Filter and motor controller

Abstract

The utility model relates to the technical field of automobile parts, and provides a filter and a motor controller. The filter comprises an integrated magnetic core which comprises an annular common mode magnetic core and a differential mode piece inserted in the common mode magnetic core, and the differential mode piece and a part of magnetic circuit of the common mode magnetic core form a differential mode magnetic core; the body of the copper bar assembly is wound on the integrated magnetic core; the integrated protective shell comprises a first protective shell wrapping the integrated magnetic core and a second protective shell wrapping the leading-out part of the copper bar assembly, and the first protective shell and the second protective shell are integrally formed. According to the utility model, the differential mode piece is inserted into the common mode magnetic core to form the integrated magnetic core, so that the differential mode filtering performance can be realized without increasing the volume of the magnetic ring, an X capacitor in a filter can be replaced, and the volume and design difficulty of the filter are reduced; in addition, the protective shell of the magnetic core part and the protective shell of the copper bar part are integrally designed, so that the dispensing and assembling procedures can be reduced, and the number of molds can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a filter and a motor controller. Background Art

[0002] Filters can filter out or mitigate noise in electronic signals and filter electronic signals. Filters are often used in automotive electrical appliances such as motor controllers to achieve filtering.

[0003] Conventional filters are usually composed of X capacitors, Y capacitors, common mode magnetic rings, protective shells, copper bars, etc. Among them, X capacitors are used to filter differential mode noise, and Y capacitors and common mode magnetic rings are used to filter common mode noise. Conventional filters have the following disadvantages:

[0004] During assembly, the common-mode magnetic ring is installed into the protective shell and fixed by glue dispensing, the lead-out part of the copper bus is also installed into the protective shell and fixed by glue dispensing, and then the two parts of the protective shell are glued and assembled. There are multiple glue dispensing and assembly processes, which not only increases the working procedures but also increases the number of mold opening components.

[0005] In addition, the X capacitor is large in size, which will increase the size of the filter and bring challenges to the structural design of the filter.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the utility model, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Utility Model Content

[0007] In view of this, the utility model provides a filter and a motor controller. By inserting a differential mode sheet into a common mode magnetic core to form an integrated magnetic core, the differential mode filtering performance can be achieved without increasing the volume of the magnetic ring, and the X capacitor in the filter can be replaced, thereby reducing the volume and design difficulty of the filter. In addition, the protective shell of the magnetic core part and the protective shell of the copper busbar part are integrated into an integrated design, which can reduce the dispensing and assembly processes and reduce the number of molds.

[0008] One aspect of the utility model provides a filter, comprising: an integrated magnetic core, comprising an annular common-mode magnetic core and a differential-mode sheet inserted in the common-mode magnetic core, wherein the differential-mode sheet and a partial magnetic circuit of the common-mode magnetic core constitute a differential-mode magnetic core; a copper busbar assembly, wherein the main body of the copper busbar assembly is wound on the integrated magnetic core; an integrated protective shell, comprising a first protective shell covering the integrated magnetic core and a second protective shell covering the lead-out portion of the copper busbar assembly, wherein the first protective shell and the second protective shell are integrally formed.

[0009] In some embodiments, the differential mode chip is an iron silicon differential mode chip.

[0010] In some embodiments, the input end of the copper busbar assembly passes through a gap between the common mode magnetic core and the differential mode sheet, and the output end of the copper busbar assembly is led out.

[0011] In some embodiments, a plastic package is provided at the input end of the copper busbar assembly, and the plastic package clamps the integrated magnetic core.

[0012] In some embodiments, the copper bar assembly includes a positive copper bar and a negative copper bar; the bodies of the positive copper bar and the negative copper bar are respectively wound on the common mode magnetic core to form a common mode inductor; the bodies of the positive copper bar and / or the negative copper bar are also wound on corresponding differential mode sheets to form a differential mode inductor, wherein the number of the differential mode sheets is less than or equal to the number of copper bars in the copper bar assembly.

[0013] In some embodiments, the copper busbar assembly also includes a charging copper busbar; the body of the charging copper busbar is wound on the common mode magnetic core to form a common mode inductor with the negative copper busbar wound on the common mode magnetic core; the body of the charging copper busbar is also wound on a corresponding differential mode sheet to form a differential mode inductor.

[0014] In some embodiments, the filter forms a filtering circuit from the input end of the copper busbar assembly, sequentially through the common-mode inductor and the differential-mode inductor, to the output end of the copper busbar assembly.

[0015] In some embodiments, the integrated magnetic core includes two; the filter forms a filtering circuit from the input end of the copper busbar assembly, through the common-mode inductance and differential-mode inductance of the first integrated magnetic core and the common-mode inductance and differential-mode inductance of the second integrated magnetic core, to the output end of the copper busbar assembly.

[0016] In some embodiments, the filter further includes: a Y capacitor connected in parallel between the input end of the copper busbar assembly and the ground end of the filter.

[0017] Another aspect of the present invention provides a motor controller, wherein the motor controller is equipped with a filter as described in any of the above embodiments.

[0018] Compared with the prior art, the beneficial effects of the present invention include at least:

[0019] By inserting the differential mode sheet into the common mode core to form an integrated core, the differential mode sheet and part of the magnetic circuit of the common mode core form a differential mode core, that is, the differential mode filter part reuses the magnetic core magnetic circuit of the common mode filter part, so that the differential mode filtering performance is achieved without increasing the volume of the magnetic ring, and then the X capacitor in the filter can be replaced, reducing the volume and design difficulty of the filter;

[0020] In addition, the first protective shell covering the integrated magnetic core and the second protective shell covering the lead-out portion of the copper busbar assembly are designed as an integrated whole, which can reduce the glue dispensing and assembly processes, reduce the amount of glue, and reduce the number of molds.

[0021] It should be understood that the above general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present utility model, and together with the specification, are used to explain the principles of the present utility model. Obviously, the drawings described below are only some embodiments of the present utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figures 1 to 3 A schematic diagram showing the structure of a filter in an embodiment of the utility model is shown;

[0024] Figure 4 The equivalent circuit diagram of the filter in the embodiment of the utility model is shown. DETAILED DESCRIPTION

[0025] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein. Instead, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated description will be omitted.

[0026] The words "first", "second" and the like used in the specific description do not indicate any order, quantity or importance, but are only used to distinguish different components. In addition, in the description of the present invention, when a device is said to be "connected" to another device, this includes not only the case of direct connection, but also the case of indirect connection through other elements.

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in different embodiments may be combined with each other.

[0028] Figures 1 to 3 The structure of the filter in the embodiment of the utility model is shown in FIG. Figures 1 to 3 As shown, the filter provided by the embodiment of the utility model includes:

[0029] The integrated magnetic core 10 includes a ring-shaped common-mode magnetic core 11 and a differential-mode sheet 12 inserted in the common-mode magnetic core 11, wherein the differential-mode sheet 12 and a part of the magnetic circuit of the common-mode magnetic core 11 form a differential-mode magnetic core;

[0030] The copper busbar assembly 20 is wound around the integrated magnetic core 10;

[0031] The integrated protective shell 30 includes a first protective shell 31 covering the integrated magnetic core 10 and a second protective shell 32 covering the lead-out portion of the copper busbar assembly 20 . The first protective shell 31 and the second protective shell 32 are integrally formed.

[0032] The common mode magnetic core 11 is formed in a ring shape, and the copper busbar assembly 20 (including at least a positive pole and a negative pole) is wound on the common mode magnetic core 11 to form a common mode inductor. The differential mode sheet 12 is inserted into the common mode magnetic core 11, and forms a ring-shaped differential mode magnetic core with a part of the magnetic circuit of the common mode magnetic core 11, and the copper busbar assembly 20 is wound on the differential mode sheet 12 to form a differential mode inductor. The winding method of the common mode inductor and the differential mode inductor is already available, and the present invention does not limit this.

[0033] In this way, by inserting the differential mode sheet 12 into the common mode core 11 to form an integrated magnetic core 10, the differential mode sheet 12 and part of the magnetic circuit of the common mode core 11 form a differential mode magnetic core, that is, the differential mode filter part reuses the core magnetic circuit of the common mode filter part, and the differential mode filtering performance is achieved without increasing the volume of the magnetic ring, thereby replacing the X capacitor in the filter, reducing the volume and design difficulty of the filter.

[0034] In addition, the first protective shell 31 and the second protective shell 32 are integrally formed, which can reduce the dispensing and assembly processes in the filter assembly process, reduce the amount of glue, and reduce the number of molds. The integrated protective shell 30 only needs one mold for integral injection molding to form. The integrated magnetic core 10 and the first protective shell 31, and the lead-out part of the copper bar assembly 20 and the second protective shell 32 can be fixed and assembled by dispensing glue, potting glue, or clamping plastic parts. Subsequently, the cover plate 50 can be used to connect and install with the integrated protective shell 30 to achieve encapsulation protection of the internal components of the filter.

[0035] In some embodiments, the differential mode sheet 12 is an iron silicon differential mode sheet. The iron silicon differential mode sheet is made of an alloy material composed of elements such as iron and silicon, has strong magnetic properties and low iron loss, and is suitable for high-frequency electrical equipment. By forming a differential mode magnetic core with a partial magnetic circuit of the iron silicon differential mode sheet and the common mode magnetic core 11, superior differential mode filtering performance can be effectively obtained without changing the overall volume of the magnetic core, replacing the role of the X capacitor, and enabling the filter of the utility model to be suitable for automotive electrical appliances such as motor controllers.

[0036] In some embodiments, the input end of the copper busbar assembly 20 passes through the gap between the common mode core 11 and the differential mode sheet 12, so that the internal space of the filter is fully utilized and the main body of the copper busbar assembly 20 is conveniently wound around the common mode core 11 and the differential mode sheet 12; in addition, the output end 20' of the copper busbar assembly 20 is led out to facilitate connection with vehicle electrical appliances.

[0037] In some embodiments, a plastic package 22 is disposed at the input end of the copper busbar assembly 20 , and the plastic package 22 clamps the integrated magnetic core 10 .

[0038] Figure 4 The equivalent circuit of the filter in the embodiment of the utility model is shown; Figures 1 to 4 As shown, in some embodiments, the copper bar assembly 20 includes a positive copper bar 20a and a negative copper bar 20b; the bodies of the positive copper bar 20a and the negative copper bar 20b are respectively wound on the common mode magnetic core 11 to form a common mode inductor CMC; the bodies of the positive copper bar 20a and / or the negative copper bar 20b are also wound on the corresponding differential mode sheets 12 to form a differential mode inductor DMC, wherein the number of differential mode sheets 12 is less than or equal to the number of copper bars in the copper bar assembly 20.

[0039] In this embodiment, it is illustrated that differential mode inductors DMC are provided in the circuits where the positive copper bar 20a and the negative copper bar 20b are located, but this is not limited to this; in some embodiments, the differential mode inductors DMC may also be provided only in the circuits where the positive copper bar 20a or the negative copper bar 20b is located.

[0040] In this embodiment, the filter circuit of the filter formed is: the input end of the positive copper bar 20a and the negative copper bar 20b → common mode inductor CMC → differential mode inductor DMC → output ends 20a' and 20b' of the positive copper bar 20a and the negative copper bar 20b. The current output from the output ends 20a' and 20b' is a pure current that has been filtered by common mode and differential mode, and can drive the vehicle electrical appliances to operate stably.

[0041] Continue to combine Figures 1 to 4 As shown, in some embodiments, the copper busbar assembly 20 also includes a charging copper busbar 20c; the body of the charging copper busbar 20c is wound on the common mode magnetic core 11, and forms a common mode inductor CMC with the negative copper busbar 20b wound on the common mode magnetic core 11; the body of the charging copper busbar 20c is also wound on the corresponding differential mode sheet 12 to form a differential mode inductor DMC.

[0042] The charging copper bus 20c is used for on-board charging. The current output from the output end 20c' of the charging copper bus 20c is also a pure current that has been filtered by common mode and differential mode, and can achieve stable on-board charging.

[0043] In some embodiments, the integrated magnetic core 10 includes two; the filter is formed from the input end of the copper busbar assembly 20, through the common mode inductor CMC and the differential mode inductor DMC of the first integrated magnetic core 10 and the common mode inductor CMC and the differential mode inductor DMC of the second integrated magnetic core 10, to the output end 20' of the copper busbar assembly 20. Using two integrated magnetic cores 10 can achieve a more effective filtering effect.

[0044] In some embodiments, the filter further includes: a Y capacitor 40 connected in parallel between the input end of the copper busbar assembly 20 and the ground end of the filter. In this way, common mode interference can be further eliminated.

[0045] The present utility model also provides a motor controller, which is equipped with the filter described in any of the above embodiments and has the following advantages:

[0046] By inserting the differential mode sheet 12 into the common mode magnetic core 11 to form an integrated magnetic core 10, the differential mode sheet 12 and a part of the magnetic circuit of the common mode magnetic core 11 form a differential mode magnetic core, and the differential mode filtering performance is achieved without increasing the volume of the magnetic ring, so as to replace the X capacitor in the filter, reduce the volume and design difficulty of the filter, and thus simplify the structure and design of the motor controller;

[0047] The differential mode chip 12 may be an iron silicon differential mode chip, which has strong magnetic properties and low iron loss, and is suitable for high-frequency electrical equipment such as motor controllers;

[0048] The first protective shell 31 covering the integrated magnetic core 10 and the second protective shell 32 covering the lead-out portion of the copper busbar assembly 20 are designed as an integrated whole, which can reduce the dispensing and assembly processes, reduce the amount of glue, and reduce the number of molds, thereby simplifying the assembly and cost of the motor controller.

[0049] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A filter, characterized in that: include: An integrated magnetic core comprises an annular common-mode magnetic core and a differential-mode sheet inserted in the common-mode magnetic core, wherein the differential-mode sheet and a part of the magnetic circuit of the common-mode magnetic core form a differential-mode magnetic core; A copper busbar assembly, the body of which is wound around the integrated magnetic core; The integrated protective shell comprises a first protective shell covering the integrated magnetic core and a second protective shell covering the lead-out portion of the copper busbar assembly, wherein the first protective shell and the second protective shell are integrally formed.

2. The filter according to claim 1, characterized in that The differential mode chip is an iron silicon differential mode chip.

3. The filter according to claim 1, characterized in that The input end of the copper busbar assembly passes through the gap between the common mode magnetic core and the differential mode sheet, and the output end of the copper busbar assembly is led out.

4. The filter according to claim 3, characterized in that The input end of the copper busbar assembly is provided with a plastic package, and the plastic package clamps the integrated magnetic core.

5. The filter according to claim 1, characterized in that The copper bar assembly comprises a positive copper bar and a negative copper bar; The bodies of the positive copper bar and the negative copper bar are respectively wound around the common mode magnetic core to form a common mode inductor; The main bodies of the positive copper bar and / or the negative copper bar are also wound around corresponding differential mode sheets to form differential mode inductors, wherein the number of the differential mode sheets is less than or equal to the number of copper bars in the copper bar assembly.

6. The filter according to claim 5, characterized in that The copper busbar assembly also includes a charging copper busbar; The main body of the charging copper busbar is wound on the common mode magnetic core, and forms a common mode inductor with the negative copper busbar wound on the common mode magnetic core; The main body of the charging copper busbar is also wound around the corresponding differential mode sheet to form a differential mode inductor.

7. The filter according to claim 5 or 6, characterized in that The filter forms a filtering circuit from the input end of the copper busbar assembly, sequentially through the common mode inductor and the differential mode inductor, to the output end of the copper busbar assembly.

8. The filter according to claim 7, characterized in that The integrated magnetic core includes two; The filter forms a filtering circuit from the input end of the copper busbar assembly, sequentially through the common mode inductance and differential mode inductance of the first integrated magnetic core and the common mode inductance and differential mode inductance of the second integrated magnetic core, to the output end of the copper busbar assembly.

9. The filter according to claim 1, characterized in that Also includes: The Y capacitor is connected in parallel between the input end of the copper busbar assembly and the grounding end of the filter.

10. A motor controller, characterized in that: The motor controller is equipped with a filter as claimed in any one of claims 1-9.

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