WO2018149658A1

WO2018149658A1 - Control electronics having a magnetic flux guide element

Info

Publication number: WO2018149658A1
Application number: PCT/EP2018/052590
Authority: WO
Inventors: Ilya Kuperberg; Michael Wendl; Jivan Kapoor
Original assignee: Robert Bosch Gmbh
Priority date: 2017-02-17
Filing date: 2018-02-02
Publication date: 2018-08-23
Also published as: DE112018000891A5; DE102017202592A1; CN110326066A

Abstract

The invention relates to control electronics (1) for actuating a consumer (5) in a vehicle, in particular an electric motor, having a circuit board (20) and a rod core choke (10), wherein the rod core choke (10) has a rod core (12) and an electrical conductor (14), which forms a winding wound about the rod core (12). According to the invention, the control electronics (1) are designed to receive a magnetic flux guide element (50), which guides the magnetic flux produced by the rod core choke (10).

Description

Description title

Control electronics with a magnetic flux guide element

The invention relates to an electronic control system for controlling a consumer in a vehicle with a printed circuit board, a rod core choke and a magnetic flux guide element.

State of the art

It is known for caching of energy, for impedance matching or filtering to use a throttle. Also, various types of chokes with different properties are known. The rod core choke is a very cost-effective throttle, but must be contacted very expensive electrically and mechanically. Rod core chokes, for example, welded to a substrate or held by push-through mounting on a support. There are thus more components or intermediate steps in the production necessary, which lead to an increase in costs.

Disclosure of the invention

An advantage of the control electronics according to the invention is that the

Control electronics has a magnetic flux guide element. The

Magnetic flux guide element is adapted to receive and guide the magnetic flux generated by the rod core choke. An advantageous reduction of stray fields is achieved. Depending on the design of the magnetic guide element, a large number of limit values for magnetic field emission can be met without requiring several variations of the printed circuit board or variations of the electrical components.

It is advantageous that the magnetic flux guide element after arrangement on the printed circuit board or on the rod core choke emitted a reduction of Magnetic field emission causes. Furthermore, it is not a closed core

necessary according to a storage throttle.

The measures listed in the dependent claims, advantageous refinements and improvements of the main claim features.

It is particularly advantageous that the at least partially, in particular complete arrangement of the rod core choke within a recess in a printed circuit board causes, for example, better solderability, better testability, better heat dissipation, better vibration resistance and a reduction of the installation space.

It is particularly advantageous that the rod core choke protrudes through the recess or the characteristic in the printed circuit board. The recess is

preferably formed throughout. The rod core choke is arranged within the recess, or introduced such that it at least partially on both sides of the circuit board, in particular in the direction perpendicular to

Surface of the circuit board, sticking out of the circuit board.

It is advantageous that the electrical conductor of the rod core choke has at least two connection regions, wherein each connection region has at least one connection surface. The pads allow an electrical and mechanical connection, in particular by means of soldering, of the electrical conductor to the printed circuit board.

It is particularly advantageous that the magnetic flux guide element is arranged completely on one side of the printed circuit board, which represents a cost-effective and easy to supplement solution. The magnetic flux guide element can be retrofitted easily and inexpensively. There is a simple configuration of the magnetic flux guide element. Furthermore, the

Magnetic flux guide element simply on the circuit board or the

Bar core choke are mounted. It is particularly advantageous that the magnetic flux guide element is U-shaped, L-shaped, frame-like, trough-shaped, O-shaped, elliptical or I-shaped.

It is advantageous that the magnetic flux guide element has a base element. The base element extends in particular parallel to the longitudinal direction, in particular the longitudinal axis, of the rod core choke, in particular to the rod core of the rod core choke. There is an advantageous leadership of the magnetic flux. The base element is arranged such that it does not touch the rod core choke or the electrical conductor which is wound around the rod core choke, in particular in the region of the winding.

It is advantageous that the magnetic flux guide element has at least one leg. The at least one leg extends at least starting from the base element to an end face of the rod core. An optimal

Absorption and / or release of the magnetic flux through the

Magnetic flux guide element is given. In particular, the longitudinal axes of the at least one leg and of the base element extend perpendicular to one another.

It is advantageous that the magnetic flux guide element has rounded portions in the transition between the base element and the leg. The rounding effect that no edges in the region of the transitions between the base member and legs are formed. This results in an improved guidance of the magnetic flux.

It is advantageous that a part of the magnetic flux guide element is arranged at a distance from the printed circuit board at the rod core choke and / or the printed circuit board. In particular, the base element and / or one and / or two or more legs is arranged at a distance from the printed circuit board. For example, a part of the electrical conductor, in particular the connection region, is formed between the printed circuit board and the magnetic flux guide element. It is advantageous that the magnetic flux guide element does not have to be adapted to the surface structure of the printed circuit board.

It is particularly advantageous that the magnetic flux guide element extends parallel or perpendicular to the surface of the circuit board. It results in a maximum flexibility in the arrangement. The longitudinal axes of the

Base member and at least one leg extend parallel to the surface of the circuit board. It is to be regarded as advantageous that the magnetic flux guide element the

Rod core choke, in particular completely, surrounds. The

Magnetic flux guide element is designed as a frame. The trained as a frame magnetic flux guide element surrounds the rod core choke at least partially, preferably completely. Preferably, this surrounds

Magnetic flux guide the rod core choke only in the direction parallel to

Surface of the circuit board. In particular, the frame-like surrounds

Magnetic flux guide element the rod core choke perpendicular to the surface of the circuit board not or only in the region of the end faces of the rod core. The

Magnetic flux guide element is open in the direction perpendicular to the surface of the circuit board. The magnetic flux guide element has a continuous

Recess on, in which the rod core choke is at least partially arranged.

Advantageously, the magnetic flux guide element perpendicular to the surface of the circuit board on a maximum extent, the expansion of the

Bar core choke in the same direction corresponds. As a result, the magnetic flux can be recorded, guided and released as best as possible.

It is advantageous that between at least one of the end faces of the

Stabkernrossel and the magnetic flux guide element, an air gap is formed. In particular, an air gap is formed between one of the end faces of the rod core and one of the legs. In particular, between the two

End sides of the rod core and the legs each formed a gap. Preferably, a gap between the magnetic flux guide element, in particular one of the legs, and the rod core on each end face of

Bar core trained. The rod core choke, the magnetic flux guide element and the gap form a magnetically closed ring circuit with a gap. All columns of the magnetic ring circuit may have a length of a few tenths of a millimeter to 10 millimeters, in particular, all the columns together have approximately 5 mm. Preferably, each gap has approximately 2.5 mm.

Advantageously, the variation of the air gap at the front allows a

Adaptation of the magnetic field emission. It is particularly advantageous that the magnetic flux guide element has at least one engagement element. The engagement element is preferably formed on one of the legs or the base element. The engagement element is in the direction of the printed circuit board, which has an engagement recess on which

Magnet flux guide element formed. The engagement element is integrally formed on the magnetic flux guide element. The engagement element is designed such that it can be at least partially inserted into the engagement recess of the printed circuit board. The engagement element is preferably designed as a dome, knob, mandrel, cuboid or rectangle. The engagement element allows after insertion into the engagement recess of the circuit board alignment and / or fixation of the magnetic flux guide element through the circuit board and thus with respect to the circuit board.

It is advantageous that the magnetic flux guide element has a latching element, which allows attachment of the magnetic flux guide element by means of a latching element to the correspondingly designed holding element on the circuit board. A simple installation by means of snapping the

Magnetic flux guide element is given. In particular, the latching element is part of the engagement element.

It is considered to be advantageous that the magnetic flux guide element is fixed by means of a heat conducting element, in particular thermal paste on the circuit board and / or the rod core choke. A simple assembly is given.

It is advantageous that the magnetic flux guide element a

Magnetflußführungselementausnehmung. The

Magnetflussführungselementausnehmung is on the printed circuit board away side of the magnetic flux guide element in the

Magnet flux guide element formed. In particular, it makes it possible to improve the cooling.

It is to be regarded as advantageous that the magnetic flux guide element has at least one line recess. The line recess is formed such that the connection region of the electrical conductor is at least partially disposed therein and that the magnetic flux guide element can not be arranged at a distance from the printed circuit board on the printed circuit board. Embodiments are illustrated in the figures and explained in more detail in the following description. Show it:

1 shows a block diagram of an inventive control electronics,

FIG. 2 shows a section of the control electronics,

FIG. 3 shows a side view of the detail of FIG

Control electronics,

FIG. 4 shows an end view of the detail of FIG

Control electronics,

Figure 5 shows a first embodiment with an I-shaped

Magnetic flux guide,

Figure 6 shows a second embodiment with an L-shaped

Magnetic flux guide,

Figure 7 shows a third embodiment with a U-shaped

Magnetic flux guide,

FIGS. 7a, 7b and 7c show a development of the third embodiment with a U-shaped magnetic flux guide element,

8 shows a fourth embodiment with a frame-like

Magnetic flux guide,

Figure 9 shows a fifth embodiment with a circular

Magnetic flux guide,

Figure 10 shows a sixth embodiment with an elliptical

Magnetic flux guide,

FIG. 11 shows a side view with the magnetic flux guide element, FIG. 12 shows a plan view of a magnetic flux guide element arranged perpendicular to the surface of the printed circuit board,

Figure 13 is a side view of a perpendicular to the surface of the circuit board arranged U-shaped magnetic flux guide element and

FIG. 14 shows a frequency spectrum of the magnetic field emission with and without a magnetic flux guide element, and FIGS. 15 to 17 show a seventh embodiment with a trough-type

Magnetic flux guide.

The explanations for the individual elements also refer to the elements which have the same title or the same reference drawing supplemented by a letter. For example, refer the

Embodiments of the magnetic flux guide element 50 also on the

Magnetic flux guide elements 50a to 50h. For the elements with one

Reference numerals supplemented by a letter are

Further developments of the general embodiment, which only with a

Reference number is marked without letters.

The block diagram shown in Figure 1 shows an inventive

Control electronics 1 for controlling and / or regulating a consumer 5. The control electronics 1 is used in particular in a vehicle for driving and / or regulating a motor, preferably a small motor, such as

For example, a pump motor, a fan motor, a

Steering drive motor, a windscreen wiper motor, an engine for adjusting seats, a sunroof engine, a motor for adjusting the

Boot lid used. Control electronics are also understood to mean control, control, electronics or regulation.

The control electronics 1 has a coil, which forms in particular a throttle. The throttle is designed as a rod core choke 10. Preferably, the rod core choke 10 acts as an input filter.

Furthermore, the control electronics 1 has a printed circuit board 20. The printed circuit board 20 is a support for electronic components, such as the rod core choke 10, Circuit breakers, capacitors and / or resistors. The circuit board 20 is used for the mechanical attachment and electrical connection of the electronic components, such as the rod core choke 10. Die

Printed circuit board 20 comprises an electrically insulating material and conductor tracks which run on or in the electrically insulating material. Further, the circuit board 20 solder pads 22 which are formed on the surface of the circuit board. The solder pads 22 serve the electrical and mechanical connection of the electronic components 10 with the printed circuit board 20. The solder pads are part of the conductor tracks. The conductor tracks are used to produce an electrical connection between the rod core choke 10 and other electrical

Components.

In Figure 2, a section of the control electronics 1 is shown in perspective. FIG. 2 shows the rod core choke 10 and a part of the printed circuit board 20. The

Printed circuit board 20 has a recess 24. The recess 24 is formed by way of example throughout the printed circuit board 20. Under the recess 24 may also be a recess, a hole, an opening to be understood, as long as these, in particular completely, by cross-cutting, or

continuously through the circuit board 20 runs. The recess 24 does not necessarily have to be surrounded on all sides by the printed circuit board 20.

In particular, the recess to the edge of the circuit board 20 may also be open. The recess 24 may be formed anywhere within the circuit board 20. The recess 24 can be produced in particular by means of a stamping process or by means of a milling process. Also, the recess may be recessed already in the manufacture of the circuit board 20.

According to one embodiment of the invention, the recess is only a depression. Such a configuration is particularly useful if the circuit board 20 is formed very thick in relation to the rod core choke 10. In particular, if the diameter, preferably the radius of the

Bar core choke 10 is smaller than the thickness of the circuit board 20 is formed.

In Figure 2, the recess 24 is exemplified continuously.

By way of example, the rod core choke 10 is located within the recess 24

arranged. The rod core choke 10 projects out of the recess 24 on both sides of the printed circuit board. The rod core choke 10 protrudes in particular between 30 to 70% of the diameter of the rod core choke 10 on each side of the circuit board 20 from the recess 24 out.

The rod core choke 10 has a rod core 12 and an electrical conductor 14. The rod core 12 comprises a ferrite material and / or a

ferromagnetic material. In particular, the rod core 12 is composed of, in particular laminated, metal sheets having a thickness of, for example, 100 μm, a solid metal core or a powder core. The sheets are in particular punched Trafo sheets or rapidly solidified metal strips. The rod core 12 comprises or consists of a ferrite material, such as MnZn, NiZn, Fe, Co and Ni based soft magnetic alloys. Also, ferromagnetic materials in polymers are possible as a rod core 12.

To the rod core 12 of the electrical conductor 14 is wound, which forms a winding, in particular a coil. The rod core choke 10 forms a coil, or an inductance for limiting currents in electrical lines, for temporary storage of energy in the form of a magnetic field

Impedance matching or for filtering.

The electrical conductor 14 has in particular a circular cross-section. The diameter of the electrical conductor is in particular at least 1.3 mm, preferably at least 2.2 mm or 2.24 mm.

Furthermore, the electrical conductor 14 has at least two connection regions 16a, 16b. The connection areas 16 a, 16 b are used for electrical contacting of the electrical conductor 14 with the solder pads 22 of the printed circuit board 20.

According to FIG. 2, each connection region 16a, 16b has two diametrically opposite connection surfaces. Wherein the connection surface, which faces in the direction of the circuit board 20, is referred to as a connection surface 15a, 15b. The other connection surface faces away from the printed circuit board 20. As a result, the rod core choke 10 can be inserted from both sides into the recess 24 and connected to the printed circuit board 20. By way of example, in FIG. 2, the rod core choke 10 is inserted into the recess from above and

Accordingly, also electrically connected to the top of the circuit board 20 with this. Hereinafter, as pads 15a and 15b as

Connection surfaces referred to, after assembly in contact with the Printed circuit board 20, in particular with the electrical traces of the circuit board 20, are.

According to a development of the invention, each connection region 16a and 16b has only one connection element, which forms the connection surface 15a and 15b.

The electrical conductor 14 has, in the connection regions 16a and 16b, a cross-section which deviates from the rest of the electrical conductor 14. In particular, the cross section of the electrical conductor 14 in the

Terminal portions 16a and 16b at least a straight portion, which leads to a flat pad 15a, 15b. The connection surfaces 15 a, 15 b allow electrical connection of the printed circuit board 20 with the

Rod core choke 10. The electrical connection between the printed circuit board 20 and the electrical conductor 14 is produced in particular by means of soldering.

Preferably, the two connection surfaces 15a, 15b lie in a first imaginary plane 40. The normal vectors of the connection surfaces 15a and 15b point in the same direction, in particular in the direction of the printed circuit board 20. The connection regions 16a, 16b are formed in particular by the ends of the electrical conductors 14 educated. The ends extend parallel to the longitudinal axis of the rod core 12. Preferably, the connection regions 16a, 16b and the longitudinal axis 46 of the rod core 12 lie in one plane.

FIG. 3 shows the side view of the section of the control electronics 1 from FIG. By way of example, it is shown in FIG. 3 that the rod core choke 10 protrudes from the printed circuit board 20 by approximately 30% on the side opposite the connection regions 16a and 16b. The larger portion of the rod core choke 10 protrudes on the side of the printed circuit board 20 from the recess 24, on which also the terminal portions 15a and 15b are located.

Furthermore, FIG. 3 shows that the connection surfaces 15a, 15b lie in the first imaginary plane 40. A second plane 45 extends parallel to the first plane 40. The second plane 45 is spanned by the radially centered longitudinal axis 46 of the rod core 12 and by the radially centered longitudinal axis of the electrical conductor 14 in one of the connection regions 16a, 16b. Preferably, the second plane 45 is defined by the radially centered longitudinal axes in both Terminal portions 16 a, 16 b of the electrical conductor 14 and the radially centered longitudinal axis 46 of the rod core 12 is formed. As a centered longitudinal axis is referred to a cross-section through the center extending longitudinal axis. Preferably, the radially centered longitudinal axis 46 of the rod core 12 corresponds to the axis of symmetry of the rod core 12. The second plane 45 divides the rod core 12 into two, in particular substantially equal, segments, especially when viewed in cross section, into two semicircular segments of equal size. The second plane 45 forms the mirror plane of the rod core 12.

The second level 45 and the first level 40 are spaced apart. The distance substantially corresponds to the radius of the electrical conductor 14 in the connection regions 16. Preferably, the distance additionally comprises the thickness of the solder between the printed circuit board and the electrical conductor 14.

FIG. 4 shows the rod core choke 10 located in the recess 24 from the end face of the rod core choke 10. The rod core 12 has, viewed from the front side, a circular cross section with a center point. The rod core 12 is wrapped by the electrical conductor 14.

The first plane 40 extends parallel over the surface of the circuit board 20, or has a minimum distance, which corresponds in particular to the thickness of the solder. The first level 40 divides the circular rod core 12 and thus the rod core choke 10 into two segments, in particular two

Circular segments. The first circle segment has a circle segment height hl which is smaller than the circle segment height h2 of the second circle segment. Furthermore, the circle segment height hl is smaller than the radius R of the rod core 12. The first circle segment is located to a part within the recess 24. Another part protrudes on the connecting surfaces 15 of the electrical conductor

14 opposite side of the circuit board 20 from the recess 24 out.

Viewed in cross-section, an imaginary straight line passes through the center of the rod core 12 and the center of the electrical conductor 14 in

Terminal area 16a, 16b parallel to the surface of the circuit board 20. The straight line is part of the second level 45. The terminal portions 16a, 16b of the electrical Conductor 14, or the ends of the electrical conductor 14 are parallel to the axial direction of the rod core 14. The connection areas 16a, 16b are shown in FIG. 4 and FIG. 3 next to the rod core 12 of the rod core choke 10.

According to a development, the circle segment height hl is greater than the

Circular segment height h2 and / or the radius R of the rod core 12.

According to one embodiment of the invention, the circle segments hl, h2, starting from the first level 40, are of equal size. Preferably, the circle segments may have outgoing from the first plane 40 ratios 4/7 to 3/7. In particular, other ratios such as 2/3 to 1/3 or 3/4 to 1/4 are possible.

FIGS. 5 to 13 show a detail of the control electronics 1 with a magnetic flux guide element 50 according to the invention

Magnetic flux guide member 50 is formed so as to correspond to those of

Bar core choke 10 generates generated magnetic flux. The

Magnetic flux guide element 50 has a permeability greater than 1, preferably greater than 100. In particular, the magnetic flux guide element 50 is composed of, in particular laminated, metal sheets with thicknesses of, for example, 100 μm, a solid metal core or a powder core. The sheets are in particular punched Trafo sheets or rapidly solidified metal strips. The magnetic flux guide member 50 comprises or is made of a ferrite material such as MnZn, NiZn, Fe, Co and Ni based soft magnetic alloys. Ferromagnetic materials in polymers are also known as

Magnetic flux guide element 50 possible.

The various embodiments of the magnetic flux guide member are referred to as 50a to 50h. Embodiments of the magnetic flux guide member denoted by 50 refer to all embodiments 50a to 50h.

FIG. 5 shows a first embodiment of the control electronics 1 with a magnetic flux guide element 50a. The magnetic flux guide member 50a is I-shaped. The magnetic flux guide member 50a has a base member 52. The base member 52 is disposed adjacent to the rod core choke 12. The base member 52 extends at least the length of the rod core 12 in the longitudinal direction. Preferably, the base member 52 extends beyond the length of the bar core 12. The base member 52 extends parallel to the surface of the circuit board 20.

FIG. 6 shows a second embodiment of the control electronics 1 with a magnetic flux guide element 50b. The magnetic flux guide element 50b is L-shaped. The magnetic flux guide element 50 has a leg 54 in addition to the base element 52 corresponding to the I-shaped magnetic flux guide element 50b according to FIG. The leg 54 extends from the base member 52 in the direction of the rod core choke 10. Das

Magnetic flux guide element 50b extends parallel to the surface of the circuit board 20. The leg 54 extends from the base member 52 to the front side of the rod core 12. The leg 54 may according to an embodiment of the invention also on the front side of the rod core 12, even the rod core choke 10 addition extend. Preferably, the leg 54 and the base member 52 are arranged at right angles to each other. Further, the base member 52 and the legs 54 are fixedly connected to each other, in particular formed in one piece.

FIG. 7 shows a third embodiment of the control electronics 1 with a magnetic flux guide element 50c. The magnetic flux guide element 50c is U-shaped. The magnetic flux guide element 50c has, in addition to the base element 52 and the first leg 54, a second leg 56 corresponding to the L-shaped magnetic flux guide element 50c according to FIG. The second leg 56 is formed parallel to the first leg 54. The leg 56 extends from the base member 52 to the

End face opposite the end face up to which the first leg 54 extends. The base member 52 has a minimum length corresponding to the length of the rod core 12 plus the thickness of the first leg 54 and the second leg 56 plus the air gaps between the rod core 12 and legs 54, 56. Preferably, the leg 54, the leg 56 and the base member 52 are arranged at right angles to each other. Furthermore, that is

Base member 52, the first leg 54 and the second leg 56 firmly connected to each other, in particular integrally formed.

In Figure 7, columns 95, 96 are shown. The gaps 95, 96 are each formed between the end face of the rod core choke 10 and the legs 54, 56. The columns 95, 96 have, for example, different gap widths d. The Columns can also be made the same size. The gap width d of the gap 95 and 96 can be designed to be the same size in particular according to a development. In the other embodiments, the gap width, in particular d, between the end faces of the rod core 12 and the

Magnet flux guide means 50 may be the same size or different sizes. Preferably, according to the two gap widths d added together a fixed value.

FIG. 7 a shows a development of the U-shaped magnetic flux guide element 50 c. Figure 7a shows a perspective view of the

Magnetic flux guide element 50h, the circuit board 20 and the rod core choke 10. The magnetic flux guide element 50h is U-shaped, has

rounded transitions 55 between the base member 52 and the legs 54, 56.

A rounding 55 can also be applied to the other embodiments 50a to 50g. The rounding causes in particular an improved flow control. The legs 54, 56 extend from the base member 52 to the rod core 12, in particular to the end faces of the rod core 12. Preferably, the legs 52, 54 extend beyond the rod core 12 also. By way of example, the legs 54, 56 in FIG. 7 extend minimally beyond the rod core. Preferably, the legs extend at least over the entire end face of the rod core 12. The magnetic flux can thus be absorbed by the magnetic flux guide element 50h.

In Figure 7a, the columns 95, 96 are shown. The gaps 95, 96 are each formed between the end face of the rod core choke 10 and the legs 54, 56. The columns 95, 96 preferably each have a width d of 2.5 mm. Preferably, the width d of the two columns is identical. The gap width corresponds to the length between an end face of the rod core 12 and the nearest part of the magnetic flux guide element 50. The gap is designed in particular as an air gap. Preferably, two columns 95, 96, in particular air gaps, are formed.

According to a development according to FIG. 7, the gaps 95, 96 have, for example, different widths d. However, the columns in an embodiment according to FIG. 7 can also be of the same size. The gap width d the gap 95 and 96 may be formed in particular according to a development of equal size.

FIG. 7b shows the magnetic flux guide element 50h without a printed circuit board 20. The magnetic flux guide element 50h is U-shaped and has two legs 54, 56 and a base element 52. The base member 52 and the two legs 54, 56 are formed perpendicular to each other. The transitions 55 between the base member 52 and the legs 54, 56 are rounded. The base member 52 has the surface 82. The first leg 54 has the surface 83. The second leg 56 has the surface 81. After assembly of the magnetic flux guide element 50h, this is applied to the surfaces 81, 82, 83 on the printed circuit board 20.

The magnetic flux guide element 50h has a Leitungsausnehmungen 59. The line recess 59 is formed as a recess in the region between the first leg 54 and the base member 52. Preferably, the line recess 59 is formed by a recess, which is formed for the most part in the base member 52. After assembly is in

Leitungsausnehmung 59 of the electrical conductor 14, or one of its

Connection areas 16a, 16b arranged.

The surface 81 of the second leg 56 is divided by an engagement element 92. The engagement element 92 has, for example, a square basic shape in FIGS. 7a to 7c. It extends in the direction of the printed circuit board 20. After the magnetic flux guide element 50 has been mounted on the printed circuit board 20, it engages in an engagement recess 23 of the printed circuit board 20. A

corresponding arrangement can be taken from Figure 7c.

Figure 7c shows a perspective view from below of the

Magnetic flux guide element 50 h, which is arranged on the circuit board 20.

The surface 83 of the first leg 54 is subdivided by an engagement element 90. The engagement element 90 has, for example, as shown in Figure 7a to 7c, a rectangular basic shape. It extends in the direction of the printed circuit board 20. After mounting the magnetic flux guide element 50 on the

Printed circuit board 20 engages it in an engagement recess 25 of the circuit board 20. A corresponding arrangement can be taken from FIG. 7c. The engaging members 90, 92 are formed to fit in the

Engagement recesses 23, 25 can be introduced. The engagement elements 23, 25 in conjunction with the engagement recesses 23, 25 allow positioning and / or fixation of the rod core choke 10.

The magnetic flux guide element 50h preferably has a chamfer 95. The chamfer 95 causes sufficient spacing to one of the terminal portions 16a, 16b. The spacing 95 is preferably on the end remote from the base element 12 of the second leg 56, and

Leg, which has no line recess 59, formed.

Two elements are spaced apart in a region when there is no direct contact between the elements in that region.

FIG. 8 shows a fourth embodiment of the control electronics 1 with a magnetic flux guide element 50d. The magnetic flux guide member 50d is formed like a frame. The magnetic flux guide element 50d completely encloses the rod core choke 10. The magnetic flux guide member 50d is formed as a frame completely surrounding the rod core choke 10. It extends parallel to the surface of the printed circuit board 20. Das

Magnetic flux guide element 50d has a first base element 52 and a second base element 58. The two base elements 52 and 58 parallel to each other and are diametrically opposite to the

Rod core choke 10 is arranged. Furthermore, the magnetic flux guide element 50d has a first leg 54 and a second leg 56. The two legs 54 and 56 are parallel to each other and are diametrical

arranged opposite to the rod core choke 10. The two legs 54 and 56 connect the base members 52 and 58 together.

In particular, the frame-like magnetic flux guide element 50 is rectangular, preferably square.

FIG. 9 shows a fifth embodiment of the control electronics 1 with a magnetic flux guide element 50e. The magnetic flux guide member 50e is O-shaped. Wherein the magnetic flux guide member 50e has a circular cross section. FIG. 10 shows a sixth embodiment of the control electronics 1 with a magnetic flux guide element 50f. The magnetic flux guide element 50f is elliptical. Wherein the magnetic flux guide member 50f has an elliptical cross section. The magnetic flux guide element 50f is formed completely circumferentially.

Figure 11 shows a development of the control electronics in particular, Figure 11 shows a development of the embodiments 1 to 6. In the shown

Further development is the magnetic flux guide element 50 according to one of

Embodiments 1 to 6, spaced from the circuit board 20 arranged.

Between the magnetic flux guide element 50 and the circuit board, a gap is formed. The magnetic flux guide member 50 is completely disposed on one side of the circuit board 20. It is arranged on the side of the printed circuit board 20, on which the larger segment of the rod core choke 10 protrudes from the printed circuit board 20.

According to a development of the embodiments, the

Magnet flux guide element 50 may also be arranged on both sides.

In particular, they can extend in recess 24. Also, a connecting element may be formed which is arranged within the recess and connects parts of the magnetic flux guide element 50 with each other.

The magnetic flux guide element 50 has a distance a from the printed circuit board 20. The distance a substantially corresponds to the diameter of the

electrical conductor 14 in the connection area 16. Das

Magnetic flux guide element 50 is located on the electrical conductor 14 in

Connection area 16 on. According to a development, the distance a is negligible and the magnetic flux element 50 extends from the

Surface of the circuit board 20 in the direction perpendicular to the surface of

Printed circuit board 20. The magnetic flux guide element 50 is only about

Spacer (not shown) connected to the circuit board 20.

In particular, the magnetic flux guide member 50 extends in the direction of the normal vector of the surface of the circuit board 20 only until the rod core choke is completely covered. The height of the Magnetic flux guide element 50 corresponds for example h2 or hl minus the thickness of the printed circuit board 20th

The thickness of the magnetic flux guide element 50 is dependent on the magnetic flux to be guided and thus dependent on the rod core choke 10 and its field of application. Advantageously, a cross section is smaller than / equal to that of the rod core 12 of the rod core choke 10th

Between the end faces of the rod core choke 10 and the

Magnetic flux guide element 50 are formed air gaps. Preferably, additional air gaps between the electrical conductors 14 and the

Magnet flux guide element 50 is formed. The length of the base member 52 corresponds to the length of the magnetic flux guide member 50 plus the thickness of the air gaps between the magnetic flux guide member 50 and the end face of the rod core choke 50.

According to one embodiment of the invention, the embodiments may be arranged not only parallel to the surface of the circuit board 20, but also perpendicular or obliquely to the surface of the circuit board 20.

Figure 12 shows a development of the control electronics 1. In particular, Figure 12 shows a development of the embodiments 1 to 6. Das

Magnetic flux guide element 50 is arranged for example perpendicular to the surface of the printed circuit board 20.

It is here to see the base member 52. In this case, the magnetic flux guide element 50 can be designed in accordance with one of the embodiments I, L, U, O, rectangular, frame-like or elliptical.

FIG. 13 shows the side view of an exemplary U-shaped magnetic flux guide element 50 arranged perpendicular to the surface

Magnetic flux guiding element is as described for Figure 11. According to a further development, the width corresponds to the diameter of the rod core 12.

Magnetic flux guide elements 50a to 50f can be arranged accordingly.

FIG. 14 shows the magnetic field emission in relation to the frequency range. By way of example, straight line 60 shows one prescribed in China legal limit of 9 kHz to 30 MHz. The history 62 shows the

Magnetic field emission without the use of the magnetic flux guide element 50. The curves 64 and 66 show the magnetic field emissions of

Control electronics 1 with a magnetic flux guide element 50. The

Magnetic flux guide elements are in this case designed as a frame according to FIG. The different curves 64 and 66 result depending on the size of the air gap at the end faces of the rod core choke 10. The air gap leading to the curve 64 is greater than the air gap leading to the curve 66. However, it is when using the

Magnetic flux guide element 50 can be seen that the magnetic field emission decreases by about 7 dB. The magnetic field emission is thus below the required limit value 60.

FIG. 15 shows a seventh embodiment of the control electronics 1 with a magnetic flux guide element 50g. The magnetic flux guide member 50g is formed like a trough. The magnetic flux guide element 50 g is arranged on one side of the printed circuit board 20 on the printed circuit board 20 and / or the rod core choke 10. The magnetic flux guide member 50g encloses the

Bar core choke 10 in the direction parallel to the surface of the printed circuit board 20. In addition, it surrounds the rod core choke 10 partially in the direction perpendicular to

Surface of the circuit board 20. It has a

Magnetflussführungselementausnehmung 510 on. The

Magnetic flux guide element recess 510 allows the derivation of

Heat energy generated by the rod core choke 10. The

Magnetic flux guide element recess 510 is in the part of

Magnet flux guide element 50 is formed, the circuit board 20 is directed away.

FIG. 16 shows a sectional view through the magnetic flux guide element 50g, the rod core choke 10 and the printed circuit board 20. The

Magnetic flux guide element 50g is formed on its inner side, in particular in the radial direction of the rod core 12, corresponding to the outer circumference of the rod core choke 10. Between the outer circumference of

Rod core choke 10 and the inside of the magnetic flux guide element 50g, an air gap 520 is formed. The Magnetflussführungselementausnehmung 510 extends parallel to the rod core 12. It has a length which corresponds to the length of the rod core 12 plus the air gaps at the end faces of the rod core 12 on. The width is smaller than the diameter of the rod core 12. It is formed in particular at right angles. The

Magnetflussführungselementausnehmung 510 is formed throughout as a recess, recess or hole.

In FIG. 17, the magnetic flux guide element 50g without a printed circuit board 20 and rod core choke 10 is shown. The magnetic flux guide element 50g is composed of two base elements 52, 58 and two legs 54, 56 and a cover. It is preferably formed in one piece. The

Magnetic flux guide element 50g largely encloses the rod core choke 10 on one side of the printed circuit board 20.

The magnetic flux guide member 50g has lead recesses 59 through which the electrical conductor 14 can be passed through the magnetic flux guide member 50g. The line recesses 59 are open to the edge of the magnetic flux guide element 50g. They are especially in the direction of

Printed circuit board 20 open. They are particularly continuous.

According to a development, the magnetic flux guide elements 50, according to one of the aforementioned embodiments, one or more, in particular two, line recesses 59 have. The training of

Lead recesses 59 are not limited only to the seventh embodiment. The other embodiments may be a

Have line recess 59. The Leitungsausnehmungen 59 is particularly in the field of

Terminal portions 16 a, 16 b of the electrical conductor 14 is formed. It is advantageous that the distance a, according to FIG. 11, between the printed circuit board 20 and the magnetic flux guide element 50 can be reduced by the line recesses 59. Preferably, the magnetic flux guide element 50 has the same number of line recesses 59 as the rod core choke 10 connecting areas

16a, 16b has. In particular, the magnetic flux guide element 50h has only one line recess 59.

The line recesses 59 are formed in the base member 52 and / or the base member 58 and / or the leg 54 and / or the leg 56. Leitungsausnehmungen 59 are recesses, recesses, holes at least the size of the electrical conductor 14 in Connection area 16a, 16b correspond. The shape can be rectangular, square, round or oval.

According to a development, the magnetic flux guide elements 50 can have raster elements. The locking elements are provided around a

To allow attachment of the magnetic flux guide element 50 to the circuit board 20. The locking elements engage in correspondingly formed holding elements which are formed in the printed circuit board or arranged on the printed circuit board, a. According to one embodiment of the invention, the IVlagnetflussführungselennent 50 can also be soldered to the circuit board 20, clipped, glued, screwed, riveted, etc.

According to a development, the magnetic flux guide elements 50 may have one or more, in particular two, engagement elements 90, 92, 530. The engagement element 90, 92, 530 is in particular as a dome, knob, mandrel, cuboid,

Rectangle, cylindrical, cone-shaped, or may have such a basic shape. The engagement element 90, 92, 530 engages in one

corresponding engagement receptacle 23, 25 in the circuit board 20 a. The engagement element 90, 92, 530 is in particular rectangular or square. The engagement receptacle 23, 25 in the circuit board 20 is correspondingly as a rectangular, in particular continuous, recess or hole

educated.

According to Figure 17, the engagement member 530 is formed in cross section corresponding to a circular cutout. The engaging member 530 is on the

Printed circuit board 20 facing side of the magnetic flux guide element 50g. Preferably, the engagement element 530 is on one of the legs 54, 56, in particular is on both legs 54, 56 at least one

Engagement element 530 formed. The formation of the engagement element 530 is possible in all embodiments.

According to FIGS. 7a to 7c, the magnetic flux guide element 50h has two engagement elements 90, 92. The engagement elements 90, 92 are formed as a cuboid. Advantageously, they have rounded edges. It is facilitated assembly possible. The engagement elements 90, 92, 530 are preferably integral with the

Magnet flux guide element 50 connected.

According to one embodiment of the invention, the magnetic flux guide element 50 by means of a heat conducting element, in particular thermal compound (TIM) is attached to the circuit board and / or the rod core choke. Preferably, the magnetic flux guide element 50 via an engagement member 90, 92, 530 and a heat-conducting element with the circuit board 20 is firmly connected.

According to a further development, after the insertion of the engagement element 90, 92, 530 into the corresponding engagement receptacle, an adhesive or gap filer is used to connect the magnetic flux guide element 50 to the printed circuit board 20. The adhesive or Gapfilier is primarily used in the area of the engagement receiving and the engagement member 90, 92, 530.

According to a development of the embodiments, the

Magnetic flux guide elements 50 indentations, recesses,

Rounding off, bends on. The indentations, recesses,

Rounding and / or angling allow for simplified assembly.

Claims

claims

1. Control electronics (1) for controlling a consumer (5) in one

Vehicle, in particular an electric motor, comprising a printed circuit board (20) and a rod core choke (10), the rod core choke (10) having a rod core (12) and an electrical conductor (14) wound around the rod core (12) forms,

characterized in that the control electronics (1) is adapted to receive a magnetic flux guide element (50) which guides the magnetic flux generated by the rod core choke (10).

2. Control electronics (1) according to the preceding claim, characterized

characterized in that the circuit board (20) has a recess (24) within which the rod core choke (10) is at least partially arranged.

3. Control electronics according to one of the preceding claims, characterized in that the magnetic flux guide element (50) is arranged completely on one side of the printed circuit board (20).

4. Control electronics according to one of the preceding claims, characterized in that the magnetic flux guide element (50), in particular at least partially, spaced from the printed circuit board (20) is arranged, in particular a part of the electrical conductor (14) between the

Printed circuit board (20) and the magnetic flux guide element (50) is formed.

5. Control electronics according to one of the preceding claims, characterized in that the magnetic flux guide element (50) is U-shaped, L-shaped, frame-like, trough-like, O-shaped, elliptical or I-shaped.

6. Control electronics (1) according to the preceding claim, characterized

characterized in that the magnetic flux guide element (50) a

Base element (52) which extends parallel to the longitudinal direction of the rod core choke (12). Control electronics (1) according to the preceding claim, characterized in that the magnetic flux guide element (50) has at least one limb (54, 56) which extends at least as far as an end face of the rod core (12) starting from the base element (52).

Control electronics according to one of the preceding claims, characterized in that the magnetic flux guide element (50) extends parallel or perpendicular to the surface of the printed circuit board (20).

Control electronics according to one of the preceding claims, characterized in that the magnetic flux guide element (50) the

Bar core choke (10) at least partially, preferably completely, surrounds.

Control electronics according to one of the preceding claims, characterized in that the magnetic flux guide element (50) perpendicular to at least one of the surfaces of the printed circuit board (20) has a maximum extent, at least the extent of the rod core (12), preferably the rod core choke (10), in the same direction.

Control electronics (1) according to one of claims 8 to 10, characterized in that between at least one of the end faces of the rod core choke (10) and the magnetic flux guide element (50) an air gap is formed, preferably that between the rod core choke (10) and the magnetic flux guide element (50 ) An air gap is formed. 12. control electronics (1) according to one of claims 8 to 11, characterized

characterized in that the magnetic flux guide element (50) a

Has latching element, which is an attachment of the

Magnet flux guide element (50) by means of a locking element to the corresponding formed holding element on the circuit board (20).

13. Control electronics (1) according to one of the preceding claims, characterized in that the magnetic flux guide element (50) by means of a heat conducting element, in particular thermal paste on the circuit board (20) and / or the rod core choke (10) is attached.

14. Control electronics (1) according to one of the preceding claims, characterized in that the magnetic flux guide element (50) has a

Magnetic flux guide element recess (510).

15. Control electronics (1) according to one of the preceding claims, characterized in that the magnetic flux guide element (50) has at least one line recess (59) in which at least one

Connection region (16) of the electrical conductor (14) is arranged at least in part.