd and 4th , the two conductors 3rd and 4th through an opening 2 ' of the core 2nd are led. As can be seen, the two conductors are 3rd and 4th even twice through the core 3rd guided so that they each make a turn through the core 2nd or around the core 2nd represent. Since the production of such windings is technically complex and correspondingly expensive, especially in confined spaces such as in the electronic module according to the invention 1 , there are two conductors 3rd and 4th each from at least two individual sections (not shown in 1 ), which are connected at such an angle that they each have the winding shown through the core 2nd cause. Since the electronic module according to the invention 1 A function as an EMC filter, among other things, can improve the effectiveness of EMC filtering. In operation of the electronic module 1 a current flows along the two conductors 3rd and 4th , which creates a magnetic field. The core 2nd and the conductor 3rd and 4th are within one housing 5 arranged. This housing 5 also includes a current sensor 6 for detecting a current intensity of the current flow along the at least two current conductors 3rd and 4th . The current sensor 6 is designed, for example, such that it is one of the two current conductors 3rd and 4th , for example the conductor 3rd , from three sides using a U-shaped and metallic sheet 6 ' includes. Since it is according to the example of 1 an inductive current sensor 6 the current sensor detects 6 the current in the conductor 3rd non-contact based on the generated magnetic field in the sheet 6 ' . By placing the fourth side of the sheet 6 ' is open, the current sensor can 6 or the sheet 6 ' comparatively easy via the current conductor 3rd be pushed to record the current there. Because the conductor 3rd and the conductor 4th Representing supply and discharge lines of electricity for a common consumer from a common source flows in both conductors 3rd and 4th a current flow of identical current at all times. As can also be seen, the electronics module includes 1 in the housing 5 a capacitor 7 which with the conductors 3rd and 4th is electrically connected. The condenser 7 improves the filtering effect of the EMC functionality of the electronic module 1 . For example, all are in 1 shown components of the electronic module 1 , namely the core 2nd who have favourited two conductors 3rd and 4th , the current sensor 6 and the capacitor 7 inside the case 5 arranged. The electronics module 1 is therefore very compact and space-saving, but also has the current sensor compared to known EMC filters 6 for measuring the current intensity of the current flow along the current conductors 3rd and 4th ready.

2nd shows an example and schematically a first possible form of arrangement of the current sensor 6 with the current conductors 3rd and 4th . For example, it is an inductive current sensor 6 which to the two conductors 3rd and 4th each has an identical distance. This leads to a penetration of the current sensor that is as uniform as possible 6 with the generated magnetic field lines 9 (please refer 2a) , which in turn improves measurement accuracy. As can still be seen, the current sensor 6 , as well as a length section of the two current conductors 3rd and 4th , on a PCB circuit board 8th arranged. This favors a reliable attachment of the current sensor 6 at a defined distance from the current conductors 3rd and 4th . As in 2a you can also see the current sensor 6 for example on that of the conductors 3rd and 4th opposite side of the PCB circuit board 8th arranged. This results in a simplified arrangement of the current sensor 6 . Alternatively, the current sensor 6 but also on the same side as the conductor 3rd and 4th to be ordered. The PCB circuit board is exemplary 8th on an outside of the in 2nd arranged housing, not shown.

3rd shows an example and schematically a second possible arrangement form of the current sensor 6 with the current conductors 3rd and 4th . As in 3b can be clearly seen, includes the current sensor 6 a U-shaped and metallic sheet 6 ' , the sheet 6 ' the conductor 3rd on three sides. By the sheet 6 ' the conductor 3rd Covered in a U-shape, are those of the conductor 3rd outgoing field lines 9 straight in the area of the current sensor 6 aligned and amplified so that the current sensor 6 has a further improved measurement accuracy, because the field lines 9 the current sensor 6 go straight and even. The current sensor 6 is laterally centered on the conductor 3rd arranged and from this only by the PCB circuit board 8th Cut.

4th shows an example and schematically another possible embodiment of an electronic module according to the invention 1 . In the representation of the 4th is the electronics module 1 only to begin with: the core can be seen 2nd through which the conductor 3rd and 4th are guided, as well as a single wall of the housing 5 . The conductor 3rd and 4th each form a turn around the core 3rd , so that they are also led over the outside. For better heat dissipation or cooling of the current conductors 3rd and 4th they are located over a certain length section with a heat sink 10th in thermal connection. At the heat sink 10th for example, it is a copper sheet 10th which is part of the current flow in the conductors 3rd and 4th absorbs heat generated and due to its comparatively large surface area can better release it to the environment. There is also a heat sink 10th also with the housing 5 in thermal connection so that a portion of that from the heat sink 10th absorbed heat directly to the housing 5 can be delivered. This results in an improved cooling effect for the current conductors 3rd and 4th .

5 shows an example and schematically another possible embodiment of the electronic module according to the invention 1 . You can see the electronics module 1 in an oblique view from above ( 5a) as well as in an oblique view from below ( 5b) . The housing 5 houses a core, not shown 2nd on. On the case 5 as well as partially in the housing 5 are the current conductors 3rd and 4th arranged. On top of the case 5 there is also a capacitor 7 . On a bottom of the case 5 is a PCB circuit board 8th arranged, which is a current sensor, not shown 6 wearing. Around the magnetic field lines in the area of the current sensor, not shown 6 to reinforce the conductors 3rd and 4th in the area of the current sensor 6 a reduced distance from each other. Fastening openings can also be seen 11 through which the housing 5 can be attached by means of screws to a further device, not shown.

6 shows the electronics module 1 the 5 , the housing 5 for the representation of the 6 was removed. In 6a and 6b can be seen from different perspectives, like the conductor 3rd and 4th through the core 2nd are guided and each have a turn. You can also see that the conductor 3rd and 4th consist of a large number of sections, the sections being connected at an angle such that they each represent a turn through the core. The connection points each have an angle of 90 °, so that the current conductors 3rd and 4th no longer need to be reshaped after the individual sections through the core 2nd were performed. Instead, the individual sections are initially in the core 2nd or on the housing 5 arranged and, according to the example, subsequently firmly connected by means of laser welding. In 6c are the current conductors 3rd and 4th for the sake of clarity without the core 2nd shown.

7 also shows the electronics module 1 the 5 , in which 7a a view of the electronics module 1 from below shows and 7b an oblique view of the electronics module 1 without housing 5 shows. In the embodiment of the 7 is the current sensor 6 in the middle above the current conductor 3rd and 4th arranged so that it leads to both conductors 3rd and 4th has an identical distance. To keep the distance as short as possible and the field strength of the magnetic field lines 9 in the area of the current sensor 6 The current conductors should be reinforced as far as possible 3rd and 4th in the area of the current sensor 6 arranged with a comparatively reduced distance from each other. In this case, too, is the current sensor 6 on a PCB circuit board 8th arranged, which in turn on the conductors 3rd and 4th is arranged. The PCB circuit board 8th also has a power connector 12th on which, according to the example, the conductor 4th contacted electrically conductive. The PCB circuit board 8th is mechanically strong with an outside of the housing 5 connected.

8th also shows the electronics module 1 the 5 , in which 8a a view of the electronics module 1 from below shows and 8b an oblique view of the electronics module 1 without housing 5 shows. Contrary to the representation of the 7 points the electronics module 1 the 8th however a current sensor 6 on which is a U-shaped and metallic sheet 6 ' comprises, the sheet 6 ' the conductor 3rd on three sides.

9 shows an example and schematically another possible embodiment of the electronic module according to the invention 1 . You can see the electronics module 1 in an oblique view from above ( 9a) as well as in an oblique view from below ( 9b) . The electronics module of the 9 corresponds essentially to the electronics module 1 the 5 and includes in particular the same components: the core, not shown 2nd , the housing 5 who have favourited Conductors 3rd and 4th , the capacitor 7 as well as the PCB circuit board 8th with the current sensor 6 and the power connector 12th . A heat sink is not included 10th , however, this could be easily done on the housing if necessary 5 to be ordered. The housing has on its underside 5 also openings for the current conductors 3rd and 4th so that this can be done easily with a heat sink, not shown 10th can be brought into thermal connection. To improve the heat dissipation, the current conductors 3rd and 4th for this purpose, a flattened contact surface in the area of the openings.

10th shows the electronics module 1 the 9 , the housing 5 for the representation of the 10th was removed. In 10a and 10b can be seen from different perspectives, like the conductor 3rd and 4th through the core 2nd are guided and each have a turn. You can also see that the conductor 3rd and 4th each consist of a plurality of sections, the sections being connected at an angle to one another in such a way that they represent a turn through the core. The connection points each have an angle of 90 °, so that the current conductors 3rd and 4th no longer need to be reshaped after the individual sections through the core 2nd were performed. Instead, the individual sections are initially in the core 2nd or on the housing 5 arranged and, according to the example, subsequently firmly connected by means of laser welding. In 10c are the current conductors 3rd and 4th for the sake of clarity without the core 2nd shown.

11 shows an example and schematically another possible embodiment of the electronic module according to the invention 1 . You can see the electronics module 1 in a side view ( 11 a) , an oblique view from above ( 11b) as well as in an oblique view from below ( 11c ). The electronics module of the 11 corresponds essentially to the electronics module 1 the 5 and the electronics module 1 the 9 and includes in particular the same components: the core, not shown 2nd , the housing 5 who have favourited Conductors 3rd and 4th , the capacitor 7 as well as the PCB circuit board 8th with the current sensor 6 and the power connector 12th . A heat sink is also included 10th .

12th shows the electronics module 1 the 11 , the housing 5 for the representation of the 12th was removed. In 12a and 12b can be seen from different perspectives, like the conductor 3rd and 4th through the core 2nd are guided and each have a turn. You can also see that the conductor 3rd and 4th each consist of a plurality of sections, the sections being connected at an angle to one another in such a way that they represent a turn through the core. The connection points each have an angle of 90 °, so that the current conductors 3rd and 4th no longer need to be reshaped after the individual sections through the core 2nd were performed. Instead, the individual sections are initially in the core 2nd or on the housing 5 arranged and, according to the example, subsequently firmly connected by means of laser welding. In 12c are the current conductors 3rd and 4th for better clarity without the core 2nd shown.

Reference list

1

Electronics module

2nd

magnetic core

2 '

Opening of the core

3rd

Conductor

4th

Conductor

5

casing

6

Current sensor

6

U-shaped, metal sheet

7

capacitor

8th

PCB circuit board

9

magnetic field lines

10th

Heat sink

11

opening

12th

Power connection

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• WO 2017/211951 A1 [0003]
• WO 2010/079074 A1 [0004]
• DE 102004039230 A1 [0005]

Claims (12)

Electronic module (1), comprising a magnetic core (2) and at least two current conductors (3, 4), the at least two current conductors (3, 4) being guided through an opening (2'9 of the magnetic core (2), whereby by means of of a current flow along the at least two current conductors (3, 4), a magnetic field can be generated and wherein at least the magnetic core (2) is arranged within a housing (5) of the electronic module (1), characterized in that the electronic module (1) continues comprises a current sensor (6) for detecting a current intensity of the current flow along the at least two current conductors (3, 4). Electronics module (1) after Claim 1 , characterized in that the current sensor (6) is designed as an inductive current sensor (6) which detects the current strength on the basis of the magnetic field. Electronic module (1) according to at least one of the Claims 1 and 2nd , characterized in that the current sensor (6) is at an identical distance from the at least two current conductors (3, 4). Electronic module (1) according to at least one of the Claims 1 and 2nd characterized in that the current sensor (6) comprises a U-shaped and metallic sheet (6 '), the sheet (6') comprising one of the at least two current conductors (3, 4) from three sides. Electronic module (1) according to at least one of the Claims 1 to 4th , characterized in that the at least two current conductors (3, 4) each consist of at least two individual sections, the sections being connected at an angle such that they each represent a turn through the core (2). Electronic module (1) according to at least one of the Claims 1 to 5 , characterized in that the at least two current conductors (3, 4) each consist of a plurality of sections, the sections being connected at an angle such that they each represent a plurality of turns through the core (2). Electronic module (1) according to at least one of the Claims 5 and 6 , characterized in that the housing (2) carries the at least two current conductors (3, 4), the current conductors (3, 4) being arranged such that there is an air gap between the connection points of the sections and the housing (5). Electronic module (1) according to at least one of the Claims 1 to 7 , characterized in that the electronic module (1) also comprises at least one capacitor (7), the at least one capacitor (7) either between the at least two current conductors (3, 4) or between a current conductor (3, 4) and an electrical one Reference potential is arranged. Electronic module (1) according to at least one of the Claims 1 to 8th , characterized in that the at least two current conductors (3, 4) are in heat-conducting connection with a heat sink (10). Electronics module (1) after Claim 9 , characterized in that the heat sink (10) is in heat-conducting connection with a surface of the housing (5). Power electronics for a motor vehicle, comprising an inverter and an electronics module (1) according to at least one of the Claims 1 to 10th . Motor vehicle, comprising a power electronics Claim 11 .

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