CN102739026A - Short circuit retraction control protection method and system for direct current module based on digital signal processing - Google Patents
Short circuit retraction control protection method and system for direct current module based on digital signal processing Download PDFInfo
- Publication number
- CN102739026A CN102739026A CN2012102062145A CN201210206214A CN102739026A CN 102739026 A CN102739026 A CN 102739026A CN 2012102062145 A CN2012102062145 A CN 2012102062145A CN 201210206214 A CN201210206214 A CN 201210206214A CN 102739026 A CN102739026 A CN 102739026A
- Authority
- CN
- China
- Prior art keywords
- current
- module
- limiting points
- voltage threshold
- direct current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a short circuit retraction control protection method and a short circuit retraction control protection system for a direct current module based on digital signal processing (DSP). The method comprises the following steps of: S1, adjusting a preset current limiting point according to the relation among the input voltage of the direct current module, a preset first voltage threshold value and a preset second voltage threshold value, wherein the first voltage threshold value is higher than the second voltage threshold value; and the current limiting point is a current value; S2, adjusting the output current of the direct current module according to the current limiting point; and S3, when the current limiting point is higher than the preset current threshold value and the output voltage of the direct current module is lower than a third preset voltage threshold value, adjusting the current limiting point to lower the current limiting point according to the output voltage, and returning to the step S2. The defects of high dependence on hardware and low flexibility are overcome, and the direct current module can adapt to the condition of a short circuit in long time, and the method is high in adjustment speed, low in impact and flexible in configuration.
Description
Technical field
The present invention relates to the fail-safe circuit technical field, relate in particular to a kind of control guard method of direct current module short circuit retraction and system thereof based on DSP (Digital Signal Processing, digital signal processor).
Background technology
High frequency switch power is owing to be operated under the high frequency power output condition; The inside of module or external unusual service condition all possibly cause the irregular working of module; Can have a strong impact on the operate as normal of power-supply system; Usually need carry out the error protection design to power module, wherein short trouble more should be paid much attention to as one of serious fault type.
In the practical work process; Switching Power Supply maybe be because the inside modules component failure; Like the output diode short circuit, perhaps the people of output loading is misoperation, causes module short circuit like reasons such as wiring errors; And then operation irregularity even aircraft bombing, therefore need be to carrying out necessary short-circuit protection design under the module short circuit operating mode.Suitable short-circuit protection design not only can make and prevent that module from further device failure taking place, and can also guarantee if after external misoperation is eliminated, restart and operate as normal.
Present short-circuit protection designing technique has the short circuit wave limiting and closes machine technology and short circuit virtual protection technology.
Short circuit wave limiting and to close the short-circuit protection sketch map of machine technology as shown in Figure 1; Technical scheme is: through the short circuit condition of detecting module, whether judge module is in short circuit, in case satisfy short circuit fault condition; Wave limiting function through hardware is to PWM (the Pulse Width Modulation of driving switch pipe; Pulse width modulation) waveform limits duty ratio and handles, thereby makes module output current wave occur disappearing top and obtain amplitude limit, prevents that switching device from puncturing because of overcurrent.On this basis, cooperate the time-delay tally function, after satisfying setting-up time, the power section of closing module.Finding out the process of wave limiting for ease, is example with the wave limiting that exchanges module, and referring to Fig. 2, Fig. 2 (a) voltage peak is 4.16 volts; Fig. 2 (b) voltage peak is 4.24 volts; Fig. 2 (c) voltage peak is 4.32 volts.Can find out that along with the continuous increase of sinusoidal wave amplitude, the duty ratio at peak value place is closed gradually,, can find out the top that occurs disappearing, crest place through the waveform of observation output current.For the direct current module, the wave limiting effect is identical with alternating current, only unidirectional wave limiting.
Short circuit wave limiting and the shortcoming of closing machine technology are: the wave limiting mode through hardware prevents that short circuit from puncturing, though can be effectively protected, the switch device drive part component of stress is big, and high to hardware requirement; If hardware damage or parameter drift will cause defencive function reduction or disappearance; The short-circuit protection function flexibility is relatively poor; If temporary transient short trouble occurs, and hold time above the short circuit shutdown judgement time, shutdown will appear in module.
Short circuit virtual protection technology utilizes digital signal processor DSP to realize; When satisfying short circuit condition; Be lower than set point or output current is higher than set point like output voltage, module is disconnected to prevent erroneous judgement through software setting time-delay counting, when the time-delay counting arrives Preset Time; The driving of turning off respective switch element in the module by force makes module be in standby no-output state.The short circuit virtual protection flow chart of short circuit virtual protection technology is as shown in Figure 3.
The shortcoming of short circuit virtual protection technology is: the short circuit virtual protection is a kind of hard protection, in case after assert that short trouble appears in module, module has only shutdown, stops external output, wait pending fault to eliminate after, restart.It is long to have a troubleshooting cycle, characteristics such as very flexible, and protection speed is slow excessively, can not independent utility in exchanging module.
Summary of the invention
The objective of the invention is to propose a kind of control guard method of direct current module short circuit retraction and system thereof based on DSP, the system that can make has higher fail safe, reliability and flexibility.
The invention discloses a kind of direct current module short circuit retraction control guard method, comprising based on DSP:
S1, according to the preset current-limiting points of relation adjustment adjustment of the input voltage of said direct current module and preset first voltage threshold, preset second voltage threshold, said first voltage threshold is higher than said second voltage threshold, said current-limiting points is a current value;
S2, the said current-limiting points of foundation are adjusted the output current of said direct current module;
When S3, the output voltage that is higher than predetermined current threshold value and said direct current module when said current-limiting points are lower than preset tertiary voltage threshold value, adjust said current-limiting points according to said output voltage and said current-limiting points is reduced and return step S2.
Further, said step S1 comprises:
The relation of the input voltage of judging said direct current module and preset first voltage threshold, preset second voltage threshold;
If the input current of said direct current module is higher than said first voltage threshold, then do not adjust said preset current-limiting points;
If the input voltage of said direct current module is lower than said second voltage threshold, then break off said direct current modular circuit;
If the input voltage of said direct current module is lower than said first voltage threshold and is higher than said second voltage threshold, then adjust said current-limiting points.
Further, the current-limiting points of adjustment described in the step S1 comprises:
According to the said current-limiting points of the relation of the preset function between said current-limiting points and said input voltage adjustment, said preset function relation comprises linear relationship.
Further, adjusting said current-limiting points according to said output voltage described in the step S3 comprises said current-limiting points reduction:
According to the said current-limiting points of preset function relation adjustment between the output voltage of said direct current module and the said current-limiting points, said preset function relation satisfies diminishes said current-limiting points, and said preset function relation comprises linear relationship.
Further, tertiary voltage threshold value described in current threshold described in second voltage threshold, the step S3 described in first voltage threshold, the step S1 described in preset current-limiting points, the step S1 and the step S3 is the host computer set point described in the step S1.
Further; Said direct current module is the circuit signal DC power supply, and said current threshold is set at 30 peaces to 34 peaces, said first voltage threshold and is set at 150 volts to 160 volts, said second voltage threshold to be set at 110 volts to 130 volts and said tertiary voltage threshold setting be 20 volts to 24 volts.
The invention also discloses a kind of direct current module short circuit retraction control protection system, comprising based on DSP:
The current-limiting points adjusting module; Be used for sending to said output current regulation module according to the preset current-limiting points of relation adjustment adjustment of the input voltage of said direct current module and preset first voltage threshold, preset second voltage threshold and with said current-limiting points; Said first voltage threshold is higher than said second voltage threshold; Said current-limiting points is the current value output current regulation module, is used to receive the current-limiting points of said current-limiting points adjusting module and the output current that the said current-limiting points of foundation is adjusted said direct current module;
Short circuit retraction module; Be used for when output voltage that said current-limiting points is higher than predetermined current threshold value and said direct current module is lower than preset tertiary voltage threshold value, adjust said current-limiting points according to said output voltage and said current-limiting points is reduced and call the output current that said output current regulation module is adjusted said direct current module.
Further, said current-limiting points adjusting module comprises:
The relation of the input voltage of judging said direct current module and preset first voltage threshold, preset second voltage threshold;
If the input current of said direct current module is higher than said first voltage threshold, then do not adjust said preset current-limiting points;
If the input voltage of said direct current module is lower than said second voltage threshold, then break off said direct current modular circuit;
If the input voltage of said direct current module is lower than said first voltage threshold and is higher than said second voltage threshold, then adjust said current-limiting points.
Further, the current-limiting points of adjustment described in the current-limiting points adjusting module comprises:
According to the said current-limiting points of the relation of the preset function between said current-limiting points and said input voltage adjustment, said preset function relation comprises linear relationship.
Further, adjusting said current-limiting points according to said output voltage described in the short circuit retraction module comprises said current-limiting points reduction:
According to the said current-limiting points of preset function relation adjustment between the output voltage of said direct current module and the said current-limiting points, said preset function relation satisfies diminishes said current-limiting points, and said preset function relation comprises linear relationship.
Further, tertiary voltage threshold value described in current threshold described in second voltage threshold described in first voltage threshold, the current-limiting points adjusting module described in preset current-limiting points, the current-limiting points adjusting module, the short circuit retraction module and the short circuit retraction module is the host computer set point described in the current-limiting points adjusting module.
Further; Said direct current module is the circuit signal DC power supply, and said current threshold is set at 30 peaces to 34 peaces, said first voltage threshold and is set at 150 volts to 160 volts, said second voltage threshold to be set at 110 volts to 130 volts and said tertiary voltage threshold setting be 20 volts to 24 volts.
Useful technique effect of the present invention is the deficiency that has solved in direct current module short circuit or the overload protection hardware too relies on and flexibility is relatively poor; After short circuit, output voltage is arranged on the less magnitude of voltage according to the retraction curve, thereby can adapt to short-circuit conditions for a long time, and is provided with flexibly, and protection speed is fast.
Description of drawings
Fig. 1 is a short circuit wave limiting and close the short-circuit protection sketch map of machine technology in the background technology of the present invention;
Fig. 2 (a) is the wave limiting sketch map when voltage peak is 4.16 volts in the background technology of the present invention;
Fig. 2 (b) is the wave limiting sketch map when voltage peak is 4.24 volts in the background technology of the present invention;
Fig. 2 (c) is the wave limiting sketch map when voltage peak is 4.32 volts in the background technology of the present invention;
Fig. 3 is the short circuit virtual protection flow chart of short circuit virtual protection technology in the background technology of the present invention;
Fig. 4 is the direct current module short circuit retraction control guard method flow chart that the present invention is based on DSP;
Fig. 5 be the embodiment of the invention the input civil power to current-limiting points given influence sketch map;
Fig. 6 is the adjustment output current sketch map of the embodiment of the invention;
Fig. 7 is the short circuit retraction curve synoptic diagram of the embodiment of the invention;
Fig. 8 is the direct current module short circuit retraction control protection system structured flowchart that the present invention is based on DSP;
Fig. 9 is the short-circuit protection sketch map of the embodiment of the invention.
Embodiment
For making the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that embodiment of the present invention is done to describe in detail further below.
Embodiment one
The scheme of the embodiment of the invention realizes in digital processing chip DSP.
Fig. 4 is the direct current module short circuit retraction control guard method flow chart that the present invention is based on DSP.
S401: obtain input voltage, obtain preset current-limiting points, obtain preset current threshold, obtain the first preset voltage threshold, obtain the second preset voltage threshold, obtain preset tertiary voltage threshold value;
Said current-limiting points, said current threshold, said first voltage threshold, said second voltage threshold and/or said tertiary voltage threshold value are predefined value; In concrete application; If these values preferably need be fixed up through practice; Be unsuitable for change, can write among the digital processing chip DSP with the form of definite value; Adjust according to condition of different if desired, can in host computer, set.
Wherein, said first voltage threshold is represented is when civil power during less than this voltage, need current-limiting points be reduced to a less value, serves as with reference to letting this direct current module under a lower electric current, continue to move with this current-limiting points; When said second voltage threshold represented that civil power is lower than this voltage, this direct current module can't run well, the shutdown of need opening circuit.So first voltage threshold of setting need be higher than second voltage threshold of setting.
In the railway signal power supply field, the preferable range of said current threshold is that the preferable range of 30 peaces to 34 peaces, said first voltage threshold is that 150 volts to 160 volts, the preferable range of said second voltage threshold are that the preferable range of 110 volts to 130 volts and/or said tertiary voltage threshold value is 20 volts to 24 volts.
S402: whether the input voltage of judging said direct current module is higher than said first voltage threshold, if execution in step S406 then, otherwise execution in step S403;
S403: whether the input voltage of judging said direct current module is higher than said second voltage threshold, if execution in step S405 then, otherwise execution in step S404;
S404: break off modular circuit;
S405: according to input voltage adjustment current-limiting points;
What said first voltage threshold was represented is a flex point of the input voltage of said direct current module, and when input voltage was higher than first voltage threshold, module can be the input and output that reference current is adjusted voltage and current with the current-limiting points that is provided with in advance.
When said second voltage threshold represented that civil power is lower than this voltage, this direct current module can't run well, therefore, and when the input voltage of said direct current module is lower than the shutdown of need opening circuit of second voltage threshold; When the input voltage of said direct current module is between first voltage threshold and second voltage threshold; Because the too little adjustment current-limiting points that needs of output voltage; Making current-limiting points be reduced to a less value, serves as with reference to letting this direct current module under a lower electric current, continue operation with this current-limiting points.
Wherein, The requirement of adjustment current-limiting points is to guarantee that adjusted current-limiting points is littler than originally, and method can be varied, can be adjusted to definite value; Also can adjust said current-limiting points, and this preset relation can be linear relationship according to the preset relation between current-limiting points and the input voltage.
In the present embodiment input civil power to current-limiting points given to influence sketch map as shown in Figure 5, ordinate is represented input voltage among Fig. 5, abscissa is represented current-limiting points calibration amount; Current-limiting points adopts the Q12 calibration, is about to preset initial current limliting point value and is mapped as 4096, in the present embodiment; First voltage threshold is set to 286V; Second voltage threshold is set to 154V, and the preset function relation between current-limiting points and the input voltage is linear relationship, when importing the line voltage scope at [154V; 286V] between the time, adjusted current-limiting points I
SetLmt1For setting current-limiting points I
SetLmtWhen the input civil power is 120V, adjusted current-limiting points I
SetLmt1=0.5I
SetLmt(i.e. figure in 2048); When the input civil power between [120V, 154V] time, I
SetLmt1With I
SetLmtCan confirm according to the linear relationship among Fig. 5.
S406: according to current-limiting points adjustment output current;
After obtaining current-limiting points, regulate the actual amplitude limit value of output current through current-limiting points.The adjustment output current sketch map of the embodiment of the invention is as shown in Figure 6.Among Fig. 5, K
LmtBe the proportional component of current limliting ring controller, guarantee higher low-frequency gain; K
ILMT_fbFeedback system for restrictor ring; K
I_fbBe the inductor current feedback coefficient; K
I_pThe proportional component coefficient of electric current loop PI controller in the expression; ω
LmtBe the zero point of restrictor ring, increase the phase margin at cut-off frequency place; ω
IzThe zero point of electric current loop PI controller in the expression is in order to improve phase margin;
Be interior current loop controller, accomplish the dynamic process of outputting inductance current following electric current set-point through this controller; K
Lmt* (S+ ω
Lmt)/S is the current limliting ring controller, and after the current limliting condition occurring, this ring replaces the electric current set-point that Voltage loop produces electric current loop, thereby limits output current value; I
RefLmtThe expression current-limiting points; G1 (s) and G2 (s) are the transfer function of the controlling object of DC/DC buck buck converter, and wherein, G1 (s) expression outputting inductance electric current is to the transfer function of PWM duty ratio, and G2 (s) expression outputting inductance electric current is to the transfer function of output voltage.
Wherein, G1 (s) is in the current inner loop, and G2 (s) is in outside the electric current loop, all can push away by the state space method of average:
G1 (s)=U
Dc(sL+R
L), U wherein
DcBusbar voltage for PFC output; L is the BUCK inductance in the DC/DC circuit; RL is the dead resistance on the inductance.
S407: whether satisfying current-limiting points and surpass current threshold and output voltage less than the tertiary voltage threshold value, is execution in step S408 then, otherwise execution in step S409;
This step is the short circuit determining step, if the current electric current of module greater than the current voltage of predetermined current threshold value and direct current module during less than preset tertiary voltage threshold value, decision circuitry is a short-circuit condition.Because this moment, the actual current of module equated with current-limiting points, so with current-limiting points representation module electric current.
S408: short circuit retraction module is adjusted current-limiting points according to output voltage, returns step S406;
When satisfying short circuit condition, through the mode of loop,, change the set-point of output current according to setting curve, in the short circuit process, along with the reduction of output voltage, in the certain limit, current-limiting points is linear to be reduced, and finally reduces to preset current threshold.
The said setting curve of the embodiment of the invention is as shown in Figure 7, and the longitudinal axis is represented the actual output voltage value, and transverse axis is represented current-limiting points, and when output voltage was between 22V-28.5V, output current changed along with the variation of load, but is 82.5A to the maximum; After overload or short-circuit conditions occurring, output voltage will drop (being lower than 22V) even drop to very low magnitude of voltage (near 0V), and this moment, output current will carry out the linearity adjustment according to the retraction curve, and minimum value is limited in 32.8A.
Through the mode of loop, carry out the design of short circuit retraction, in existing module, the retraction time is very short, is the microsecond rank, has well reached the demand of retraction.
S409: current-limiting points is constant, and module is moved by current set mode.
When satisfying short circuit condition, module is moved by current set mode, and current-limiting points is constant.
According to above-mentioned technical characterstic, the said method of present embodiment is mainly used in the short-circuit protection occasion of direct current module, the occasion of particularly having relatively high expectations to the stability of a system, such as: the signal power source system; The power supply system for communications; Electric power operation power supply etc.
Through the short circuit retraction, limit module has been lived output current, and power output is limited on the relatively safer magnitude.Reduced the cost of human intervention and maintenance.
Embodiment two
Referring to Fig. 8, present embodiment provides a kind of direct current module short circuit retraction control protection system based on DSP, and this system comprises:
Current-limiting points adjusting module 801; Link to each other with output current regulation module; Be used for sending to said output current regulation module according to the input voltage adjustment current-limiting points of preset current-limiting points, preset first voltage threshold, preset second voltage threshold and said direct current module and with said current-limiting points; Said first voltage threshold is higher than said second voltage threshold, and said current-limiting points is a current value;
In this module, the concrete implementation of said adjustment current-limiting points is not given unnecessary details at this referring to embodiment 1.
Output current regulation module 802 links to each other with short circuit retraction module with said current-limiting points adjusting module, is used to receive the current-limiting points of said current-limiting points adjusting module and the output current that the said current-limiting points of foundation is adjusted said direct current module;
In this module, the concrete implementation of the said output current of adjusting said direct current module according to current-limiting points is not given unnecessary details at this referring to embodiment 1.Short circuit retraction module 803; Link to each other with said output current regulation module; Be used for when output voltage that said current-limiting points is higher than predetermined current threshold value and said direct current module is lower than preset tertiary voltage threshold value, adjust said current-limiting points according to said output voltage and said current-limiting points is reduced and call the output current that said output current regulation module is adjusted said direct current module.
In this module, the said output voltage adjustment of said foundation current-limiting points makes the concrete implementation of said current-limiting points reduction referring to embodiment 1, does not give unnecessary details at this.
Fig. 9 is the short-circuit protection sketch map of present embodiment, function f (V
In, λ
1) function and the design content that is current-limiting points adjusting module 801, function f (V
Out, λ
2) function and design be the content of short circuit retraction control module 803.
V
InRefer to input line voltage value; I
SetLmt1The setting current value that refers to host computer or monitoring module; λ
1And λ
2Refer to the digital quantity after the calibration among the DSP; I
SetLmt1Refer to current-limiting points; V
OutRefer to output voltage values; I
RefLmtRefer to the current limliting reference point;
Host computer also need be provided with current-limiting points in advance, if current-limiting points I
SetLmt1During less than this preset value, current-limiting points is constant, i.e. I
RefLmt=I
SetLmt1, otherwise current-limiting points I
RefLmtAccording to function f (V
Out, λ
2) confirm.
The predetermined current threshold value is 32.8A in the present embodiment, and the tertiary voltage threshold value is 22V,, when output load current surpasses 32.8A, current-limiting points I
RefLmtEqual current-limiting points I
SetLmt1, if less than 32.8A, during then according to short circuit, the retraction characteristic of output voltage is according to function f (V
Out, λ
2) dynamic change.
Control guard method of direct current module short circuit retraction and system based on DSP provided by the invention solved the hardware of depending on unduly that exists in the present direct current module short circuit protection; The deficiency that flexibility is not high; That not only realizes is with low cost, and the attendant is not required, and reduces maintenance cost and maintenance technology difficulty; And can significantly improve the reliability of short-circuit protection, have high cost performance.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (12)
1. the direct current module short circuit retraction control guard method based on DSP is characterized in that, comprising:
S1, according to the preset current-limiting points of relation adjustment adjustment of the input voltage of said direct current module and preset first voltage threshold, preset second voltage threshold, said first voltage threshold is higher than said second voltage threshold, said current-limiting points is a current value;
S2, the said current-limiting points of foundation are adjusted the output current of said direct current module;
When S3, the output voltage that is higher than predetermined current threshold value and said direct current module when said current-limiting points are lower than preset tertiary voltage threshold value, adjust said current-limiting points according to said output voltage and said current-limiting points is reduced and return step S2.
2. the direct current module short circuit retraction control guard method based on DSP as claimed in claim 1 is characterized in that said step S1 comprises:
The relation of the input voltage of judging said direct current module and preset first voltage threshold, preset second voltage threshold;
If the input current of said direct current module is higher than said first voltage threshold, then do not adjust said preset current-limiting points;
If the input voltage of said direct current module is lower than said second voltage threshold, then break off said direct current modular circuit;
If the input voltage of said direct current module is lower than said first voltage threshold and is higher than said second voltage threshold, then adjust said current-limiting points.
3. the direct current module short circuit retraction control guard method based on DSP as claimed in claim 1 is characterized in that the current-limiting points of adjustment described in the step S1 comprises:
According to the said current-limiting points of the relation of the preset function between said current-limiting points and said input voltage adjustment, said preset function relation comprises linear relationship.
4. the direct current module short circuit retraction control guard method based on DSP as claimed in claim 1 is characterized in that, adjusts said current-limiting points according to said output voltage described in the step S3 said current-limiting points reduction is comprised:
According to the said current-limiting points of preset function relation adjustment between the output voltage of said direct current module and the said current-limiting points, said preset function relation satisfies diminishes said current-limiting points, and said preset function relation comprises linear relationship.
5. the direct current module short circuit retraction control guard method based on DSP as claimed in claim 1; It is characterized in that tertiary voltage threshold value described in current threshold described in second voltage threshold, the step S3 described in first voltage threshold, the step S1 described in preset current-limiting points, the step S1 and the step S3 is the host computer set point described in the step S1.
6. the direct current module short circuit retraction control guard method based on DSP as claimed in claim 5; It is characterized in that; Said direct current module is the circuit signal DC power supply, and said current threshold is set at 30 peaces to 34 peaces, said first voltage threshold and is set at 150 volts to 160 volts, said second voltage threshold to be set at 110 volts to 130 volts and said tertiary voltage threshold setting be 20 volts to 24 volts.
7. the direct current module short circuit retraction control protection system based on DSP is characterized in that, comprising:
The current-limiting points adjusting module; Be used for sending to said output current regulation module according to the preset current-limiting points of relation adjustment adjustment of the input voltage of said direct current module and preset first voltage threshold, preset second voltage threshold and with said current-limiting points; Said first voltage threshold is higher than said second voltage threshold; Said current-limiting points is the current value output current regulation module, is used to receive the current-limiting points of said current-limiting points adjusting module and the output current that the said current-limiting points of foundation is adjusted said direct current module;
Short circuit retraction module; Be used for when output voltage that said current-limiting points is higher than predetermined current threshold value and said direct current module is lower than preset tertiary voltage threshold value, adjust said current-limiting points according to said output voltage and said current-limiting points is reduced and call the output current that said output current regulation module is adjusted said direct current module.
8. the direct current module short circuit retraction control protection system based on DSP as claimed in claim 7 is characterized in that said current-limiting points adjusting module comprises:
The relation of the input voltage of judging said direct current module and preset first voltage threshold, preset second voltage threshold;
If the input current of said direct current module is higher than said first voltage threshold, then do not adjust said preset current-limiting points;
If the input voltage of said direct current module is lower than said second voltage threshold, then break off said direct current modular circuit;
If the input voltage of said direct current module is lower than said first voltage threshold and is higher than said second voltage threshold, then adjust said current-limiting points.
9. the direct current module short circuit retraction control protection system based on DSP as claimed in claim 7 is characterized in that the current-limiting points of adjustment described in the current-limiting points adjusting module comprises:
According to the said current-limiting points of the relation of the preset function between said current-limiting points and said input voltage adjustment, said preset function relation comprises linear relationship.
10. the direct current module short circuit retraction control protection system based on DSP as claimed in claim 7 is characterized in that, adjusts said current-limiting points according to said output voltage described in the short circuit retraction module said current-limiting points reduction is comprised:
According to the said current-limiting points of preset function relation adjustment between the output voltage of said direct current module and the said current-limiting points, said preset function relation satisfies diminishes said current-limiting points, and said preset function relation comprises linear relationship.
11. the direct current module short circuit retraction control protection system based on DSP as claimed in claim 7; It is characterized in that tertiary voltage threshold value described in current threshold described in second voltage threshold described in first voltage threshold, the current-limiting points adjusting module described in preset current-limiting points, the current-limiting points adjusting module, the short circuit retraction module and the short circuit retraction module is the host computer set point described in the current-limiting points adjusting module.
12. the direct current module short circuit retraction control protection system based on DSP as claimed in claim 11; It is characterized in that; Said direct current module is the circuit signal DC power supply, and said current threshold is set at 30 peaces to 34 peaces, said first voltage threshold and is set at 150 volts to 160 volts, said second voltage threshold to be set at 110 volts to 130 volts and said tertiary voltage threshold setting be 20 volts to 24 volts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102062145A CN102739026A (en) | 2012-06-18 | 2012-06-18 | Short circuit retraction control protection method and system for direct current module based on digital signal processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102062145A CN102739026A (en) | 2012-06-18 | 2012-06-18 | Short circuit retraction control protection method and system for direct current module based on digital signal processing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102739026A true CN102739026A (en) | 2012-10-17 |
Family
ID=46993986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102062145A Pending CN102739026A (en) | 2012-06-18 | 2012-06-18 | Short circuit retraction control protection method and system for direct current module based on digital signal processing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102739026A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107819394A (en) * | 2016-09-12 | 2018-03-20 | 力博特公司 | A kind of switch controlled method, apparatus and inverter |
| CN111697827A (en) * | 2020-06-17 | 2020-09-22 | 道崇电子科技（嘉兴）有限公司 | Circuit topology for sharing power transistors among multiple types of electronic circuits |
| CN112653099A (en) * | 2020-12-22 | 2021-04-13 | 深圳市禾望电气股份有限公司 | Wave-by-wave current limiting control method and system based on general MCU |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5986902A (en) * | 1998-06-16 | 1999-11-16 | Lucent Technologies Inc. | Integrated protection circuit, method of providing current-limiting and short-circuit protection and converter employing the same |
| CN1455306A (en) * | 2002-04-29 | 2003-11-12 | 深圳市中兴通讯股份有限公司 | Current-limiting protection device |
| CN101340149A (en) * | 2007-07-03 | 2009-01-07 | 尼克森微电子股份有限公司 | Output current limiting control apparatus having input compensation |
| CN102467148A (en) * | 2010-11-11 | 2012-05-23 | 中兴通讯股份有限公司 | Device and method for controlling approximately constant power of switching power supply |
-
2012
- 2012-06-18 CN CN2012102062145A patent/CN102739026A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5986902A (en) * | 1998-06-16 | 1999-11-16 | Lucent Technologies Inc. | Integrated protection circuit, method of providing current-limiting and short-circuit protection and converter employing the same |
| CN1455306A (en) * | 2002-04-29 | 2003-11-12 | 深圳市中兴通讯股份有限公司 | Current-limiting protection device |
| CN101340149A (en) * | 2007-07-03 | 2009-01-07 | 尼克森微电子股份有限公司 | Output current limiting control apparatus having input compensation |
| CN102467148A (en) * | 2010-11-11 | 2012-05-23 | 中兴通讯股份有限公司 | Device and method for controlling approximately constant power of switching power supply |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107819394A (en) * | 2016-09-12 | 2018-03-20 | 力博特公司 | A kind of switch controlled method, apparatus and inverter |
| CN111697827A (en) * | 2020-06-17 | 2020-09-22 | 道崇电子科技（嘉兴）有限公司 | Circuit topology for sharing power transistors among multiple types of electronic circuits |
| CN112653099A (en) * | 2020-12-22 | 2021-04-13 | 深圳市禾望电气股份有限公司 | Wave-by-wave current limiting control method and system based on general MCU |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9525290B2 (en) | Bypassable battery modules | |
| CN103152912B (en) | Modified high-efficiency light-emitting diode (LED) drive circuit and drive method | |
| KR102196898B1 (en) | Voltage and current control method and device of DC transmission system | |
| CN106786643B (en) | Fault current active control type current limiting system and its control method | |
| CN102352781B (en) | PWM is adopted to control to control system, the method and apparatus of bilateral servo actuator | |
| CN102520276B (en) | Integrated testing circuit for modular multi-level converter valve and control method of integrated testing circuit | |
| CN103219705B (en) | The short-circuit protection method of half bridge resonant transformer and device | |
| CN203674997U (en) | Rectifier circuit | |
| CN103138590B (en) | Current-limiting protection method and device of resonance circuit | |
| CN104184325A (en) | Rapid dynamic compensation control apparatus and control method of voltage control type DC/DC converter | |
| CN105207470A (en) | Intelligent direct-current conversion device and application system | |
| CN204575726U (en) | A kind of LED drive power detection system and equipment | |
| CN103515950B (en) | DC transmission system and Non Power Compensation Process thereof | |
| CN102739026A (en) | Short circuit retraction control protection method and system for direct current module based on digital signal processing | |
| CN104811109A (en) | Power generator power control system and method | |
| WO2003075430A1 (en) | Uninterruptible power supply | |
| EP3062432A1 (en) | Direct current power source and method of operation thereof | |
| CN102322303B (en) | Use two-way Delay control to control the method and system of topworks's drive current | |
| KR101430577B1 (en) | Voltage sag protector for three phase servo driver | |
| KR102630314B1 (en) | AC-DC converter employing high efficiency load sharing with parrallel structure | |
| CN203439864U (en) | Elevator control cabinet | |
| CN202421352U (en) | Integrated testing circuit for modular multi-level converter valve | |
| CN202856640U (en) | Switch power supply provided with high-precision overvoltage protection function | |
| CN116529998A (en) | Phase-shifting full-bridge converter | |
| KR102112077B1 (en) | Uninterruptible power supply with single winding of output winding and inverter winding |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20121017 |