CN209200931U - A kind of quick constant pressure and flow conversion circuit - Google Patents
A kind of quick constant pressure and flow conversion circuit Download PDFInfo
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- CN209200931U CN209200931U CN201821092759.7U CN201821092759U CN209200931U CN 209200931 U CN209200931 U CN 209200931U CN 201821092759 U CN201821092759 U CN 201821092759U CN 209200931 U CN209200931 U CN 209200931U
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- output interface
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- electric current
- constant pressure
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Abstract
The utility model discloses a kind of quick constant pressure and flow conversion circuits, its control module by control switch pipe Q1 conducting duty ratio with control flow through the filter reactor L1 electric current I1 size and by control switch pipe Q2 conducting duty ratio to control DC output interface both end voltage Uo size, if flowing through filter reactor L2 electric current is Ib, then DC output interface exports electric current Io=I1-Ib, so, after switching tube Q2 cut-off, the electric current I1 for flowing through the filter reactor L1 is directly exported from DC output interface, i.e. DC output interface output electric current Io only needs the fluctuation by very little that can be increased to I1 to carry out constant current output, at this time, DC output interface both end voltage Uo is determined by output electric current I1 and electrical equipment characteristic, it is passively, it is fast in DC output interface During velocity modulation section to I1 constant current output, DC output interface both end voltage Uo also only needs the fluctuation by very little that can settle out.
Description
Technical field
The utility model relates to a kind of quick constant pressure and flow conversion circuits.
Background technique
Traditional constant current constant voltage conversion circuit, output voltage and output electric current adjust loop complete independently by two PID,
Before load sudden change moment t1, voltage adjusts ring and works, but since at this moment given value of current value is bigger than current feedback values, current regulation
Ring is in relieving state, reaches when the t1 moment, and voltage adjusts ring and exits work, and current regulation loop starts to intervene work, but electric current
The dynamic process of another value is skipped to from a value, here dynamic process is usually overdamp oscillation or such as Fig. 4 as shown in Figure 3
Shown in underdamped oscillation, output could stablize by the long period.
Therefore, how to overcome above-mentioned defect, it has also become those skilled in the art's important topic urgently to be resolved.
Utility model content
The utility model overcomes the deficiency of above-mentioned technology, provides a kind of quick constant pressure and flow conversion circuit.
To achieve the above object, the utility model uses following technical proposal:
A kind of quick constant pressure and flow conversion circuit includes control module 1, direct current input interface 2, sets for external electricity consumption
Standby DC output interface 3 and the controlled constant pressure and constant being connected between the direct current input interface 2 and DC output interface 3
Conversion module 4 is flowed, the controlled constant pressure and flow conversion module 4 includes switching tube Q1, sustained diode 1, filter reactor
L1, switching tube Q2, sustained diode 2 and filter reactor L2, the one end the switching tube Q1 and the direct current input interface 2
Anode connection terminal, 2 cathode of sustained diode are connected, the switching tube Q1 other end and 1 cathode of sustained diode, filter
The one end wave reactor L1 is connected, 1 anode of sustained diode and the 2 cathode connecting pin of direct current input interface, switching tube
Mono- connecting pin Q2,3 cathode connecting pin of DC output interface are connected, the filter reactor L1 other end and the filtered electrical
The one end anti-device L2,3 anode connection terminal of DC output interface are connected, the filter reactor L2 other end and two pole of afterflow
Pipe D2 anode, another connecting pin switching tube Q2 are connected, the pwm control signal input terminal of the switching tube Q1, switching tube Q2
Pwm control signal input terminal is electrically connected with the control module 1 respectively, and the circuit further includes having for detection stream through the filter
The current detection module 5 of the electric current I1 size of wave reactor L1 and big for detecting the 3 both end voltage Uo of DC output interface
Small voltage detection module 6, the 5 current detection signal output end of current detection module, 6 voltage detecting of voltage detection module letter
Number output end is electrically connected with the control module 1 respectively.
A kind of quick constant pressure and flow conversion circuit as described above is also parallel with filtering between the DC output interface 3
Capacitor C1.
Compared with prior art, the utility model has the beneficial effects that
1, structure is simple and easy to implement for this case, is able to carry out quick constant pressure and flow conversion, and control module passes through control switch pipe
The duty ratio of Q1 conducting flows through the electric current I1 size of the filter reactor L1 and by control switch pipe Q2 conducting to control
Duty ratio is to control DC output interface both end voltage Uo size, if flowing through filter reactor L2 electric current is Ib, then direct current output
Interface exports electric current Io=I1-Ib, in this way, the electric current I1 for flowing through the filter reactor L1 is direct after switching tube Q2 cut-off
It is exported from DC output interface, i.e., DC output interface output electric current Io only needs the fluctuation by very little that can be increased to I1
To carry out constant current output, conversion is quick, avoids conversion speed and conversion accuracy in traditional circuit and is difficult to the contradiction taken into account,
It has substantive features and progress, at this point, DC output interface both end voltage Uo is determined by output electric current I1 and electrical equipment characteristic
It is fixed, be passively, during DC output interface quickly adjusts and arrives I1 constant current output, DC output interface both end voltage Uo
Also it only needs the fluctuation by very little that can settle out, has substantive features and progress.
Detailed description of the invention
Fig. 1 is the circuit structure diagram of the quick constant pressure and flow conversion circuit of this case.
Fig. 2 is that the constant pressure of the present apparatus turns constant current process schematic.
Fig. 3 is that traditional circuit constant pressure turns one of constant current process schematic.
Fig. 4 is that traditional circuit constant pressure turns the two of constant current process schematic.
Specific embodiment
The utility model feature and other correlated characteristics are described in further detail by the following examples, in order to same
The understanding of industry technology personnel:
As shown in Figure 1, a kind of quick constant pressure and flow conversion circuit, includes control module 1, direct current input interface 2, is used for
It the DC output interface 3 of external electrical equipment and is connected between the direct current input interface 2 and DC output interface 3
Controlled constant pressure and flow conversion module 4, the controlled constant pressure and flow conversion module 4 include switching tube Q1, sustained diode 1, filter
Wave reactor L1, switching tube Q2, sustained diode 2 and filter reactor L2, the one end the switching tube Q1 and the direct current
2 anode connection terminal of input interface, 2 cathode of sustained diode are connected, the switching tube Q1 other end and the freewheeling diode
D1 cathode, the one end filter reactor L1 are connected, and 1 anode of sustained diode is connect with 2 cathode of direct current input interface
End, mono- connecting pin switching tube Q2,3 cathode connecting pin of DC output interface are connected, the filter reactor L1 other end and institute
State the one end filter reactor L2,3 anode connection terminal of DC output interface is connected, the filter reactor L2 other end with it is described
2 anode of sustained diode, another connecting pin switching tube Q2 are connected, and the pwm control signal input terminal of the switching tube Q1 is opened
The pwm control signal input terminal for closing pipe Q2 is electrically connected with the control module 1 respectively, and the circuit further includes having for detection stream
The current detection module 5 of electric current I1 size through the filter reactor L1 and for detecting 3 both ends of DC output interface
The voltage detection module 6 of voltage Uo size, the 5 current detection signal output end of current detection module, 6 electricity of voltage detection module
Pressure detection signal output end is electrically connected with the control module 1 respectively.
As described above, structure is simple and easy to implement for this case, it is able to carry out quick constant pressure and flow conversion, control module 1 passes through control
The duty ratio of switching tube Q1 conducting processed flows through the electric current I1 size of the filter reactor L1 and by control switch pipe to control
The duty ratio of Q2 conducting is to control 3 both end voltage Uo size of DC output interface, if flowing through filter reactor L2 electric current is Ib, then
DC output interface 3 exports electric current Io=I1-Ib, in this way, flowing through the electricity of the filter reactor L1 after switching tube Q2 cut-off
It flows I1 directly to export from DC output interface 3, i.e., the output of DC output interface 3 electric current Io only needs the fluctuation energy by very little
I1 is increased to carry out constant current output, conversion is quick, avoids conversion speed and conversion accuracy in traditional circuit and is difficult to take into account
Contradiction, have substantive features and progress, at this point, 3 both end voltage Uo of DC output interface is by output electric current I1 and electricity consumption
Device characteristics determine, are that passively, during DC output interface 3 quickly adjusts and arrives I1 constant current output, direct current output is connect
3 both end voltage Uo of mouth also only need the fluctuation by very little that can settle out, and have substantive features and progress.
As described above, the quick constant pressure and flow conversion circuit of this case is suitable for vacuum glow discharge, ceramic discharge tube welds etc.
Electrical equipment.
As described above, when it is implemented, being also parallel with filter capacitor C1 between the DC output interface 3.
As described above, this case protection is a kind of quick constant pressure and flow conversion circuit, all are same or similar with this case
Technical solution should all be shown as falling into the protection scope of this case.
Claims (2)
1. a kind of quick constant pressure and flow conversion circuit, it is characterised in that include control module (1), direct current input interface (2), use
In external electrical equipment DC output interface (3) and be connected to the direct current input interface (2) and DC output interface
(3) the controlled constant pressure and flow conversion module (4) between, the controlled constant pressure and flow conversion module (4) include switching tube Q1, continue
Flow diode D1, filter reactor L1, switching tube Q2, sustained diode 2 and filter reactor L2, the switching tube Q1 mono-
End be connected with direct current input interface (2) anode connection terminal, 2 cathode of sustained diode, the switching tube Q1 other end and
1 cathode of sustained diode, the one end filter reactor L1 are connected, and 1 anode of sustained diode is defeated with the direct current
Incoming interface (2) cathode connecting pin, mono- connecting pin switching tube Q2, DC output interface (3) cathode connecting pin are connected, the filtering
The reactor L1 other end is connected with the one end the filter reactor L2, DC output interface (3) anode connection terminal, the filtering
The reactor L2 other end is connected with 2 anode of sustained diode, another connecting pin switching tube Q2, the switching tube Q1's
Pwm control signal input terminal, switching tube Q2 pwm control signal input terminal be electrically connected respectively with the control module (1), it is described
Circuit further includes having the current detection module (5) of the electric current I1 size for detection stream through the filter reactor L1 and for examining
Survey the voltage detection module (6) of the DC output interface (3) both end voltage Uo size, current detection module (5) electric current
Detection signal output end, voltage detection module (6) voltage detection signal output end are electrically connected with the control module (1) respectively.
2. a kind of quick constant pressure and flow conversion circuit according to claim 1, it is characterised in that the DC output interface
(3) filter capacitor C1 is also parallel between.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821092759.7U CN209200931U (en) | 2018-07-10 | 2018-07-10 | A kind of quick constant pressure and flow conversion circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821092759.7U CN209200931U (en) | 2018-07-10 | 2018-07-10 | A kind of quick constant pressure and flow conversion circuit |
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| Publication Number | Publication Date |
|---|---|
| CN209200931U true CN209200931U (en) | 2019-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821092759.7U Active CN209200931U (en) | 2018-07-10 | 2018-07-10 | A kind of quick constant pressure and flow conversion circuit |
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| Country | Link |
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| CN (1) | CN209200931U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832812A (en) * | 2018-07-10 | 2018-11-16 | 中山市昊源电器设备有限公司 | A kind of quick constant pressure and flow conversion equipment and its starting control method |
-
2018
- 2018-07-10 CN CN201821092759.7U patent/CN209200931U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108832812A (en) * | 2018-07-10 | 2018-11-16 | 中山市昊源电器设备有限公司 | A kind of quick constant pressure and flow conversion equipment and its starting control method |
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