CN208890651U - A kind of voltage detecting circuit and the reversible transducer using the circuit - Google Patents
A kind of voltage detecting circuit and the reversible transducer using the circuit Download PDFInfo
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- CN208890651U CN208890651U CN201821539379.3U CN201821539379U CN208890651U CN 208890651 U CN208890651 U CN 208890651U CN 201821539379 U CN201821539379 U CN 201821539379U CN 208890651 U CN208890651 U CN 208890651U
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- voltage
- circuit
- reversible transducer
- detecting circuit
- voltage detecting
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- 230000002441 reversible effect Effects 0.000 title claims abstract description 57
- 238000005070 sampling Methods 0.000 claims abstract description 47
- 238000004804 winding Methods 0.000 claims abstract description 31
- 239000003990 capacitor Substances 0.000 claims description 30
- 230000005611 electricity Effects 0.000 claims description 10
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims description 2
- 230000009466 transformation Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 6
- 229910052744 lithium Inorganic materials 0.000 description 6
- 238000004146 energy storage Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001955 cumulated effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
Abstract
The utility model discloses the reversible transducers of a kind of voltage detecting circuit and the application circuit, operating voltage is provided to voltage sampling circuit by the auxiliary winding of transformer in reversible transducer, the output voltage of reversible transducer only carries out clamper to the pressure divider circuit of voltage sampling circuit, so that voltage sampling circuit obtains the information of output voltage when reversible transducer works, overvoltage control is carried out to primary side through photo-coupler feedback.When reversible transducer does not work, because of auxiliary winding noenergy, voltage sampling circuit does not work, and output voltage only carries out energy release through diode in the form of leakage current, to greatly reduce loss of the voltage sampling circuit to outlet side energy.Outlet side overvoltage protection when converter work had both may be implemented in the voltage detecting circuit of the utility model; the energy loss of converter outlet side when not working can be greatly reduced again; the utilization rate for improving outlet side energy improves the performance of circuit, application value with higher.
Description
Technical field
The utility model relates to a kind of voltage detecting circuit, in particular to a kind of voltage detecting circuit that leakage current is extremely low.
Background technique
As lithium battery and supercapacitor technologies develop more and more mature, lithium battery and supercapacitor are by widely
It is applied in energy-storage system.Since the monomer voltage of lithium battery and supercapacitor is lower, in order to obtain higher voltage and compared with
Big energy needs to be combined in series and parallel using multiple lithium battery/supercapacitors, to meet practical application request.In reality
It can be managed in the form of lithium battery group or supercapacitor group in the application system of border, substantially control the electricity of charge/discharge
Stream.So, it in order to improve the utilization rate of storage energy and extend the service life of energy-storage system, needs to carry out energy between group and group
Equilibrium, and voltage need to be detected in balancing procedure, prevent lithium battery group or supercapacitor group from overvoltage danger occur.
Currently, the balancing technique in energy-storage system generally uses reversible transducer in order to improve capacity usage ratio, belong to a kind of active equal
Weigh circuit.In the application of part energy-storage system, especially standby type energy-storage system needs strictly to require two-way changing
There is not overvoltage in output voltage when the leakage current of device outlet side is minimum and unloaded, both can guarantee that outlet side energy will not be because in this way
Biggish leakage current is discharged in the form of thermal energy, and can guarantee that reversible transducer will not go out when output is unloaded or hot plug
Existing overvoltage damages problem.However, the two requirements cannot be met simultaneously using existing output voltage sampling technique.
Have some reversible transducer products currently on the market, outlet side voltage sample mode is as shown in Figure 1, include adopting
Sample resistor network and opto-coupled feedback network, when reversible transducer does not work (system needs), due to sampling resistor network and light
Coupling feedback network is connected in parallel on output end, therefore can consume the energy of outlet side always, discharges in the form of heat.So as to cause storage
It cannot be well used in the energy of outlet side, reduce the overall performance of system.Above scheme can solve reversible transducer
Unloaded at work or balancing procedure outlet side overvoltage problem, but not can solve reversible transducer required when not working it is defeated
The minimum problem of side leakage electric current out.
In conclusion existing method is difficult to meet systematicness when the output voltage to reversible transducer samples
The requirement of energy, so that its application range is limited.
Utility model content
In view of this, the utility model is to overcome the shortcomings of existing methods the technical issues of solution, a kind of voltage inspection is proposed
The reversible transducer of slowdown monitoring circuit and the application circuit, both can guarantee reversible transducer in normal work has Zenith tracking function
Can, and can guarantee that reversible transducer leakage current of outlet side when not working is minimum, practical application request, especially one can be met
It is a little to require harsh backup power source occasion.
The technical solution that the utility model solves above-mentioned technical problem is as follows:
A kind of voltage detecting circuit samples for realizing the output voltage of converter, including voltage sampling circuit and optocoupler
Feed circuit；
Voltage sampling circuit, including second resistance and 3rd resistor, electricity of the second resistance one end as voltage sampling circuit
Sampling end is pressed, the second resistance other end is connected with 3rd resistor one end, and the 3rd resistor other end is as voltage detecting circuit voltage
Input cathode；
Opto-coupled feedback circuit for will the obtained voltage signal of sampling handled after feedback output, by photo-coupler, the
Four resistance, three terminal regulator and first capacitor are constituted, and wherein one end connects photo-coupler light-emitting diodes tube anode, light to the 4th resistance
Coupler light-emitting diodes tube cathode connects three terminal regulator cathode, first capacitor one end；Three terminal regulator anode connects voltage inspection
Slowdown monitoring circuit voltage input end cathode, three terminal regulator reference end and first capacitor other end connection second resistance and 3rd resistor
Series connection point；The two-way feedback output end of photo-coupler transistor collector and emitter respectively as voltage detecting circuit；
It preferably, further include having accessory power supply, first resistor and first diode, wherein accessory power supply is by converter
The auxiliary winding of transformer, the second diode and the second capacitor are constituted, for providing power supply for voltage sampling circuit；Transformation
The auxiliary winding Same Name of Ends of device connects the second diode anode, and the second diode cathode connects second capacitor one end, this tie point
As the anode of accessory power supply, and the 4th the resistance wherein other end, first resistor one end are connected simultaneously；The second capacitor other end connects
The auxiliary winding different name end of transformer, cathode of this tie point as accessory power supply are connect, and it is defeated to connect voltage detecting circuit voltage
Enter to hold cathode；The first resistor other end connects first diode anode, second resistance one end, this tie point is voltage sample electricity
The voltage sampling port on road；First diode cathode is as voltage detecting circuit voltage input end anode.
The utility model also provides a kind of reversible transducer using above-mentioned voltage detecting circuit, including main power circuit and
Control and driving circuit；Wherein, main power circuit includes transformer, and transformer includes three windings, respectively primary side winding,
Vice-side winding and auxiliary winding, the control terminal connection control of main power circuit and the control terminal of driving circuit, driving and control electricity
The current sampling port on road connects main power circuit, for detecting the current information of main loop of power circuit；
Preferably, reversible transducer further includes above-mentioned voltage detecting circuit, the two-way feedback output of voltage detecting circuit
End is separately connected the two-way input terminal of control and driving circuit；Voltage detecting circuit voltage input end anode connects reversible transducer
Voltage output end anode, voltage detecting circuit voltage input end cathode connect reversible transducer voltage output end cathode；
When reversible transducer works, accessory power supply provides supply voltage, voltage sampling circuit sampling for voltage sampling circuit
Reversible transducer voltage output end voltage, sampled voltage signal are fed back through opto-coupled feedback processing of circuit to control and driving circuit,
When sampling and outputting voltage be more than setting voltage, then start overvoltage protection；When reversible transducer does not work, voltage detecting circuit not work
Make, reversible transducer voltage output end is released energy by the leakage current of first diode in voltage detecting circuit.
Preferably, the control and driving circuit are made of control chip.
The scheme that the utility model is mentioned, working principle are described in detail in a particular embodiment, and cumulated volume is practical
Novel working principle, the utility model overcome the deficiency of voltage sample in the prior art, it has the advantage that:
(1) the utility model voltage detecting circuit can cross the overvoltage signal for accurately judging outlet side, and feed back to original
Side realizes output over-voltage defencive function；
(2) the utility model voltage detecting circuit is applied in reversible transducer, defeated when reversible transducer does not work
Side only consumes outlet side energy with minimum diode leakage current out, greatly improves the utilization rate of outlet side energy.
Detailed description of the invention
Fig. 1 is the voltage sampling circuit schematic diagram of the prior art；
Fig. 2 is the voltage detecting circuit schematic diagram of the utility model；
Fig. 3 is the circuit diagram of the utility model reversible transducer, is also the utility model voltage detecting circuit in two-way change
The application of converter circuit topology.
Specific embodiment
The inventive concept of the utility model are as follows: the auxiliary winding using the transformer in reversible transducer is voltage sample electricity
Road provides power supply, and by diode D1, by the sampling end voltage clamping of voltage sampling circuit, in Vo+VF, (wherein Vo is two-way
The output voltage of converter, VF are the forward conduction voltage drop of diode D1), thus realize the sampling to converter output voltage,
And sampling and outputting voltage signal is fed back to reversible transducer primary side through opto-coupled feedback circuit and is controlled；It is needed when due to system
Want, when converter is without work, voltage detecting circuit does not work, due to the presence of diode D1, converter outlet side only with
Diode D1 leakage current discharges, and the leakage current of general diode is minimum, and (such as: the leakage current of switching diode BAS16 is
25 DEG C of 1uA@), the carry out voltage sample scheme of outlet side is directly parallel in relative to existing resistance sampling network, this is practical new
Voltage sample network can be greatly reduced to the energy consumption of outlet side in type, greatly improve the utilization rate of outlet side energy.
With reference to the accompanying drawings and embodiments, the utility model is illustrated.It should be appreciated that specific reality described herein
It applies example to be only used to explain the utility model, is not used to limit the utility model.
Fig. 2 is the principle assumption diagram of the voltage detecting circuit of the utility model, including transformer auxiliary winding N3, resistance
R1, resistance R2, resistance R3, resistance R4, diode D1, diode D2, capacitor C1, capacitor C2, photo-coupler U1, three terminal regulator
U2, connection relationship are as follows: transformer auxiliary winding N3 Same Name of Ends connects diode D2 anode, and diode D2 cathode connects capacitor C2
One end, the capacitor C2 other end connect transformer auxiliary winding N3 different name end, and it is defeated that this tie point is also connected with voltage detecting circuit voltage
Enter and hold cathode, diode D2 cathode is also connected with the one end resistance R4, the one end resistance R1, and the resistance R1 other end passes through diode D1 sun
Pole, diode D1 cathode are connected to voltage detecting circuit voltage input end anode, and the resistance R4 other end connects photo-coupler U1 hair
Optical diode anode, photo-coupler U1 light-emitting diodes tube cathode connect the one end capacitor C1, three terminal regulator U2 cathode, three-terminal voltage-stabilizing
Device U2 anode connects the one end resistance R3 and voltage detection circuit voltage input end cathode, resistance R3 other end series resistance R2
After be connected between resistance R1 and diode D1, the capacitor C1 other end connects resistance R2 and resistance with the reference end three terminal regulator U1
The series connection point of R3, photo-coupler U1 transistor collector and emitter are respectively the feedback output end of voltage detecting circuit.
In foregoing circuit, diode D2 is rectifier diode, and capacitor C2 is filter capacitor, passes through diode D2 and capacitor C2
Rectifying and wave-filtering, transformer auxiliary winding N3 provide stable power supply for voltage sampling circuit, and resistance R2 and resistance R3 are to adopt
Sample resistance, resistance R1, the sample port that diode D1 tie point is voltage sampling circuit, the one end resistance R2 connects the sampling
The sampling to output voltage is realized in port, then the output voltage signal that sampling is obtained is by photo-coupler U1 feedback to feedback
Output end.
In addition, the utility model also provides a kind of reversible transducer using the utility model voltage detecting circuit, such as Fig. 3
Shown, reversible transducer includes main power circuit, control and driving circuit, voltage detecting circuit.Each circuit connecting relation are as follows:
Main power circuit, including transformer T1, resistance R5, capacitor C3~C5, power tube Q1~Q4, transformer T1 include original
Side winding N1, vice-side winding N2 and auxiliary winding N3, auxiliary winding N3 are the auxiliary winding in voltage detecting circuit, capacitor C3
One end is connected to primary side winding N1 different name end, and the voltage input end anode Vin+ as reversible transducer, for receiving input
Voltage；The capacitor C3 other end is connected with power tube Q1 drain electrode；Power tube Q1 source electrode connect primary side winding N1 Same Name of Ends, and simultaneously with
Power tube Q2 drain electrode is connected；Power tube Q2 source electrode is connected with the one end resistance R5, and as control and the current sample of driving circuit
Port Vi, the current sample for reversible transducer；Voltage input end cathode of the resistance R5 other end as reversible transducer
Vin-；Power tube Q3 drain electrode connection one end capacitor C5, and the voltage output end cathode Vo- as reversible transducer；Power tube Q3
Source electrode connects power tube Q4 source electrode, and is connected simultaneously with vice-side winding N2 different name end；Vice-side winding N2 Same Name of Ends connects capacitor C4
One end, and be connected simultaneously with the capacitor C5 other end, the voltage output end anode Vo+ as reversible transducer；The capacitor C4 other end
It is connected with power tube Q4 drain electrode.Power tube Q1 grid is connected with the control terminal Vg1 of control and driving circuit；Power tube Q2 grid with
Control and driving circuit control terminal Vg2 are connected；Power tube Q3 grid is connected with control and driving circuit control terminal Vg3；Power tube
Q4 grid is connected with control and driving circuit control terminal Vg4；Photo-coupler U1 transistor collector and hair in voltage detecting circuit
Emitter-base bandgap grading is respectively connected to the input terminal of control and driving circuit, and voltage detecting circuit voltage input end anode connects reversible transducer
Voltage output end anode Vo+, voltage detecting circuit voltage input end cathode connect reversible transducer voltage output end cathode Vo-.
Wherein, control and driving circuit are made of single-chip microcontroller and driving chip (such as SI8235), complete the control of whole system
System and driving function.
In conjunction with Fig. 2 and Fig. 3, the voltage detecting circuit of the present embodiment is applied and realizes voltage sample in reversible transducer
Working principle is described as follows:
(1) when reversible transducer works, reversible transducer master is acquired by carrying out detection to the end resistance R5 voltage
The current information of power circuit realizes the control of reversible transducer through control and driving circuit；N3 is through two for transformer auxiliary winding
Pole pipe D2 and capacitor C2 carries out rectifying and wave-filtering, obtains stable accessory power supply, provides power supply to voltage sampling circuit；It is two-way
Converter voltage output head anode Vo+ is through diode D1 by the sampling end voltage clamping of voltage sampling circuit to (i.e. two poles Vo+VF
The anode voltage of pipe D1 can reflect output voltage), by the partial pressure of resistance R2 and resistance R3, through three terminal regulator U2 and capacitor
The integrator that C1 is constituted realizes the control to photo-coupler U1 primary current, and then sampling and outputting voltage signal is fed back to original
Side；When exporting overvoltage protection threshold value of the sampled voltage more than setting, the electric current for flowing through photo-coupler internal diode is larger,
To drag down the voltage of photo-coupler U1 transistor collector.Control and driving circuit pass through acquisition photo-coupler triode collection
The voltage of electrode executes overvoltage protection mechanism to reversible transducer, realizes to the function of outlet side overvoltage protection, that is, starts
Overvoltage protection；The light emitting diode and three terminal regulator U2 that accessory power supply is given simultaneously in photo-coupler simultaneously provide operating voltage,
So that reversible transducer output voltage does not consume energy only to voltage sampling circuit clamper substantially.
(2) when system needs reversible transducer not work, then transformer T1 does not transmit energy, i.e. auxiliary winding N3 is incompetent
Amount, so that voltage sampling circuit does not work；In this stage, the voltage output end of reversible transducer is through diode D2 with leakage current
Form carry out energy release, because the leakage current (uA grades) of diode is minimum, so that voltage sampling circuit is to output voltage
Energy loss influences minimum.
To sum up, the voltage detecting circuit of the utility model, both can guarantee reversible transducer in normal work had electricity
Detection function is pressed, and can guarantee that reversible transducer leakage current of outlet side when not working is minimum, practical application request can be met,
It is especially some to require harsh backup power source occasion.
The above is only the utility model preferred embodiment, the utility model those skilled in the art can also be right
Above-mentioned specific embodiment is changed and is modified.Therefore, the voltage detecting circuit of the utility model is not limited to take off above
The reversible transducer for showing and describing can also be applied to other types converter and realize overvoltage protection and voltage sample function, for
For those skilled in the art, without departing from the spirit and scope of the utility model, to the utility model
Some modifications and changes should also be as falling into the protection scope of the claims of the present utility model.In addition, although in this specification
It uses some specific terms, these terms are merely for convenience of description, does not constitute any restrictions to the utility model.
Claims (3)
1. a kind of voltage detecting circuit, sampled for realizing the output voltage of converter, including voltage sampling circuit and optocoupler it is anti-
Current feed circuit；
Voltage sampling circuit, including second resistance and 3rd resistor, second resistance one end are adopted as the voltage of voltage sampling circuit
Sample end, the second resistance other end are connected with 3rd resistor one end, and the 3rd resistor other end is as voltage detecting circuit voltage input
Hold cathode；
Feedback output after opto-coupled feedback circuit is used to be handled the voltage signal that sampling obtains, by photo-coupler, the 4th electricity
Resistance, three terminal regulator and first capacitor are constituted, and wherein one end connects photo-coupler light-emitting diodes tube anode, optical coupling to the 4th resistance
Device light-emitting diodes tube cathode connects three terminal regulator cathode, first capacitor one end；Three terminal regulator anode connects voltage detecting electricity
Road voltage input end cathode, three terminal regulator reference end and first capacitor other end connection second resistance are connected with 3rd resistor
Point；The two-way feedback output end of photo-coupler transistor collector and emitter respectively as voltage detecting circuit；
It is characterized by also including have accessory power supply, first resistor and first diode, wherein accessory power supply is by converter
The auxiliary winding of transformer, the second diode and the second capacitor are constituted, for providing power supply for voltage sampling circuit；Transformation
The auxiliary winding Same Name of Ends of device connects the second diode anode, and the second diode cathode connects second capacitor one end, this tie point
As the anode of accessory power supply, and the 4th the resistance wherein other end, first resistor one end are connected simultaneously；The second capacitor other end connects
The auxiliary winding different name end of transformer, cathode of this tie point as accessory power supply are connect, and it is defeated to connect voltage detecting circuit voltage
Enter to hold cathode；The first resistor other end connects first diode anode, second resistance one end, this tie point is voltage sample electricity
The voltage sampling port on road；First diode cathode is as voltage detecting circuit voltage input end anode.
2. a kind of reversible transducer using voltage detecting circuit described in claim 1, including main power circuit and control and
Driving circuit；Wherein, main power circuit includes transformer, and transformer includes three windings, respectively primary side winding, secondary side around
The electricity of group and auxiliary winding, the control terminal connection control of main power circuit and the control terminal of driving circuit, driving and control circuit
It flows sampling end and connects main power circuit, for detecting the current information of main loop of power circuit；
It is characterized by: reversible transducer further includes voltage detecting circuit described in claim 1, the two-way of voltage detecting circuit
Feedback output end is separately connected the two-way input terminal of control and driving circuit；The connection of voltage detecting circuit voltage input end anode is double
To converter voltage output head anode, it is negative that voltage detecting circuit voltage input end cathode connects reversible transducer voltage output end
Pole；
When reversible transducer works, accessory power supply provides supply voltage for voltage sampling circuit, and voltage sampling circuit sampling is two-way
Converter voltage output end voltage, sampled voltage signal are fed back through opto-coupled feedback processing of circuit to control and driving circuit, when adopting
Sample output voltage is more than setting voltage, then starts overvoltage protection；When reversible transducer does not work, voltage detecting circuit does not work,
Reversible transducer voltage output end is released energy by the leakage current of first diode in voltage detecting circuit.
3. reversible transducer according to claim 2, it is characterised in that: the control and driving circuit are by control chip structure
At.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821539379.3U CN208890651U (en) | 2018-09-20 | 2018-09-20 | A kind of voltage detecting circuit and the reversible transducer using the circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821539379.3U CN208890651U (en) | 2018-09-20 | 2018-09-20 | A kind of voltage detecting circuit and the reversible transducer using the circuit |
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| Publication Number | Publication Date |
|---|---|
| CN208890651U true CN208890651U (en) | 2019-05-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821539379.3U Withdrawn - After Issue CN208890651U (en) | 2018-09-20 | 2018-09-20 | A kind of voltage detecting circuit and the reversible transducer using the circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208890651U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109039092A (en) * | 2018-09-20 | 2018-12-18 | 广州金升阳科技有限公司 | A kind of voltage detecting circuit and the reversible transducer using the circuit |
| CN110572046A (en) * | 2019-08-30 | 2019-12-13 | 广州金升阳科技有限公司 | DC/DC converter |
-
2018
- 2018-09-20 CN CN201821539379.3U patent/CN208890651U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109039092A (en) * | 2018-09-20 | 2018-12-18 | 广州金升阳科技有限公司 | A kind of voltage detecting circuit and the reversible transducer using the circuit |
| CN109039092B (en) * | 2018-09-20 | 2024-01-16 | 广州金升阳科技有限公司 | Voltage detection circuit and bidirectional converter using same |
| CN110572046A (en) * | 2019-08-30 | 2019-12-13 | 广州金升阳科技有限公司 | DC/DC converter |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190521 Effective date of abandoning: 20240116 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20190521 Effective date of abandoning: 20240116 |