CN212380676U - Low-voltage connector and electrical equipment - Google Patents

Abstract

The utility model provides a low-voltage connector and electrical equipment, the low-voltage connector comprises a filtering main body made of magnetic materials and an assembly part made of insulating materials, and the filtering main body is installed and fixed on the opening part of the shell of the main equipment through the assembly part and is insulated from the shell of the main equipment; the filtering main body comprises a plurality of first through holes which penetrate through the filtering main body respectively, and the filtering main body filters low-voltage connecting conductors which penetrate through the first through holes respectively. The embodiment of the utility model provides a set up a plurality of first through-holes through assembling in the magnetic core main part of equipment casing, can filter a plurality of low pressure connecting conductor that pass the magnetism main part simultaneously, replace the filter circuit on the printed circuit board to filter, not only can save printed circuit board's space and device cost, still can improve the problem that space coupling disturbed direct coupling to low pressure connecting conductor and to the external transmission simultaneously.

Description

Low-voltage connector and electrical equipment

Technical Field

The embodiment of the utility model provides an anti-interference field is related to, more specifically says, relates to a low pressure connector and electrical equipment.

Background

In new energy automobiles, the EMC (Electromagnetic Compatibility) requirements of the whole automobiles and parts are higher and higher, and the power density requirements of the equipment are higher and higher, so that the structural design is more and more difficult. Currently, EMC disturbances of electrical equipment are generally emitted to the outside through high-voltage connectors and low-voltage connectors.

The low-voltage connector is mainly used for electrical connection of low-voltage signals and power supplies, and as shown in fig. 1, a low-voltage connection conductor (i.e., PIN) 131 led out from the low-voltage connector 13 is generally directly connected to a printed circuit board 22 in a housing 21 of an electrical device, and if an interference source 23 is present on the printed circuit board 22, interference occurs on the low-voltage connection conductor 131 of the low-voltage connector 13 through both conduction and coupling. The filter circuit for the low-voltage signals is located on the printed circuit board, and although close to the low-voltage connector 13, conduction of interfering currents to the external low-voltage connection conductor 13 can only be avoided to a certain extent, whereas for the spatial coupling path, due to bypassing the effective filter circuit, it cannot be eliminated at present.

In addition, the high-voltage terminal of the current new energy automobile has a certain shielding function, and the electrical connection between the high-voltage terminal and the inside of the system is generally realized through an OT terminal. For easy to assemble and cable preparation, the length of above-mentioned high voltage terminal in spare part casing inside needs to be greater than 40mm, and three-phase and high voltage bus terminal are all so.

To suppress EMC interference of the high-voltage terminal, as shown in fig. 2, a magnetic ring 24 may be added to an inner wall of a housing 21 of the electrical apparatus (the magnetic ring 24 is closely attached to the inner wall of the housing 21), and the high-voltage cable 11 (including the OT terminal 12 at the end of the high-voltage connection cable) passes through a terminal hole 211 of the housing 21 and an internal window of the magnetic ring 24 and enters the housing 21.

The magnetic ring 24 may be formed of an amorphous/ferrite material, wherein the amorphous material is suitable for circular and racetrack shapes because of its extreme thinness and brittleness of the strip, and can only be assembled after molding. As shown in fig. 3, the distance d1 between the boundary of the window inside the magnetic ring 24 and the high-voltage cable 11 needs to be kept at 2-3 mm or more, so that the area of the window inside the magnetic ring 24 is generally large, the high-voltage cable 11 passes through the magnetic ring 24 directly, and the number of turns is 1, so that the effective inductance is affected by the area of the window inside the magnetic ring 24, and the magnetic ring 24 in the same volume cannot play its maximum role. More seriously, because the area of the inner window of the magnetic ring 24 is too large, considering the power density of the whole machine, the external space of the magnetic ring 24 is necessarily limited, and under the same external space, the effective sectional area of the magnetic ring 24 is reduced, and the anti-interference effect of the magnetic ring 24 is also influenced.

For ferrite material, the initial permeability is much lower than that of amorphous material, and it faces the same problem as amorphous material, so the magnetic ring made of ferrite has relatively worse effect.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a to the unable relatively poor problem of magnetic ring anti-interference effect in eliminating external interference, the anti-interference scheme of high-voltage terminal in the above-mentioned electrical equipment low voltage terminal, provide a low pressure connector and electrical equipment.

An embodiment of the present invention provides a low voltage connector, including a filtering main body made of a magnetic material and an assembling portion made of an insulating material, wherein the filtering main body is installed and fixed on a hole portion of a housing of a main device through the assembling portion and is insulated from the housing of the main device; the filtering main body comprises a plurality of first through holes which penetrate through the filtering main body respectively, and the filtering main body filters low-voltage connecting conductors which penetrate through the first through holes respectively.

Preferably, the center lines of the plurality of first through holes on the filter body are arranged in parallel.

Preferably, the center lines of the first through holes on the filter body are straight lines respectively.

Preferably, the assembly part is step-shaped and wraps or partially wraps the filtering main body; the assembling portion comprises a second through hole for the low-voltage connecting conductor to pass through, and the center lines of the first through hole and the second through hole are located on the same straight line.

An embodiment of the utility model provides an electrical equipment is still provided, including the casing, install in casing outside or outlying high-pressure connector and as above low pressure connector, just electrical equipment passes through high pressure connector inserts the casing with the high-pressure cable, outside control signal cable via the low pressure connector inserts the casing.

Preferably, the low voltage connector is coupled to the housing from a first direction of the housing, and the high voltage connector is coupled to the housing from a second direction of the housing, the first direction being perpendicular to the second direction.

Preferably, the high-voltage connector comprises an insulating shell and a magnetic ring, and the insulating shell and the magnetic ring are integrated into a whole; the insulating shell is provided with at least one wiring hole, and the at least one wiring hole penetrates through an inner window of the magnetic ring; the diameter of each wiring hole is matched with that of the high-voltage cable, and the central shaft of each wiring hole is parallel to the central shaft of the magnetic ring.

Preferably, the insulating casing is provided with a plurality of wire holes, and the plurality of wire holes are arranged in a straight line in the inner window of the magnetic ring.

Preferably, the insulating housing includes a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion are distributed in a step shape along a direction of a central axis of the magnetic ring, and a size of an outer periphery of the first connecting portion is smaller than a size of an outer periphery of the second connecting portion; the magnetic ring is located at the second connecting portion, and the wire holes respectively penetrate through the first connecting portion and the second connecting portion.

Preferably, the insulating housing has a fixing portion and a plug portion thereon, and the high-voltage connector is mounted to the housing through the fixing portion, the plug portion includes a female terminal or a male terminal for electrically conducting connection with the high-voltage cable;

the high-voltage connector comprises wiring terminals which are respectively fixed to the tail ends of the high-voltage cables in a crimping mode.

The utility model discloses low pressure connector and electrical equipment have following beneficial effect: through setting up a plurality of first through-holes at the magnetic core main part of assembling in electrical equipment's casing, can carry out the filtering to a plurality of low pressure connecting conductor that pass the magnetism main part simultaneously, replace the filter circuit on the printed circuit board to carry out the filtering, not only can save printed circuit board's space and device cost, still can improve the problem that space coupling disturbed direct coupling to low pressure connecting conductor and to the external transmission simultaneously.

The embodiment of the utility model provides a still through the insulating casing integration with magnetic ring and high voltage connector integrative, not only can reduce the size of the inside window of high voltage connector magnetic ring, reduce the volume of filtering magnetic ring, improve anti-interference effect, still can save electrical equipment's casing inner space, simplify the assembly of high voltage terminal.

Drawings

FIG. 1 is a schematic view of a prior art low voltage connector assembled to the housing of an appliance;

fig. 2 is a schematic view of a housing of a prior art high voltage cable access apparatus;

FIG. 3 is a schematic cross-sectional view of the apparatus of FIG. 2 taken along line A-A;

fig. 4 is a schematic structural diagram of a low-voltage connector according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a filtering main body in a low-voltage connector according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of an electrical device provided in an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a high-voltage connector in an electrical device according to an embodiment of the present invention;

fig. 8 is a schematic cross-sectional view of the high voltage connector of fig. 7 taken along line B-B.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 3, the embodiment of the present invention provides a schematic structural diagram of a low voltage connector, which can be applied to an electrical device having a low voltage power supply and/or a control signal input/output. The low voltage connector of the present embodiment includes a filter body 41 and a fitting part 42, wherein the filter body 41 is made of a magnetic material (e.g., a nickel zinc ferrite material), and the fitting part 42 is made of an insulating material. The filter body 41 is attached and fixed to the inside of an opening of a housing of a main device (i.e., an electrical device using a low-voltage connector) (the housing of the main device is usually made of a metal material) by a mounting portion 42, and is insulated from the housing of the main device.

As shown in fig. 4, the filter body 41 in this embodiment includes a plurality of first through holes 411, the plurality of first through holes 411 respectively penetrate through the filter body, and the shape and size of the cross section of each first through hole 411 are adapted to the shape and size of the cross section of the low voltage connecting conductor 40 (e.g., a pin) for transmitting the low voltage power and/or the control signal, for example, the size of the cross section of the first through hole 411 is slightly larger than the size of the low voltage connecting conductor 40, so that the low voltage connecting conductor 40 can pass through one first through hole 411.

The low voltage connection conductor 40 passes through the filter body 41, which is equivalent to a filter bead connected in series to the low voltage circuit, and the low voltage connection conductor 40 passing through the first through hole 411 can be filtered (including differential mode filtering and common mode filtering) by the filter body 41.

Above-mentioned low pressure connector realizes the filtering of a plurality of low pressure connecting conductor 40 simultaneously through a filtering main part 41, can replace the filter circuit on the printed circuit board to carry out the filtering, also need not to set up the filtering magnetic bead for each low pressure connecting conductor 40, not only can save printed circuit board's space and device cost, simultaneously because filtering main part 41 passes through the inboard of the casing of assembly portion 42 installation at the main equipment, still can improve the problem that space coupling disturbed direct coupling to low pressure connecting conductor and to the external transmission.

In an embodiment of the present invention, the center lines of the plurality of first through holes 411 of the filter body 41 are arranged in parallel, so that the low voltage connecting conductors 40 pass through the filter body 41 in parallel, thereby facilitating assembly. Furthermore, the center lines of the first through holes 411 of the filter body 41 may be straight lines, respectively, to further facilitate the assembling operation of the low-voltage connecting conductor 40.

In another embodiment of the present invention, the assembling portion 42 is in a step shape in an axial direction (i.e. an axial direction of the low voltage connecting conductor 40), and wraps or partially wraps the filtering main body 40, for example, the assembling portion 40 wraps an end of the filtering main body 41 close to an outer side of the equipment housing, and a main portion of the assembling portion 42 is assembled at the outer side of the equipment housing. The fitting part 42 includes a second through hole through which the low voltage connection conductor 40 passes, and the center lines of the first through hole 411 and the second through hole are positioned on the same line, that is, the low voltage connection conductor can pass through the fitting part 42 and the filter body 40 at a time, which facilitates the fitting operation.

As shown in fig. 6, the structural schematic diagram of the electrical device provided by the embodiment of the present invention, the electrical device may be an electrical energy conversion device (e.g. an electric vehicle) such as a transformer, a frequency converter, etc., and the electrical device is connected to an external high voltage power source through a high voltage cable and connected to a low voltage power source and/or a control signal through a low voltage connection conductor. The electrical device of the present embodiment includes a housing 51, a high voltage connector installed outside or at the periphery of the housing 51, and a low voltage connector as described above, the low voltage connector is also installed on the housing 51, the electrical device connects a high voltage cable 60 into the housing 51 through the high voltage connector and supplies power to an internal power utilization module, and an external control signal cable is connected into the housing through the low voltage connector and is electrically connected with the internal low voltage power utilization module or a control unit (for example, directly connected to a printed circuit board).

In an embodiment of the present invention, the low voltage connector is inserted into the housing 51 from a first direction of the housing 51, the high voltage connector is inserted into the housing 52 from a second direction of the housing 51, and the first direction is perpendicular to the second direction. By the mode, the interference of the high-voltage connector to the signal of the low-voltage connector can be avoided.

As shown in fig. 7-8, in another embodiment of the present invention, the high voltage connector includes an insulating housing 31 and a magnetic ring 32, the insulating housing 31 can be made of plastic material, and the insulating housing 31 and the magnetic ring 32 are integrally molded; of course, in practical applications, the insulating housing 31 may also be made of other materials, and the magnetic ring 32 may be encapsulated in the insulating housing 31 by a potting compound. In this way, the magnetic ring 32 can be insulated and fixed. The magnetic ring 32 may be made of amorphous material, ferrite material, or other magnetic material meeting the filtering requirement.

The insulating housing 31 has two wire holes, and the two wire holes both pass through the inner window 321 of the magnetic ring 32. The diameter of each wiring hole is matched with the diameter of the high-voltage cable 60, and the central axis of each wiring hole is parallel to the central axis of the magnetic ring 32, so that the high-voltage cable 60 can pass through the wiring holes, and the central axis of the high-voltage cable 60 is parallel to the central axis of the magnetic ring 32.

In practical applications, the number of the wire holes on the insulating housing 31 may vary according to the application scenario of the high voltage connector, for example, when the high voltage connector is used for connecting a three-phase ac cable, the insulating housing 31 may have one wire hole; when the high voltage connector is used for connecting positive and negative dc buses, the insulating housing 31 may have two wiring holes; when the high voltage connector is used to connect a separate high voltage cable, the insulating housing 31 may have a wiring hole. So that the magnetic loop 32 can simultaneously filter out interference signals for the plurality of high voltage cables 60 passing through each wire passing hole.

As shown in fig. 5, when the high voltage cable 60 is connected using the above-described high voltage connector, the high voltage connector can be assembled with the high voltage cable 60 in advance: the high-voltage cable 60 is inserted through the wire hole of the insulating housing 31, the high-voltage cable 60 is fixed to the insulating housing 31 (for example, by injecting potting adhesive or the like into the wire hole), and then the high-voltage connector is fitted to the outside of the housing 51 (the high-voltage cable 60 is inserted into the housing 51 through the opening 511 of the housing 51).

Because the high-voltage connector and the high-voltage cable 60 are assembled together in advance, and the high-voltage connector is internally provided with the magnetic ring 32 which is integrally molded with the insulating shell 31, the size of an internal window of the magnetic ring 32 can be reduced, the volume of the magnetic ring 32 for filtering is reduced, and the anti-interference effect is improved, and because the high-voltage connector with the magnetic ring 32 is positioned outside the shell, the magnetic ring does not need to be assembled in the shell, the internal space of the shell can be saved, and the assembly of a high-voltage terminal is simplified. Meanwhile, as the magnetic ring 32 moves to the tested cable or the cable subjected to interference emission, the distance between the magnetic ring and the low-voltage connector is enlarged, and the interference suppression effect is better.

In particular, when the insulating housing 31 of the high voltage connector includes a plurality of wire holes, the plurality of wire holes are separated by the same material of the insulating housing 31, so that the plurality of high voltage cables can be easily spaced when being assembled to the high voltage connector, thereby improving safety.

In an embodiment of the present invention, when the insulating housing 31 has a plurality of wire holes, the plurality of wire holes are arranged in a straight line in the internal window 321 of the magnetic ring 32, that is, the central axes of the plurality of wire holes are located on the same straight line. Correspondingly, the magnetic ring 32 can be in an elliptical ring shape, which is beneficial to processing and manufacturing.

Since the high voltage cable 60 can be assembled to the high voltage connector in advance, that is, the high voltage cable 60 does not need to be assembled to the high voltage connector at the installation site, after the high voltage cable 60 passes through the wiring hole of the high voltage connector, a wiring structure (such as an OT terminal) such as a terminal can be crimped on the end portion of the high voltage cable, so that the magnetic ring 32 can be moved to the outside of the housing, and the problem of sacrificing the effective volume of the magnetic ring due to the convenience in installation of the cable, the OT terminal and the like inside the housing is avoided. In this embodiment, the distance d2 between the inner wall of the inner window of the magnetic ring 32 and the circumferential surface of the adjacent wire-passing hole may be less than 2mm, so as to avoid the problem that the filtering effect of the magnetic ring is not good or a magnetic ring with a larger volume is required.

In order to ensure the structural strength of the high-voltage connector and reduce the volume of the high-voltage connector, the insulating housing 31 includes a first connecting portion 311 and a second connecting portion 312, the first connecting portion 311 and the second connecting portion 312 are distributed in a step shape along the direction of the central axis of the magnetic ring 32, and the size of the outer periphery of the first connecting portion 311 is smaller than that of the outer periphery of the second connecting portion 312; the magnetic ring 32 is located at the second connection portion 312, and the wire holes respectively pass through the first connection portion 311 and the second connection portion 312. When the high-voltage connector is assembled to the housing 51, an end surface of the second connecting portion 312 away from the first connecting portion 311 is attached to the housing 51.

The first connecting portion 311 and the second connecting portion 312 can increase the axial size of the insulating housing for connecting the plurality of high voltage cables 60, improve the structural strength of the high voltage connector, and reduce the radial size of the first connecting portion without the magnetic ring 32, thereby reducing the overall size of the high voltage connector.

In another embodiment of the present invention, the insulating housing 31 may further include a fixing portion, and the high voltage connector is mounted to the housing through the fixing portion. Specifically, the fixing portion may be formed of a fixing hole (a central axis of which is parallel to a central axis of the magnetic ring 32) at an edge of the second connecting portion, so that the insulating housing 31 may be fixed to the housing 51 by a screw passing through the fixing hole.

In addition, in order to achieve an electrically conductive connection with the components (e.g., copper bars) inside the housing 51, the high voltage connector may further include connection terminals 33, and the connection terminals 33 are respectively press-fitted to the ends of the high voltage cable 60. For example, the connection terminal 33 may be an OT terminal or the like.

Moreover, in order to ensure the anti-interference effect, the distance between the end face of the magnetic ring 32 and the wiring terminal 33 is less than or equal to 60 mm.

In addition, in another embodiment of the present invention, the high voltage connector may also be a quick-plug type high voltage connector, and accordingly, the insulating housing 31 of the high voltage connector further includes a plug portion, and the plug portion includes a female connector or a male connector. The female or male connector may be located at the end of the wire hole 211, and a high voltage cable is inserted into the wire hole 211 and electrically connected to the female or male connector. The high-voltage connector can be quickly plugged into a corresponding interface of high-voltage electric equipment or a module through the plug head.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A low-voltage connector is characterized by comprising a filter body made of a magnetic material and an assembling part made of an insulating material, wherein the filter body is fixedly arranged at an opening part of a shell of a main device through the assembling part and is insulated from the shell of the main device; the filtering main body comprises a plurality of first through holes which penetrate through the filtering main body respectively, and the filtering main body filters low-voltage connecting conductors which penetrate through the first through holes respectively.

2. The low voltage connector as claimed in claim 1, wherein the centerlines of the first plurality of through holes in the filter body are arranged in parallel.

3. The low voltage connector of claim 1, wherein the centerlines of the first plurality of through holes in the filter body are each straight.

4. The low-voltage connector as claimed in claim 2, wherein said fitting is stepped and wraps or partially wraps said filter body; the assembling portion comprises a second through hole for the low-voltage connecting conductor to pass through, and the center lines of the first through hole and the second through hole are located on the same straight line.

5. An electrical apparatus comprising a housing, a high voltage connector mounted on the exterior or periphery of the housing, and a low voltage connector as claimed in any of claims 1 to 4, wherein the electrical apparatus is adapted to receive a high voltage cable into the housing via the high voltage connector, and an external control signal cable is received into the housing via the low voltage connector.

6. The electrical device of claim 5, wherein the low voltage connector is accessed into the housing from a first direction of the housing, and the high voltage connector is accessed into the housing from a second direction of the housing, the first direction being perpendicular to the second direction.

7. The electrical apparatus of claim 6, wherein the high voltage connector comprises an insulating housing and a magnetic ring, and the insulating housing is integral with the magnetic ring; the insulating shell is provided with at least one wiring hole, and the at least one wiring hole penetrates through an inner window of the magnetic ring; the diameter of each wiring hole is matched with that of the high-voltage cable, and the central shaft of each wiring hole is parallel to the central shaft of the magnetic ring.

8. The electrical apparatus of claim 7, wherein the insulating housing has a plurality of wire holes formed therein, and the plurality of wire holes are arranged in a line within the inner window of the magnetic ring.

9. The electrical apparatus as claimed in claim 7, wherein the insulating housing includes a first connecting portion and a second connecting portion, the first connecting portion and the second connecting portion being arranged in a stepwise manner in a direction of a central axis of the magnetic ring, and an outer circumference of the first connecting portion having a size smaller than that of the second connecting portion; the magnetic ring is located at the second connecting portion, and the wire holes respectively penetrate through the first connecting portion and the second connecting portion.

10. The electrical apparatus of claim 7, wherein the insulating housing has a fixing portion thereon and a plug head portion, and the high-voltage connector is mounted to the housing through the fixing portion, the plug head portion including a female terminal or a male terminal for electrically conducting connection with the high-voltage cable;

the high-voltage connector comprises wiring terminals which are respectively fixed to the tail ends of the high-voltage cables in a crimping mode.

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