CN219760860U - Electromagnetic interference filter and electronic control device - Google Patents

Abstract

The utility model discloses an electromagnetic interference filter and electric control equipment, wherein the electromagnetic interference filter comprises a busbar assembly, an insulation assembly, a capacitor assembly and a magnetic ring assembly, the insulation assembly comprises a first insulation piece and a second insulation piece which are arranged at intervals, the busbar assembly is arranged on the first insulation piece in a penetrating way, the busbar assembly is provided with a first end exposed on the first insulation piece, and the second insulation piece is arranged on the first end of the busbar assembly; the capacitor component is arranged on the first insulating piece and is electrically communicated with the busbar component; the magnetic ring component is arranged on the insulating component and surrounds the busbar component; the magnetic ring component and the capacitor component are arranged at intervals and are insulated and isolated from the capacitor component and the busbar component. According to the electromagnetic interference filter, the insulating assembly is arranged, so that the insulating assembly plays a role in protecting the busbar assembly, the capacitor assembly and the magnetic ring assembly, and the service life of each filter element in the electromagnetic interference filter is prolonged; and each filter device is integrated on the insulating component, so that the whole volume of the filter is reduced.

Description

Electromagnetic interference filter and electronic control device

Technical Field

The utility model relates to the technical field of electronic power, in particular to an electromagnetic interference filter and electric control equipment.

Background

The electromagnetic interference filter is used for inhibiting electromagnetic interference generated by the inverter in the power system so as to enable the electromagnetic interference to meet the related index of electromagnetic compatibility.

In the related art, the electromagnetic interference filter mainly comprises a filter capacitor, a filter inductor and a busbar assembly, wherein the filter capacitor and the filter inductor are arranged on a circuit board in a scattered manner, the busbar assembly is composed of a direct-current positive busbar and a direct-current negative busbar, the filter capacitor and the direct-current positive busbar are overlapped, the ends of the direct-current positive busbar and the direct-current negative busbar are exposed out of a shell of the filter, the ends of the direct-current positive busbar and the direct-current negative busbar are easily damaged under the collision of external force, and the direct-current positive busbar and the direct-current negative busbar are easily contacted and short-circuited when being extruded and deformed under the strong external force, so that the functions of the electromagnetic interference filter can be greatly influenced.

Disclosure of Invention

According to the electromagnetic interference filter, the insulating assembly is arranged, so that the insulating assembly plays a role in protecting the busbar assembly, the capacitor assembly and the magnetic ring assembly, and the service life of each filter element in the electromagnetic interference filter is prolonged.

To achieve the above object, the present utility model provides an electromagnetic interference filter, including:

a busbar assembly;

the insulation assembly comprises a first insulation piece and a second insulation piece which are arranged at intervals along the extending direction of the busbar assembly, the busbar assembly penetrates through the first insulation piece, the busbar assembly is provided with a first end exposed to the first insulation piece, and the second insulation piece is arranged at the first end of the busbar assembly;

The capacitor assembly is arranged on the first insulating piece and is electrically communicated with the busbar assembly; and

the magnetic ring assembly is arranged on the insulating assembly and surrounds the busbar assembly; the magnetic ring assembly is arranged at intervals with the capacitor assembly, and the magnetic ring assembly is insulated and isolated from the capacitor assembly and the busbar assembly.

In an embodiment of the present utility model, the second insulating member is provided with a limiting space;

a baffle plate is arranged in the limiting space, and the baffle plate divides the limiting space into a first limiting space and a second limiting space;

the busbar assembly comprises an anode busbar and a cathode busbar, and the end part of the anode busbar and the end part of the cathode busbar are respectively accommodated in the first limiting space and the second limiting space.

In an embodiment of the present utility model, the electromagnetic interference filter further includes a bus bar assembly, the bus bar assembly including a positive bus bar and a negative bus bar;

the positive bus is electrically connected with the positive bus bar positioned in the first limiting space, and the negative bus bar is electrically connected with the negative bus bar positioned in the second limiting space.

In an embodiment of the present utility model, the positive bus bar and the negative bus bar are both high-voltage direct-current bus bars.

In an embodiment of the utility model, the insulation assembly further comprises a third insulation member;

the busbar assembly is further provided with a second end exposed to the first insulating piece, the third insulating piece is arranged at the second end of the busbar assembly, and the third insulating piece, the first insulating piece and the second insulating piece are sequentially arranged along the extending direction of the busbar assembly.

In an embodiment of the present utility model, the magnetic ring assembly includes at least two differential mode magnetic cores disposed on the third insulating member;

the busbar assembly comprises an anode busbar and a cathode busbar _， At least one differential mode magnetic core is arranged around the end part of the positive electrode busbar; at least one other differential mode magnetic core is arranged around the end part of the negative electrode busbar.

In one embodiment of the present utility model, the third insulating member is provided with a first mounting portion, and the first mounting portion is provided with at least two first mounting grooves;

the at least two first mounting grooves are arranged along the extending direction perpendicular to the busbar assembly, and one differential mode magnetic core is arranged in one first mounting groove.

In one embodiment of the utility model, the capacitive assembly includes at least two first Y capacitors and at least two first mounts;

the at least two first Y capacitors are arranged in the first insulating piece and are respectively positioned at two sides of the busbar assembly;

the first mounting piece is connected with the busbar assembly and the first Y capacitor, and the first Y capacitor is electrically conducted with the busbar assembly through the first mounting piece.

In an embodiment of the utility model, the first mounting part of the capacitor assembly includes a first screw connection part and a first abutting part which are connected and arranged at an included angle;

the first screw connection part is connected with the first insulating piece, the first abutting part abuts against the busbar assembly, and the first Y capacitor is electrically conducted with the busbar assembly;

the first screw connection part is provided with a first through hole, the first insulating part is provided with a plurality of first mounting columns, and each first mounting column is in plug-in fit with one first through hole;

or, one first mounting piece of the capacitor assembly comprises a first screw connection part and a first abutting part which are connected and are arranged at an included angle;

the first abutting part is welded to the busbar assembly, the first screw joint part is connected with the first insulating piece, and the first Y capacitor is electrically conducted with the busbar assembly;

The first screw connection part is provided with a first through hole, the first insulating piece is provided with a plurality of first mounting columns, and each first mounting column is in plug-in fit with one first through hole.

In an embodiment of the utility model, the capacitive assembly further comprises at least two second Y capacitors and at least two second mounts;

the at least two second Y capacitors are arranged in the first insulating piece and are respectively positioned at two sides of the busbar assembly;

the second mounting piece is connected with the busbar assembly and the second Y capacitor, and the second Y capacitor is electrically communicated with the busbar assembly through the second mounting piece;

the first Y capacitor and the second Y capacitor are arranged at intervals along the extending direction of the busbar assembly.

In an embodiment of the utility model, the second mounting part of the capacitor assembly includes a second screw connection part and a second abutting part which are connected and arranged at an included angle;

the second screw connection part is connected with the first insulating piece, the second abutting part abuts against the busbar assembly, and the second Y capacitor is electrically conducted with the busbar assembly;

the second screw connection part is provided with a second through hole, the first insulating part is provided with a plurality of second mounting columns, and each second mounting column is in plug-in fit with one second through hole;

Or, one second mounting piece of the capacitor assembly comprises a second screw connection part and a second abutting part which are connected and are arranged at an included angle;

the second abutting part is welded to the busbar assembly, the second screw joint part is connected with the first insulating piece, and the second Y capacitor is electrically conducted with the busbar assembly;

the second screw connection part is provided with a second through hole, the first insulating piece is provided with a plurality of second mounting columns, and each second mounting column is in plug-in fit with one second through hole.

In an embodiment of the utility model, the capacitor assembly further comprises:

the first X capacitors and the first Y capacitors are arranged on the periphery of the busbar assembly in a surrounding mode, each first X capacitor is arranged corresponding to two first Y capacitors, and each first X capacitor is provided with a third mounting piece; and

each first locking piece sequentially penetrates through the third mounting piece of the first X capacitor and the first mounting piece of the first Y capacitor and is connected with the first insulating piece, and the first X capacitor, the first Y capacitor and the first insulating piece are fixed, and the first X capacitor, the first Y capacitor and the busbar assembly are electrically conducted.

In one embodiment of the present utility model, the first insulating member is provided with a second mounting groove;

each first X capacitor is accommodated in the second mounting groove, and the third mounting piece of each first X capacitor extends out of the notch of the second mounting groove and is fixedly connected with one first Y capacitor and the first insulating piece.

In an embodiment of the utility model, the capacitor assembly further comprises:

at least one second X capacitor, at least two second Y capacitors and a plurality of second locking pieces,

the at least two second Y capacitors are arranged in the first insulating piece and are respectively positioned at two sides of the busbar assembly, and the first Y capacitors and the second Y capacitors are arranged at intervals along the extending direction of the busbar assembly;

each second X capacitor and each second Y capacitor are arranged on the periphery of the busbar assembly in a surrounding mode, each second X capacitor is arranged corresponding to two second Y capacitors, and each second X capacitor is provided with a fourth mounting piece;

each second locking piece sequentially penetrates through the fourth mounting piece of the second X capacitor and the second mounting piece of the second Y capacitor and is connected with the first insulating piece, the second X capacitor, the second Y capacitor and the first insulating piece are fixed, and the second X capacitor, the second Y capacitor and the busbar assembly are electrically conducted.

In an embodiment of the utility model, the magnetic ring assembly further comprises a common mode magnetic core;

the common-mode magnetic core is detachably connected to the first insulating piece, and the busbar assembly penetrates through an installation channel formed by surrounding the common-mode magnetic core; the first Y capacitor, the common-mode magnetic core and the second Y capacitor are sequentially arranged along the extending direction of the busbar assembly.

In order to achieve the above purpose, the utility model also provides an electric control device, which comprises the electromagnetic interference filter.

The electromagnetic interference filter comprises a busbar assembly, an insulation assembly, a capacitor assembly and a magnetic ring assembly, wherein the insulation assembly comprises a first insulation piece and a second insulation piece which are arranged at intervals along the extending direction of the busbar assembly, the first insulation piece can accommodate part of the busbar assembly, the second insulation piece is arranged at the first end of the busbar assembly, and the first insulation piece and the second insulation piece both play a role in protecting the busbar assembly. Because of the phenomenon that often appears colliding at the in-process of transporting electromagnetic interference filter, set up first insulating part and second insulating part and can avoid the collision damage of female row's subassembly and the circumstances that the female row of positive negative pole warp and looks short circuit to can keep the steady operating condition of filter, improve the reliability when the filter uses. In addition, the capacitor component is electrically connected with the busbar component to filter the electric signals input and output on the busbar component and inhibit electromagnetic interference; the magnetic ring component is arranged on the insulating component and is insulated and isolated from the busbar component and the capacitor component to form a filtering unit, so that the normal operation of the electromagnetic interference filter is ensured.

Compared with the traditional filter, the technical scheme provided by the utility model has the advantages that the filter devices such as the busbar assembly, the capacitor assembly and the magnetic ring assembly are integrated on the first insulating piece, so that the whole size of the electromagnetic interference filter is reduced, and the whole space utilization rate of the electromagnetic interference filter is improved.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of an electromagnetic interference filter according to an embodiment of the present utility model;

FIG. 2 is an exploded view of the EMI filter of FIG. 1;

FIG. 3 is a schematic view of the second insulator of FIG. 1;

FIG. 4 is a schematic view of the third insulator of FIG. 1;

FIG. 5 is a schematic view of a portion of the first insulator of FIG. 1;

Fig. 6 is a schematic structural diagram of the first X capacitor in fig. 1.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Electromagnetic interference filter	10	Busbar assembly
11	Positive electrode busbar	13	Negative electrode busbar
				15	First end	17	Second end
30	Insulation assembly	31	First insulating member
				311	First part	313	Second part
315	Second mounting groove	317	First mounting post
				33	Second insulating member	331	Partition board
333	First spacing space	335	Second spacing space
				35	Third insulating member	351	A first mounting part
353	A second mounting part	355	First mounting groove
				50	Capacitor assembly	51	First Y capacitor
511	First mounting piece	5111	First screw joint part
				5113	A first abutting part	5115	First through hole
53	Second Y capacitor	531	Second mounting member
				5311	Second screw joint part	5313	A second abutting part
55	First X capacitor	551	Third mounting member
				553	Third through hole	70	Magnetic ring assembly
71	Differential mode magnetic core	73	Common mode magnetic core

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

An electromagnetic interference filter 100 according to an embodiment of the present utility model is shown in fig. 1 and 2, and the electromagnetic interference filter 100 includes a busbar assembly 10, an insulation assembly 30, a capacitor assembly 50 and a magnetic ring assembly 70.

The insulation assembly 30 includes a first insulation member 31 and a second insulation member 33 disposed at intervals along the extending direction of the busbar assembly 10, the busbar assembly 10 is disposed through the first insulation member 31, the busbar assembly 10 has a first end 15 exposed to the first insulation member 31, and the second insulation member 33 is disposed at the first end 15 of the busbar assembly 10 and is used for protecting the busbar assembly 10.

The capacitor assembly 50 is mounted on the first insulating member 31 and is in electrical communication with the busbar assembly 10.

The magnetic ring assembly 70 is disposed on the insulating assembly 30 and surrounds the busbar assembly 10.

The magnetic ring assembly 70 is spaced from the capacitor assembly 50, and the magnetic ring assembly 70 is insulated from the capacitor assembly 50 and the busbar assembly 10.

In the present embodiment, the insulation assembly 30 includes a first insulation member 31 and a second insulation member 33 disposed at intervals along the extending direction of the busbar assembly 10, and the first insulation member 31 may be provided with a housing structure such as a groove, a cavity, or the like to accommodate a part of the structure of the busbar assembly 10. The second insulating member 33 is disposed at the first end 15 of the busbar assembly 10, where the first end 15 is an end portion of the busbar assembly 10 extending out of the first insulating member 31, and the first insulating member 31 and the second insulating member 33 both play a role in isolating and protecting the busbar assembly 10;

the second insulator 33 is used to protect the first end 15 of the busbar assembly 10. In this embodiment, the first end 15 of the busbar assembly 10 is used for connecting a high-voltage direct-current busbar, and the second insulating member 33 can be internally provided with a cavity and other structures to protect the busbar assembly, so that the connection stability of the first end 15 of the busbar assembly 10 and the high-voltage direct-current busbar is ensured.

Because collision damage is easy to occur in the process of transporting the electromagnetic interference filter 100, the first insulating member 31 and the second insulating member 33 can avoid the situation that the busbar assembly 10 is scratched and the positive and negative electrode busbar in the busbar assembly 10 is short-circuited due to deformation under the action of strong external force, so that the electromagnetic interference filter 100 can maintain a stable working state, and the reliability of the electromagnetic interference filter is improved.

The capacitor assembly 50 is electrically connected to the busbar assembly 10, and filters the electrical signals input and output from the busbar assembly 10 to suppress electromagnetic interference. The magnetic ring assembly 70 is disposed on the insulating assembly 30, and forms a filtering unit with the busbar assembly 10 and the capacitor assembly 50, so as to ensure the normal operation of the electromagnetic interference filter 100.

The first insulating member 31 and the second insulating member 33 may be made of polycarbonate, polyvinyl chloride, etc., and they may be connected and fixed with the busbar assembly 10 by sleeving, clamping, etc.

The electromagnetic interference filter 100 is used to keep noise generated inside the electronic control device from leaking outside, and prevent noise generated by an ac line outside the electronic control device from entering the device, so that the electronic control device can meet the related index of electromagnetic compatibility. Compared with the traditional filter in which the filter devices are arranged on the circuit board in a scattered manner, the embodiment of the application integrates the filter devices such as the busbar assembly 10, the capacitor assembly 50 and the magnetic ring assembly 70 on the first insulating piece 31, thereby reducing the volume of the electromagnetic interference filter 100 and improving the overall space utilization rate; the magnetic ring assembly 70 can be connected with the insulation assembly 30 in a sleeving, clamping or fixing connection manner, and the magnetic ring assembly 70 is insulated and isolated from the busbar assembly 10 and the capacitor assembly 50 so as to reduce electromagnetic interference.

In an embodiment of the present utility model, as shown in fig. 1 to 3, the second insulating member 33 is provided with a limiting space, a partition 331 is disposed in the limiting space, the partition 331 divides the limiting space on the second insulating member 33 into a first limiting space 333 and a second limiting space 335, the busbar assembly 10 includes a positive busbar 11 and a negative busbar 13, and an end of the positive busbar 11 and an end of the negative busbar 13 are respectively accommodated in the first limiting space 333 and the second limiting space 335.

In this embodiment, the limiting space may be a housing structure such as a groove or a cavity on the second insulating member 33, and the limiting space may be provided with a first opening communicating with the outside, or may be provided with a second opening through which the busbar assembly 10 may pass. The second insulating member 33 may be connected to the busbar assembly 10 by a socket connection, a clamping connection, or a screw connection. The second insulator 33 is provided therein with a partition 331 dividing an inner space thereof into a first limit space 333 and a second limit space 335 for mounting the positive electrode busbar 11 and the negative electrode busbar 13, respectively.

In this embodiment, a first limiting space 333 and a second limiting space 335 may be respectively provided with a first limiting groove and a second limiting groove, and the positive electrode busbar 11 and the negative electrode busbar 13 are respectively clamped to the bottom walls of the first limiting groove and the second limiting groove. From the above, by providing the separator 331, the ends of the positive electrode busbar 11 and the negative electrode busbar 13 can be separated, and the positive electrode busbar 11 and the negative electrode busbar 13 can not be directly contacted with each other to cause a short circuit of the filter due to deformation when collision occurs, thereby protecting the first end 15 of the busbar assembly 10 and ensuring the stability of the electromagnetic interference filter 100 during operation.

In an embodiment of the present utility model, as shown in connection with fig. 1 to 3, the electromagnetic interference filter 100 further includes a bus bar assembly including a positive bus bar electrically connected to the positive bus bar 11 located in the first limiting space 333 and a negative bus bar electrically connected to the negative bus bar 13 located in the second limiting space 335.

In this embodiment, before the second insulating member 33 is installed with the busbar assembly 10, the positive electrode busbar and the negative electrode busbar are installed in the first spacing space 333 and the second spacing space 335 respectively, after the second insulating member 33 is assembled with the busbar assembly 10, the positive electrode busbar is connected with the positive electrode busbar 11 of the busbar assembly 10 in the first spacing space 333 by screwing, welding or the like, the negative electrode busbar is connected with the negative electrode busbar 13 of the busbar assembly 10 in the second spacing space 335, and then the positive electrode busbar and the negative electrode busbar are led out from the first spacing space 333 and the second spacing space 335 to be connected with the upper-stage or lower-stage electronic control device of the electromagnetic interference filter 100, so that the connection between the positive electrode busbar, the negative electrode busbar and the busbar assembly 10 is stable and reliable, the arrangement of the first spacing space 333 and the second spacing space 335 is also convenient for operators to perform wiring operation, the separator also separates the positive electrode busbar and the negative electrode busbar, and the negative electrode busbar short circuit can be effectively avoided, and the safety and reliability of the electromagnetic interference filter 100 in use can be ensured.

In an embodiment of the present utility model, as shown in fig. 1 to 3, the positive bus bar and the negative bus bar are high voltage direct current type bus bars.

In this embodiment, the first end 15 of the busbar assembly 10 is a terminal of a high-voltage dc bus, that is, a high-voltage power supply signal flowing on the busbar assembly 10 is converted into a high-voltage dc signal for driving the next-stage electronic control device after being filtered by the capacitor assembly 50 and the magnetic ring assembly 70. The first end 15 of the busbar assembly 10 is isolated and protected through the second insulating piece 33, meanwhile, the positive and negative buses of the high-voltage direct current buses connected with the busbar assembly 10 are isolated through the first limiting space 333 and the second limiting space 335, the terminals of the busbar assembly 10 and the high-voltage direct current buses are respectively accommodated by the first limiting space 333 and the second limiting space 335, the short circuit of the positive bus and the negative bus can be effectively avoided, and the safety and the reliability of transmitting high-voltage direct current signals to the next-stage electronic control equipment through the positive bus and the negative bus are ensured.

In an embodiment of the present utility model, as shown in fig. 1, 2 and 4, the insulation assembly 30 further includes a third insulation member 35, the busbar assembly 10 further includes a second end 17 exposed from the first insulation member 31, the third insulation member 35 is disposed at the second end 17 of the busbar assembly 10, and the third insulation member 35, the first insulation member 31 and the second insulation member 33 are sequentially disposed along the extending direction of the busbar assembly 10.

In this embodiment, the third insulating member 35 is used to protect the second end 17 of the busbar assembly 10, and the first insulating member 31 and the second insulating member 33 are used to protect the busbar assembly 10 as a whole.

According to the electromagnetic interference filter 100, the insulation pieces adapted to the structures of the different filter devices are arranged according to the difference of the filter devices of each part, and compared with the case that one insulation piece is used for accommodating the filter devices, the insulation piece of the embodiment protects the busbar assembly 10 more thoroughly, so that space waste can be reduced, and the whole volume of the filter is reduced to the greatest extent on the premise of protecting the filter devices, so that the occupied volume of the filter is small in the electronic control equipment.

In an embodiment of the present utility model, as shown in fig. 1, 2 and 4, the magnetic ring assembly 70 includes at least two differential mode magnetic cores 71 disposed on the third insulating member 35, at least one differential mode magnetic core 71 is disposed around the end of the positive busbar 11; at least one other differential mode magnetic core 71 is disposed around the end of negative busbar 13.

In the present embodiment, the differential mode magnetic core 71 is used to suppress the disturbance electromagnetic field from generating differential mode disturbance between the positive electrode busbar 11 and the negative electrode busbar 13. In the present embodiment, at least one differential mode magnetic core 71 is disposed corresponding to an end portion of the positive busbar 11, and at least one other differential mode magnetic core 71 is disposed corresponding to an end portion of the negative busbar 13, so as to suppress differential mode interference between the positive busbar 11 and the negative busbar 13, and reduce electromagnetic interference of external electromagnetic signals to the electrical signals on the busbar assembly 10. In this embodiment, at least two differential mode magnetic cores 71 may be attached to the outer surface of the third insulating member 35, or may be fixed by glue filling after being disposed in the inner cavity of the third insulating member 35, which is not limited.

In an embodiment of the present utility model, as shown in fig. 1, 2 and 4, the third insulating member 35 includes a first mounting portion 351, where the first mounting portion 351 is provided with at least two first mounting grooves 355, each of the first mounting grooves 355 is disposed along a direction perpendicular to an extending direction of the busbar assembly 10, and a differential mode magnetic core 71 is disposed in one of the first mounting grooves 355.

In the present embodiment, the third insulator 35 also serves to protect the differential mode magnetic core 71, and the first mounting portion 351 serves to house the differential mode magnetic core 71. When the number of differential mode magnetic cores 71 in the present embodiment includes two, the two differential mode magnetic cores 71 are respectively mounted in the two first mounting grooves 355; it will be appreciated that the third insulator 35 further includes a second mounting portion 353 for protecting the second end 17 of the busbar assembly 10, and that the third insulator 35 and the busbar assembly 10 may be integrally formed by injection molding to adapt the configuration of the third insulator 35 and the second end 17 of the busbar assembly 10. Each differential mode magnetic core 71 comprises two half-ring differential mode magnets, a protrusion can be arranged in the first mounting groove 355, a channel for the busbar assembly 10 to pass through is arranged in the protrusion, the protrusion is arranged between the two half-ring differential mode magnets in a surrounding manner, and then glue is filled into the first mounting groove 355, so that the connection stability between the differential mode magnetic core 71 and the first mounting groove 355 is kept, and the differential mode magnetic core 71 can be prevented from being damaged under the collision condition.

In an embodiment of the present utility model, as shown in fig. 1, 2 and 4, the capacitor assembly 50 includes at least two first Y capacitors 51 and at least two first mounting members 511, where the at least two first Y capacitors 51 are disposed in the first insulating member 31 and are respectively located at two sides of the busbar assembly 10; each first mounting member 511 connects the busbar assembly 10 to each first Y capacitor 51, and the first Y capacitors 51 are in electrical communication with the busbar assembly 10 via the first mounting member 511.

In this embodiment, the first Y capacitor 51 is used to filter out common mode noise. At least two first Y electric capacities 51 can be installed on the periphery of the first insulating member 31 in an adhering manner, and can also be installed in the first insulating member 31, at least two first Y electric capacities 51 are located on two sides of the busbar assembly 10, each first installation member 511 corresponds to one first Y electric capacity 51, the first installation member 511 can be arranged on one face, facing the busbar assembly 10, of the first Y electric capacities 51, and the first Y electric capacities 51 and the busbar assembly 10 are electrically conducted through the first installation members 511 attached to the busbar assembly 10. Since the busbar assembly 10 to be filtered includes the positive busbar 11 and the negative busbar 13, the number of the first Y capacitors 51 needs to be set to be two, for example, the number of the first Y capacitors 51 may be four, six or eight, and the first Y capacitors 51, the busbar assembly 10 and the magnetic ring assembly 70 form an LC resonant circuit.

In an embodiment of the present utility model, as shown in fig. 1 and 2, the capacitor assembly 50 further includes at least two second Y capacitors 53 and at least two second mounting members 531, where the at least two second Y capacitors 53 are disposed in the first insulating member 31 and are respectively located on two sides of the busbar assembly 10; each second mounting piece 531 connects the busbar assembly 10 and each second Y capacitor 53, and the second Y capacitors 53 are electrically connected to the busbar assembly 10 through the second mounting pieces 531; the first Y capacitor 51 and the second Y capacitor 53 are disposed at intervals along the extension direction of the busbar assembly 10.

In this embodiment, the second Y capacitor 53 is used to filter out common mode noise. The at least two second Y capacitors 53 may be mounted on the outer periphery of the first insulating member 31 in an adhesive manner, or may be mounted in the first insulating member 31 and located on two sides of the busbar assembly 10, where the busbar assembly 10 is correspondingly provided with at least two first mounting members 31. Each second mounting piece 531 is arranged on a second Y capacitor 53 corresponding to one second Y capacitor, and the second mounting pieces 531 are attached to the busbar assembly 10, so that the first Y capacitor 51 and the busbar assembly are electrically conducted, electric signal transmission between the second Y capacitor 53 and the busbar assembly 10 is stable, and reliability of the filter is improved. In this embodiment, the capacitor assembly 50 may include two first Y capacitors 51 and two second Y capacitors 53, and form a CLC topology structure with the magnetic ring assembly 70, and the filter of this embodiment may enhance the filtering of common mode noise, and may also more easily achieve the electromagnetic compatibility index requirement, so that the index requirements on other structures in the filter may be relaxed, the difficulty in manufacturing the filter is reduced, and the production cost is further reduced.

It will be appreciated that the capacitor assembly 50 may be configured according to different requirements of the electronic control device, and may include a first Y capacitor 51, or include a second Y capacitor 53, and may further include the first Y capacitor 51 and the second Y capacitor 53; the second mounting member of the first Y capacitor 51 and the second mounting member 531 of the second Y capacitor 53 may or may not coincide, and similarly, the first mounting member 511 and the second mounting member 531 may or may not coincide; when the capacitor assembly 50 includes only the second Y capacitors 53, the number thereof is also set to be a double number, for example, the second Y capacitors 53 include two, four, six, etc., which is not limited herein. In this embodiment, the volume of the first Y capacitor 51 is larger than the volume of the second Y capacitor 53.

In other embodiments of the present utility model, a receiving groove for mounting the first Y capacitor 51 and the second Y capacitor 53 may be formed in the first insulating member 31, and the first Y capacitor 51 and the second Y capacitor 53 may be provided at a distance from the first insulating member 31.

In an embodiment of the present utility model, as shown in fig. 1 and 2, the capacitor assembly 50 further includes at least one second X capacitor and a plurality of second locking members, each second X capacitor and each second Y capacitor 53 are annularly disposed on the periphery of the busbar assembly 10, each second X capacitor is disposed corresponding to two second Y capacitors 53, and each second X capacitor is provided with a fourth mounting member; a second locking member sequentially penetrates through a fourth mounting member of a second X capacitor and a second mounting member 531 of a second Y capacitor 53 and is connected to the first insulating member 31, so that the second X capacitor, the second Y capacitor 53 and the first insulating member 31 are fixed, and each second X capacitor and each second Y capacitor 53 are electrically connected with the busbar assembly 10.

In this embodiment, the second X capacitor is used to filter out differential mode noise. Each of the second X capacitors and each of the second Y capacitors 53 are disposed around the periphery of the busbar assembly 10, for example, as shown in fig. 2, the second X capacitors may be disposed above the busbar assembly 10, two second Y capacitors 53 are disposed on the front side or the rear side of the busbar assembly 10, and the second X capacitors are disposed above the two second Y capacitors 53. The second X capacitor is arranged corresponding to the second Y capacitor 53, the second locking piece sequentially penetrates through the fourth mounting piece and the second mounting piece 531 and is connected with the first insulating piece 31 in a threaded connection and plug connection mode, and after the second X capacitor is mounted, the second X capacitor and the first insulating piece 31 are integrally formed in an injection molding mode.

The second X capacitor, the second Y capacitor 53 and the first insulating member 31 are fixedly connected, and the first insulating member 31 does not need to additionally increase space to install the second X capacitor, so that the type of signals which can be filtered by the filter is increased while the internal space of the filter is saved, the applicability of the filter is further improved, and the filter can be used for electric control equipment with different requirements.

In an embodiment of the utility model, as shown in fig. 1 and 2, the first mounting member 511 of each capacitor assembly 50 includes a first threaded portion 5111 and a first abutting portion 5113 connected to each other and disposed at an included angle, the first threaded portion 5111 is connected to the first insulating member 31, the first abutting portion 5113 abuts against the busbar assembly 10, and a first through hole 5115 is formed in the first threaded portion 5111; the first insulating member 31 is provided with a plurality of first mounting posts 317, and each first mounting post 317 is in plug-fit with a first through hole 5115.

In this embodiment, the first screw connection portion 5111 is configured to be connected to and matched with the first insulating member 31, and the first abutting portion 5113 is configured to be abutted to and conducted with the busbar assembly 10, so that the capacitor assembly 50 can filter out the electrical signal passing through the busbar assembly 10. The first screw connection portion 5111 and the first abutting portion 5113 are disposed at an included angle, and the included angle may be an acute angle, a right angle or an obtuse angle, which is not limited in this embodiment. The first mounting post 317 provided on the first insulating member 31 may be inserted and engaged with the first through hole 5115 provided on the first screw portion 5111 to maintain a reliable positioning and stable connection between the first Y-capacitor 51 and the first insulating member 31.

In other embodiments of the present utility model, the first abutting portion 5113 of the first mounting piece 511 is welded with the busbar assembly 10, and the first screw portion 5111 is connected to the first Y capacitor 51 by a welded and abutting connection manner, so as to realize electrical conduction between the first Y capacitor 51 and the busbar assembly 10. To maintain the connection stability between the first Y-capacitor 51 and the busbar assembly 10, a first through hole 5115 may be provided in the first threaded portion 5111 to be in a plug-fit with the first mounting post 317 of the first insulating member 31.

In an embodiment of the utility model, as shown in fig. 1 and 2, each second mounting member 531 includes a second threaded portion 5311 and a second abutting portion 5313 connected to each other and disposed at an included angle, the second threaded portion 5311 is connected to the first insulating member 31, the second abutting portion 5313 abuts against the busbar assembly 10, and a second through hole is formed in the second threaded portion 5311; the first insulating member 31 is provided with a plurality of second mounting posts, and each second mounting post is in plug-in fit with a second through hole.

In this embodiment, the second screw connection portion 5311 is configured to be cooperatively connected with the first insulating member 31, and the second abutting portion 5313 is configured to abut against the busbar assembly 10, so that the capacitor assembly 50 can filter an electrical signal passing through the busbar assembly 10. The second screw connection portion 5311 and the second abutting portion 5313 are disposed at an included angle, and the included angle may be an acute angle, a right angle or an obtuse angle, which may be a right angle in this embodiment. The second mounting post provided on the first insulating member 31 can be inserted and matched with the second through hole provided on the second screw connection portion 5311, so as to maintain stable connection between the first insulating members 31 of the second Y capacitor 53, and also protect the second Y capacitor 53.

In other embodiments of the present utility model, the second abutting portion 5313 of the second mounting member 531 is welded with the busbar assembly 10, and the second screw portion 5311 is connected to the second Y capacitor 53 by a welded, abutting connection manner, so as to achieve electrical conduction between the second Y capacitor 53 and the busbar assembly 10. In order to maintain the connection stability between the second Y capacitor 53 and the busbar assembly 10, a second through hole may be provided on the second screw portion 5311 to be in plug-fit with a second mounting post on the first insulating member 31.

In an embodiment of the present utility model, as shown in fig. 1 and 2, the capacitor assembly 50 further includes a first X capacitor 55 and a plurality of second locking members, each first X capacitor 55 and each first Y capacitor 51 are disposed around the periphery of the busbar assembly 10, each first X capacitor 55 is disposed corresponding to two first Y capacitors 51, each first X capacitor 55 is provided with a third mounting member 551, and each second locking member sequentially penetrates the third mounting member 551 of one first X capacitor 55 and the first mounting member 511 of one first Y capacitor 51 and is connected with the first insulating member 31, so as to fix the first X capacitor 55, the first Y capacitor 51 and the first insulating member 31, and electrically connect the first X capacitor 55 and the first Y capacitor 51 with the busbar assembly 10.

In this embodiment, the first X capacitor 55 is used to filter out differential mode noise. As shown in fig. 2, the first X capacitors 55 may be disposed above the busbar assembly 10, two first Y capacitors 51 are disposed at the front side or the rear side of the busbar assembly 10, and the first X capacitors 55 are disposed above the two first Y capacitors 51. The third mount 551 provided on the first X capacitor 55 serves to maintain stable connection with the first Y capacitor 51 and the first insulating member 31, so that the filtering effect is enhanced. By providing the third through hole 553 on the third mounting piece 551, the second locking piece sequentially passes through the third through hole 553 and the hole on the first threaded portion 5111 to be connected with the first insulating piece 31; the connection manner of the second X capacitor and the first insulating member 31 may be referred to as a connection manner of the first insulating member 31.

It can be known from the above that the second X capacitor is disposed corresponding to the second Y capacitor 53, the first X capacitor 55 is disposed corresponding to the first Y capacitor 51, and the second X capacitor and the first X capacitor 55 are mounted without adding a new mounting portion in the first insulating member 31, but using the space remaining on the first insulating member 31 to mount the second X capacitor and the first X capacitor, so that the filterable signal types of the filter are increased on the premise of saving space, and the applicable scene of the filter 100 in the embodiment is enriched.

It can be understood that the differential mode noise is generated between the power lines, and is that the noise source enters in series to the power lines, so that the frequency of the differential mode interference is smaller, and the second X capacitor and the first X capacitor 55 can be selected for filtering; the common mode noise is noise that the noise current leaked through the stray capacitance and the like returns to the power line through the ground, the frequency of common mode interference is large, and the first Y capacitance 51 and the second Y capacitance 53 can be selected for filtering. Because in many electronic control devices, the differential mode interference and the common mode interference exist at the same time, the filter 100 of the present embodiment can select the components of the capacitor assembly 50 according to the frequency of the signal to be filtered, for example, the capacitor assembly 50 includes a first Y capacitor 51, a second Y capacitor 53 and a second X capacitor, and forms a CLCC topology structure with the magnetic ring assembly 70; or the capacitor assembly 50 comprises a first Y capacitor 51 and a second X capacitor, and forms a topological structure of the CLC with the magnetic ring assembly 70; of course, one or more topologies selected from the second Y capacitor 53, the second X capacitor and the first X capacitor 55 and forming other forms with the first Y capacitor 51 may also be used, and will not be described in detail herein.

In an embodiment of the present utility model, as shown in fig. 2, 5 and 6, the first insulating member 31 is provided with a second mounting groove 315, the first X capacitor 55 is accommodated in the second mounting groove 315, and the third mounting member 551 of the first X capacitor 55 protrudes from a notch of the second mounting groove 315 and is fixed with the first Y capacitor 51 and the first insulating member 31.

In this embodiment, the first insulating member 31 may be divided into two detachable parts, a first part 311 for mounting both the Y capacitors and the busbar assembly 10, and a second part 313 for mounting the first X capacitor 55 and isolating the common mode core 73 from the busbar assembly 10. The second portion 313 includes a second mounting slot 315 on a side facing the second end 17 of the busbar assembly 10 for receiving the first X-capacitor 55 and protecting the first X-capacitor 55; the third mounting member 551 (i.e., the pin end) of the first X-capacitor 55 extends out of the notch of the second mounting slot 315, and is engaged with the first Y-capacitor 51 and can be connected to the first portion 311 by a threaded or plug-in manner.

In an embodiment of the present utility model, as shown in fig. 2, 5 and 6, the first insulating member 31 is provided with a third mounting groove, the second X capacitor is accommodated in the third mounting groove, and the third mounting member of the second X capacitor extends out of the notch of the third mounting groove and is fixed with the second Y capacitor 53 and the first insulating member 31.

In this embodiment, the manner in which the second X capacitor is mounted in the third mounting groove may refer to the manner in which the first X capacitor 55 is mounted in the second mounting groove 315, which is not described herein again. When the first insulating member 31 is provided with the second mounting groove 315 and the third mounting groove, it may be disposed at both sides of the second portion 313 in the extending direction of the busbar assembly 10 and spaced apart.

In an embodiment of the present utility model, as shown in fig. 1 and 2, the magnetic ring assembly 70 further includes a common-mode magnetic core 73, the common-mode magnetic core 73 is detachably connected to the first insulating member 31, and the busbar assembly 10 is disposed in an installation channel formed by enclosing the common-mode magnetic core 73; the first Y capacitor 51, the common-mode core 73, and the second Y capacitor 53 are sequentially disposed along the extension direction of the busbar assembly 10.

In the present embodiment, the common mode core 73 is a common mode disturbance that is formed by suppressing disturbance electromagnetic field to generate a common mode current between the line and the ground, and the common mode current generates a differential mode voltage on the load to cause disturbance.

Each common-mode magnetic core 73 comprises two half-ring common-mode magnets, the two half-ring common-mode magnets are detachably connected with the first insulating piece 31, and the busbar assembly 10 is arranged in an installation channel formed by encircling the common-mode magnetic cores 73 in a penetrating manner; the first Y capacitor 51, the common mode magnetic core 73 and the second Y capacitor 53 are sequentially arranged along the extending direction of the busbar assembly 10, so that the whole size of the filter is not excessively large while the normal operation of the filter circuit is maintained.

It will be appreciated that the common-mode core 73 should be installed close to the interference source, and should be close to the entrance and exit of the shielding case as much as possible for the input/output circuit, in this embodiment, the differential-mode core 71 and the common-mode core 73 may be simultaneously provided, which can simultaneously satisfy the high-frequency filtering requirement for the input signal with low impedance and the input signal with high impedance, so that the effect of suppressing interference is better, and the applicable power range is wider.

The embodiment of the utility model also provides an electric control device, which comprises the electromagnetic interference filter 100 in each embodiment.

The electric control device in this embodiment may be a motor controller, a frequency converter, or an electric welding machine, or may be other devices that need to filter out power noise, which is not limited herein. Taking a servo motor as an example, the servo motor comprises a shell and an electromagnetic interference filter 100, and a busbar assembly 10 of the electromagnetic interference filter 100 is electrically connected with a power supply terminal of a power supply module; the outer wall of the insulating assembly 30 of the electromagnetic interference filter 100 may be provided with mounting holes, through which the electromagnetic interference filter 100 may be connected to the casing of the electronic control device, so that the electromagnetic interference filter 100 is in a stable state as a whole. The integrated package of the busbar assembly 10, the capacitor assembly 50 and the magnetic ring assembly 70 in the electromagnetic interference filter 100 is realized in the insulating assembly 30, so that the compactness of the structure and the miniaturization of the volume of the electromagnetic interference filter 100 are realized. Because the electric control equipment adopts all the technical schemes of all the embodiments, the electric control equipment at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims (16)

1. An electromagnetic interference filter, the electromagnetic interference filter comprising:

a busbar assembly;

the insulation assembly comprises a first insulation piece and a second insulation piece which are arranged at intervals along the extending direction of the busbar assembly, the busbar assembly penetrates through the first insulation piece, the busbar assembly is provided with a first end exposed to the first insulation piece, and the second insulation piece is arranged at the first end of the busbar assembly;

the capacitor assembly is arranged on the first insulating piece and is electrically communicated with the busbar assembly; and

the magnetic ring assembly is arranged on the insulating assembly and surrounds the busbar assembly; the magnetic ring assembly is arranged at intervals with the capacitor assembly, and the magnetic ring assembly is insulated and isolated from the capacitor assembly and the busbar assembly.

2. The electromagnetic interference filter of claim 1, wherein the second insulator is provided with a spacing space;

a baffle plate is arranged in the limiting space, and the baffle plate divides the limiting space into a first limiting space and a second limiting space;

the busbar assembly comprises an anode busbar and a cathode busbar, and the end part of the anode busbar and the end part of the cathode busbar are respectively accommodated in the first limiting space and the second limiting space.

3. The electromagnetic interference filter of claim 2, further comprising a bus bar assembly comprising a positive bus bar and a negative bus bar;

the positive bus is electrically connected with the positive bus bar positioned in the first limiting space, and the negative bus bar is electrically connected with the negative bus bar positioned in the second limiting space.

4. The electromagnetic interference filter of claim 3, wherein the positive bus and the negative bus are both high voltage dc buses.

5. The electromagnetic interference filter of claim 1, wherein the insulation assembly further comprises a third insulation member;

the busbar assembly is further provided with a second end exposed to the first insulating piece, the third insulating piece is arranged at the second end of the busbar assembly, and the third insulating piece, the first insulating piece and the second insulating piece are sequentially arranged along the extending direction of the busbar assembly.

6. The electromagnetic interference filter of claim 5, wherein the magnetic loop assembly comprises at least two differential mode magnetic cores disposed on the third insulator;

the busbar assembly comprises an anode busbar and a cathode busbar _， At least one differential mode magnetic core is arranged around the end part of the positive electrode busbar; at least one other differential mode magnetic core surrounds the negative electrode busbarIs arranged at the end of the frame.

7. The electromagnetic interference filter of claim 6, wherein the third insulator is provided with a first mounting portion, the first mounting portion being provided with at least two first mounting grooves;

at least two first mounting grooves are formed along the extending direction perpendicular to the busbar assembly, and one differential mode magnetic core is arranged in one first mounting groove.

8. The electromagnetic interference filter of any one of claims 1-7, wherein the capacitive assembly comprises at least two first Y capacitors and at least two first mounts;

the at least two first Y capacitors are arranged in the first insulating piece and are respectively positioned at two sides of the busbar assembly;

the first mounting piece is connected with the busbar assembly and the first Y capacitor, and the first Y capacitor is electrically conducted with the busbar assembly through the first mounting piece.

9. The electromagnetic interference filter of claim 8, wherein the first mounting member of each of the capacitive assemblies comprises a first threaded portion and a first abutment portion connected and disposed at an angle;

The first screw connection part is connected with the first insulating piece, the first abutting part abuts against or is welded to the busbar assembly, and the first Y capacitor is electrically conducted with the busbar assembly;

the first screw connection part is provided with a first through hole, the first insulating piece is provided with a plurality of first mounting columns, and each first mounting column is in plug-in fit with one first through hole.

10. The electromagnetic interference filter of claim 8, wherein the capacitive assembly further comprises at least two second Y capacitors and at least two second mounts;

the at least two second Y capacitors are arranged in the first insulating piece and are respectively positioned at two sides of the busbar assembly;

the second mounting piece is connected with the busbar assembly and the second Y capacitor, and the second Y capacitor is electrically communicated with the busbar assembly through the second mounting piece;

the first Y capacitor and the second Y capacitor are arranged at intervals along the extending direction of the busbar assembly.

11. The electromagnetic interference filter of claim 10, wherein one of the second mounting members of the capacitive assembly comprises a second threaded portion and a second abutting portion connected and disposed at an angle;

The second screw connection part is connected with the first insulating piece, the second abutting part abuts against or is welded to the busbar assembly, and the second Y capacitor is electrically conducted with the busbar assembly;

the second screw connection part is provided with a second through hole, the first insulating piece is provided with a plurality of second mounting columns, and each second mounting column is in plug-in fit with one second through hole.

12. The electromagnetic interference filter of claim 8, wherein the capacitive assembly further comprises:

the first X capacitors and the first Y capacitors are arranged on the periphery of the busbar assembly in a surrounding mode, each first X capacitor is arranged corresponding to two first Y capacitors, and each first X capacitor is provided with a third mounting piece; and

each first locking piece sequentially penetrates through the third mounting piece of the first X capacitor and the first mounting piece of the first Y capacitor and is connected with the first insulating piece, and the first X capacitor, the first Y capacitor and the first insulating piece are fixed, and the first X capacitor, the first Y capacitor and the busbar assembly are electrically conducted.

13. The electromagnetic interference filter of claim 12, wherein the first insulator is provided with a second mounting slot;

Each first X capacitor is accommodated in the second mounting groove, and the third mounting piece of each first X capacitor extends out of the notch of the second mounting groove and is fixedly connected with one first Y capacitor and the first insulating piece.

14. The electromagnetic interference filter of claim 8, wherein the capacitive assembly further comprises at least one second X capacitor, at least two second Y capacitors, and a plurality of second locking members;

the at least two second Y capacitors are arranged in the first insulating piece and are respectively positioned at two sides of the busbar assembly, and the first Y capacitors and the second Y capacitors are arranged at intervals along the extending direction of the busbar assembly;

each second X capacitor and each second Y capacitor are arranged on the periphery of the busbar assembly in a surrounding mode, each second X capacitor is arranged corresponding to two second Y capacitors, and each second X capacitor is provided with a fourth mounting piece;

each second locking piece sequentially penetrates through the fourth mounting piece of the second X capacitor and the second mounting piece of the second Y capacitor and is connected with the first insulating piece, the second X capacitor, the second Y capacitor and the first insulating piece are fixed, and the second X capacitor, the second Y capacitor and the busbar assembly are electrically conducted.

15. The electromagnetic interference filter as set forth in claim 10 or 14, wherein the magnetic loop assembly further comprises a common mode magnetic core;

the common-mode magnetic core is detachably connected to the first insulating piece, and the busbar assembly penetrates through an installation channel formed by surrounding the common-mode magnetic core; the first Y capacitor, the common-mode magnetic core and the second Y capacitor are sequentially arranged along the extending direction of the busbar assembly.

16. An electronic control device, characterized in that it comprises an electromagnetic interference filter according to any one of claims 1 to 15.