CN107579656A - A kind of DC dc converter and electric automobile - Google Patents
A kind of DC dc converter and electric automobile Download PDFInfo
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- CN107579656A CN107579656A CN201710729928.7A CN201710729928A CN107579656A CN 107579656 A CN107579656 A CN 107579656A CN 201710729928 A CN201710729928 A CN 201710729928A CN 107579656 A CN107579656 A CN 107579656A
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- electromagnetic interference
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Abstract
The invention provides a kind of DC dc converter and electric automobile, the DC dc converter includes：DC dc converter body and the low-pressure port filter for being arranged at the DC dc converter body output end；The DC dc converter body receives the first electric signal, and power conversion is carried out to first electric signal and handles to obtain the second electric signal, and by second electric signal output to the low-pressure port filter, the low-pressure port filter filters to the electromagnetic interference in second electric signal, and by the second electric signal output after filtering to battery.The present invention filters to the electric signal for entering battery by setting low-pressure port filter in DC dc converter body output end, so as to filter out electromagnetic interference, alleviates the influence to battery.
Description
Technical field
The present invention relates to auto parts and components field, more particularly to a kind of DC-DC converter and electric automobile.
Background technology
In electric automobile, high voltage is converted to low-voltage by DC-DC converter, substitutes the generator of conventional fuel oil car
Give the system power supply such as low tension battery and car light, wiper, power windows, vehicle sound.DC-DC converter works
When, the electrical equipment in circuit for power conversion includes metal oxide semiconductor transistor, causes electric current, electricity in the short time
Bucklingization is very big, and its electromagnetic Compatibility Design is related to low-voltage power supply quality and vehicle radiation-emitting is horizontal, and carries electromagnetism
The electric signal of interference enters the performance that battery can influence battery.
Therefore the filter design of DC-DC converter output end is particularly important and very complicated.In DC-dc conversion
Device internal output terminal is filtered design and is difficult to meet technical requirements.
The content of the invention
The invention provides a kind of DC-DC converter and electric automobile, to solve in the prior art in direct current-straight
The problem of filter design is difficult to inside current converter.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that：
According to one aspect of the present invention, there is provided a kind of DC-DC converter, including：DC-DC converter sheet
Body and the low-pressure port filter for being arranged at the DC-DC converter body output end；
The DC-DC converter body receives the first electric signal, and carries out power conversion to first electric signal
Processing obtains the second electric signal, and by second electric signal output to the low-pressure port filter, the low-pressure port
Filter is filtered to the electromagnetic interference in second electric signal, and the second electric signal output after filtering is extremely stored
Battery.
Further, the low-pressure port filter includes：
Insulation shell with the first cavity and the first electromagnetic interference suppression circuit being arranged in first cavity；
First electromagnetic interference suppression circuit filters to the DM EMI in second electric signal, and will filtering
The second electric signal output afterwards is to battery.
Further, first electromagnetic interference suppression circuit includes：First electric capacity and the second electric capacity；
The first end of first electric capacity is connected with the positive output end of the DC-DC converter body output end,
Second end is grounded；
The first end of second electric capacity is connected with the positive output end of the DC-DC converter body output end,
Second end is grounded.
Further, the capacitance of first electric capacity is more than the capacitance of second electric capacity.
Further, the DC-DC converter also includes：It is arranged at the DC-DC converter body input
The high pressure port filter at end；
The high pressure port filter filters to the electromagnetic interference in the electric signal that receives, obtains described first
Electric signal, and by first electric signal output to the DC-DC converter body.
Further, the high pressure port filter includes：
Metal-back with the second cavity and the second electromagnetic interference suppression circuit being arranged in second cavity；
Second electromagnetic interference suppression circuit was carried out to the DM EMI in the electric signal that receives and common mode disturbances
Filter, obtains first electric signal, and by first electric signal output to the DC-DC converter body.
Further, second electromagnetic interference suppression circuit includes：3rd electric capacity, the 4th electric capacity, the 5th electric capacity and altogether
Mould inductance；
The first end of first winding of the common mode inductance (L) is connected with the first end of the 3rd electric capacity, the second end with
The first end of 4th electric capacity and the positive input of the DC-DC converter body input are all connected with；
The first end of second winding of the common mode inductance is connected with the second end of the 3rd electric capacity, the second end with it is described
The negative input of the first end of 5th electric capacity and the DC-DC converter body input is all connected with；
Second end of the 4th electric capacity is connected with the second end of the 5th electric capacity, and is connected to ground.
Further, the DC-DC converter body includes：Power conversion circuit；
The positive input of the power conversion circuit is connected with the first end of the 4th electric capacity, the power conversion electricity
The negative input on road is connected with the first end of the 5th electric capacity.
Further, the DC-DC converter body also includes：Converter housing with the 3rd cavity, it is described
Metal-back and the power conversion circuit may be contained within the 3rd cavity.
Further, the metal-back is connected with the converter housing.
According to it is still another aspect of the present invention to provide a kind of electric automobile, including：Vehicle body, and above-mentioned DC-to-dc
Converter.
The beneficial effects of the invention are as follows：
Above-mentioned technical proposal, DC-DC converter body receives the first electric signal, and carries out power to the first electric signal
Conversion process obtains the second electric signal, and DC-DC converter body output end is provided with low-pressure port filter, the low pressure
Port filter is filtered to the electromagnetic interference in the second electric signal, and the second electric signal output after filtering is extremely stored
Battery, so as to alleviate influence of the electromagnetic interference to battery.
Brief description of the drawings
Fig. 1 represents a kind of DC-DC converter overall schematic provided in an embodiment of the present invention；
Fig. 2 represents a kind of one of DC-DC converter partial schematic diagram provided in an embodiment of the present invention；
Fig. 3 represents the two of a kind of DC-DC converter partial schematic diagram provided in an embodiment of the present invention.
Description of reference numerals：
1st, DC-DC converter body；11st, power conversion circuit；12nd, converter housing；2nd, low-pressure port filtering dress
Put；21st, the first electromagnetic interference suppression circuit；3rd, battery；4th, high pressure port filter；41st, the second electromagnetic interference suppresses electricity
Road；C1, the first electric capacity；C2, the second electric capacity；C3, the 3rd electric capacity；C4, the 4th electric capacity；C5, the 5th electric capacity；L, common mode inductance.
Embodiment
The exemplary embodiment of the present invention is more fully described below with reference to accompanying drawings.Although the present invention is shown in accompanying drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the present invention without should be by embodiments set forth here
Limited.Conversely, there is provided these embodiments are to be able to be best understood from the present invention, and can be by the scope of the present invention
Completely it is communicated to those skilled in the art.
As Figure 1-3, the embodiments of the invention provide a kind of DC-DC converter, the DC-DC converter bag
Include：DC-DC converter body 1 and the low-pressure port filter 2 for being arranged at the output end of DC-DC converter body 1；
DC-DC converter body 1 receives the first electric signal, and carries out power conversion to the first electric signal and handle to obtain
Second electric signal, and by the second electric signal output to low-pressure port filter 2, low-pressure port filter 2 is to the second telecommunications
Electromagnetic interference in number is filtered, and by the second electric signal output after filtering to battery 3.
It should be noted that DC-DC converter body 1 has the function of voltage conversion, under normal circumstances will input
Higher voltage switch to 12 volts relatively low of voltage, then charged to battery 3.The voltage of specific second electric signal
Magnitude of voltage of the value less than the first electric signal.
In the embodiment of the present invention, the output end of DC-DC converter body 1 is provided with low-pressure port filter 2, and this is low
Pressure side mouth filter 2 filters to the electromagnetic interference in the second electric signal, and by the second electric signal output after filtering
To battery 3, so as to alleviate influence of the electromagnetic interference to battery 3.
On the basis of foregoing invention embodiment, in the embodiment of the present invention, low-pressure port filter 2 includes：
Insulation shell with the first cavity and the first electromagnetic interference suppression circuit 21 being arranged in the first cavity；
First electromagnetic interference suppression circuit 21 filters to the DM EMI in the second electric signal, and by after filtering
Second electric signal output is to battery 3.
It is it should be noted that more tired due to designing electromagnetic interference suppression circuit in DC-DC converter body 1
Difficulty, the first electromagnetic interference suppression circuit 21 is arranged at outside DC-DC converter body 1 in the embodiment of the present invention, and is led to
Cross insulation shell and wrap up the first electromagnetic interference suppression circuit 21, avoid the internal circuit of DC-DC converter body 1, to the first electricity
The influence of magnetic disturbance suppression circuit 21.Preferably, insulation shell is plastic housing.
In foregoing invention embodiment, the first electromagnetic interference suppression circuit 21 is for suppressing, filter electromagnetic interference, can use
Electromagnetic interference suppression circuit of the prior art.Preferably, the first electromagnetic interference suppression circuit 21 includes：First electric capacity C1 and
Two electric capacity C2；
First electric capacity C1 first end is connected with the positive output end of the output end of DC-DC converter body 1, the second end
Ground connection；
Second electric capacity C2 first end is connected with the positive output end of the output end of DC-DC converter body 1, the second end
Ground connection.
It should be noted that the first electric capacity C1 capacitance is more than the second electric capacity C2 capacitance, and the first electric capacity C1
Capacitance and the second electric capacity C2 capacitance, can be designed according to different vehicles.First electric capacity C1 is used to suppress low
Frequency DM EMI, the second electric capacity C2 are used to suppress high frequency differential mode interference.First electric capacity C1 the second end and the of the second electric capacity C2
Two ends are connected with vehicle body, preferably, by metal knitted line by the second of the first electric capacity C1 the second end and the second electric capacity C2
End is connected with vehicle body.The positive output end of the output end of DC-DC converter body 1 is connected with the positive pole of battery 3, and direct current-
The negative sense output end of the output end of DC converter body 1 is connected with the negative pole of battery 3.
In order to further reduce the influence of electromagnetic interference, on the basis of above-mentioned each inventive embodiments, the embodiment of the present invention
In, DC-DC converter also includes：It is arranged at the high pressure port filter 4 of the input of DC-DC converter body 1；
High pressure port filter 4 filters to the electromagnetic interference in the electric signal that receives, obtains the first electric signal,
And by the first electric signal output to DC-DC converter body 1.
On the basis of above-mentioned each inventive embodiments, in the embodiment of the present invention, high pressure port filter 4 includes：
Metal-back with the second cavity and the second electromagnetic interference suppression circuit 41 being arranged in the second cavity；
Second electromagnetic interference suppression circuit 41 filters to the DM EMI in the electric signal that receives and common mode disturbances,
Obtain the first electric signal, and by the first electric signal output to DC-DC converter body 1.
In foregoing invention embodiment, the second electromagnetic interference suppression circuit 41 is for suppressing, filter electromagnetic interference, can use
Electromagnetic interference suppression circuit of the prior art.Preferably, the second electromagnetic interference suppression circuit 41 includes：3rd electric capacity C3,
Four electric capacity C4, the 5th electric capacity C5 and common mode inductance L；
The first end of common mode inductance L the first winding is connected with the 3rd electric capacity C3 first end, the second end and the 4th electric capacity
C4 first end and the positive input of the input of DC-DC converter body 1 are all connected with；
The first end of common mode inductance L the second winding is connected with the 3rd electric capacity C3 the second end, the second end and the 5th electric capacity
C5 first end and the negative input of the input of DC-DC converter body 1 are all connected with；
4th electric capacity C4 the second end is connected with the 5th electric capacity C5 the second end, and is connected to ground.
It should be noted that the 3rd electric capacity C3 is X electric capacity, and for suppressing DM EMI.4th electric capacity C4 and the 5th
Electric capacity C5 is the electric capacity with model same specification, and the 4th electric capacity C4 and the 5th electric capacity C5 are Y capacitance, for suppressing the interference of work mould,
Preferably, the 4th electric capacity C4 and the 5th electric capacity C5 capacitance is 4700pF.Common mode inductance L disturbs for suppression common mode.
On the basis of above-mentioned each inventive embodiments, in the embodiment of the present invention, DC-DC converter body 1 includes：Work(
Rate translation circuit 11；
The positive input of power conversion circuit 11 is connected with the 4th electric capacity C4 first end, and power conversion circuit 11 is born
It is connected to input with the 5th electric capacity C5 first end.
It should be noted that DC-DC converter body 1 also includes：Converter housing 12 with the 3rd cavity, gold
Category shell and power conversion circuit 11 may be contained within the 3rd cavity.That is high pressure port filter 4 is arranged at direct current-straight
Inside current converter body 1, preferably, metal-back is connected with converter housing 12.Of course for more preferable radiating, direct current-straight
Current converter body 1 also includes：Heat-radiating substrate, heat-radiating substrate are arranged in the 3rd cavity of converter housing 12, and with change
Exchanger shell 12 connects.
To carry according to it is still another aspect of the present invention to provide a kind of automobile, including vehicle body and above-mentioned each inventive embodiments
The DC-DC converter of confession.
It should be noted that the converter housing 12 of DC-DC converter body 1 can be connected with vehicle body.
In automobile provided in an embodiment of the present invention, DC-DC converter body 1 receives the first electric signal, and to first
Electric signal carries out power conversion and handles to obtain the second electric signal, and the output end of DC-DC converter body 1 is provided with low-pressure port
Filter 2, the low-pressure port filter 2 filter to the electromagnetic interference in the second electric signal, and by after filtering
Second electric signal output is to battery 3, so as to alleviate influence of the electromagnetic interference to battery.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be that machinery connects
Connect or electrically connect or can communicate with one another；Can be joined directly together, can also be indirectly connected by intermediary, can
To be connection or the interaction relationship of two elements of two element internals.For the ordinary skill in the art,
The concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
Although having been described for the preferred embodiment of the embodiment of the present invention, those skilled in the art once know base
This creative concept, then other change and modification can be made to these embodiments.So appended claims are intended to be construed to
Including preferred embodiment and fall into having altered and changing for range of embodiment of the invention.
Finally, it is to be noted that, herein, such as first and second or the like relational terms be used merely to by
One entity or operation make a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between any this actual relation or order be present.Moreover, term " comprising ", "comprising" or its any other variant meaning
Covering including for nonexcludability, so that process, method, article or terminal device including a series of elements are not only wrapped
Those key elements, but also the other element including being not expressly set out are included, or is also included for this process, method, article
Or the key element that terminal device is intrinsic.In the absence of more restrictions, wanted by what sentence "including a ..." limited
Element, it is not excluded that other identical element in the process including the key element, method, article or terminal device also be present.
Claims (11)
- A kind of 1. DC-DC converter, it is characterised in that including：DC-DC converter body (1) and it is arranged at described The low-pressure port filter (2) of DC-DC converter body (1) output end；The DC-DC converter body (1) receives the first electric signal, and first electric signal is carried out at power conversion Reason obtains the second electric signal, and by second electric signal output to the low-pressure port filter (2), the low-pressure port Filter (2) filters to the electromagnetic interference in second electric signal, and by the second electric signal output after filtering To battery (3).
- 2. DC-DC converter according to claim 1, it is characterised in that low-pressure port filter (2) bag Include：Insulation shell with the first cavity and the first electromagnetic interference suppression circuit (21) being arranged in first cavity；First electromagnetic interference suppression circuit (21) is filtered to the DM EMI in second electric signal, and will filtering The second electric signal output afterwards is to battery (3).
- 3. DC-DC converter according to claim 2, it is characterised in that first electromagnetic interference suppression circuit (21) include：First electric capacity (C1) and the second electric capacity (C2)；The positive output end of the first end of first electric capacity (C1) and DC-DC converter body (1) output end connects Connect, the second end ground connection；The positive output end of the first end of second electric capacity (C2) and DC-DC converter body (1) output end connects Connect, the second end ground connection.
- 4. DC-DC converter according to claim 3, it is characterised in that the capacitance of first electric capacity (C1) More than the capacitance of second electric capacity (C2).
- 5. DC-DC converter according to claim 1, it is characterised in that the DC-DC converter also wraps Include：It is arranged at the high pressure port filter (4) of DC-DC converter body (1) input；The high pressure port filter (4) is filtered to the electromagnetic interference in the electric signal that receives, obtains described first Electric signal, and by first electric signal output to the DC-DC converter body (1).
- 6. DC-DC converter according to claim 5, it is characterised in that high pressure port filter (4) bag Include：Metal-back with the second cavity and the second electromagnetic interference suppression circuit (41) being arranged in second cavity；Second electromagnetic interference suppression circuit (41) was carried out to the DM EMI in the electric signal that receives and common mode disturbances Filter, obtains first electric signal, and by first electric signal output to the DC-DC converter body (1).
- 7. DC-DC converter according to claim 6, it is characterised in that second electromagnetic interference suppression circuit (41) include：3rd electric capacity (C3), the 4th electric capacity (C4), the 5th electric capacity (C5) and common mode inductance (L)；The first end of first winding of the common mode inductance (L) is connected with the first end of the 3rd electric capacity (C3), the second end with The first end of 4th electric capacity (C4) and the positive input of the DC-DC converter body (1) input connect Connect；The first end of second winding of the common mode inductance (L) is connected with the second end of the 3rd electric capacity (C3), the second end with The first end of 5th electric capacity (C5) and the negative input of the DC-DC converter body (1) input connect Connect；Second end of the 4th electric capacity (C4) is connected with the second end of the 5th electric capacity (C5), and is connected to ground.
- 8. DC-DC converter according to claim 7, it is characterised in that the DC-DC converter body (1) include：Power conversion circuit (11)；The positive input of the power conversion circuit (11) is connected with the first end of the 4th electric capacity (C4), and the power becomes The negative input for changing circuit (11) is connected with the first end of the 5th electric capacity (C5).
- 9. DC-DC converter according to claim 8, it is characterised in that the DC-DC converter body (1) also include：Converter housing (12) with the 3rd cavity, the metal-back and the power conversion circuit (11) are respectively provided with In in the 3rd cavity.
- 10. DC-DC converter according to claim 9, it is characterised in that the metal-back and the converter shell Body (12) connects.
- 11. a kind of electric automobile, including：Vehicle body, it is characterised in that also include：It is straight as described in claim any one of 1-10 Stream-DC converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710729928.7A CN107579656A (en) | 2017-08-23 | 2017-08-23 | A kind of DC dc converter and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710729928.7A CN107579656A (en) | 2017-08-23 | 2017-08-23 | A kind of DC dc converter and electric automobile |
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| Publication Number | Publication Date |
|---|---|
| CN107579656A true CN107579656A (en) | 2018-01-12 |
Family
ID=61035117
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710729928.7A Pending CN107579656A (en) | 2017-08-23 | 2017-08-23 | A kind of DC dc converter and electric automobile |
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| CN (1) | CN107579656A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110362850A (en) * | 2019-04-30 | 2019-10-22 | 北京理工大学 | A kind of modeling method of new-energy automobile high-low pressure DC converting system electromagnetic interference emission circuit model |
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Application publication date: 20180112 |