CN206146995U - Do you be used for new energy automobile DC high voltage isolation sampling circuit of DC converter - Google Patents
Do you be used for new energy automobile DC high voltage isolation sampling circuit of DC converter Download PDFInfo
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- CN206146995U CN206146995U CN201621217608.0U CN201621217608U CN206146995U CN 206146995 U CN206146995 U CN 206146995U CN 201621217608 U CN201621217608 U CN 201621217608U CN 206146995 U CN206146995 U CN 206146995U
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Abstract
The utility model provides a do you be used for new energy automobile DC high voltage isolation sampling circuit of DC converter, including the busbar voltage of order connection decay filter module, VF conversion module, optoelectronic isolation transport module and waveform shaping filter module, be the busbar voltage decay filter module suitable for new energy automobile DC the generating line high pressure of the DC converter post -filter output DC voltage of attenuateing, VF conversion module is suitable for the DC voltage to the output of busbar voltage decay filter module to carry out VF conversion back output frequence signal, optoelectronic isolation transport module is suitable for the frequency signal to VF conversion module conversion back output to carry out the optoelectronic isolation transmission, waveform shaping filter module is suitable for the frequency signal to the optoelectronic isolation transport module conveying to carry out plastic post -filter output criterion square signal. The utility model discloses being arranged in busbar voltage high voltage isolation sampling circuit with VF conversion module, having solved and carried out high voltage isolation with the opto -coupler and gather the temperature bring the very big problem of floating, the reliability is high, and is with low costs.
Description
Technical field
This utility model is related to high_voltage isolation Sampling techniques field, and in particular to a kind of to become for new-energy automobile DC-DC
The high_voltage isolation sample circuit of parallel operation.
Background technology
At present, the bus high_voltage isolation sample circuit of new-energy automobile dc-dc, it is main using 2 linear optical couplings+
The linear isolation sample circuit of operational amplifier composition, the circuit have the higher linearity.But, invention of the present utility model
People has found that through research the linear isolation Acquisition Circuit of linear optical coupling+operational amplifier composition has temperature stability very poor (i.e.
Temperature drift) defect, this is the light as the temperature characterisitic of the photoelectricity class device such as optocoupler determines which when temperature changes
The current transfer ratio of coupling can change, and when the current transfer ratio change of 2 optocouplers is inconsistent, its output voltage will be sent out
The very big change of life, temperature drift reach more than 2000ppm, cause busbar voltage collection inaccurate.
Utility model content
The linear isolation Acquisition Circuit of the linear optical coupling existed for prior art+operational amplifier composition has temperature steady
Qualitative very poor technical problem, this utility model provides a kind of novel high-pressure for new-energy automobile DC-DC converter isolates
Sample circuit.
In order to solve above-mentioned technical problem, this utility model employs following technical scheme：
A kind of high_voltage isolation sample circuit for new-energy automobile DC-DC converter, including the bus electricity being linked in sequence
Pressure attenuation filter module, V/F modular converters, Phototube Coupling transport module and waveform shaping filtration module；Wherein, the bus electricity
Pressure attenuation filter module exports unidirectional current after being suitable to carry out attenuation filter to the bus high pressure of new-energy automobile DC-DC converter
Pressure, the V/F modular converters are suitable to carry out the DC voltage of busbar voltage attenuation filter module output output frequency after V/F conversions
Rate signal, the frequency signal that the Phototube Coupling transport module is exported after being suitable to change V/F modular converters carry out Phototube Coupling
Transmission, the waveform shaping filtration module be suitable to Phototube Coupling transport module transmission frequency signal carry out it is defeated after shaping filter
Go out standard block signal.
Further, the busbar voltage attenuation filter module include resistance R28, resistance 29, resistance R33, electric capacity C29 and
Electric capacity C30, one end of the resistance R28 are connected with the positive voltage Vin++ of busbar voltage, the other end and the electricity of the resistance R28
Resistance 29, one end of resistance R33 and electric capacity C29 connects jointly, the other end and electric capacity C30 of the resistance R33 and electric capacity C29
One end is connected with the negative voltage Vin-- of busbar voltage, and the other end of the resistance 29 and electric capacity C30 is commonly connected to V/F conversions
Module.
Further, the V/F modular converters include resistance R20, resistance R45, resistance R46, resistance R47, electric capacity C15,
Electric capacity C28, electric capacity C38 and V/F conversion chip U5, one end of the electric capacity C15 are connected with the negative voltage Vin-- of busbar voltage,
The other end of the electric capacity C15 is connected with one end of resistance R20, the 8th foot of V/F conversion chip U5 and supply voltage P5V, described
The other end of resistance R20 is connected with one end of the 5th foot and electric capacity C28 of V/F conversion chip U5, the other end of the electric capacity C28
It is connected with the negative voltage Vin-- of busbar voltage, the 7th foot and the busbar voltage attenuation filter module of the V/F conversion chips U5
Outfan connects, and the 1st foot and electric capacity C38, one end of resistance R47 and resistance R45 and the V/F of the V/F conversion chips U5 turn
The 6th foot connection of chip U5 is changed, one end of the resistance R46 is connected with the 2nd foot of V/F conversion chip U5, the resistance R46,
Negative voltage of 4th foot of electric capacity C38, the other end of resistance R47 and resistance R45 and V/F conversion chip U5 with busbar voltage
Vin-- connects, and the 3rd foot of the V/F conversion chips U5 is connected to Phototube Coupling transport module.
Further, model 103COG of the electric capacity C28 and electric capacity C38.
Further, the Phototube Coupling transport module includes resistance R25, resistance R39, resistance L5, optocoupler PC1, electric capacity
C26 and electric capacity C33, one end of the resistance R25 are connected with supply voltage P5V, the other end and electric capacity C26 of the resistance R25
One end be connected with the input positive terminal of optocoupler PC1, the other end of the electric capacity C26 and the input negative terminal of optocoupler PC1 and V/F are changed
Module connects, one end connection 3.3V DC voltages of the resistance L5, and the other end of the resistance L5 is with the output of optocoupler PC1 just
End connection, one end of the resistance capacitance C33 and resistance R39 are connected with the output negative terminal of optocoupler PC1, the resistance capacitance C33
It is grounded with the other end of resistance R39, and the output positive and negative terminal of the optocoupler PC1 is connected to waveform shaping filtration module.
Further, the waveform shaping filtration module includes resistance R34, resistance R40, resistance R22, resistance R30, electric capacity
C16, electric capacity C34, electric capacity C35 and audion Q11, one end of the electric capacity C16 and resistance R22 and the output plus terminal of optocoupler PC1
Connection, the other end ground connection of the electric capacity C16, one end of the resistance R34 are connected with the output negative terminal of optocoupler PC1, the electricity
The other end of resistance R34 is connected with one end of resistance R40 and the base stage of audion Q11, the other end and resistance of the resistance R22
One end of R30 and electric capacity C34 and the colelctor electrode connection of audion Q11, one end of the other end and electric capacity C35 of the resistance R30
Connection as the outfan of whole high_voltage isolation sample circuit, the other end of the resistance R40, electric capacity C34 and electric capacity C35 and
The emitter stage of audion Q11 is grounded.
Compared with prior art, the high_voltage isolation for new-energy automobile DC-DC converter that this utility model is provided is adopted
Sample circuit, including the busbar voltage attenuation filter module, V/F modular converters, Phototube Coupling transport module and the waveform that are linked in sequence
Shaping filter module, the bus high pressure of its DC-DC converter export direct current Jing after busbar voltage attenuation filter module attenuation filter
Voltage, the DC voltage are sent into V/F modular converters and carry out output frequency signal after V/F conversions, the frequency signal through photoelectricity every
After transport module isolation transmission, then shaping filter, the square-wave signal of last outputting standard are carried out by waveform shaping filtration module
Frequency sampling is carried out to DSP single-chip microcomputers, corresponding busbar voltage is calculated by frequency values.The application by V/F modular converters into
Work(is used in busbar voltage high_voltage isolation sample circuit, carries out high_voltage isolation collection institute in efficiently solving prior art with optocoupler
The very big technical problem of the temperature drift that brings, thus the temperature stability of high_voltage isolation sample circuit that the application is provided is very
Good, reliability is high, and low cost.
Description of the drawings
Fig. 1 is the high_voltage isolation sample circuit structure for new-energy automobile DC-DC converter that this utility model is provided
Schematic diagram.
In figure, 1, busbar voltage attenuation filter module；2nd, V/F modular converters；3rd, Phototube Coupling transport module；4th, waveform is whole
Shape filtration module.
Specific embodiment
In order that technological means, creation characteristic, reached purpose and effect that this utility model is realized are easy to understand, under
Face combines and is specifically illustrating, and this utility model is expanded on further.
In description of the present utility model, it is to be understood that term " longitudinal direction ", " radial direction ", " length ", " width ", " thickness
Degree ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", the side of the instruction such as " outward "
Position or position relationship are, based on orientation shown in the drawings or position relationship, to be for only for ease of description this utility model and simplification is retouched
State, rather than indicate or imply indication device or element must have specific orientation, with specific azimuth configuration and operation,
Therefore it is not intended that to restriction of the present utility model.In description of the present utility model, unless otherwise stated, " multiple " contain
Justice is two or more.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited, term " peace
Dress ", " being connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or integratedly
Connection；Can be mechanically connected, or electrically connect；Can be joined directly together, it is also possible to be indirectly connected to by intermediary,
It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
Concrete meaning of the language in this utility model.
Refer to shown in Fig. 1, this utility model provides a kind of high_voltage isolation for new-energy automobile DC-DC converter and adopts
Sample circuit, including the busbar voltage attenuation filter module 1, V/F modular converters 2, Phototube Coupling transport module 3 and the ripple that are linked in sequence
Shape shaping filter module 4；Wherein, the busbar voltage attenuation filter module 1 is suitable to the mother to new-energy automobile DC-DC converter
Line high pressure exports DC voltage after carrying out attenuation filter, the V/F modular converters 2 are suitable to busbar voltage attenuation filter module 1
The DC voltage of output carries out output frequency signal after V/F conversions, and the Phototube Coupling transport module 3 is suitable to V/F moduluss of conversion
The frequency signal that block 2 is exported after changing carries out Phototube Coupling transmission, and the waveform shaping filtration module 4 is suitable to pass Phototube Coupling
The frequency signal of the transmission of defeated module 3 carries out outputting standard square-wave signal after shaping filter.
As specific embodiment, refer to shown in Fig. 1, the busbar voltage attenuation filter module 1 includes resistance R28, electricity
Resistance 29, resistance R33, electric capacity C29 and electric capacity C30, one end of the resistance R28 are connected with the positive voltage Vin++ of busbar voltage, institute
The other end for stating resistance R28 is connected jointly with one end of resistance 29, resistance R33 and electric capacity C29, the resistance R33 and electric capacity C29
The other end and one end of electric capacity C30 be connected with the negative voltage Vin-- of busbar voltage, the resistance 29 and electric capacity C30's is another
One end is commonly connected to V/F modular converters 2.
As specific embodiment, refer to shown in Fig. 1, the V/F modular converters 2 include resistance R20, resistance R45, resistance
R46, resistance R47, electric capacity C15, electric capacity C28, electric capacity C38 and V/F conversion chip U5, one end and the bus electricity of the electric capacity C15
The negative voltage Vin-- connections of pressure, the other end of the electric capacity C15 and one end of resistance R20, the 8th foot of V/F conversion chip U5 and
Supply voltage P5V connects, and the other end of the resistance R20 is connected with one end of the 5th foot and electric capacity C28 of V/F conversion chip U5,
The other end of the electric capacity C28 is connected with the negative voltage Vin-- of busbar voltage, the 7th foot and bus of the V/F conversion chips U5
The outfan connection of voltage attenuation filtration module, i.e., with resistance 29 in the busbar voltage attenuation filter module 1 and electric capacity C30
The other end connects, and the 1st foot and electric capacity C38, one end of resistance R47 and resistance R45 and the V/F of the V/F conversion chips U5 turn
The 6th foot connection of chip U5 is changed, one end of the resistance R46 is connected with the 2nd foot of V/F conversion chip U5, the resistance R46,
Negative voltage of 4th foot of electric capacity C38, the other end of resistance R47 and resistance R45 and V/F conversion chip U5 with busbar voltage
Vin-- connects, and the 3rd foot of the V/F conversion chips U5 is connected to Phototube Coupling transport module 3.Wherein, the V/F changes core
Special chips of the piece U5 for V/F modular converters 2, used as a kind of embodiment, the V/F conversion chips U5 adopts model
The chip of LM231N.
Used as specific embodiment, model 103COG of the electric capacity C28 and electric capacity C38, the material of the model is COG,
The capacitance temperature drift very little of the material, about 30ppm, therefore temperature drift can be reduced to below 60ppm by the application, it is ensured that
The low temperature of whole circuit floats.
As specific embodiment, refer to shown in Fig. 1, the Phototube Coupling transport module 3 includes resistance R25, resistance
R39, resistance L5, optocoupler PC1, electric capacity C26 and electric capacity C33, one end of the resistance R25 are connected with supply voltage P5V, the electricity
One end of the other end and electric capacity C26 of resistance R25 is connected with the input positive terminal of optocoupler PC1, the other end and optocoupler of the electric capacity C26
The input negative terminal of PC1 and the connection of V/F modular converters, i.e., connected with the 3rd foot of V/F conversion chip U5 in the V/F modular converters 2
Connect, one end connection 3.3V DC voltages of the resistance L5, the other end of the resistance L5 are connected with the output plus terminal of optocoupler PC1
Connect, one end of the resistance capacitance C33 and resistance R39 is connected with the output negative terminal of optocoupler PC1, the resistance capacitance C33 and electricity
The other end ground connection of resistance R39, and the output positive and negative terminal of the optocoupler PC1 is connected to waveform shaping filtration module 4.As a kind of real
Apply mode, photoelectric isolating devices of the optocoupler PC1 using model PC817C.
As specific embodiment, refer to shown in Fig. 1, the waveform shaping filtration module 4 includes resistance R34, resistance
R40, resistance R22, resistance R30, electric capacity C16, electric capacity C34, electric capacity C35 and audion Q11, the electric capacity C16's and resistance R22
One end is connected with the output plus terminal of optocoupler PC1, the other end of electric capacity C16 ground connection, one end of the resistance R34 and optocoupler
The output negative terminal connection of PC1, the other end of the resistance R34 are connected with the base stage of one end of resistance R40 and audion Q11, institute
The other end for stating resistance R22 is connected with one end of resistance R30 and electric capacity C34 and the colelctor electrode of audion Q11, the resistance R30
The other end and electric capacity C35 one end connection and as the outfan of whole high_voltage isolation sample circuit, i.e., described waveform shaping
Square-wave signal after 4 shaping filter of filtration module from C point outputting standards carries out frequency sampling to follow-up DSP single-chip microcomputers, described
The emitter stage of resistance R40, the other end of electric capacity C34 and electric capacity C35 and audion Q11 is grounded.
Compared with prior art, the high_voltage isolation for new-energy automobile DC-DC converter that this utility model is provided is adopted
Sample circuit, including the busbar voltage attenuation filter module, V/F modular converters, Phototube Coupling transport module and the waveform that are linked in sequence
Shaping filter module, the bus high pressure of its DC-DC converter export direct current Jing after busbar voltage attenuation filter module attenuation filter
Voltage, the DC voltage are sent into V/F modular converters and carry out output frequency signal after V/F conversions, the frequency signal through photoelectricity every
After transport module isolation transmission, then shaping filter, the square-wave signal of last outputting standard are carried out by waveform shaping filtration module
Frequency sampling is carried out to DSP single-chip microcomputers, corresponding busbar voltage is calculated by frequency values.The application by V/F modular converters into
Work(is used in busbar voltage high_voltage isolation sample circuit, carries out high_voltage isolation collection institute in efficiently solving prior art with optocoupler
The very big technical problem of the temperature drift that brings, thus the temperature stability of high_voltage isolation sample circuit that the application is provided is very
Good, reliability is high, and low cost.
Finally illustrate, above example is only unrestricted to illustrate the technical solution of the utility model, although ginseng
This utility model is described in detail according to preferred embodiment, it will be understood by those within the art that, can be to this
The technical scheme of utility model is modified or equivalent, without deviating from the objective and model of technical solutions of the utility model
Enclose, which all should be covered in the middle of right of the present utility model.
Claims (6)
1. the high_voltage isolation sample circuit of new-energy automobile DC-DC converter is used for, it is characterised in that including the mother being linked in sequence
Line voltage attenuation filter module, V/F modular converters, Phototube Coupling transport module and waveform shaping filtration module；Wherein, the mother
Line voltage attenuation filter module exports direct current after being suitable to carry out attenuation filter to the bus high pressure of new-energy automobile DC-DC converter
Voltage, the V/F modular converters are suitable to the DC voltage of busbar voltage attenuation filter module output is carried out to export after V/F conversions
Frequency signal, the Phototube Coupling transport module be suitable to change V/F modular converters after the frequency signal that exports carry out photoelectricity every
From transmission, the waveform shaping filtration module is suitable to carry out after shaping filter the frequency signal of Phototube Coupling transport module transmission
Outputting standard square-wave signal.
2. the high_voltage isolation sample circuit for new-energy automobile DC-DC converter according to claim 1, its feature exist
In the busbar voltage attenuation filter module includes resistance R28, resistance 29, resistance R33, electric capacity C29 and electric capacity C30, the electricity
One end of resistance R28 is connected with the positive voltage Vin++ of busbar voltage, the other end of the resistance R28 and resistance 29, resistance R33 and
One end of electric capacity C29 connects jointly, one end and the busbar voltage of the other end and electric capacity C30 of the resistance R33 and electric capacity C29
Negative voltage Vin-- connections, the other end of the resistance 29 and electric capacity C30 is commonly connected to V/F modular converters.
3. the high_voltage isolation sample circuit for new-energy automobile DC-DC converter according to claim 1, its feature exist
In the V/F modular converters include resistance R20, resistance R45, resistance R46, resistance R47, electric capacity C15, electric capacity C28, electric capacity C38
With V/F conversion chip U5, one end of the electric capacity C15 is connected with the negative voltage Vin-- of busbar voltage, and the electric capacity C15's is another
One end of one end and resistance R20, the 8th foot of V/F conversion chip U5 and supply voltage P5V are connected, the other end of the resistance R20
It is connected with one end of the 5th foot and electric capacity C28 of V/F conversion chip U5, the other end of the electric capacity C28 and the negative electricity of busbar voltage
Pressure Vin-- connections, the 7th foot of the V/F conversion chips U5 are connected with the outfan of busbar voltage attenuation filter module, the V/
1st foot of F conversion chip U5 is connected with the 6th foot of electric capacity C38, one end of resistance R47 and resistance R45 and V/F conversion chip U5
Connect, one end of the resistance R46 is connected with the 2nd foot of V/F conversion chip U5, the resistance R46, electric capacity C38, resistance R47 and
4th foot of the other end and V/F conversion chip U5 of resistance R45 is connected with the negative voltage Vin-- of busbar voltage, the V/F
3rd foot of conversion chip U5 is connected to Phototube Coupling transport module.
4. the high_voltage isolation sample circuit for new-energy automobile DC-DC converter according to claim 3, its feature exist
In model 103COG of the electric capacity C28 and electric capacity C38.
5. the high_voltage isolation sample circuit for new-energy automobile DC-DC converter according to claim 1, its feature exist
In the Phototube Coupling transport module includes resistance R25, resistance R39, resistance L5, optocoupler PC1, electric capacity C26 and electric capacity C33, institute
The one end for stating resistance R25 is connected with supply voltage P5V, one end and the optocoupler PC1 of the other end and electric capacity C26 of the resistance R25
Input positive terminal connection, the other end of the electric capacity C26 is connected with the input negative terminal of optocoupler PC1 and V/F modular converters, the electricity
One end connection 3.3V DC voltages of resistance L5, the other end of the resistance L5 are connected with the output plus terminal of optocoupler PC1, the resistance
One end of electric capacity C33 and resistance R39 is connected with the output negative terminal of optocoupler PC1, and the resistance capacitance C33's and resistance R39 is another
End ground connection, and the output positive and negative terminal of the optocoupler PC1 is connected to waveform shaping filtration module.
6. the high_voltage isolation sample circuit for new-energy automobile DC-DC converter according to claim 5, its feature exist
In the waveform shaping filtration module includes resistance R34, resistance R40, resistance R22, resistance R30, electric capacity C16, electric capacity C34, electricity
Hold C35 and audion Q11, one end of the electric capacity C16 and resistance R22 is connected with the output plus terminal of optocoupler PC1, the electric capacity
The other end ground connection of C16, one end of the resistance R34 are connected with the output negative terminal of optocoupler PC1, the other end of the resistance R34
It is connected with one end of resistance R40 and the base stage of audion Q11, the other end of the resistance R22 is with resistance R30's and electric capacity C34
The colelctor electrode connection of one end and audion Q11, one end connection of the other end and electric capacity C35 of the resistance R30 is simultaneously as whole
The outfan of high_voltage isolation sample circuit, the other end and audion Q11 of the resistance R40, electric capacity C34 and electric capacity C35 send out
Emitter-base bandgap grading is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621217608.0U CN206146995U (en) | 2016-11-10 | 2016-11-10 | Do you be used for new energy automobile DC high voltage isolation sampling circuit of DC converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621217608.0U CN206146995U (en) | 2016-11-10 | 2016-11-10 | Do you be used for new energy automobile DC high voltage isolation sampling circuit of DC converter |
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| CN206146995U true CN206146995U (en) | 2017-05-03 |
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ID=58626769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201621217608.0U Active CN206146995U (en) | 2016-11-10 | 2016-11-10 | Do you be used for new energy automobile DC high voltage isolation sampling circuit of DC converter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317467A (en) * | 2017-08-08 | 2017-11-03 | 北京金风科创风电设备有限公司 | Drive control system of power electronic power module and energy-taking power supply thereof |
| CN109752668A (en) * | 2018-12-06 | 2019-05-14 | 兰州空间技术物理研究所 | A kind of negative pressure output DC/DC converter with positive pressure telemetering |
| CN114487584A (en) * | 2022-02-18 | 2022-05-13 | 中国工程物理研究院流体物理研究所 | Bipolar direct-current high-voltage isolation sampling circuit |
-
2016
- 2016-11-10 CN CN201621217608.0U patent/CN206146995U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107317467A (en) * | 2017-08-08 | 2017-11-03 | 北京金风科创风电设备有限公司 | Drive control system of power electronic power module and energy-taking power supply thereof |
| CN109752668A (en) * | 2018-12-06 | 2019-05-14 | 兰州空间技术物理研究所 | A kind of negative pressure output DC/DC converter with positive pressure telemetering |
| CN114487584A (en) * | 2022-02-18 | 2022-05-13 | 中国工程物理研究院流体物理研究所 | Bipolar direct-current high-voltage isolation sampling circuit |
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