CN109600035A - A kind of power module - Google Patents
A kind of power module Download PDFInfo
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- CN109600035A CN109600035A CN201811560735.4A CN201811560735A CN109600035A CN 109600035 A CN109600035 A CN 109600035A CN 201811560735 A CN201811560735 A CN 201811560735A CN 109600035 A CN109600035 A CN 109600035A
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- filter circuit
- capacitance
- power module
- converter
- mode inductance
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/44—Circuits or arrangements for compensating for electromagnetic interference in converters or inverters
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- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
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Abstract
The invention discloses a kind of power modules, including DC converter, further includes: connected level-one filter circuit and secondary filter circuit, wherein the level-one filter circuit is used to carry out common mode filtering to input signal and differential mode filters；The secondary filter circuit is connected with the DC converter, and the signal for exporting to the level-one filter circuit carries out common mode filtering.It is able to suppress power module EMI interference through the embodiment of the present invention, the common mode interference and DM EMI of power module is effectively reduced.
Description
Technical field
The present invention relates to electronics field, espespecially a kind of power module.
Background technique
In the design of Current electronic product, EMC (Electro Magnetic Compatibility, Electro Magnetic Compatibility)
The important indicator that must be paid close attention to, EMC include EMI (Electro Magnetic Interference, electromagnetic interference) and
EMS (Electromagnetic Susceptibility, electromagnetic susceptibility).Design for electronic product needs to reduce certainly
The EMI of body, and improve EMS.
Power module can directly mount power supply unit on a printed circuit as one kind, in single board design process
In, it needs to reduce its EMI, reduces the interference to other electromagnetic devices, guarantee the EMC performance of product entirety.
In the related technology, for the processing mode for inhibiting power module EMI to interfere, only with single common mode filtering electricity
Road or differential mode filter circuit complete common mode filtering or differential mode filtering.Its filtering mode is single, and it is dry can not to effectively filter out common mode
It disturbs and DM EMI, the rejection ability interfered EMI is limited.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of power modules, and it is dry can to reduce power module EMI
It disturbs.
In order to reach the object of the invention, the present invention provides a kind of power modules, including DC converter, further includes: phase
Level-one filter circuit and secondary filter circuit even, wherein
The level-one filter circuit is used to carry out common mode filtering to input signal and differential mode filters；
The secondary filter circuit is connected with the DC converter, the signal for exporting to the level-one filter circuit
Carry out common mode filtering.
Optionally, the power module further include: surge restraint circuit,
The surge restraint circuit is connected with the level-one filter circuit, for inhibiting the surge of the input signal.
Optionally, in the surge restraint circuit, one end of FU1 and the electrode input end of the power module are insured in front end
It is connected, the other end of front end insurance FU1 is connected with varistor RV1, varistor RV2 and varistor RV3 respectively；Pressure-sensitive electricity
The one end for hindering RV1 is connected with front end insurance FU1, and the cathode of the other end of varistor RV1 and the power module inputs
End is connected；One end of varistor RV2 is connected with the negative input of the power module, other end ground connection；Varistor RV3
One end and the front end insurance FU1 be connected, the other end is grounded.
Optionally, in the level-one filter circuit, X capacitor CX1 is in parallel with the varistor RV1；Common mode inductance L1's
One end of first coil is connected with one end of X capacitor CX1, the other end and the differential mode inductance L2 phase of the first coil of common mode inductance L1
Even；One end of the second coil of common mode inductance L1 and the other end of X capacitor CX1 and the negative input phase of the power module
Even, the other end of the second coil of common mode inductance L1 is connected with differential mode inductance L4；One end of the differential mode inductance L2 with it is described total
The first coil of mould inductance L1 is connected, and the other end of the differential mode inductance L2 is connected with Y capacitance CY1；The differential mode inductance L4's
One end is connected with the second coil of the common mode inductance L1, and the other end of the differential mode inductance L4 is connected with Y capacitance CY2；The Y
One end of capacitor CY1 is connected with the differential mode inductance L2, the other end ground connection of the Y capacitance CY1；One end of the Y capacitance CY2
It is connected with the differential mode inductance L4, the other end ground connection of the Y capacitance CY2.
Optionally, in the secondary filter circuit, one end of the first coil of common mode inductance L3 and the differential mode inductance L2
And the Y capacitance CY1 is connected, the other end and transient suppressor TVS1 and diode of the first coil of the common mode inductance L3
The cathode of D1 is connected；One end of the second coil of common mode inductance L3 is connected with the differential mode inductance L4 and the Y capacitance CY2,
The other end of the second coil of the common mode inductance L3 is grounded；One end of the transient suppressor TVS1 and the cathode of diode D1
It is connected, other end ground connection；The anode of the positive and described DC converter of one end of X capacitor C3 and the diode D1 inputs
End is connected, and the other end of X capacitor C3 is grounded and is connected with the negative input of the DC converter；X capacitor C6 and X electricity
It is in parallel to hold C3.
Optionally, the power module further include: the first input filter circuit,
First input filter circuit respectively with the input terminal of the DC converter and the secondary filter circuit phase
Even, pressure stabilizing and filtering are carried out for the signal to the secondary filter circuit output.
Optionally, in first input filter circuit, the anode of one end of filter capacitor C4 and the DC converter
Input terminal is connected, and the other end of filter capacitor C4 is grounded and is connected with the negative input of the DC converter；Filter capacitor
C5 is in parallel with the filter capacitor C4.
Optionally, the power module further include: the second input filter circuit,
In second input filter circuit, the electrode input end phase of one end of Y capacitance CY4 and the DC converter
Even, the other end ground connection of Y capacitance CY4；One end of Y capacitance CY5 is connected with the negative input of the DC converter, Y capacitance
The other end of CY5 is grounded.
Optionally, the power module further include: output filter circuit,
The output filter circuit is connected with the output end of the DC converter, for the defeated of the DC converter
Signal is filtered out.
Optionally, in the output filter circuit, the both ends of the filter capacitor C10 anode with the DC converter respectively
Output end is connected with cathode output end；One end of filtering Y capacitance CY3 is connected with the cathode output end of the DC converter, filters
The other end of wave Y capacitance CY3 is grounded；One end of filtering Y capacitance CY6 is connected with the cathode output end of the DC converter, filters
The other end of wave Y capacitance CY6 is grounded.
The power module of the embodiment of the present invention, including DC converter, further includes: connected level-one filter circuit and second level
Filter circuit, wherein the level-one filter circuit is used to carry out common mode filtering to input signal and differential mode filters；The second level filter
Wave circuit is connected with the DC converter, and the signal for exporting to the level-one filter circuit carries out common mode filtering.Pass through
The embodiment of the present invention is able to suppress power module EMI interference, and the common mode interference and DM EMI of power module is effectively reduced.
In one embodiment, the power module of the embodiment of the present invention further includes surge restraint circuit, so that power module has
Standby surge voltage rejection ability.
In one embodiment, the power module of the embodiment of the present invention further includes the first input filter circuit, so that power supply mould
Block has to input signal pressure stabilizing ability.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
It obtains it is clear that understand through the implementation of the invention.The objectives and other advantages of the invention can be by specification, right
Specifically noted structure is achieved and obtained in claim and attached drawing.
Detailed description of the invention
Attached drawing is used to provide to further understand technical solution of the present invention, and constitutes part of specification, with this
The embodiment of application technical solution for explaining the present invention together, does not constitute the limitation to technical solution of the present invention.
Fig. 1 is the power module composition schematic diagram of the embodiment of the present invention；
Fig. 2 is the power module composition schematic diagram of another embodiment of the present invention；
Fig. 3 is the power module composition schematic diagram of application example of the present invention.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with attached drawing to the present invention
Embodiment be described in detail.It should be noted that in the absence of conflict, in the embodiment and embodiment in the application
Feature can mutual any combination.
For single common mode filtering circuit or differential mode filter circuit is used, inhibit the ability of EMI interference is limited to ask
Topic, the embodiment of the invention provides use second level common mode filtering and level-one differential mode to filter the power supply for reducing power module EMI and interfering
Module.
As shown in Figure 1, the power module of the embodiment of the present invention, including DC converter 11, further includes: connected first-level filtering
Wave circuit 12 and secondary filter circuit 13, wherein
The level-one filter circuit 12 is used to carry out common mode filtering to input signal and differential mode filters；
The secondary filter circuit 13 is connected with the DC converter 11, for exporting to the level-one filter circuit 12
Signal carry out common mode filtering.
Be able to suppress through the embodiment of the present invention power module EMI interference, be effectively reduced power module common mode interference and
DM EMI.
Wherein, common mode interference refers to the noise jamming of two signal wires respectively over the ground；DM EMI refers to two signal wires
Between noise jamming.Common mode filtering can be interfered with filtering common mode；Differential mode filtering can filter out DM EMI.
Referring to Fig. 2, in one embodiment, power module, further includes: surge restraint circuit 14,
The surge restraint circuit 14 is connected with the level-one filter circuit 12, for inhibiting the wave of the input signal
It gushes.
Surge restraint circuit can inhibit input surge, and referring to Fig. 3, surge restraint circuit is mainly by varistor
RV1, RV2, RV3 and front end insurance FU1 composition, main function are inhibited to input surge voltage.
In the surge restraint circuit, one end of front end insurance FU1 is connected with the electrode input end of the power module, preceding
The other end of end insurance FU1 is connected with varistor RV1, varistor RV2 and varistor RV3 respectively；Varistor RV1's
One end is connected with front end insurance FU1, and the other end of varistor RV1 is connected with the negative input of the power module；
One end of varistor RV2 is connected with the negative input of the power module, other end ground connection；One end of varistor RV3
It is connected with front end insurance FU1, other end ground connection.
Above-mentioned varistor RV1, RV2, RV3 and front end insurance FU1 design parameter are needed according to requiring in professional standard
Surge voltage is selected.
The level-one filter circuit is substantially carried out common mode filtering and differential mode filtering, inhibits to EMI interference.Referring to Fig. 3,
For the level-one filter circuit mainly by common mode inductance L1, differential mode inductance L2 and L4, X capacitor CX1, Y capacitance CY1 and CY2 composition is main
Acting on is to be filtered, and reduces the interference of power supply.
Wherein, common mode inductance is the filter inductance for inhibiting common mode interference；Differential mode inductance is the filtered electrical for inhibiting DM EMI
Sense；X capacitor is to connect to be used to eliminate the safety capacitor of DM EMI at input line both ends；Y capacitance be connect input line and ground wire it
Between, for eliminating the safety capacitor of common mode interference.
In the level-one filter circuit, X capacitor CX1 is in parallel with the varistor RV1；The first coil of common mode inductance L1
One end be connected with one end of X capacitor CX1, the other end of the first coil of common mode inductance L1 is connected with differential mode inductance L2；Common mode
One end of the second coil of inductance L1 is connected with the negative input of the other end of X capacitor CX1 and the power module, common mode
The other end of the second coil of inductance L1 is connected with differential mode inductance L4；One end of the differential mode inductance L2 and the common mode inductance L1
First coil be connected, the other end of the differential mode inductance L2 is connected with Y capacitance CY1；One end of the differential mode inductance L4 and institute
The second coil for stating common mode inductance L1 is connected, and the other end of the differential mode inductance L4 is connected with Y capacitance CY2；The Y capacitance CY1
One end be connected with the differential mode inductance L2, the other end of Y capacitance CY1 ground connection；One end of the Y capacitance CY2 with it is described
Differential mode inductance L4 is connected, the other end ground connection of the Y capacitance CY2.
The selection of inductance L1, L2 and L4 need to pay close attention to the current margin of inductance coiling and the stress levels of enameled wire；X capacitor
The selection of CX1 is needed according to the suitable capacitor of the variation of input voltage selection pressure resistance；The selection of Y capacitance CY1 and CY2 need to pay close attention to
The pressure voltage and safety grade of capacitor.The selection of the above device is also required to switching frequency and concrete application ring according to power work
The experimental result in border is matched, to seek to reach best filter effect.
The secondary filter circuit can carry out second level common mode filtering processing.Referring to Fig. 3, the secondary filter circuit is main
It is made of common mode inductance L3, X capacitor C3.Main function is to carry out common mode filtering processing, reduces the interference of power supply.
In the secondary filter circuit, one end of the first coil of common mode inductance L3 and the differential mode inductance L2 and described
Y capacitance CY1 is connected, the other end of the first coil of the common mode inductance L3 and the cathode of transient suppressor TVS1 and diode D1
It is connected；One end of the second coil of common mode inductance L3 is connected with the differential mode inductance L4 and the Y capacitance CY2, the common mode
The other end of the second coil of inductance L3 is grounded；One end of the transient suppressor TVS1 is connected with the cathode of diode D1, separately
One end ground connection；One end of X capacitor C3 is connected with the electrode input end of the positive and described DC converter of the diode D1,
The other end of X capacitor C3 is grounded and is connected with the negative input of the DC converter；X capacitor C6 and the X capacitor C3 are simultaneously
Connection.
Wherein, the selection of inductance L3 is it should be noted that the current margin of inductance coiling and the stress levels of enameled wire；X capacitor C3
Selection with C6 is needed according to the suitable capacitor of the variation of input voltage selection pressure resistance.The above device selection is also needed according to electricity
The switching frequency and specific experiment result of source work are matched, to reach best filter effect.
Referring to Fig. 2, in one embodiment, the power module, further includes: the first input filter circuit 15,
First input filter circuit 15 is electric with the input terminal of the DC converter 11 and the secondary filter respectively
Road 13 is connected, and the signal for exporting to the secondary filter circuit 13 carries out pressure stabilizing and filtering.
First input filter circuit can carry out pressure stabilizing and filtering processing to input power.Referring to Fig. 3, described first
Input filter circuit is mainly made of capacitor C4 and C5, for carrying out pressure stabilizing and filtering processing to module input, guarantees module
Normal work.
In first input filter circuit, the electrode input end phase of one end of filter capacitor C4 and the DC converter
Even, the other end of filter capacitor C4 is grounded and is connected with the negative input of the DC converter；Filter capacitor C5 with it is described
Filter capacitor C4 is in parallel.
C4 and C5 is alminium electrolytic condenser, capacity maximum 15000uF, it is recommended to use 300uF or more capacitance, pressure voltage is according to mould
Block input voltage is chosen, and can specifically be modified according to application environment and experimental result.
Referring to Fig. 2, in one embodiment, the power module, further includes: the second input filter circuit 16.
Referring to Fig. 3, in second input filter circuit, one end of Y capacitance CY4 and the DC converter it is positive defeated
Enter end to be connected, the other end ground connection of Y capacitance CY4；One end of Y capacitance CY5 is connected with the negative input of the DC converter,
The other end of Y capacitance CY5 is grounded.
The capacitance of input filter Y capacitance CY4 and CY5 can choose 10nF, and safety grade is Y2.
Referring to Fig. 2, in one embodiment, the power module, further includes: output filter circuit 17,
The output filter circuit 17 is connected with the output end of the DC converter 11, for the DC converter
11 output signal is filtered.
Referring to Fig. 3, in the output filter circuit, the both ends of filter capacitor C10 respectively with the DC converter just
Pole output end is connected with cathode output end；One end of filtering Y capacitance CY3 is connected with the cathode output end of the DC converter,
Filter the other end ground connection of Y capacitance CY3；One end of filtering Y capacitance CY6 is connected with the cathode output end of the DC converter,
Filter the other end ground connection of Y capacitance CY6.
Output filtering Y capacitance CY3 and CY6 capacitance can choose 4.7nF, and safety grade is Y2.Output filter capacitor C10 is needed
Amount of capacity, recommendation 1uF/W are selected according to output power, capacitor pressure voltage is chosen according to output voltage..
It will appreciated by the skilled person that whole or certain steps, system, dress in method disclosed hereinabove
Functional module/unit in setting may be implemented as software, firmware, hardware and its combination appropriate.In hardware embodiment,
Division between the functional module/unit referred in the above description not necessarily corresponds to the division of physical assemblies；For example, one
Physical assemblies can have multiple functions or a function or step and can be executed by several physical assemblies cooperations.Certain groups
Part or all components may be implemented as by processor, such as the software that digital signal processor or microprocessor execute, or by
It is embodied as hardware, or is implemented as integrated circuit, such as specific integrated circuit.Such software can be distributed in computer-readable
On medium, computer-readable medium may include computer storage medium (or non-transitory medium) and communication media (or temporarily
Property medium).As known to a person of ordinary skill in the art, term computer storage medium is included in for storing information (such as
Computer readable instructions, data structure, program module or other data) any method or technique in the volatibility implemented and non-
Volatibility, removable and nonremovable medium.Computer storage medium include but is not limited to RAM, ROM, EEPROM, flash memory or its
His memory technology, CD-ROM, digital versatile disc (DVD) or other optical disc storages, magnetic holder, tape, disk storage or other
Magnetic memory apparatus or any other medium that can be used for storing desired information and can be accessed by a computer.This
Outside, known to a person of ordinary skill in the art to be, communication media generally comprises computer readable instructions, data structure, program mould
Other data in the modulated data signal of block or such as carrier wave or other transmission mechanisms etc, and may include any information
Delivery media.
Claims (10)
1. a kind of power module, including DC converter, which is characterized in that further include: connected level-one filter circuit and second level
Filter circuit, wherein
The level-one filter circuit is used to carry out common mode filtering to input signal and differential mode filters；
The secondary filter circuit is connected with the DC converter, and the signal for exporting to the level-one filter circuit carries out
Common mode filtering.
2. power module according to claim 1, which is characterized in that further include: surge restraint circuit,
The surge restraint circuit is connected with the level-one filter circuit, for inhibiting the surge of the input signal.
3. power module according to claim 2, which is characterized in that in the surge restraint circuit, FU1's insured in front end
One end is connected with the electrode input end of the power module, front end insure the other end of FU1 respectively with varistor RV1, pressure-sensitive
Resistance RV2 is connected with varistor RV3；One end of varistor RV1 is connected with front end insurance FU1, varistor RV1's
The other end is connected with the negative input of the power module；One end of varistor RV2 and the cathode of the power module are defeated
Enter end to be connected, other end ground connection；One end of varistor RV3 is connected with front end insurance FU1, other end ground connection.
4. power module according to claim 3, which is characterized in that in the level-one filter circuit, X capacitor CX1 and institute
It is in parallel to state varistor RV1；One end of the first coil of common mode inductance L1 is connected with one end of X capacitor CX1, common mode inductance L1's
The other end of first coil is connected with differential mode inductance L2；One end of the second coil of common mode inductance L1 and the other end of X capacitor CX1
And the negative input of the power module is connected, the other end and the differential mode inductance L4 phase of the second coil of common mode inductance L1
Even；One end of the differential mode inductance L2 is connected with the first coil of the common mode inductance L1, the other end of the differential mode inductance L2
It is connected with Y capacitance CY1；One end of the differential mode inductance L4 is connected with the second coil of the common mode inductance L1, the differential mode electricity
The other end of sense L4 is connected with Y capacitance CY2；One end of the Y capacitance CY1 is connected with the differential mode inductance L2, the Y capacitance
The other end of CY1 is grounded；One end of the Y capacitance CY2 is connected with the differential mode inductance L4, another termination of the Y capacitance CY2
Ground.
5. power module according to claim 4, which is characterized in that in the secondary filter circuit, common mode inductance L3's
One end of first coil is connected with the differential mode inductance L2 and the Y capacitance CY1, the first coil of the common mode inductance L3
The other end is connected with the cathode of transient suppressor TVS1 and diode D1；One end of the second coil of common mode inductance L3 and the difference
The mould inductance L4 and Y capacitance CY2 is connected, the other end ground connection of the second coil of the common mode inductance L3；The transient state suppression
One end of device TVS1 processed is connected with the cathode of diode D1, other end ground connection；One end of X capacitor C3 and the diode D1 are just
The electrode input end of pole and the DC converter is connected, the other end of X capacitor C3 ground connection and with the DC converter
Negative input is connected；X capacitor C6 is in parallel with the X capacitor C3.
6. power module described according to claim 1~any one of 5, which is characterized in that further include: the first input filter
Circuit,
First input filter circuit is connected with the input terminal of the DC converter and the secondary filter circuit respectively, uses
Pressure stabilizing and filtering are carried out in the signal to the secondary filter circuit output.
7. power module according to claim 6, which is characterized in that
In first input filter circuit, one end of filter capacitor C4 is connected with the electrode input end of the DC converter,
The other end of filter capacitor C4 is grounded and is connected with the negative input of the DC converter；Filter capacitor C5 and the filtering
Capacitor C4 is in parallel.
8. power module according to claim 6, which is characterized in that further include: the second input filter circuit,
In second input filter circuit, one end of Y capacitance CY4 is connected with the electrode input end of the DC converter, Y electricity
Hold the other end ground connection of CY4；One end of Y capacitance CY5 is connected with the negative input of the DC converter, and Y capacitance CY5's is another
One end ground connection.
9. power module described according to claim 1~any one of 5, which is characterized in that further include: output filtered electrical
Road,
The output filter circuit is connected with the output end of the DC converter, for the output letter to the DC converter
It number is filtered.
10. power module according to claim 9, which is characterized in that in the output filter circuit, filter capacitor C10
Both ends be connected respectively with the cathode output end of the DC converter and cathode output end；Filter one end and the institute of Y capacitance CY3
The cathode output end for stating DC converter is connected, the other end ground connection of filtering Y capacitance CY3；Filter one end and the institute of Y capacitance CY6
The cathode output end for stating DC converter is connected, the other end ground connection of filtering Y capacitance CY6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811560735.4A CN109600035A (en) | 2018-12-20 | 2018-12-20 | A kind of power module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811560735.4A CN109600035A (en) | 2018-12-20 | 2018-12-20 | A kind of power module |
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| CN109600035A true CN109600035A (en) | 2019-04-09 |
Family
ID=65963001
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112448600A (en) * | 2019-09-03 | 2021-03-05 | 西安航兴海拓电子科技有限公司 | Integrated power supply |
| CN112510991A (en) * | 2020-12-15 | 2021-03-16 | 中国电子科技集团公司第四十四研究所 | EMC protection device and power supply front end filter circuit of small-size photoelectric conversion subassembly |
| CN112737325A (en) * | 2020-12-25 | 2021-04-30 | 卡斯柯信号有限公司 | Vehicle-mounted power supply system |
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| CN105099165A (en) * | 2014-05-19 | 2015-11-25 | 北京东土科技股份有限公司 | EMC protection and filtering device and method of high voltage power supply |
| CN205901579U (en) * | 2016-07-07 | 2017-01-18 | 成都必控科技股份有限公司 | Steady voltage output filter component with transient state inhibit feature |
| CN206294066U (en) * | 2016-12-27 | 2017-06-30 | 西安晟昕科技发展有限公司 | A kind of filtering system for suppressing power module common-mode noise |
| CN207459727U (en) * | 2017-10-27 | 2018-06-05 | 深圳市科思科技股份有限公司 | A kind of filter circuit |
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| CN107920137A (en) * | 2018-01-12 | 2018-04-17 | 成都互聚科技有限公司 | A kind of safe communication system |
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| CN112510991A (en) * | 2020-12-15 | 2021-03-16 | 中国电子科技集团公司第四十四研究所 | EMC protection device and power supply front end filter circuit of small-size photoelectric conversion subassembly |
| CN112510991B (en) * | 2020-12-15 | 2024-10-01 | 中国电子科技集团公司第四十四研究所 | EMC protection device of small-sized photoelectric conversion assembly and power supply front-end filter circuit |
| CN112737325A (en) * | 2020-12-25 | 2021-04-30 | 卡斯柯信号有限公司 | Vehicle-mounted power supply system |
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Application publication date: 20190409 |