CN110311571A - A kind of bidirectional constant control circuit for reversible transducer - Google Patents
A kind of bidirectional constant control circuit for reversible transducer Download PDFInfo
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- CN110311571A CN110311571A CN201910683080.8A CN201910683080A CN110311571A CN 110311571 A CN110311571 A CN 110311571A CN 201910683080 A CN201910683080 A CN 201910683080A CN 110311571 A CN110311571 A CN 110311571A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/3353—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
Abstract
The invention discloses a kind of bidirectional constant control circuits for reversible transducer, including current sampling circuit, the first current regulating circuit, the second current regulating circuit, opto-coupled feedback circuit, current direction control circuit；The current information of reversible transducer outlet side is obtained by current sampling circuit, the voltage signal of current sampling circuit output passes through the first current regulating circuit respectively and the second current regulating circuit forms the input terminal that negative-feedback signal is given to opto-coupled feedback circuit, in pwm circuit by opto-coupled feedback electronic feedback to reversible transducer, adjust switching tube duty ratio in reversible transducer, to accordingly adjust the electric current of outlet side, outlet side constant current is realized；The operative orientation of reversible transducer is controlled by changing the static working current of the output end of opto-coupled feedback circuit simultaneously.The present invention realizes the current constant control of the operative orientation switching and outlet side of reversible transducer.
Description
Technical field
The invention belongs to electronic technology fields, are related to a kind of bidirectional constant control circuit for bidirectional DC-DC converter.
Background technique
Because bidirectional DC-DC converter energy is positive or reverse operation, so the transmitted in both directions of energy can be realized, that is, allow electricity
It can be transmitted to outlet side from the input side of definition, also electric energy be allowed to be transmitted to input side from the outlet side of definition, functionally phase
When being returned in the energy of uninterruptible power supply, accumulator cell charging and discharging, electric car, powerful device in two Unidirectional direct-current converters
It has a very wide range of applications in receipts system, the occasions such as backup power source of powerful device.
Reversible transducer can define two kinds of operative orientations, and when forward direction works, energy is transferred to outlet side from input side；Reversely
When work, energy is transferred to input side from outlet side.Reversible transducer according to different applications, voltage to outlet side or
Electric current or power have different requirements, such as in battery balanced application, the input side and outlet side of reversible transducer
Battery or battery pack are connect, the electric current of reversible transducer outlet side will carry out current constant control, and require to switch work in reversible transducer
Make behind direction that output size of current is constant, only change direction, just needs a kind of control circuit to outlet side under this application
Electric current is controlled.
For realizing that the current control of outlet side, the prior art provide a kind of control electricity for realizing outlet side electric current constant current
Road, as shown in Figure 1, converter can be made by the way that different divider resistances or different band gap voltage reference sources is arranged in outlet side
Outlet side electric current is stablized in different current values.However, such control circuit be applied to reversible transducer when the problem is that
When the work of converter forward direction and reverse operation, the current direction on current sampling resistor is opposite: electric current when converter reverse operation
The voltage that sampling resistor obtains is positive, and the voltage that current sampling resistor obtains when converter forward direction works is negative, this just needs one
A positive and a negative sense band gap voltage reference source comes so that control circuit can when the work of converter forward direction or reverse operation
It works normally, but to realize that the band gap voltage reference source of negative sense is relatively difficult in the case where external power supply only has forward voltage.
In conclusion existing method is difficult to meet the needs of reversible transducer current constant control, so that it applies model
It encloses limited.
Summary of the invention
In view of this, present invention solves the technical problem that being to overcome the shortcomings of existing methods, proposition is answered for battery balanced
With a kind of bidirectional constant control circuit of the reversible transducer of occasion, the constant current of reversible transducer outlet side is realized.
The technical scheme to solve the above technical problems is that
A kind of bidirectional constant control circuit for reversible transducer, comprising:
Current sampling circuit accesses between the outlet side of reversible transducer and ground, turns for sampling outlet side current information
It is changed to voltage signal output；
First current regulating circuit connects the output end of current sampling circuit, defeated for making in the work of converter forward direction
Side constant current out, and loop feedback compensation is provided；
Second current regulating circuit connects the output end of current sampling circuit, defeated for making in converter reverse operation
Side constant current out, and loop feedback compensation is provided；
Opto-coupled feedback circuit, the input terminal of opto-coupled feedback circuit connect the output end of the first current regulating circuit, the second electricity
The output end of stream adjusting circuit, the output end of opto-coupled feedback circuit are connected to the input terminal of the pwm circuit of reversible transducer, are used for
Voltage signal through the first current regulating circuit or the output of the second current regulating circuit is subjected to isolation and feeds back to reversible transducer
Pwm circuit；
Current direction control circuit connects the input of the output end of opto-coupled feedback circuit and the pwm circuit of reversible transducer
End, for changing the operative orientation of reversible transducer.
The current information of reversible transducer outlet side, the voltage of current sampling circuit output are obtained by current sampling circuit
Signal passes through the first current regulating circuit respectively and the second current regulating circuit forms negative-feedback signal and is given to opto-coupled feedback circuit
Input terminal, in the pwm circuit by opto-coupled feedback electronic feedback to reversible transducer, adjust switching tube duty in reversible transducer
Than realizing outlet side constant current to accordingly adjust the electric current of outlet side；By the static state for changing the output end of opto-coupled feedback circuit
The operative orientation of operating current control reversible transducer.
Preferably, current sampling circuit includes the 9th resistance；9th resistance first end accesses the outlet side of reversible transducer,
As the output end of current sampling circuit, the 9th resistance second end connects the ground of reversible transducer outlet side.
Preferably, the first current regulating circuit include the first operational amplifier, 3rd resistor, the 4th resistance, the 5th resistance,
Second capacitor；The in-phase end of first operational amplifier connects the 9th resistance first end through the 4th resistance, and through 3rd resistor tape splicing gap
Voltage-reference；The reverse side of first operational amplifier connects the 9th resistance second end through the 5th resistance；Second capacitance connection is
Between the reverse side and output end of one operational amplifier；The output end of first operational amplifier is the output of the first current regulating circuit
End.
Preferably, the second current regulating circuit include second operational amplifier, the 6th resistance, the 7th resistance, the 8th resistance,
Third capacitor；The in-phase end of second operational amplifier connects the 9th resistance second end through the 7th resistance, and through the 6th resistance tape splicing gap
Voltage-reference；The reverse side of second operational amplifier connects the 9th resistance first end through the 8th resistance；Third capacitance connection is
Between the reverse side and output end of two operational amplifiers；The output end of second operational amplifier is the output of the second current regulating circuit
End.
Preferably, opto-coupled feedback circuit includes the first photo-coupler, the second photo-coupler, first resistor, first capacitor, the
Ten resistance, eleventh resistor, the first accessory power supply, the second accessory power supply；Luminous tube anode in first photo-coupler is through the tenth
Resistance connects the first accessory power supply, and cathode connects the output end of the first operational amplifier；Transistor emitter in first photo-coupler
The transistor emitter in the second photo-coupler is connect through first capacitor all the way, the transistor emitter in the first photo-coupler is another
Road is grounded, and the transistor collector in the first photo-coupler connects the transistor emitter in the second photo-coupler；Second optical coupling
Luminous tube anode in device connects the first accessory power supply through eleventh resistor, and cathode connects the output end of second operational amplifier；Second
Transistor collector in photo-coupler connects its emitter through first resistor all the way, the transistor collector in the second photo-coupler
Another way connects the second accessory power supply；Transistor collector in second photo-coupler is the output end of opto-coupled feedback circuit.
Preferably, current direction control circuit includes switch and second resistance, switch one end ground connection, the other end warp of switch
Second resistance connects the output end of opto-coupled feedback circuit.
The scheme that the present invention is mentioned, working principle are described in detail in a particular embodiment, and the present invention overcomes existing
There is the deficiency of reversible transducer current constant control technology in technology, operative orientation switching and the outlet side of reversible transducer may be implemented
Current constant control.
Detailed description of the invention
Fig. 1 is the circuit theory for the control circuit that the prior art realizes outlet side electric current constant current in practical application circuit
Figure；
Fig. 2 is the structural block diagram of bidirectional constant control circuit of the present invention；
Fig. 3 is that the embodiment circuit of bidirectional constant control circuit of the present invention is applied to the circuit diagram of reversible transducer；
Fig. 4 is the control sequential figure of reversible transducer main power circuit switching tube Q1 to Q4 of the present invention；
Specific embodiment
Below in conjunction with attached drawing and preferred embodiments, the present invention will be described.It should be appreciated that specific reality described herein
It applies example to be only used to explain the present invention, be not intended to limit the present invention.
Fig. 2 is that bidirectional constant control circuit of the invention is applied to the structural block diagram in reversible transducer, comprising: electric current is adopted
Sample circuit, is accessed between the outlet side of reversible transducer and ground, and for sampling outlet side current information, to be converted to voltage signal defeated
Out；First current regulating circuit connects the output end of current sampling circuit, for keeping outlet side permanent in the work of converter forward direction
Stream, and loop feedback compensation is provided；Second current regulating circuit connects the output end of current sampling circuit, in converter
Make outlet side constant current when reverse operation, and loop feedback compensation is provided；The input terminal of opto-coupled feedback circuit, opto-coupled feedback circuit connects
Connect the output end of the first current regulating circuit, the output end of the second current regulating circuit, the output end connection of opto-coupled feedback circuit
The input terminal of pwm circuit, for carrying out the voltage signal exported through the first current regulating circuit or the second current regulating circuit
Isolation feeds back to the pwm circuit of reversible transducer；Current direction control circuit connects the output end and PWM of opto-coupled feedback circuit
The input terminal of circuit, for changing the operative orientation of reversible transducer.
The current information of reversible transducer outlet side, the voltage letter of current sampling circuit output are obtained by current sampling circuit
Negative-feedback signal, which is formed, by the first current regulating circuit and the second current regulating circuit number respectively is given to opto-coupled feedback circuit
Input terminal, by opto-coupled feedback electronic feedback into pwm circuit and driving circuit, via in driving circuit adjustment main power circuit
Switching tube duty ratio realizes outlet side constant current to accordingly adjust the electric current of outlet side.It is anti-that current direction control circuit connects optocoupler
The output end of current feed circuit and the input terminal of pwm circuit, the static working current control of the output end by changing opto-coupled feedback circuit
The operative orientation of reversible transducer processed.
Fig. 3 is the circuit diagram that preferred embodiments circuit of the invention is applied to reversible transducer, as shown, two-way
Converter mainly includes main power circuit, driving circuit and pwm circuit；Pwm circuit is for exporting photo-coupler feed circuit
Voltage signal is converted to pwm signal；Driving circuit is used for according to switching tube Q1 in the pwm signal driving main power circuit received
~Q4.
Bidirectional constant control circuit is formed in the present embodiment specifically:
Current sampling circuit includes the 9th resistance R9；9th resistance R9 first end accesses the outlet side of reversible transducer, makees
For the output end of current sampling circuit, the 9th resistance R9 second end connects the ground of reversible transducer outlet side.
First current regulating circuit include the first operational amplifier, 3rd resistor R3, the 4th resistance R4, the 5th resistance R5,
Second capacitor C2；The in-phase end of first operational amplifier connects the 9th resistance R9 first end through the 4th resistance R4, and through 3rd resistor
R3 connects band gap voltage reference source；The reverse side of first operational amplifier connects the 9th resistance R9 second end through the 5th resistance R5；Second
Capacitor C2 is connected between the reverse side and output end of the first operational amplifier；The output end of first operational amplifier is the first electricity
Stream adjusts circuit output end.
Second current regulating circuit include second operational amplifier, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8,
Third capacitor C3；The in-phase end of second operational amplifier meets the 9th resistance R9 second end, and the 6th resistance R6 through the 7th resistance R7
Connect band gap voltage reference source；The reverse side of second operational amplifier connects the 9th resistance R9 first end through the 8th resistance R8；Third electricity
Hold C3 to be connected between the reverse side of second operational amplifier and output end；The output end of second operational amplifier is the second electric current
Adjust circuit output end.
Opto-coupled feedback circuit includes the first photo-coupler, the second photo-coupler, first resistor R1, first capacitor C1, the tenth
Resistance R10, eleventh resistor R11, the first accessory power supply VCC1, the second accessory power supply VCC2；Shining in the first photo-coupler
Tube anode meets the first accessory power supply VCC1 through the tenth resistance R10, and cathode connects the output end of the first operational amplifier；First optical coupling
Transistor emitter in device connects the transistor emitter in the second photo-coupler, the first photo-coupler through first capacitor C1 all the way
In transistor emitter another way ground connection, the transistor collector in the first photo-coupler connects three poles in the second photo-coupler
Pipe emitter；Luminous tube anode in second photo-coupler meets the first accessory power supply VCC1 through eleventh resistor R11, and cathode connects
The output end of two operational amplifiers；Transistor collector in second photo-coupler connects its emitter through first resistor R1 all the way,
Transistor collector another way in second photo-coupler meets the second accessory power supply VCC2；Triode collection in second photo-coupler
Electrode is the output end of opto-coupled feedback circuit.
Current direction control circuit includes switch and second resistance R2, and switch one end ground connection, the other end of switch is through second
Resistance R2 connects the output end of opto-coupled feedback circuit.
The working principle of the present embodiment are as follows: when the work of reversible transducer forward direction, have electric current stream on current sampling resistor R9
It crosses, because the ground of outlet side is located at the right side (second end of resistance R9) of resistance R9, therefore on the left of resistance R9 (first end of resistance R9)
Node voltage is negative value, and it is left negative right positive voltage that the both ends resistance R9, which generate direction,.Similarly, when reversible transducer reverse operation
When, current sampling resistor R9 equally has electric current to flow through, and resistance R9 left node voltage is positive value, at the both ends current sampling resistor R9
Generating direction is left positive right negative voltage.Therefore, when reversible transducer forward direction works, the anti-phase input of second operational amplifier
The quiescent operation voltage at end is negative, and the quiescent operation voltage of the non-inverting input terminal of second operational amplifier is positive, this makes second
In saturation region, influence of second current regulating circuit to opto-coupled feedback circuit is negligible for operational amplifier work, and at this time the
The quiescent operation voltage of the inverting input terminal of one operational amplifier is about zero, rationally designs the ratio of resistance R3 and resistance R4, can
So that the output voltage of the output voltage of band gap voltage reference source and current sampling circuit is to the same mutually defeated of the first operational amplifier
The influence for entering the quiescent operation voltage at end is cancelled out each other, and the quiescent operation voltage of the non-inverting input terminal of the first operational amplifier is about
Zero, this makes the first operational amplifier void short, and the first operational amplifier works in linear amplification region, therefore opto-coupled feedback circuit is defeated
Voltage is determined by the first current regulating circuit out；When reversible transducer reverse operation, the homophase input of the first operational amplifier
The quiescent operation voltage at end is positive, and the quiescent operation voltage of the non-inverting input terminal of the first operational amplifier is about zero, this makes
The work of one operational amplifier is in saturation region, and influence of first current regulating circuit to opto-coupled feedback circuit is negligible, at this time
The quiescent operation voltage of the inverting input terminal of second operational amplifier is positive, and rationally designs the ratio of resistance R6 and resistance R7, can
So that the output voltage of band gap voltage reference source be output to after decompression the voltage of second operational amplifier non-inverting input terminal with
The positive voltage of inverting input terminal is equal, this makes second operational amplifier void short, and second operational amplifier works in Linear Amplifer
Area, therefore the output voltage of opto-coupled feedback circuit is determined by the second current regulating circuit.
In this embodiment by making reversible transducer forward direction work when the switch OFF of current direction control circuit, electric current side
To control circuit switch conduction when make reversible transducer reverse operation.
When the switch OFF of current direction control circuit, the current visible of resistance R2 is as zero, after circuit the operation is stable
Because the characteristic that capacitor has ampere-second to balance is the static working current of capacitor C1 is zero, the input resistance of pwm circuit be may be regarded as
Infinity, the electric current flowed out from accessory power supply VCC2 flow to ground using the first photo-coupler triode after resistance R1, the
The electric current of the triode of two photo-couplers is negligible, this work normally the first current regulating circuit can, the second electric current
Adjusting circuit does not influence the output voltage of opto-coupled feedback circuit；When the switch of current direction control circuit is switched to conducting by turning off
When, the ratio of resistance R1 and resistance R2 are rationally designed, the static working current of resistance R1 may make to be less than the static work of resistance R2
Make electric current, the second photo-coupler triode electric current increases, and the first photo-coupler triode electric current, which is reduced to, can be ignored, this
So that the second current regulating circuit can work normally, the first current regulating circuit does not influence the output voltage of opto-coupled feedback circuit.
Driving signal Vg1, Vg2, Vg3, Vg4 of the driving circuit output of reversible transducer, which are followed successively by, is applied to switching tube
Driving signal between the grid and source electrode of Q1, Q2, Q3, Q4 (is followed successively by corresponding switching tube to the reference of above-mentioned driving signal
Source electrode, the reference ground of driving signal is omitted in Fig. 1, Fig. 2 and Fig. 3).Driving signal Vg1, Vg2 of four tunnel driving switch pipes,
Vg3, Vg4 are the driving signal of the identical fixed frequency of frequency, and corresponding switching tube is connected in while being high level, low electricity
Usually turn off corresponding switching tube.Fig. 4 is the control sequential figure of driving signal Vg1, Vg2, Vg3, Vg4, as shown in Figure 4:
Driving signal Vg2 is to have the dead time of a set time range, duty ratio adjustable with driving signal Vg3
Complementary pulse signal, i.e., within a duty cycle, when driving signal Vg2 is low level by high level overturning, driving letter
Number Vg3 is high level by low level overturning after a dead time；After two signals maintain a period of time, work as driving signal
Vgs3 by high level overturning be low level when, driving signal Vg2 after a dead time by low level overturning be high level；So
Circulation enters next duty cycle.
Within a duty cycle, when driving signal Vg3 becomes high level, driving signal Vg1 is just high after some time
Level, there are the times that one is all high level with driving signal Vg3, and become low level simultaneously with driving signal Vg3 and make out
Close pipe Q1 and Q3 shutdown；Within a duty cycle, the driving signal after some time when driving signal Vg2 becomes high level
Vg4 is high level, with driving signal Vg2 there are the time that one is all high level, becomes low electricity simultaneously with driving signal Vg2 afterwards
It is flat to turn off switching tube Q4 and Q2.
Switching tube Q2 is reversible transducer input side switching tube, and switching tube Q3 is reversible transducer output side switch pipe, excellent
Selection of land, the duty ratio of the driving of switching tube Q2 with opto-coupled feedback circuit output (the i.e. collector of the first photo-coupler triode
Or second photo-coupler triode emitter) voltage increase and increase, conversely, the duty ratio of the driving of switching tube Q2 is with optocoupler
The output voltage of feed circuit reduces and reduces.In battery balanced application, reversible transducer input side and output flank electricity
Pond or battery pack, being equivalent to input side and outlet side has very big capacitor, and input side and outlet side voltage are constant in a short time,
I.e. before switching tube Q2 duty ratio does not adjust stabilization, the input side and outlet side of reversible transducer may be regarded as constant pressure, so
Reasonable adjustable range is set to switching tube Q2 duty ratio, may be such that switching tube Q2 duty ratio increase can make reversible transducer defeated
The output electric current of side increases to the forward out, it may be assumed that when the work of reversible transducer forward direction, the output electric current of outlet side is with switching tube Q2
Duty ratio increases and increases, and the reduction of switching tube Q2 duty ratio can make output electric current reduce (increase toward reversed) to the forward.
To sum up, when reversible transducer forward direction works, reversible transducer output constant current, the first operational amplifier void is short, if
Sampling resistor R9 detects that outlet side electric current increases, and will occur: outlet side electric current increases the same mutually defeated of the → the first operational amplifier
The voltage for entering end increases with outlet side electric current and subtracts toward the reversed voltage for increasing and (reducing to the forward) output of → operational amplifier
Small → first photo-coupler LED current increases by the → the first photo-coupler collector current and increases by the → the first photo-coupler
Collector voltage reduction → input side switching tube Q2 duty ratio reduction → adjusting is so that outlet side electric current reduces, conversely, sampling
Resistance R9 detects that the reduction of outlet side electric current can then be such that outlet side electric current increases by the feedback regulation of control circuit, such anti-
Feedback control process makes the constant current in forward direction work of the output electric current of converter.
When reversible transducer reverse operation, reversible transducer output constant current, second operational amplifier void is short, if sampling electricity
Resistance R9 detects that outlet side electric current increases, and will occur: outlet side electric current increase → second operational amplifier inverting input terminal
Voltage increases with outlet side electric current and increase → second operational amplifier output voltage reduces the → the second photo-coupler luminous two
Pole pipe electric current increases by the → the second photo-coupler emitter current and increases the → the first photo-coupler collector voltage increase → input side
Duty ratio increase → adjusting of switching tube Q2 is so that outlet side electric current reduces, conversely, sampling resistor detects that outlet side electric current subtracts
It is small, outlet side electric current can be made to increase by the feedback regulation of control circuit, such feedback control procedure makes the defeated of converter
Side electric current also constant current in reverse operation out.
The above is only the preferred embodiment of the present invention, it is noted that above-mentioned preferred embodiment is not construed as pair
Limitation of the invention.For those skilled in the art, without departing from the spirit and scope of the present invention, also
Several improvements and modifications can be made, if Current Transformer replaces resistance to carry out current sample, are substituted with metal-oxide-semiconductor or triode
These modifications and embellishments should also be considered as the scope of protection of the present invention for switch in text, is no longer repeated here with embodiment, the present invention
Protection scope should be defined by the scope defined by the claims..In addition, all connections being related in patent/connection is closed
System, not singly refers to that component directly connects, and group can be carried out by adding or reducing couple auxiliary according to specific implementation situation by referring to
At more preferably coupling structure.Each technical characteristic in the invention, can interact under the premise of not conflicting conflict
Combination.
Claims (6)
1. a kind of bidirectional constant control circuit for reversible transducer, characterized by comprising:
Current sampling circuit accesses between the outlet side of reversible transducer and ground, is converted to for sampling outlet side current information
Voltage signal output；
First current regulating circuit connects the output end of current sampling circuit, for making outlet side in the work of converter forward direction
Constant current, and loop feedback compensation is provided；
Second current regulating circuit connects the output end of current sampling circuit, for making outlet side in converter reverse operation
Constant current, and loop feedback compensation is provided；
Opto-coupled feedback circuit, the input terminal of opto-coupled feedback circuit connect output end, the second electric current tune of the first current regulating circuit
Economize on electricity the output end on road, opto-coupled feedback circuit output end be connected to reversible transducer pwm circuit input terminal, for will be through
First current regulating circuit or the voltage signal of the second current regulating circuit output carry out the PWM that isolation feeds back to reversible transducer
Circuit；
Current direction control circuit connects the input terminal of the output end of opto-coupled feedback circuit and the pwm circuit of reversible transducer, uses
In the operative orientation for changing reversible transducer.
The current information of reversible transducer outlet side, the voltage signal of current sampling circuit output are obtained by current sampling circuit
Negative-feedback signal, which is formed, by the first current regulating circuit and the second current regulating circuit respectively is given to the defeated of opto-coupled feedback circuit
Enter to hold, in the pwm circuit by opto-coupled feedback electronic feedback to reversible transducer, adjust switching tube duty ratio in reversible transducer,
To accordingly adjust the electric current of outlet side, outlet side constant current is realized；Pass through the quiet of the output end of change opto-coupled feedback circuit simultaneously
The operative orientation of state operating current control reversible transducer.
2. a kind of bidirectional constant control circuit for reversible transducer according to claim 1, it is characterised in that: electric current
Sample circuit includes the 9th resistance；9th resistance first end accesses the outlet side of reversible transducer, as current sampling circuit
Output end, the 9th resistance second end connect the ground of reversible transducer outlet side.
3. a kind of bidirectional constant control circuit for reversible transducer according to claim 1, it is characterised in that: first
Current regulating circuit includes the first operational amplifier, 3rd resistor, the 4th resistance, the 5th resistance, the second capacitor；First operation is put
The in-phase end of big device connects the 9th resistance first end through the 4th resistance, and connects band gap voltage reference source through 3rd resistor；First operation
The reverse side of amplifier connects the 9th resistance second end through the 5th resistance；Reverse side of second capacitance connection in the first operational amplifier
Between output end；The output end of first operational amplifier is the first current regulating circuit output end.
4. a kind of bidirectional constant control circuit for reversible transducer according to claim 1, it is characterised in that: second
Current regulating circuit includes second operational amplifier, the 6th resistance, the 7th resistance, the 8th resistance, third capacitor；Second operation is put
The in-phase end of big device connects the 9th resistance second end through the 7th resistance, and connects band gap voltage reference source through the 6th resistance；Second operation
The reverse side of amplifier connects the 9th resistance first end through the 8th resistance；Reverse side of the third capacitance connection in second operational amplifier
Between output end；The output end of second operational amplifier is the second current regulating circuit output end.
5. a kind of bidirectional constant control circuit for reversible transducer according to claim 1, it is characterised in that: optocoupler
Feed circuit include the first photo-coupler, the second photo-coupler, first resistor, first capacitor, the tenth resistance, eleventh resistor,
First accessory power supply, the second accessory power supply；Luminous tube anode in first photo-coupler connects the first accessory power supply through the tenth resistance,
Cathode connects the output end of the first operational amplifier；Transistor emitter in first photo-coupler connects second through first capacitor all the way
Transistor emitter in photo-coupler, the transistor emitter another way ground connection in the first photo-coupler, the first photo-coupler
In transistor collector connect the transistor emitter in the second photo-coupler；Luminous tube anode in second photo-coupler is through
11 resistance connect the first accessory power supply, and cathode connects the output end of second operational amplifier；Triode collection in second photo-coupler
Electrode connects its emitter through first resistor all the way, and the transistor collector another way in the second photo-coupler connects the second auxiliary electricity
Source；Transistor collector in second photo-coupler is the output end of opto-coupled feedback circuit.
6. a kind of bidirectional constant control circuit for reversible transducer according to claim 1, it is characterised in that: electric current
Directional control circuit includes switch and second resistance, and switch one end is grounded, and the other end of switch connects opto-coupled feedback through second resistance
The output end of circuit.
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931849A (en) * | 2012-11-26 | 2013-02-13 | 宁德时代新能源科技有限公司 | Bidirectional DC (direct current)/DC conversion device |
| CN103872920A (en) * | 2014-03-13 | 2014-06-18 | 北京理工大学 | Leakage inductance current slope direct control method of isolation type two-way three-level converter |
| CN104659877A (en) * | 2015-01-28 | 2015-05-27 | 杭州高特电子设备有限公司 | Isolation double-way constant-current maintaining system based on power supply of common equipment |
| CN104868731A (en) * | 2014-02-21 | 2015-08-26 | 东莞钜威新能源有限公司 | Bidirectional isolation DC-DC converter |
| CN204707034U (en) * | 2015-01-30 | 2015-10-14 | 西南交通大学 | A kind of secondary resonant mode single step arrangement Single switch multiple constant current exports pfc converter |
| US20150349647A1 (en) * | 2014-06-02 | 2015-12-03 | Utah State University | Multi-mode control for a dc-to-dc converter |
| US20170346329A1 (en) * | 2016-05-25 | 2017-11-30 | Dialog Semiconductor Inc. | Switching power converter for direct battery charging |
| JP2018133964A (en) * | 2017-02-17 | 2018-08-23 | ニチコン株式会社 | Bidirectional insulation dc/dc converter |
| CN109842301A (en) * | 2019-01-30 | 2019-06-04 | 广州金升阳科技有限公司 | A kind of current control circuit and its control method |
-
2019
- 2019-07-26 CN CN201910683080.8A patent/CN110311571B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931849A (en) * | 2012-11-26 | 2013-02-13 | 宁德时代新能源科技有限公司 | Bidirectional DC (direct current)/DC conversion device |
| CN104868731A (en) * | 2014-02-21 | 2015-08-26 | 东莞钜威新能源有限公司 | Bidirectional isolation DC-DC converter |
| CN103872920A (en) * | 2014-03-13 | 2014-06-18 | 北京理工大学 | Leakage inductance current slope direct control method of isolation type two-way three-level converter |
| US20150349647A1 (en) * | 2014-06-02 | 2015-12-03 | Utah State University | Multi-mode control for a dc-to-dc converter |
| CN104659877A (en) * | 2015-01-28 | 2015-05-27 | 杭州高特电子设备有限公司 | Isolation double-way constant-current maintaining system based on power supply of common equipment |
| CN204707034U (en) * | 2015-01-30 | 2015-10-14 | 西南交通大学 | A kind of secondary resonant mode single step arrangement Single switch multiple constant current exports pfc converter |
| US20170346329A1 (en) * | 2016-05-25 | 2017-11-30 | Dialog Semiconductor Inc. | Switching power converter for direct battery charging |
| JP2018133964A (en) * | 2017-02-17 | 2018-08-23 | ニチコン株式会社 | Bidirectional insulation dc/dc converter |
| CN109842301A (en) * | 2019-01-30 | 2019-06-04 | 广州金升阳科技有限公司 | A kind of current control circuit and its control method |
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