CN219018707U - Structure of integrated motor controller high-voltage direct-current EMC module - Google Patents

Abstract

The utility model discloses a structure of an integrated motor controller high-voltage direct-current EMC module, which comprises a motor controller and a motor controller, wherein the motor controller is used for controlling a motor; the EMC filter assembly comprises a differential mode magnetic ring, a capacitor plate, an injection molding integrated shell, a ferrite magnetic ring, a nanocrystalline magnetic ring and an electricity taking elastic sheet; the EMC filter component is arranged at a direct current input port of the motor controller. According to the utility model, on the premise of reasonable design of the capacitance values of the X and Y capacitors and the inductance and impedance of the common-mode magnetic ring and the differential-mode magnetic ring, the two-stage filtering is separated to be powered on by optimizing the structural arrangement of the differential-mode and common-mode two-stage filtering, and the two-stage filtering is separated to be grounded, so that the mutual crosstalk between the two stages is avoided, the clutter in the system is reduced, and the stability of the filtering module is further improved.

Description

Structure of integrated motor controller high-voltage direct-current EMC module

Technical Field

The utility model relates to the technical field of EMC modules, in particular to a structure of an integrated motor controller high-voltage direct-current EMC module.

Background

As new energy automobiles are configured with more and more vehicle-mounted electronic products, the probability of electromagnetic interference of the whole automobile is increased, and the method is particularly suitable for electric drive system products. The high-voltage direct-current side bus terminal of the motor controller is used as an interface between the electric control system and the external connection, and is connected with the shielding cable, but high-frequency current is generated, so that radiation in high frequency is caused, and even components are damaged under extreme conditions; it is also possible to interfere with coupling to the vehicle low pressure system. Therefore, the EMC module occupies very important positions in terms of improving the reliability of products and user experience; the power supply system can inhibit voltage fluctuation of a power receiving end of the electric drive system, reduce line power consumption loss, eliminate mutual interference of dense sources, improve stability of signal transmission and the like, and the module enables the level of parts of the electric drive system under the working condition of the whole vehicle environment through internal filtering optimization design.

EMC development has become a trend in the industry at present, especially for high voltage module EMC designs. Whether the Y capacitor grounding design is added in the film capacitor or the laminated busbar design is adopted, the structure is simple, the EMC module of the motor controller internal design in the prior art is limited by the arrangement space of original devices in the whole vehicle and the control mechanism in the design process, the common mode and differential mode two-stage filtering units are shared, the power taking and grounding conducting plates are used, mutual crosstalk between two stages is caused, outgoing line clutter is generated, the EMC performance is reduced, and the problem is solved by arranging the structure of the integrated motor controller high-voltage direct-current EMC module.

Disclosure of Invention

Therefore, the utility model aims to provide a structure of the high-voltage direct-current EMC module of the integrated motor controller, and under the premise of reasonable design of capacitance values of X and Y capacitors, inductance and impedance of a common-mode magnetic ring and a differential-mode magnetic ring, the two-stage filtering is separated to take electricity by optimizing structural arrangement of the differential-mode filtering and the common-mode filtering, and the two-stage filtering is separately grounded, so that mutual crosstalk between the two stages is avoided, clutter in the system is reduced, and the stability of the filtering module is further improved.

In order to solve the technical problems, the utility model provides a structure of an integrated motor controller high-voltage direct-current EMC module, which comprises a motor controller and an EMC filter assembly,

the motor controller is used for controlling the motor;

the EMC filter assembly comprises a differential mode magnetic ring, a capacitor plate, an injection molding integrated shell, a ferrite magnetic ring, a nanocrystalline magnetic ring and an electricity taking elastic sheet;

the EMC filter component is arranged at a direct current input port of the motor controller.

Furthermore, the EMC filter component is contacted with the shell through the metal conducting plate, so that the shielding and grounding effects are achieved.

Furthermore, the whole capacitor plate in the EMC filter assembly is divided into two filter loops, namely a primary filter circuit and a secondary filter circuit;

the first-stage filter circuit is composed of six second Y capacitors, a third Y capacitor and a fourth Y capacitor;

the secondary filter circuit is composed of two first Y capacitors and an X capacitor.

Further, the utility model also comprises a grounding spring plate,

the grounding spring plate is inserted into a PVB groove in the capacitor plate and welded by soldering.

Furthermore, the electricity taking spring plate is composed of a metal spring plate and a copper bracket, and the metal spring plate and the copper bracket are welded through resistance welding.

Further, the shielding conductive sheet and the fixing Kong Gangtao are arranged;

the shielding conducting plate is manufactured by processing copper foil with high magnetic permeability, and the whole EMC module is integrally riveted through a fixed hole steel sleeve.

Compared with the prior art, the utility model has the following beneficial effects: on the premise of reasonable design of capacitance values of X and Y capacitors and inductance and impedance of a common-mode magnetic ring and a differential-mode magnetic ring, through structural arrangement of optimizing differential-mode and common-mode two-stage filtering, the two-stage filtering is separated to take electricity, the two-stage filtering is separately grounded, mutual crosstalk between the two stages is avoided, clutter inside a system is reduced, and stability of a filtering module is further improved; EMC crosstalk between X and Y electric capacity and the busbar electric capacity of the inside integrated of scheme subassembly can be effectively avoided, optimize shielding performance, positive negative electrode conductive copper bar, shielding conducting strip and casing are moulded plastics into an organic whole, reduce the product equipment, first Y electric capacity, second Y electric capacity, third Y electric capacity, fourth Y electric capacity's combination each other, can freely match different combinations, compatible different project operating modes use, the effectual interference that restraines and attenuates differential mode and common mode signal, ferrite magnetic ring is the nanocrystalline material of ring type structure, high magnetic permeability has, high saturation magnetic induction intensity, low loss's advantage, metal shell fragment and copper support both resistance welding are integrative, reserve the shell fragment under the prerequisite that guaranteeing shell fragment and power cable terminal contact are good has elastic deformation, guarantee can dismantle repeatedly and use.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following detailed description of the embodiments of the present utility model will be given with reference to the accompanying drawings, which are to be understood as merely some embodiments of the present utility model, and from which other drawings can be obtained by those skilled in the art without inventive faculty. Wherein:

FIG. 1 is a partial assembly view of a motor controller according to an embodiment of the present utility model;

FIG. 2 is a schematic illustration of an internal assembly according to an embodiment of the present utility model;

FIG. 3 is a schematic illustration of an internal assembly according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a capacitive plate according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a capacitive plate according to an embodiment of the present utility model;

FIG. 6 is a schematic structural diagram of an electric power taking spring plate according to an embodiment of the present utility model;

fig. 7 is a schematic structural diagram of a shielding conductive sheet according to an embodiment of the present utility model;

in the figure, 1, a motor controller; 2. a differential mode magnetic ring; 3. a capacitive plate; 4. injection molding an integral shell; 5. a ferrite bead; 6. a nanocrystalline magnetic ring; 7. taking an electric spring plate; 9. a first Y capacitance; 10. an X capacitor; 11. a second Y capacitor; 12. a third Y capacitance; 13. a fourth Y capacitance; 14. a grounding spring plate; 15. a metal spring plate; 16. a copper stand; 17. shielding the conductive sheet; 18. and fixing Kong Gangtao.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

In the following detailed description of the embodiments of the present utility model, the cross-sectional view of the device structure is not partially enlarged to a general scale for the convenience of description, and the schematic is merely an example, which should not limit the scope of the present utility model. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

The utility model provides a structure of an integrated motor controller high-voltage direct-current EMC module, which is characterized in that on the premise of reasonable design of the capacitance of an X capacitor and a Y capacitor and the inductance and impedance of a common-mode magnetic ring and a differential-mode magnetic ring, the two-stage filtering is separated to take electricity, the two-stage filtering is separately grounded, so that the mutual crosstalk between the two stages is avoided, clutter in a system is reduced, and the stability of a filtering module is further improved.

FIGS. 1-5 are schematic diagrams showing the overall structure of an embodiment of a high voltage DC EMC module of an integrated motor controller according to the present utility model;

referring to fig. 1-5, an embodiment of the present utility model provides a structure of an integrated motor controller high voltage dc EMC module, which includes a motor controller 1 and an EMC filter assembly,

a motor controller 1 for motor control;

the EMC filter assembly comprises a differential mode magnetic ring 2, a capacitor plate 3, an injection molding integrated shell 4, a ferrite magnetic ring 5, a nanocrystalline magnetic ring 6 and an electricity-taking elastic sheet 7;

the EMC filter assembly is arranged at the dc input port of the motor controller 1.

Specifically, the capacitor plate 3 is placed in the shell, and then the electricity-taking spring plate 7 is inserted into the groove of the shell; welding pins of the electric spring 7, welding pins of the grounding conducting strip with the PCB firmly, pouring glue from a glue injection hole of the PCB for fixation, respectively mounting a common-mode magnetic ring and a differential-mode magnetic ring 2 at two ends after glue solidification, and then pouring glue for fixation;

the whole capacitive plate 3 in the EMC filter assembly is divided into two filter circuits, namely a primary filter circuit and a secondary filter circuit;

the first-stage filter circuit is composed of six second Y capacitors 11, a third Y capacitor 12 and a fourth Y capacitor 13; the secondary filter circuit is composed of two first Y capacitors 9 and an X capacitor 10;

the electricity taking spring plate 7 is composed of a metal spring plate 15 and a copper bracket 16, and the metal spring plate 15 and the copper bracket 16 are welded through resistance welding.

The structure also comprises a shielding conducting plate 17 and a fixed hole steel sleeve 18;

the shielding conductive sheet 17 is processed by copper foil with high magnetic permeability, and the whole EMC module is riveted into a whole through a fixed hole steel sleeve 18;

specifically, the shielding conducting strip 17 is processed by copper foil with high magnetic permeability, the product and the fixed hole steel sleeve 18 are riveted into a whole, pins of the shielding conducting strip 17 are welded with the grounding copper foil on the PCB, shielding and grounding loops are formed around, and the integration level is high; EMC crosstalk between the X and Y capacitors integrated in the scheme component and the bus capacitor can be effectively avoided, shielding performance is optimized, the anode and cathode conductive copper bars and the shielding conductive sheet 17 are integrally molded with the shell, and product assembly is reduced.

The first Y capacitor 9, the second Y capacitor 11, the third Y capacitor 12 and the fourth Y capacitor 13 can be combined with each other freely, different combinations can be matched, different project working conditions are compatible, interference of differential mode and common mode signals is effectively restrained and attenuated, the ferrite magnetic ring 5 is made of nanocrystalline materials of a ring-shaped structure, the ferrite magnetic ring has the advantages of high magnetic permeability, high saturation magnetic induction intensity and low loss, the metal elastic sheet 15 and the copper support 16 are welded into a whole through resistance welding, and under the premise that the elastic sheet and a power cable terminal are well contacted, the elastic sheet is reserved to have an elastic deformation space, and repeated disassembly and assembly can be guaranteed.

Although the utility model has been described hereinabove with reference to embodiments, various modifications thereof may be made and equivalents may be substituted for elements thereof without departing from the scope of the utility model. In particular, the features of the disclosed embodiments may be combined with each other in any manner as long as there is no structural conflict, and the exhaustive description of these combinations is not given in this specification merely for the sake of omitting the descriptions and saving resources. Therefore, it is intended that the utility model not be limited to the particular embodiment disclosed, but that the utility model will include all embodiments falling within the scope of the appended claims.

Claims (6)

1. The structure of the integrated motor controller high-voltage direct-current EMC module is characterized by comprising a motor controller (1) and an EMC filter assembly,

the motor controller (1) is used for controlling a motor;

the EMC filter assembly comprises a differential mode magnetic ring (2), a capacitor plate (3), an injection molding integrated shell (4), a ferrite magnetic ring (5), a nanocrystalline magnetic ring (6) and an electricity taking elastic sheet (7);

the EMC filter component is arranged at a direct current input port of the motor controller (1).

2. The structure of an integrated motor controller HVDC EMC module as recited in claim 1, wherein,

the EMC filter component is contacted with the shell through the metal conducting strip, so that the shielding and grounding effects are achieved.

3. The structure of an integrated motor controller high voltage direct current EMC module as recited in claim 2 wherein,

the capacitive plate (3) in the EMC filter assembly is integrally divided into two filter loops, namely a primary filter circuit and a secondary filter circuit;

the primary filter circuit is composed of six second Y capacitors (11), a third Y capacitor (12) and a fourth Y capacitor (13);

the secondary filter circuit is composed of two first Y capacitors (9) and one X capacitor (10).

4. The structure of an integrated motor controller high voltage direct current EMC module according to claim 3 further comprising a grounding spring (14),

the grounding spring piece (14) is inserted into a PVB groove in the capacitor plate (3) and welded by soldering.

5. The structure of an integrated motor controller HVDC EMC module as recited in claim 4, wherein,

the electricity taking spring piece (7) is composed of a metal spring piece (15) and a copper bracket (16), and the metal spring piece (15) and the copper bracket (16) are welded through resistance welding.

6. The structure of an integrated motor controller high voltage direct current EMC module according to claim 5, further comprising a shielding conductive sheet (17) and a fixture Kong Gangtao (18);

the shielding conductive sheet (17) is made of copper foil with high magnetic permeability, and the whole EMC module is press-riveted into a whole by fixing Kong Gangtao (18).

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