CN216564932U - Filtering structure of controller - Google Patents
Filtering structure of controller Download PDFInfo
- Publication number
- CN216564932U CN216564932U CN202123145403.XU CN202123145403U CN216564932U CN 216564932 U CN216564932 U CN 216564932U CN 202123145403 U CN202123145403 U CN 202123145403U CN 216564932 U CN216564932 U CN 216564932U
- Authority
- CN
- China
- Prior art keywords
- capacitor
- electrically connected
- voltage
- filtering module
- low
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Filters And Equalizers (AREA)
Abstract
The utility model discloses a filter structure of a controller, which comprises: the low-voltage filtering unit comprises a first-stage filtering module, a second-stage filtering module, a first electrolytic capacitor and a second electrolytic capacitor, wherein the first electrolytic capacitor is electrically connected with the first-stage filtering module and the second-stage filtering module; the first-stage filtering module comprises a first patch capacitor, a first common-mode inductor and a second patch capacitor which are connected in parallel, and the second-stage filtering module comprises a third patch capacitor, a differential-mode inductor and a fourth patch capacitor which are connected in parallel; and the high-voltage filtering unit is arranged on one side of the low-voltage filtering unit and comprises a second common-mode inductor and a fifth electrolytic capacitor which are connected in parallel. By combining the common-mode inductor and the differential-mode inductor, low-frequency signals and high-frequency signals can be filtered simultaneously, so that external radiation caused by internal interference is reduced; the high-voltage end adopts common-mode filtering and special treatment, so that external radiation caused by switching frequency can be effectively reduced, and the Y capacitor is close to the shell to be beneficial to shielding interference.
Description
Technical Field
The utility model relates to the technical field of filtering of controllers, in particular to a filtering structure of a controller.
Background
At present, people pay more and more attention to the electromagnetic compatibility problem of electronic equipment, and particularly, the problem of conducted emission and radiation emission of the electronic equipment directly affects the health of people, so the EMC requirement on the electronic equipment is also more and more severe and more standard. EMC interference sources can be divided into a differential mode interference mode and a common mode interference mode, and in practical applications, particularly for power supply products, common mode interference influences are mainly caused in most cases, so that common mode inductors are often used in filter circuits to filter high-frequency signals, but low-frequency signals cannot be filtered, and external radiation of internal interference cannot be reduced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the embodiment of the utility model provides a filter structure of a controller, wherein a low-voltage end of the filter structure is added with a primary filter structure to form secondary filtering, a common-mode inductor and a differential-mode inductor are combined for use, so that a low-frequency signal and a high-frequency signal can be filtered simultaneously, and a second electrolytic capacitor and a ground Y capacitor are added to reduce external radiation of internal interference; the high-voltage end adopts common mode filtering and special treatment, common mode inductance is added, external radiation caused by switching frequency can be effectively reduced, a complete stratum is adopted, the ground on two sides of the common mode inductance is separated, and the Y capacitor is close to the ground of the shell, so that interference shielding is facilitated.
The embodiment of the application discloses controller filtering structure includes:
the low-voltage filtering unit comprises a first-stage filtering module, a second-stage filtering module, a first electrolytic capacitor and a second electrolytic capacitor, wherein the first electrolytic capacitor is electrically connected with the first-stage filtering module and the second-stage filtering module, and the second electrolytic capacitor is electrically connected with the second-stage filtering module;
the first-stage filtering module comprises a first patch capacitor, a first common-mode inductor and a second patch capacitor which are connected in parallel, the second-stage filtering module comprises a third patch capacitor, a differential-mode inductor and a fourth patch capacitor which are connected in parallel, and two ends of the fourth patch capacitor are respectively connected with a first Y capacitor and a second Y capacitor in series so as to reduce radiation of internal interference to the outside;
the high-voltage filter unit is arranged on one side of the low-voltage filter unit and comprises a second common-mode inductor and a fifth electrolytic capacitor which are connected in parallel, and two ends of the fifth electrolytic capacitor are respectively connected with a third Y capacitor and a fourth Y capacitor in series.
Furthermore, one side of the low-voltage filtering unit is electrically connected with a low-voltage power supply, and the voltage of the low-voltage power supply is 12V.
Furthermore, the other side of the low-voltage filtering unit is electrically connected with an isolated DC-DC.
Furthermore, the isolated DC-DC is respectively electrically connected with a single chip microcomputer and a driving circuit, and the single chip microcomputer is electrically connected with the driving circuit.
Furthermore, the driving circuit is electrically connected with a three-phase inverter circuit, and the three-phase inverter circuit is electrically connected with the high-voltage filtering unit.
Furthermore, the other side of the three-phase inverter circuit is also electrically connected with a motor.
Furthermore, the high-voltage filter unit further comprises a copper bar, and the copper bar is connected with a positive input end and a negative input end respectively.
Furthermore, the high-voltage filtering unit is electrically connected with a high-voltage power supply.
Further, the first common mode inductor is used for filtering high-frequency signals above 1MHZ, and the differential mode inductor is used for filtering low-frequency signals below 1 MHZ.
The utility model has the following beneficial effects:
1. according to the low-voltage end, a primary filtering structure is added to be secondary filtering, a common mode inductor and a differential mode inductor are combined for use, low-frequency signals and high-frequency signals can be filtered simultaneously, and a second electrolytic capacitor and a ground Y capacitor are added to reduce external radiation of internal interference; the high-voltage end adopts common mode filtering and special treatment, common mode inductance is added, external radiation caused by switching frequency can be effectively reduced, a complete stratum is adopted, the ground on two sides of the common mode inductance is separated, and the Y capacitor is close to the ground of the shell, so that interference shielding is facilitated.
2. The low-voltage power supply, the high-voltage power supply, the isolated DC-DC, the single chip microcomputer, the driving circuit, the three-phase inverter circuit and the motor are respectively close to respective areas so as to reduce the length of a line and reduce coupling and mutual interference.
In order to make the aforementioned and other objects, features and advantages of the utility model comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of the operation of a low-voltage filter unit in an embodiment of the present invention;
fig. 2 is a schematic diagram of the operation of the high-voltage filter unit in the embodiment of the utility model.
Reference numerals of the above figures: 10. a first stage filtering module; 11. a first chip capacitor; 12. a first common mode inductor; 13. a second chip capacitor; 20. a first electrolytic capacitor; 30. a second stage filtering module; 31. a third chip capacitor; 32. a differential mode inductance; 33. a fourth chip capacitor; 34. a first Y capacitor; 35. a second Y capacitor; 40. a second electrolytic capacitor; 50. a high voltage filtering unit; 51. a second common mode inductor; 52. a fifth electrolytic capacitor; 53. a third Y capacitor; 54. and a fourth Y capacitor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.
According to the filter structure of the controller, the low-voltage end of the filter structure is provided with the primary filter structure added with the secondary filter structure, the common-mode inductor and the differential-mode inductor are combined for use, low-frequency signals and high-frequency signals can be filtered simultaneously, and the second electrolytic capacitor and the grounding Y capacitor are added to reduce external radiation of internal interference; the high-voltage end adopts common mode filtering and special treatment, common mode inductance is added, external radiation caused by switching frequency can be effectively reduced, a complete stratum is adopted, the ground on two sides of the common mode inductance is separated, and the Y capacitor is close to the ground of the shell, so that interference shielding is facilitated.
The present invention will be described in detail with reference to the accompanying drawings 1-2 and examples.
This embodiment the controller filtering structure includes:
the low-voltage filtering unit comprises a first-stage filtering module 10, a second-stage filtering module 30, a first electrolytic capacitor 20 electrically connected with the first-stage filtering module 10 and the second-stage filtering module 30, and a second electrolytic capacitor 40 electrically connected with the second-stage filtering module 30;
the first-stage filtering module 10 includes a first patch capacitor 11, a first common-mode inductor 12 and a second patch capacitor 13 which are connected in parallel, the second-stage filtering module 30 includes a third patch capacitor 31, a differential-mode inductor 32 and a fourth patch capacitor 33 which are connected in parallel, and two ends of the fourth patch capacitor 33 are respectively connected in series with a first Y capacitor 34 and a second Y capacitor 35 to reduce external radiation of internal interference;
the high-voltage filter unit 50 is arranged on one side of the low-voltage filter unit, the high-voltage filter unit 50 comprises a second common-mode inductor 51 and a fifth electrolytic capacitor 52 which are connected in parallel, and two ends of the fifth electrolytic capacitor 52 are respectively connected in series with a third Y capacitor 53 and a fourth Y capacitor 54.
With reference to fig. 1 and fig. 2, in this embodiment, the filter structure of the controller includes: a low voltage filter unit and a high voltage filter unit 50. The low-voltage filtering unit comprises a first-stage filtering module 10, a second-stage filtering module 30, a first electrolytic capacitor 20 electrically connected with the first-stage filtering module 10 and the second-stage filtering module 30, and a second electrolytic capacitor 40 electrically connected with the second-stage filtering module 30. The first-stage filtering module 10 includes a first patch capacitor 11, a first common mode inductor 12, and a second patch capacitor 13 connected in parallel. The second-stage filtering module 30 includes a third patch capacitor 31, a differential-mode inductor 32, and a fourth patch capacitor 33 connected in parallel. And two ends of the fourth patch capacitor 33 are respectively connected in series with the first Y capacitor 34 and the second Y capacitor 35 to reduce external radiation of internal interference. The high voltage filter unit 50 is disposed at one side of the low voltage filter unit. The high voltage filtering unit 50 includes a second common mode inductor 51 and a fifth electrolytic capacitor 52 connected in parallel. The two ends of the fifth electrolytic capacitor 52 are respectively connected in series with a third Y capacitor 53 and a fourth Y capacitor 54.
Furthermore, a person skilled in the art can change the number of the low-voltage filter units and the high-voltage filter units 50 according to actual needs, so as to adjust the number of the common mode inductors and the differential mode inductors 32, thereby achieving flexible and adjustable filter structures and functions.
Specifically, in this embodiment, one side of the low voltage filtering unit is electrically connected to a low voltage power supply. The voltage of the low-voltage power supply is 12V.
Specifically, in this embodiment, the other side of the low voltage filtering unit is electrically connected to an isolated DC-DC.
Specifically, in this embodiment, the isolated DC-DC is electrically connected to the single chip and the driving circuit, respectively. The single chip microcomputer is electrically connected with the driving circuit.
Specifically, in this embodiment, the driving circuit is electrically connected to a three-phase inverter circuit. The three-phase inverter circuit is electrically connected to the high-voltage filter unit 50.
Specifically, in this embodiment, the other side of the three-phase inverter circuit is further electrically connected to the motor.
Specifically, in this embodiment, the high voltage filtering unit 50 further includes a copper bar. And the copper bar is respectively connected with a positive input end and a negative input end.
Specifically, in the present embodiment, the high voltage filtering unit 50 is electrically connected to a high voltage power supply.
Specifically, in the present embodiment, the first common mode inductor 12 is used for filtering high frequency signals above 1 MHZ. The differential mode inductor 32 is used for filtering low frequency signals below 1 MHZ. By combining the common mode inductor with the differential mode inductor 32, the filter structure can filter common mode interference and differential mode interference at the same time.
The low-voltage power supply, the high-voltage power supply, the isolated DC-DC, the single chip microcomputer, the driving circuit, the three-phase inverter circuit and the motor are respectively close to respective areas so as to reduce the length of a line and reduce coupling and mutual interference.
According to the low-voltage end, a primary filtering structure is added to be secondary filtering, a common mode inductor and a differential mode inductor are combined for use, low-frequency signals and high-frequency signals can be filtered simultaneously, and a second electrolytic capacitor and a ground Y capacitor are added to reduce external radiation of internal interference; the high-voltage end adopts common mode filtering and special treatment, common mode inductance is added, external radiation caused by switching frequency can be effectively reduced, a complete stratum is adopted, the ground on two sides of the common mode inductance is separated, and the Y capacitor is close to the ground of the shell, so that interference shielding is facilitated.
The principle and the implementation mode of the utility model are explained by applying specific embodiments in the utility model, and the description of the embodiments is only used for helping to understand the technical scheme and the core idea of the utility model; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (9)
1. A controller filtering structure, comprising:
the low-voltage filtering unit comprises a first-stage filtering module, a second-stage filtering module, a first electrolytic capacitor and a second electrolytic capacitor, wherein the first electrolytic capacitor is electrically connected with the first-stage filtering module and the second-stage filtering module, and the second electrolytic capacitor is electrically connected with the second-stage filtering module;
the first-stage filtering module comprises a first patch capacitor, a first common-mode inductor and a second patch capacitor which are connected in parallel, the second-stage filtering module comprises a third patch capacitor, a differential-mode inductor and a fourth patch capacitor which are connected in parallel, and two ends of the fourth patch capacitor are respectively connected with a first Y capacitor and a second Y capacitor in series so as to reduce radiation of internal interference to the outside;
the high-voltage filter unit is arranged on one side of the low-voltage filter unit and comprises a second common-mode inductor and a fifth electrolytic capacitor which are connected in parallel, and two ends of the fifth electrolytic capacitor are respectively connected with a third Y capacitor and a fourth Y capacitor in series.
2. The filter structure of the controller according to claim 1, wherein one side of the low voltage filter unit is electrically connected to a low voltage power supply, and the voltage of the low voltage power supply is 12V.
3. The filter structure of the controller according to claim 1, wherein the other side of the low voltage filter unit is electrically connected with an isolated DC-DC.
4. The filter structure of claim 3, wherein the isolated DC-DC is electrically connected to a single chip and a driving circuit, respectively, and the single chip is electrically connected to the driving circuit.
5. The filter structure of claim 4, wherein the driving circuit is electrically connected to a three-phase inverter circuit, and the three-phase inverter circuit is electrically connected to the high-voltage filter unit.
6. The filter structure of the controller according to claim 5, wherein the other side of the three-phase inverter circuit is further electrically connected to a motor.
7. The filter structure of claim 1, wherein the high voltage filter unit further comprises a copper bar, and a positive input terminal and a negative input terminal are respectively connected to the copper bar.
8. The filter structure of the controller according to claim 1, wherein the high voltage filter unit is electrically connected to a high voltage power supply.
9. The controller filtering structure according to claim 1, wherein the first common mode inductor is used for filtering high frequency signals above 1MHZ, and the differential mode inductor is used for filtering low frequency signals below 1 MHZ.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123145403.XU CN216564932U (en) | 2021-12-15 | 2021-12-15 | Filtering structure of controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123145403.XU CN216564932U (en) | 2021-12-15 | 2021-12-15 | Filtering structure of controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216564932U true CN216564932U (en) | 2022-05-17 |
Family
ID=81542972
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123145403.XU Active CN216564932U (en) | 2021-12-15 | 2021-12-15 | Filtering structure of controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216564932U (en) |
-
2021
- 2021-12-15 CN CN202123145403.XU patent/CN216564932U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203039568U (en) | Power supply harmonic wave and radio frequency interference suppressor | |
| WO2016180019A1 (en) | Auxiliary converter and vehicle | |
| CN211480930U (en) | Hybrid power filter with anti-electromagnetic interference function for electronic product | |
| CN203554276U (en) | Output filter circuit of sine wave vehicular inverter, and sine wave vehicular inverter | |
| CN101272086B (en) | EMC equipment | |
| CN208507474U (en) | A kind of metallic film capacitor of reduction system EMC | |
| CN209233717U (en) | A kind of EMC filter circuit | |
| CN216564932U (en) | Filtering structure of controller | |
| CN105356740A (en) | Electric energy converter with electromagnetic interference suppression structure | |
| CN215734034U (en) | Electromagnetic compatibility filter circuit and voltage reduction and boosting device | |
| CN217508593U (en) | EMC filter circuit for power assembly motor controller | |
| CN207819086U (en) | A kind of connector assembly of removable pulse current | |
| CN212992292U (en) | Filter circuit for high-voltage direct current input | |
| CN115149515A (en) | Low-voltage power supply filter circuit and motor controller | |
| CN213402820U (en) | EMI multistage filter circuit for electric vehicle motor controller | |
| CN112260527A (en) | Power supply filter circuit and power supply filter device | |
| CN203761256U (en) | Three-level power supply noise dedicated filter | |
| CN207720098U (en) | A kind of USB interface anti-jamming circuit | |
| CN207099040U (en) | A kind of power-supply filter | |
| CN203398984U (en) | Filtering structure reducing ripples of power supply | |
| CN219018707U (en) | Structure of integrated motor controller high-voltage direct-current EMC module | |
| CN213072481U (en) | Integrated bridge rectifier full-chip circuit | |
| CN216721289U (en) | Motor EMC filter circuit, filter structure, motor and vehicle | |
| CN214228115U (en) | Power supply filter circuit and power supply filter device | |
| CN204886690U (en) | EMC power isolation filter module |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |