CN108323185A - A kind of input voltage signal sample circuit in three-phase three-wire system pfc circuit - Google Patents
A kind of input voltage signal sample circuit in three-phase three-wire system pfc circuit Download PDFInfo
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- CN108323185A CN108323185A CN201780002506.8A CN201780002506A CN108323185A CN 108323185 A CN108323185 A CN 108323185A CN 201780002506 A CN201780002506 A CN 201780002506A CN 108323185 A CN108323185 A CN 108323185A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/30—Structural combination of electric measuring instruments with basic electronic circuits, e.g. with amplifier
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/04—Voltage dividers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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Abstract
A kind of input voltage signal sample circuit in three-phase three-wire system pfc circuit, the input voltage signal sampling module (200) of input voltage signal sampling module (100), the second phase including the first phase and the input voltage signal sampling module (300) of third phase, wherein：The input voltage signal sampling module (100) of first phase includes the first reference ground setting circuit (101), the first bleeder circuit (102), the second bleeder circuit (103), the first operational amplifier (104) and the first output circuit (105)；The input voltage signal sampling module (200) of second phase includes the second reference ground setting circuit (201), third bleeder circuit (202), the 4th bleeder circuit (203), second operational amplifier (204) and the second output circuit (205)；The input voltage signal sampling module (300) of third phase includes third reference ground setting circuit (301), the 5th bleeder circuit (302), the 6th bleeder circuit (303), third operational amplifier (304) and third output circuit (305).The input voltage signal sample circuit can acquire the input voltage signal in three-phase three-wire system pfc circuit there is no center line.
Description
Technical field
The present invention relates to electronic circuit technology fields, and in particular to the input voltage in a kind of three-phase three-wire system pfc circuit
Signal sample circuit.
Background technology
Currently, country is carrying forward vigorously charging infrastructure construction, and Three-phase high-power charger is to realize that ground is filled
A solution of electric installation.In general, Three-phase high-power charger is generally divided into two parts：Prime Active PFC
(Power F actor Correction, PFC) and rear class DC power supply DCDC.Wherein, prime PFC is under the conditions of three-phase input
Active power factor correction circuit, by active circuit (such as active circuits) control switching device so that input current waveform is followed
Input voltage waveform reduces reactive current, line loss, improves the mesh of grid supply quality to reach raising power factor
's.
For the input AC AC voltage waveforms sampling in common three-phase four-wire system pfc circuit, first can directly acquire
The voltage signal for inputting phase line VINA, VINB, VINC, then compares with center line VINN, you can obtain each phase line successively again
AC voltage waveforms OUT_A, OUT_B, OUT_C.However found in putting into practice, many equipment are not no center lines, such as：Engine.
If center line is not present in circuit, above-mentioned existing sample mode can not just collect input voltage signal.As it can be seen that how
There is no center line, the input voltage signal acquired in pfc circuit is a technical task urgently to be resolved hurrily.
Invention content
The embodiment of the present invention provides the input voltage signal sample circuit in a kind of three-phase three-wire system pfc circuit, Ke Yi
In the case of center line, the input voltage signal in three-phase three-wire system pfc circuit is acquired.
An embodiment of the present invention provides the input voltage signal sample circuits in a kind of three-phase three-wire system pfc circuit, including
Input voltage signal sampling module, the input voltage signal sampling module of the second phase and the input voltage of third phase of first phase
Signal sampling module, wherein：
The input voltage signal sampling module of first phase include the first reference ground setting circuit, the first bleeder circuit,
Second bleeder circuit, the first operational amplifier and the first output circuit；The input terminal of the first reference ground setting circuit connects
The input terminal of first bleeder circuit is connect, the output end of the first reference ground setting circuit connects second bleeder circuit
Output end, the output end of first bleeder circuit connects the positive input of first operational amplifier, described first
The output end of operational amplifier is all connected with the input terminal of second bleeder circuit and first output circuit, and described
The reverse input end of one operational amplifier is connect with second bleeder circuit；Virtual one of circuit is arranged in first reference ground
The input voltage signal of ground wire, the reference ground for being sampled as the input voltage signal of first phase, first phase passes
The input terminal for transporting to first bleeder circuit divides through first bleeder circuit, is converted into the first low-voltage signal, and described the
The output end of one bleeder circuit exports first low-voltage signal to the positive input of first operational amplifier, through described
After the amplification of first operational amplifier, the first output voltage signal is obtained, described in the output end output of first operational amplifier
First outputs voltage signal to the input terminal of the input terminal of first output circuit and second bleeder circuit, and described
One output voltage signal is divided through second bleeder circuit, is obtained and institute in the reverse input end of first operational amplifier
The matched signal of the first output voltage signal is stated, the output end of first output circuit exports the first output voltage letter
Number, it is sampled with the input voltage signal to first phase；
The input voltage signal sampling module of second phase include the second reference ground setting circuit, third bleeder circuit,
4th bleeder circuit, second operational amplifier and the second output circuit；The input terminal of the second reference ground setting circuit connects
The input terminal of the third bleeder circuit is connect, the output end of the second reference ground setting circuit connects the 4th bleeder circuit
Output end, the output end of the third bleeder circuit connects the positive input of the second operational amplifier, described second
The output end of operational amplifier is all connected with the input terminal of the 4th bleeder circuit and second output circuit, and described
The reverse input end of two operational amplifiers is connect with the 4th bleeder circuit；Virtual one of circuit is arranged in second reference ground
The input voltage signal of ground wire, the reference ground for being sampled as the input voltage signal of second phase, second phase passes
The input terminal for transporting to the third bleeder circuit divides through the third bleeder circuit, is converted into the second low-voltage signal, and described the
The output end of three bleeder circuits exports second low-voltage signal to the positive input of the second operational amplifier, through described
After second operational amplifier amplification, the second output voltage signal is obtained, described in the output end output of the second operational amplifier
Second outputs voltage signal to the input terminal of the input terminal of second output circuit and the 4th bleeder circuit, and described
Two output voltage signals are divided through the 4th bleeder circuit, are obtained and institute in the reverse input end of the second operational amplifier
The matched signal of the second output voltage signal is stated, the output end of second output circuit exports the second output voltage letter
Number, it is sampled with the input voltage signal to second phase；
The input voltage signal sampling module of the third phase include third reference ground setting circuit, the 5th bleeder circuit,
6th bleeder circuit, third operational amplifier and third output circuit；The input terminal of the third reference ground setting circuit connects
The input terminal of the 5th bleeder circuit is connect, the output end of the third reference ground setting circuit connects the 6th bleeder circuit
Output end, the output end of the 5th bleeder circuit connects the positive input of the third operational amplifier, the third
The output end of operational amplifier is all connected with the input terminal of the 6th bleeder circuit and the third output circuit, and described
The reverse input end of three operational amplifiers is connect with the 6th bleeder circuit；Virtual one of circuit is arranged in the third reference ground
The input voltage signal of ground wire, the reference ground for being sampled as the input voltage signal of the third phase, the third phase passes
The input terminal for transporting to the 5th bleeder circuit divides through the 5th bleeder circuit, is converted into third low-voltage signal, and described the
The output end of five bleeder circuits exports the third low-voltage signal to the positive input of the third operational amplifier, through described
After the amplification of third operational amplifier, third output voltage signal is obtained, described in the output end output of the third operational amplifier
Third outputs voltage signal to the input terminal of the third output circuit and the input terminal of the 6th bleeder circuit, and described
Three output voltage signals are divided through the 6th bleeder circuit, are obtained and institute in the reverse input end of the third operational amplifier
The matched signal of third output voltage signal is stated, the output end of the third output circuit exports the third output voltage letter
Number, it is sampled with the input voltage signal to the third phase.
Wherein, the first reference ground setting circuit includes the first capacitance and first resistor, first bleeder circuit
Including second resistance and 3rd resistor, second bleeder circuit includes the 4th resistance and the 5th resistance, the first output electricity
Road includes the 6th resistance, wherein：
The first end of first capacitance connects with the first end of the first resistor, the first end of the second resistance
It connects, the second end of first capacitance and the second end of the second end of the first resistor, the 5th resistance are all connected with, described
The second end of first resistor is connect with the second end of the 5th resistance and the first resistor connect with the 5th resistance
Point connects the reference ground that the first reference ground setting circuit fictionalizes, the second end of the second resistance and the 3rd resistor
First end, first operational amplifier positive input be all connected with, the positive input of first operational amplifier is also
The first end of the 3rd resistor is connected to first voltage, the output end of first operational amplifier and the 4th resistance
First end, the first end of the 6th resistance are all connected with, second end and first operational amplifier of the 4th resistance
Reverse input end, the 5th resistance first end be all connected with.
Wherein, the input voltage signal sampling module of first phase further includes the second capacitance, third capacitance, the 4th capacitance
And the 5th capacitance, wherein：
The first end of second capacitance is connect with the first end of the 4th resistance, the second end of second capacitance with
The second end of 4th resistance connects, and the first end of the third capacitance is connect with the first end of the 5th resistance, described
The second end of the second end of third capacitance and the second resistance, the first end of the 4th capacitance and the 3rd resistor
First end is all connected with, and the second end of the 4th capacitance is connect with the second end of the 3rd resistor, and the of the 5th capacitance
One end is connect with the second end of the 6th resistance, the second end ground connection of the 5th capacitance.
Wherein, the first voltage is 1.5V, and the resistance value of the 5th resistance is far longer than the electricity of the 4th resistance
Resistance value, first output voltage signal is identical as the phase of input voltage signal of the first phase, and first output
The amplitude of voltage signal is less than the amplitude of the input voltage signal of first phase.
Wherein, the second reference ground setting circuit includes the 6th capacitance and the 7th resistance, the third bleeder circuit
Including the 8th resistance and the 9th resistance, the 4th bleeder circuit includes the tenth resistance and eleventh resistor, second output
Circuit includes twelfth resistor, wherein：
The first end of 6th capacitance connects with the first end of the 7th resistance, the first end of the 8th resistance
It connects, the second end of the 6th capacitance is all connected with second end, the second end of the eleventh resistor of the 7th resistance, institute
The second end for stating the 7th resistance is connect with the second end of the eleventh resistor and the 7th resistance and the eleventh resistor
The point of connection connects the reference ground that the second reference ground setting circuit fictionalizes, the second end and the described 9th of the 8th resistance
The first end of resistance, the second operational amplifier positive input be all connected with, the second operational amplifier forward direction it is defeated
Enter and holds the first end for being also connected with the 9th resistance to second voltage, the output end of the second operational amplifier and the described tenth
The first end of resistance, the first end of the twelfth resistor are all connected with, second end and second operation of the tenth resistance
The reverse input end of amplifier, the eleventh resistor first end be all connected with.
Wherein, the input voltage signal sampling module of second phase further includes the 7th capacitance, the 8th capacitance, the 9th capacitance
And the tenth capacitance, wherein：
The first end of 7th capacitance is connect with the first end of the tenth resistance, the second end of the 7th capacitance with
The second end of tenth resistance connects, and the first end of the 8th capacitance is connect with the first end of the eleventh resistor, institute
State the second end of the 8th capacitance and second end of the 8th resistance, the first end of the 9th capacitance and the 9th resistance
First end be all connected with, the second end of the 9th capacitance is connect with the second end of the 9th resistance, the tenth capacitance
First end is connect with the second end of the twelfth resistor, the second end ground connection of the tenth capacitance.
Wherein, the second voltage is 1.5V, and the resistance value of the eleventh resistor is far longer than the tenth resistance
Resistance value, second output voltage signal is identical as the phase of input voltage signal of the second phase, and described second defeated
Go out voltage signal amplitude be less than second phase input voltage signal amplitude.
Wherein, the third reference ground setting circuit includes the 11st capacitance and thirteenth resistor, the 5th partial pressure
Circuit includes the 14th resistance and the 15th resistance, and the 6th bleeder circuit includes the 16th resistance and the 17th resistance, institute
It includes the 18th resistance to state third output circuit, wherein：
The first end of 11st capacitance and the first end of the thirteenth resistor, the first end of the 14th resistance
It is all connected with, the second end of the 11st capacitance and the second end of the thirteenth resistor, the second end of the 17th resistance
It is all connected with, the second end of the thirteenth resistor is connect with the second end of the 17th resistance and the thirteenth resistor and institute
The point for stating the connection of the 17th resistance connects the reference ground that third reference ground setting circuit fictionalizes, and the of the 14th resistance
Two ends are all connected with the first end of the 15th resistance, the positive input of the third operational amplifier, the third fortune
The positive input for calculating amplifier is also connected with the first end of the 15th resistance to tertiary voltage, the third operational amplifier
Output end be all connected with the first end of the 16th resistance, the first end of the 18th resistance, the 16th resistance
Second end be all connected with the reverse input end of the third operational amplifier, the first end of the 17th resistance.
Wherein, the input voltage signal sampling module of the third phase further includes the 12nd capacitance, the 13rd capacitance, the tenth
Four capacitances and the 15th capacitance, wherein：
The first end of 12nd capacitance is connect with the first end of the 16th resistance, and the of the 12nd capacitance
Two ends are connect with the second end of the 16th resistance, the first end of the 13rd capacitance and the first of the 17th resistance
End connection, the second end of the 13rd capacitance and the second end of the 14th resistance, the first end of the 14th capacitance
And the first end of the 15th resistance is all connected with, the second end of the 14th capacitance and the second of the 15th resistance
End connection, the first end of the 15th capacitance connect with the second end of the 18th resistance, and the of the 15th capacitance
Two ends are grounded.
Wherein, the tertiary voltage is 1.5V, and the resistance value of the 17th resistance is far longer than the 16th resistance
Resistance value, the third output voltage signal is identical as the phase of the input voltage signal of the third phase, and the third
The amplitude of output voltage signal is less than the amplitude of the input voltage signal of the third phase.
In the embodiment of the present invention, the input voltage signal sample circuit in three-phase three-wire system pfc circuit includes the first phase
The input voltage signal of input voltage signal sampling module, the input voltage signal sampling module of the second phase and third phase samples
Module, wherein the input voltage signal sampling module of first phase includes the first reference ground setting circuit, the first partial pressure electricity
The input voltage signal of road, the second bleeder circuit, the first operational amplifier and the first output circuit, second phase samples mould
Block includes the second reference ground setting circuit, third bleeder circuit, the 4th bleeder circuit, second operational amplifier and the second output
The input voltage signal sampling module of circuit, the third phase includes third reference ground setting circuit, the 5th bleeder circuit, the 6th
Bleeder circuit, third operational amplifier and third output circuit.The input voltage signal sampling module of first phase passes through
Circuit, the first bleeder circuit, the second bleeder circuit, the first operational amplifier and the first output circuit pair is arranged in first reference ground
The input voltage signal of first phase is sampled, and the input voltage signal sampling module of second phase is set by the second reference ground
The input of circuits, third bleeder circuit, the 4th bleeder circuit, second operational amplifier and second the second phase of output circuit pair
Voltage signal is sampled, and circuit, the 5th is arranged by third reference ground in the input voltage signal sampling module of the third phase
Bleeder circuit, the 6th bleeder circuit, third operational amplifier and third output circuit to the input voltage signal of third phase into
Row sampling, so as to reality there are no center line in the case of, acquire three-phase three-wire system pfc circuit in input voltage letter
Number.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
Fig. 1 is the input voltage signal sample circuit in a kind of three-phase three-wire system pfc circuit disclosed by the embodiments of the present invention
Structural schematic diagram；
Fig. 2 is the input voltage signal sampling electricity in another three-phase three-wire system pfc circuit disclosed by the embodiments of the present invention
The structural schematic diagram on road；
Fig. 3 is the input voltage signal sampling electricity in another three-phase three-wire system pfc circuit disclosed by the embodiments of the present invention
The structural schematic diagram on road；
Fig. 4 is the input voltage signal sampling electricity in another three-phase three-wire system pfc circuit disclosed by the embodiments of the present invention
The structural schematic diagram on road；
Fig. 5 is the contrast schematic diagram of a kind of input voltage waveform and output voltage waveforms disclosed by the embodiments of the present invention.
Specific implementation mode
Below in conjunction with the attached drawing in embodiment of the present invention, the technical solution in embodiment of the present invention is carried out clear
Chu is fully described by.Obviously, described embodiment is a part of embodiment of the present invention, rather than whole embodiment party
Formula.Based on the embodiment in the present invention, those of ordinary skill in the art are obtained without making creative work
The every other embodiment obtained, should all belong to the scope of protection of the invention.
The embodiment of the present invention provides the input voltage signal sample circuit in a kind of three-phase three-wire system pfc circuit, Ke Yi
In the case of center line, the input voltage signal in three-phase three-wire system pfc circuit is acquired.It carries out individually below specifically
It is bright.
Referring to Fig. 1, Fig. 1 is the input voltage letter in a kind of three-phase three-wire system pfc circuit disclosed by the embodiments of the present invention
The structural schematic diagram of number sample circuit.As shown in Figure 1, the input in three-phase three-wire system pfc circuit described in the present embodiment
Voltage signal sampling circuit includes the input voltage signal sampling of the input voltage signal sampling module 100 of the first phase, the second phase
The input voltage signal sampling module 300 of module 200 and third phase, wherein：
The input voltage signal sampling module 100 of first phase includes the first reference ground setting circuit 101, the first bleeder circuit
102, the second bleeder circuit 103, the first operational amplifier 104 and the first output circuit 105；The first reference ground setting electricity
The input terminal on road 101 connects the input terminal of first bleeder circuit 102, the output of the first reference ground setting circuit 101
End connects the output end of second bleeder circuit 103, and the output end of first bleeder circuit 102 connects first operation
The positive input of amplifier 104 (i.e. U1A), the output end of first operational amplifier 104 (i.e. U1A) with described second point
The input terminal of volt circuit 103 and first output circuit 105 are all connected with, first operational amplifier 104 (i.e. U1A)
Reverse input end is connect with second bleeder circuit 103；101 virtual ground wires of circuit are arranged in first reference ground, use
In the reference ground DGND of the input voltage signal VIN A samplings as first phase, the input voltage signal of first phase
VIN A are transmitted to the input terminal of first bleeder circuit 102, are divided through first bleeder circuit 102, it is low to be converted into first
Signal, the output end of first bleeder circuit 102 is pressed to export first low-voltage signal to first operational amplifier 104
The positive input of (i.e. U1A) obtains the first output voltage letter after first operational amplifier 104 (i.e. U1A) amplification
Number, the output end of first operational amplifier 104 (i.e. U1A) exports the first output voltage signal OUT_A to described the
The input terminal of the input terminal of one output circuit 105 and second bleeder circuit 103, the first output voltage signal OUT_
A is divided through second bleeder circuit 103, is obtained and institute in the reverse input end of first operational amplifier 104 (i.e. U1A)
State the first matched signals of output voltage signal OUT_A, output end output first output of first output circuit 105
Voltage signal OUT_A is sampled with the input voltage signal VIN A to first phase；
The input voltage signal sampling module 200 of second phase includes the second reference ground setting circuit 201, third bleeder circuit
202, the 4th bleeder circuit 203, second operational amplifier 204 and the second output circuit 205；The second reference ground setting electricity
The input terminal on road 201 connects the input terminal of the third bleeder circuit 202, the output of the second reference ground setting circuit 201
End connects the output end of the 4th bleeder circuit 203, and the output end of the third bleeder circuit 202 connects second operation
The positive input of amplifier 204 (i.e. U1B), the output end of the second operational amplifier 204 (i.e. U1B) with described 4th point
The input terminal of volt circuit 203 and second output circuit 205 are all connected with, the second operational amplifier 204 (i.e. U1B)
Reverse input end is connect with the 4th bleeder circuit 203；201 virtual ground wires of circuit are arranged in second reference ground, use
In the reference ground DGND of the input voltage signal VIN B samplings as second phase, the input voltage signal of second phase
VIN B are transmitted to the input terminal of the third bleeder circuit 202, are divided through the third bleeder circuit 202, it is low to be converted into second
Signal, the output end of the third bleeder circuit 202 is pressed to export second low-voltage signal to the second operational amplifier 204
The positive input of (i.e. U1B) obtains the second output voltage letter after the second operational amplifier 204 (i.e. U1B) amplification
Number, the output end of the second operational amplifier 204 (i.e. U1B) exports the second output voltage signal OUT_B to described the
The input terminal of the input terminal of two output circuits 205 and the 4th bleeder circuit 203, the second output voltage signal OUT_
B is divided through the 4th bleeder circuit 203, is obtained and institute in the reverse input end of the second operational amplifier 204 (i.e. U1B)
State the second matched signals of output voltage signal OUT_B, output end output second output of second output circuit 205
Voltage signal OUT_B is sampled with the input voltage signal VIN B to second phase；
The input voltage signal sampling module 300 of third phase includes third reference ground setting circuit 301, the 5th bleeder circuit
302, the 6th bleeder circuit 303, third operational amplifier 304 and third output circuit 305；The third reference ground setting electricity
The input terminal on road 301 connects the input terminal of the 5th bleeder circuit 302, the output of the third reference ground setting circuit 301
End connects the output end of the 6th bleeder circuit 303, and the output end of the 5th bleeder circuit 302 connects the third operation
The positive input of amplifier 304 (i.e. U1C), the output end of the third operational amplifier 304 (i.e. U1C) with described 6th point
The input terminal of volt circuit 303 and the third output circuit 305 are all connected with, the third operational amplifier 304 (i.e. U1C)
Reverse input end is connect with the 6th bleeder circuit 303；301 virtual ground wires of circuit are arranged in the third reference ground, use
In the reference ground DGND of the input voltage signal VIN C samplings as the third phase, the input voltage signal of the third phase
VIN C are transmitted to the input terminal of the 5th bleeder circuit 302, are divided through the 5th bleeder circuit 302, it is low to be converted into third
Signal, the output end of the 5th bleeder circuit 302 is pressed to export the third low-voltage signal to the third operational amplifier 304
The positive input of (i.e. U1C) obtains third output voltage letter after the third operational amplifier 304 (i.e. U1C) amplification
Number, the output end of the third operational amplifier 304 (i.e. U1C) exports the third output voltage signal OUT_C to described the
The input terminal of the input terminal of three output circuits 305 and the 6th bleeder circuit 303, the third output voltage signal OUT_
C is divided through the 6th bleeder circuit 303, is obtained and institute in the reverse input end of the third operational amplifier 304 (i.e. U1C)
The matched signals of third output voltage signal OUT_C are stated, the output end of the third output circuit 305 exports the third output
Voltage signal OUT_C is sampled with the input voltage signal VIN C to the third phase.
In the embodiment of the present invention, the input voltage signal sample circuit in three-phase three-wire system pfc circuit includes the first phase
The input voltage of input voltage signal sampling module 100, the input voltage signal sampling module 200 of the second phase and third phase is believed
Number sampling module 300, wherein the input voltage signal sampling module 100 of first phase includes that circuit is arranged in the first reference ground
101, the first bleeder circuit 102, the second bleeder circuit 103, the first operational amplifier 104 and the first output circuit 105, it is described
The input voltage signal sampling module 200 of second phase includes the second reference ground setting circuit 201, third bleeder circuit the 202, the 4th
Bleeder circuit 203, second operational amplifier 204 and the second output circuit 205, the input voltage signal sampling of the third phase
Module 300 includes third reference ground setting circuit 301, the 5th bleeder circuit 302, the 6th bleeder circuit 303, third operation amplifier
Device 304 and third output circuit 305.The input voltage signal sampling module 100 of first phase is set by the first reference ground
Circuits 101, the first bleeder circuit 102, the second bleeder circuit 103, the first operational amplifier 104 and the first output circuit
The input voltage signal of 105 pair of first phase samples, and the input voltage signal sampling module 200 of second phase passes through second
It is defeated that circuit 201, third bleeder circuit 202, the 4th bleeder circuit 203, second operational amplifier 204 and second is arranged in reference ground
Go out circuit 205 to sample the input voltage signal of the second phase, the input voltage signal sampling module 300 of the third phase is logical
Cross third reference ground setting circuit 301, the 5th bleeder circuit 302, the 6th bleeder circuit 303, third operational amplifier 304 and
The case where third output circuit 305 samples the input voltage signal of third phase, and there are no center lines so as to reality
Under, acquire the input voltage signal in three-phase three-wire system pfc circuit.
Optionally, it is in another three-phase three-wire system pfc circuit disclosed by the embodiments of the present invention please also refer to Fig. 2, Fig. 2
Input voltage signal sample circuit structural schematic diagram.As shown in Fig. 2, the three-phase three-wire system PFC described in the present embodiment
In input voltage signal sample circuit in circuit, for the input voltage signal sampling module 100 of the first phase, described
It includes the first capacitance C1 and first resistor R1 that circuit 101, which is arranged, in one reference ground, and first bleeder circuit 102 includes the second electricity
R2 and 3rd resistor R3 is hindered, second bleeder circuit 103 includes the 4th resistance R4 and the 5th resistance R5, the first output electricity
Road 105 includes the 6th resistance R6, wherein：
The first end of the first capacitance C1 and the first end of the first resistor R1, the first end of the second resistance R2
It is all connected with, the second end of the first capacitance C1 and the second end of the first resistor R1, the second end of the 5th resistance R5
It is all connected with, the second end of the first resistor R1 is connect with the second end of the 5th resistance R5 and the first resistor R1 and institute
The point for stating the 5th resistance R5 connections connects the reference ground DGND that the first reference ground setting circuit 101 fictionalizes, second electricity
Hinder the positive input of the second end of R2 and the first end of the 3rd resistor R3, first operational amplifier 104 (i.e. U1A)
It is all connected with, the first end that the positive input of first operational amplifier 104 (i.e. U1A) is also connected with the 3rd resistor R3 arrives
First voltage, the first end of the output end of first operational amplifier 104 (i.e. U1A) and the 4th resistance R4, described the
The first end of six resistance R6 is all connected with, second end and first operational amplifier 104 (i.e. U1A) of the 4th resistance R4
Reverse input end, the 5th resistance R5 first end be all connected with.
Optionally, the input voltage signal sampling module 100 of first phase further includes the second capacitance C2, third capacitance
C3, the 4th capacitance C4 and the 5th capacitance C5, wherein：
The first end of the second capacitance C2 is connect with the first end of the 4th resistance R4, and the of the second capacitance C2
Two ends are connect with the second end of the 4th resistance R4, the first end of the third capacitance C3 and the first of the 5th resistance R5
End connection, the second end of the third capacitance C3 and the second end of the second resistance R2, the first end of the 4th capacitance C4
And the first end of the 3rd resistor R3 is all connected with, the second end of the 4th capacitance C4 and the second of the 3rd resistor R3
End connection, the first end of the 5th capacitance C5 connect with the second end of the 6th resistance R6, and the of the 5th capacitance C5
Two ends are grounded DGND.
Wherein, the first voltage is 1.5V, and the resistance value of the 5th resistance R5 is far longer than the 4th resistance R4
Resistance value, the first output voltage signal OUT_A is identical as the phase of input voltage signal VIN A of first phase,
And the amplitude of the first output voltage signal OUT_A is less than the amplitude of the input voltage signal VIN A of first phase.
Wherein, above-mentioned second capacitance C2, third capacitance C3, the 4th capacitance C4 and the 5th capacitance C5 are decoupling capacitor,
It can be with the High-frequency Interference in filtering circuit.
Optionally, it is in another three-phase three-wire system pfc circuit disclosed by the embodiments of the present invention please also refer to Fig. 3, Fig. 3
Input voltage signal sample circuit structural schematic diagram.Shown in Fig. 3, the three-phase three-wire system PFC electricity described in the present embodiment
In input voltage signal sample circuit in road, for the input voltage signal sampling module 200 of the second phase, described second
It includes the 6th capacitance C6 and the 7th resistance R7 that circuit 201, which is arranged, in reference ground, and the third bleeder circuit 202 includes the 8th resistance
R8 and the 9th resistance R9, the 4th bleeder circuit 203 include the tenth resistance R10 and eleventh resistor R11, second output
Circuit 205 includes twelfth resistor R12, wherein：
The first end of the 6th capacitance C6 and the first end of the 7th resistance R7, the first end of the 8th resistance R8
Be all connected with, the second end of the 6th capacitance C6 and the second end of the 7th resistance R7, the eleventh resistor R11 second
End is all connected with, and the second end of the 7th resistance R7 is connect with the second end of the eleventh resistor R11 and the 7th resistance
R7 meets the reference ground DGND that the second reference ground setting circuit 201 fictionalizes, institute with the eleventh resistor R11 points connecting
State the second end of the 8th resistance R8 and the first end of the 9th resistance R9, the second operational amplifier 204 (i.e. U1B) just
It is all connected with to input terminal, the positive input of the second operational amplifier 204 (i.e. U1B) is also connected with the 9th resistance R9's
First end is to second voltage, the output end of the second operational amplifier 204 (i.e. U1B) and the first of the tenth resistance R10
It holds, the first end of the twelfth resistor R12 is all connected with, second end and second operation amplifier of the tenth resistance R10
The reverse input end of device 204 (i.e. U1B), the eleventh resistor R11 first end be all connected with.
Optionally, the input voltage signal sampling module 200 of second phase further includes the 7th capacitance C7, the 8th capacitance
C8, the 9th capacitance C9 and the tenth capacitance C10, wherein：
The first end of the 7th capacitance C7 is connect with the first end of the tenth resistance R10, the 7th capacitance C7's
Second end is connect with the second end of the tenth resistance R10, first end and the eleventh resistor R11 of the 8th capacitance C8
First end connection, the second end of the 8th capacitance C8 and the second end of the 8th resistance R8, the 9th capacitance C9
First end and the first end of the 9th resistance R9 are all connected with, second end and the 9th resistance R9 of the 9th capacitance C9
Second end connection, the first end of the tenth capacitance C10 connect with the second end of the twelfth resistor R12, the described tenth
The second end of capacitance C10 is grounded DGND.
Wherein, the second voltage is 1.5V, and the resistance value of the eleventh resistor R11 is far longer than the tenth resistance
The resistance value of R10, the phase phase of the second output voltage signal OUT_B and the input voltage signal VIN B of second phase
Together, and the amplitude of the second output voltage signal OUT_B be less than second phase input voltage signal VIN B amplitude.
Wherein, above-mentioned 7th capacitance C7, the 8th capacitance C8, the 9th capacitance C9 and the tenth capacitance C10 are decoupling capacitor,
It can be with the High-frequency Interference in filtering circuit.
Optionally, it is in another three-phase three-wire system pfc circuit disclosed by the embodiments of the present invention please also refer to Fig. 4, Fig. 4
Input voltage signal sample circuit structural schematic diagram.As shown in figure 4, the three-phase three-wire system PFC described in the present embodiment
In input voltage signal sample circuit in circuit, for the input voltage signal sampling module 300 of third phase, described
It includes the 11st capacitance C11 and thirteenth resistor R13 that circuit 301, which is arranged, in three reference grounds, and the 5th bleeder circuit 302 includes
14th resistance R14 and the 15th resistance R15, the 6th bleeder circuit 303 include the 16th resistance R16 and the 17th resistance
R17, the third output circuit 305 include the 18th resistance R18, wherein：
The first end of the 11st capacitance C11 and the first end of the thirteenth resistor R13, the 14th resistance
The first end of R14 is all connected with, the second end of the 11st capacitance C11 and the second end of the thirteenth resistor R13, described the
The second end of 17 resistance R17 is all connected with, the second end of the thirteenth resistor R13 and the second of the 17th resistance R17
End connection and the thirteenth resistor R13 connect the third reference ground with the 17th resistance R17 points connecting and circuit are arranged
The 301 reference ground DGND fictionalized, the second end of the 14th resistance R14 and the first end of the 15th resistance R15, institute
The positive input for stating third operational amplifier 304 (i.e. U1C) is all connected with, and the third operational amplifier 304 (i.e. U1C) is just
The first end of the 15th resistance R15 is also connected with to tertiary voltage to input terminal, and the third operational amplifier 304 is (i.e.
U1C output end) is all connected with the first end of the 16th resistance R16, the first end of the 18th resistance R18, described
Reverse input end, ten seven electricity of the second end of 16th resistance R16 with the third operational amplifier 304 (i.e. U1C)
The first end of resistance R17 is all connected with.
Optionally, the input voltage signal sampling module 300 of the third phase further includes the 12nd capacitance C12, the 13rd
Capacitance C13, the 14th capacitance C14 and the 15th capacitance C15, wherein：
The first end of the 12nd capacitance C12 is connect with the first end of the 16th resistance R16, the 12nd electricity
Hold C12 second end connect with the second end of the 16th resistance R16, the first end of the 13rd capacitance C13 with it is described
The first end of 17th resistance R17 connects, the second end of the 13rd capacitance C13 and the second of the 14th resistance R14
The first end at end, the first end of the 14th capacitance C14 and the 15th resistance R15 is all connected with, the 14th electricity
Hold C14 second end connect with the second end of the 15th resistance R15, the first end of the 15th capacitance C15 with it is described
The second end of 18th resistance R18 connects, and the second end of the 15th capacitance C15 is grounded DGND.
Wherein, above-mentioned 12nd capacitance C12, the 13rd capacitance C13, the 14th capacitance C14 and the 15th capacitance C15 are equal
It, can be with the High-frequency Interference in filtering circuit for decoupling capacitor.
Wherein, the tertiary voltage is 1.5V, and the resistance value of the 17th resistance R17 is far longer than the 16th electricity
Hinder the resistance value of R16, the phase of the third output voltage signal OUT_C and the input voltage signal VIN C of the third phase
It is identical, and the amplitude of the third output voltage signal OUT_C is less than the width of the input voltage signal VIN C of the third phase
Value.
It is a kind of input voltage waveform and output voltage waveforms disclosed by the embodiments of the present invention please also refer to Fig. 5, Fig. 5
Contrast schematic diagram.Wherein, the input voltage signal VIN A and first shown in fig. 5 that can be used for schematically describing the first phase
The comparison of waveform between first output voltage signal OUT_A of phase can be used for the input electricity for schematically describing the second phase
The comparison of waveform, can be used for schematically retouching between pressure signal VIN B and the second output voltage signal OUT_B of the second phase
State the comparison of waveform between the input voltage signal VIN C of third phase and the third output voltage signal OUT_C of third phase.From figure
It can be seen that input voltage signal is identical as output voltage signal phase in 5, and the amplitude of output voltage signal is less than input electricity
Press the amplitude of signal.
It should be noted that the first end of the capacitance in the embodiment of the present invention refers generally to the anode of capacitance, the second of capacitance
End refers generally to the cathode of capacitance, and the first end and second end of resistance is not different.
The input voltage signal sampling electricity being provided for the embodiments of the invention above in a kind of three-phase three-wire system pfc circuit
Road is described in detail, and principle and implementation of the present invention are described for specific case used herein, above
The explanation of embodiment is merely used to help understand the core idea of the present invention；Meanwhile for those of ordinary skill in the art, according to
According to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion the content of the present specification
It should not be construed as limiting the invention.
Claims (10)
1. the input voltage signal sample circuit in a kind of three-phase three-wire system pfc circuit, which is characterized in that including the defeated of the first phase
Enter the input voltage signal sampling mould of voltage signal sampling module, the input voltage signal sampling module of the second phase and third phase
Block, wherein：
The input voltage signal sampling module of first phase includes the first reference ground setting circuit, the first bleeder circuit, second
Bleeder circuit, the first operational amplifier and the first output circuit；The input terminal of the first reference ground setting circuit connects institute
The input terminal of the first bleeder circuit is stated, the output end of the first reference ground setting circuit connects the defeated of second bleeder circuit
Outlet, the output end of first bleeder circuit connect the positive input of first operational amplifier, first operation
The output end of amplifier is all connected with the input terminal of second bleeder circuit and first output circuit, first fortune
The reverse input end for calculating amplifier is connect with second bleeder circuit；The virtual ground of the first reference ground setting circuit
Line, the reference ground for being sampled as the input voltage signal of first phase, the input voltage signal transmission of first phase
To the input terminal of first bleeder circuit, is divided through first bleeder circuit, be converted into the first low-voltage signal, described first
The output end of bleeder circuit exports first low-voltage signal to the positive input of first operational amplifier, through described
After the amplification of one operational amplifier, the first output voltage signal is obtained, the output end output of first operational amplifier described the
One outputs voltage signal to the input terminal of the input terminal of first output circuit and second bleeder circuit, and described first
Output voltage signal is divided through second bleeder circuit, the reverse input end of first operational amplifier obtain with it is described
The output end of the matched signal of first output voltage signal, first output circuit exports first output voltage signal,
It is sampled with the input voltage signal to first phase；
The input voltage signal sampling module of second phase includes the second reference ground setting circuit, third bleeder circuit, the 4th
Bleeder circuit, second operational amplifier and the second output circuit；The input terminal of the second reference ground setting circuit connects institute
The input terminal of third bleeder circuit is stated, the output end of the second reference ground setting circuit connects the defeated of the 4th bleeder circuit
The output end of outlet, the third bleeder circuit connects the positive input of the second operational amplifier, second operation
The output end of amplifier is all connected with the input terminal of the 4th bleeder circuit and second output circuit, second fortune
The reverse input end for calculating amplifier is connect with the 4th bleeder circuit；The virtual ground of the second reference ground setting circuit
Line, the reference ground for being sampled as the input voltage signal of second phase, the input voltage signal transmission of second phase
To the input terminal of the third bleeder circuit, is divided through the third bleeder circuit, be converted into the second low-voltage signal, the third
The output end of bleeder circuit exports second low-voltage signal to the positive input of the second operational amplifier, through described
After the amplification of two operational amplifiers, the second output voltage signal is obtained, the output end output of the second operational amplifier described the
Two output voltage signal to the input terminal of the input terminal of second output circuit and the 4th bleeder circuit, and described second
Output voltage signal is divided through the 4th bleeder circuit, the reverse input end of the second operational amplifier obtain with it is described
The output end of the matched signal of second output voltage signal, second output circuit exports second output voltage signal,
It is sampled with the input voltage signal to second phase；
The input voltage signal sampling module of the third phase includes third reference ground setting circuit, the 5th bleeder circuit, the 6th
Bleeder circuit, third operational amplifier and third output circuit；The input terminal of the third reference ground setting circuit connects institute
The input terminal of the 5th bleeder circuit is stated, the output end of the third reference ground setting circuit connects the defeated of the 6th bleeder circuit
The output end of outlet, the 5th bleeder circuit connects the positive input of the third operational amplifier, the third operation
The output end of amplifier is all connected with the input terminal of the 6th bleeder circuit and the third output circuit, the third fortune
The reverse input end for calculating amplifier is connect with the 6th bleeder circuit；The virtual ground of the third reference ground setting circuit
Line, the reference ground for being sampled as the input voltage signal of the third phase, the input voltage signal transmission of the third phase
To the input terminal of the 5th bleeder circuit, is divided through the 5th bleeder circuit, be converted into third low-voltage signal, the described 5th
The output end of bleeder circuit exports the third low-voltage signal to the positive input of the third operational amplifier, through described
After the amplification of three operational amplifiers, third output voltage signal is obtained, the output end output of the third operational amplifier described the
Three output voltage signal to the input terminal of the input terminal of the third output circuit and the 6th bleeder circuit, the third
Output voltage signal is divided through the 6th bleeder circuit, the reverse input end of the third operational amplifier obtain with it is described
The output end of the matched signal of third output voltage signal, the third output circuit exports the third output voltage signal,
It is sampled with the input voltage signal to the third phase.
2. the input voltage signal sample circuit in three-phase three-wire system pfc circuit according to claim 1, feature exist
In the first reference ground setting circuit includes the first capacitance and first resistor, and first bleeder circuit includes the second electricity
Resistance and 3rd resistor, second bleeder circuit include the 4th resistance and the 5th resistance, and first output circuit includes the 6th
Resistance, wherein：
The first end of first capacitance is all connected with the first end of the first resistor, the first end of the second resistance, institute
The second end for stating the second end of the first capacitance and the second end of the first resistor, the 5th resistance is all connected with, and described first
The point that the second end of resistance is connect with the second end of the 5th resistance and the first resistor is connect with the 5th resistance connects
The reference ground that the first reference ground setting circuit fictionalizes, the second end of the second resistance and the first of the 3rd resistor
End, first operational amplifier positive input be all connected with, the positive input of first operational amplifier is also connected with
The first end of the 3rd resistor is to first voltage, the output end of first operational amplifier and the first of the 4th resistance
End, the 6th resistance first end be all connected with, the second end of the 4th resistance is reversed with first operational amplifier
Input terminal, the 5th resistance first end be all connected with.
3. the input voltage signal sample circuit in three-phase three-wire system pfc circuit according to claim 2, feature exist
In the input voltage signal sampling module of first phase further includes the second capacitance, third capacitance, the 4th capacitance and the 5th electricity
Hold, wherein：
The first end of second capacitance is connect with the first end of the 4th resistance, the second end of second capacitance with it is described
The second end of 4th resistance connects, and the first end of the third capacitance is connect with the first end of the 5th resistance, the third
The first of the second end of the second end of capacitance and the second resistance, the first end of the 4th capacitance and the 3rd resistor
End is all connected with, and the second end of the 4th capacitance is connect with the second end of the 3rd resistor, the first end of the 5th capacitance
It is connect with the second end of the 6th resistance, the second end ground connection of the 5th capacitance.
4. the input voltage signal sample circuit in three-phase three-wire system pfc circuit according to claim 2 or 3, feature
It is, the first voltage is 1.5V, and the resistance value of the 5th resistance is far longer than the resistance value of the 4th resistance, described
First output voltage signal is identical as the phase of input voltage signal of the first phase, and first output voltage signal
Amplitude is less than the amplitude of the input voltage signal of first phase.
5. the input voltage signal sample circuit in three-phase three-wire system pfc circuit according to claim 4, feature exist
In the second reference ground setting circuit includes the 6th capacitance and the 7th resistance, and the third bleeder circuit includes the 8th electricity
Resistance and the 9th resistance, the 4th bleeder circuit include the tenth resistance and eleventh resistor, and second output circuit includes the
12 resistance, wherein：
The first end of 6th capacitance is all connected with the first end of the 7th resistance, the first end of the 8th resistance, institute
The second end for stating the 6th capacitance and second end, the second end of the eleventh resistor of the 7th resistance are all connected with, and described
The second end of seven resistance is connect with the second end of the eleventh resistor and the 7th resistance is connect with the eleventh resistor
Point connect the reference ground that second reference ground setting circuit fictionalizes, second end and the 9th resistance of the 8th resistance
First end, the second operational amplifier positive input be all connected with, the positive input of the second operational amplifier
The first end of the 9th resistance is also connected with to second voltage, the output end of the second operational amplifier and the tenth resistance
First end, the first end of the twelfth resistor be all connected with, the second end of the tenth resistance and second operation amplifier
The reverse input end of device, the eleventh resistor first end be all connected with.
6. the input voltage signal sample circuit in three-phase three-wire system pfc circuit according to claim 5, feature exist
In the input voltage signal sampling module of second phase further includes the 7th capacitance, the 8th capacitance, the 9th capacitance and the tenth electricity
Hold, wherein：
The first end of 7th capacitance is connect with the first end of the tenth resistance, the second end of the 7th capacitance with it is described
The second end of tenth resistance connects, and the first end of the 8th capacitance is connect with the first end of the eleventh resistor, and described the
The of the second end of the second end of eight capacitances and the 8th resistance, the first end of the 9th capacitance and the 9th resistance
One end is all connected with, and the second end of the 9th capacitance is connect with the second end of the 9th resistance, and the first of the tenth capacitance
End is connect with the second end of the twelfth resistor, the second end ground connection of the tenth capacitance.
7. the input voltage signal sample circuit in three-phase three-wire system pfc circuit according to claim 5 or 6, feature
It is, the second voltage is 1.5V, and the resistance value of the eleventh resistor is far longer than the resistance value of the tenth resistance, institute
It is identical as the phase of input voltage signal of the second phase to state the second output voltage signal, and second output voltage signal
Amplitude be less than second phase input voltage signal amplitude.
8. the input voltage signal sample circuit in three-phase three-wire system pfc circuit according to claim 7, feature exist
Include the 11st capacitance and thirteenth resistor in, third reference ground setting circuit, the 5th bleeder circuit includes the
14 resistance and the 15th resistance, the 6th bleeder circuit include the 16th resistance and the 17th resistance, the third output
Circuit includes the 18th resistance, wherein：
The first end of 11st capacitance connects with the first end of the thirteenth resistor, the first end of the 14th resistance
It connects, the second end of the 11st capacitance connects with the second end of the thirteenth resistor, the second end of the 17th resistance
It connects, the second end of the thirteenth resistor is connect with the second end of the 17th resistance and the thirteenth resistor and described the
The point of 17 resistance connection connects the reference ground that the third reference ground setting circuit fictionalizes, the second end of the 14th resistance
It is all connected with the first end of the 15th resistance, the positive input of the third operational amplifier, the third operation is put
The positive input of big device is also connected with the first end of the 15th resistance to tertiary voltage, the third operational amplifier it is defeated
Outlet is all connected with the first end of the 16th resistance, the first end of the 18th resistance, and the of the 16th resistance
Two ends are all connected with the reverse input end of the third operational amplifier, the first end of the 17th resistance.
9. the input voltage signal sample circuit in three-phase three-wire system pfc circuit according to claim 8, feature exist
In the input voltage signal sampling module of, the third phase further include the 12nd capacitance, the 13rd capacitance, the 14th capacitance and
15th capacitance, wherein：
The first end of 12nd capacitance is connect with the first end of the 16th resistance, the second end of the 12nd capacitance
It is connect with the second end of the 16th resistance, the first end of the 13rd capacitance connects with the first end of the 17th resistance
Connect, the second end of the 13rd capacitance and the second end of the 14th resistance, the first end of the 14th capacitance and
The first end of 15th resistance is all connected with, and the second end of the 14th capacitance connects with the second end of the 15th resistance
It connects, the first end of the 15th capacitance is connect with the second end of the 18th resistance, the second end of the 15th capacitance
Ground connection.
10. the input voltage signal sample circuit in three-phase three-wire system pfc circuit according to claim 8 or claim 9, feature
It is, the tertiary voltage is 1.5V, and the resistance value of the 17th resistance is far longer than the resistance value of the 16th resistance,
The third output voltage signal is identical as the phase of the input voltage signal of the third phase, and the third output voltage is believed
Number amplitude be less than the third phase input voltage signal amplitude.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/078226 WO2018176184A1 (en) | 2017-03-25 | 2017-03-25 | Input voltage signal sampling circuit in three-phase three-wire system pfc circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108323185A true CN108323185A (en) | 2018-07-24 |
| CN108323185B CN108323185B (en) | 2020-09-15 |
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ID=62894115
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201780002506.8A Active CN108323185B (en) | 2017-03-25 | 2017-03-25 | Input voltage signal sampling circuit in three-phase three-wire system PFC circuit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN108323185B (en) |
| WO (1) | WO2018176184A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2018176184A1 (en) | 2018-10-04 |
| CN108323185B (en) | 2020-09-15 |
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