CN205039514U - Effectively reduce energy -storage capacitor's circuit protector against power failure - Google Patents
Effectively reduce energy -storage capacitor's circuit protector against power failure Download PDFInfo
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- CN205039514U CN205039514U CN201520681436.1U CN201520681436U CN205039514U CN 205039514 U CN205039514 U CN 205039514U CN 201520681436 U CN201520681436 U CN 201520681436U CN 205039514 U CN205039514 U CN 205039514U
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Abstract
The utility model is suitable for a machine carries 28V direct -current input power supply circuit technical field, discloses an effectively reduce energy -storage capacitor's circuit protector against power failure, including the 1st DC -DC converter (1), the 2nd DC -DC converter (2), first diode (3), first resistor (4), second resistor (5), second diode (6), first condenser (7), direct current input port +IN, IN, DC output mouth + OUT, OUT, direct current input port's anode + IN and the 1st DC -DC converter (1) + an end of IN end, first diode (3) links to each other, direct current input port's negative terminal - IN and the 1st DC -DC converter (1) - IN end, the 1st DC -DC converter (1) - the b end of OUT end, first condenser (7), the 2nd DC -DC converter (2) - the IN end links to each other. The utility model discloses can improve energy -storage capacitor's voltage, reach the same electric 50ms protect function of falling when guaranteeing input + 22V, effectively reduce energy -storage capacitor, save power supply size and cost, alleviate power weight, the design is convenient, reliable high.
Description
Technical field
The utility model is applicable to airborne 28V direct-current input power supplying circuit engineering field, especially relates to a kind of power-down protection circuit of effective minimizing storage capacitor.
Background technology
Along with the development of aeronautical technology; the advanced dependence of airborne equipment to aircraft electrical power supply system is increasing; require that electric power system provides best in quality, reliable and stable power supply, require that airborne power supply has resistance to peak voltage, resistance to overvoltage surge, resistance to under-voltage surge and power down and maintains the defencive functions such as 50ms.
The direct current 28V Power convert of input is normally the output voltage that+5V ,+12V ,+15V ,+24V etc. are stable by airborne power supply, meets the various demands of airborne power consumption equipment.And the conversion of output voltage adopts the dc-dc of high reliability mostly; these dc-dc have certain input range; have input undervoltage defencive function, under input voltage is lower than the input voltage of its nominal in limited time, shutoff exports by dc-dc.Therefore when airborne power supply input undervoltage surge and power down 50ms, power supply can instantaneous no-output, affects the normal work of airborne power consumption equipment, and this just needs to increase under-voltage surge and power down 50ms defencive function in input.
Airborne power supply is under-voltage surge and power down 50ms defencive function, normally designs under the condition of nominal input direct-current+28V, is maintained by the storage capacitor electric discharge of airborne power supply inside.But along with the development of technology, increasing airborne power supply requires to have power down 50ms defencive function under the condition of input direct-current+22V, and needs continuous power down 3 times, every minor tick 500ms.The time that the storage capacitor electric discharge of airborne power supply maintains is and the voltage (V on storage capacitor capacity (C), storage capacitor
1), the lower limit (V of DC/DC converter input voltage
2), power (P) is relevant.
At the lower limit (V of storage capacitor (C), DC/DC converter input voltage
2) and power (P) is constant when, input+22V power down time, the voltage of storage capacitor (C) diminishes, then hold time also by corresponding reduction.Due to the lower limit (V of DC/DC converter input voltage
1) and power (P) can not change, if power down during input+22V, the still requirement of demand fulfillment power down 50ms, can adopt 2 kinds of modes: one be improve storage capacitor (C) capacity; Two is the voltage (V improving storage capacitor
1).The capacity improving storage capacitor (C) can increase the volume and weight of power supply, increases the cost of power supply simultaneously, controls to be very strict for volume and weight airborne power supply.Therefore by improving the voltage (V of storage capacitor
1) to improve that power down holds time be a kind of desirable mentality of designing.
Summary of the invention
Technical problem to be solved in the utility model is to provide a kind of power-down protection circuit of effective minimizing storage capacitor; by series boosting dc-dc on power supply major loop; the voltage of storage capacitor can be improved, reach identical power down when ensureing input+22V and hold time.
In order to realize the object of foregoing invention, the utility model have employed following technical scheme:
The power down protection of a kind of effective minimizing storage capacitor of the present utility model, comprises the first dc-dc (1), the second dc-dc (2), the first diode (3), the first resistor (4), the second resistor (5), the second diode (6), the first capacitor (7), direct-flow input end mouth+IN ,-IN, DC output end mouth+OUT ,-OUT;
Wherein anode+the IN of direct-flow input end mouth, + IN the end of the first dc-dc (1), the a end of the first diode (3), negative terminal-the IN of direct-flow input end mouth,-IN the end of the first dc-dc (1),-OUT the end of the first dc-dc (1), the b end of the first capacitor (7),-IN the end of the second dc-dc (2), + OUT the end of the first dc-dc (1), the a end of the second resistor (5), the a end of the second diode (6), + IN the end of the second dc-dc (2) is connected, the b end of the first diode (3), the a end of the first resistor (4) is connected, the b end of the first resistor (4), the b end of the second resistor (5), the b end of the second diode (6), the a end of the first capacitor (7) is connected,
Concrete, described direct-flow input end mouth comprises direct-flow input end mouth+IN ,-IN; + IN, the i.e. anode of direct-flow input end mouth;-IN, the i.e. negative terminal of direct-flow input end mouth.
Concrete, described DC output end mouth comprises DC output end mouth+OUT ,-OUT; + OUT, the i.e. anode of DC output end mouth;-OUT, the i.e. negative terminal of DC output end mouth.
The implication of+the IN ,-IN of the first dc-dc (1) and the second dc-dc (2) ,+OUT ,-OUT is :+IN is the input positive pole of dc-dc,-IN is the input negative pole of dc-dc, + OUT is the output cathode of dc-dc, and-OUT is the output negative pole of dc-dc;
The a end of the first diode (3), the second diode (6), the implication of b end are: a end is the negative electrode of diode, and b end is the anode of diode;
The a end of the first capacitor (7), the implication of b end are: a end is the positive pole of electric capacity, and b end is the negative pole of electric capacity.
By adopting technique scheme, the utility model has following beneficial effect:
A kind of power-down protection circuit of effective minimizing storage capacitor; by series boosting dc-dc on power supply input major loop; improve the voltage of storage capacitor; identical power down 50ms defencive function is reached when ensureing input+22V; effective minimizing storage capacitor; greatly save power volume and cost, alleviate power supply weight, design is convenient, reliably high.
Accompanying drawing explanation
Fig. 1 is the power-down protection circuit schematic diagram effectively reducing storage capacitor.
In figure, 1-first dc-dc, 2-second dc-dc, 3-first diode, 4-first resistor, 5-second resistor, 6-second diode, 7-first capacitor.
Embodiment
Below in conjunction with accompanying drawing, further explanation is explained to this patent.But the protection range of this patent is not limited to concrete execution mode.
Embodiment 1
As shown in Figure 1, the power-down protection circuit of a kind of effective minimizing storage capacitor of the present utility model, comprises the first dc-dc (1), the second dc-dc (2), the first diode (3), the first resistor (4), the second resistor (5), the second diode (6), the first capacitor (7), direct-flow input end mouth+IN ,-IN, DC output end mouth+OUT ,-OUT;
Wherein anode+the IN of direct-flow input end mouth, + IN the end of the first dc-dc (1), the a end of the first diode (3), negative terminal-the IN of direct-flow input end mouth,-IN the end of the first dc-dc (1),-OUT the end of the first dc-dc (1), the b end of the first capacitor (7),-IN the end of the second dc-dc (2), + OUT the end of the first dc-dc (1), the a end of the second resistor (5), the a end of the second diode (6), + IN the end of the second dc-dc (2) is connected, the b end of the first diode (3), the a end of the first resistor (4) is connected, the b end of the first resistor (4), the b end of the second resistor (5), the b end of the second diode (6), the a end of the first capacitor (7) is connected,
The power-down protection circuit of effective minimizing storage capacitor of the present utility model; its working method is: connect direct voltage moment between input port+IN and-IN; charged to the first electric capacity (7) by the first diode (3), the first resistance (4); now the input voltage of the first dc-dc (1) is lower than the lower limit of its input voltage; first dc-dc (1) no-output, therefore the second dc-dc (2) also no-output.Voltage between+IN and-IN is greater than the input voltage lower limit of the first dc-dc (1), first dc-dc (1) has output, because the first dc-dc (1) is boost module, output voltage is greater than input voltage, is now charged to the first electric capacity (7) by the second resistor (5).When the output voltage of the first dc-dc (1) reach the input voltage of the second dc-dc (2) lower in limited time, the second dc-dc (2) exports normal.When input voltage power down, first dc-dc (1) does not work, now the first capacitor (7) is by the second diode (6) to the second dc-dc (2) power supply, ensures that the second dc-dc (2) can normally work 50ms after input+22V power down.
Claims (4)
1. effectively reduce a power-down protection circuit for storage capacitor, comprise the first dc-dc (1), the second dc-dc (2), the first diode (3), the first resistor (4), the second resistor (5), the second diode (6), the first capacitor (7), direct-flow input end mouth+IN ,-IN, DC output end mouth+OUT ,-OUT; It is characterized in that: the anode+IN of direct-flow input end mouth wherein holds with+the IN of the first dc-dc (1), a of the first diode (3) holds and is connected; Negative terminal-the IN of direct-flow input end mouth holds with-the IN of the first dc-dc (1) ,-OUT of the first dc-dc (1) holds, the b of the first capacitor (7) holds ,-the IN of the second dc-dc (2) holds and is connected;
+ OUT the end of the first dc-dc (1) is held with a of the second resistor (5), a of the second diode (6) holds ,+the IN of the second dc-dc (2) holds and is connected, the b end of the first diode (3) is held with a of the first resistor (4) and is connected, and the b end of the first resistor (4) is held with the b of the second resistor (5), the b of the second diode (6) holds, a of the first capacitor (7) holds and is connected.
2. the power-down protection circuit of a kind of effective minimizing storage capacitor according to claim 1, is characterized in that: described direct-flow input end mouth comprises: the anode+IN of direct-flow input end mouth, the negative terminal-IN of direct-flow input end mouth.
3. the power-down protection circuit of a kind of effective minimizing storage capacitor according to claim 1, is characterized in that: described DC output end mouth comprises: the anode+OUT of DC output end mouth, the negative terminal-OUT of DC output end mouth.
4. the power-down protection circuit of a kind of effective minimizing storage capacitor according to claim 1; it is characterized in that: described the first dc-dc (1) and the port of the second dc-dc (2); comprise: the input positive pole+IN of dc-dc, the input negative pole-IN of dc-dc; output cathode+the OUT of dc-dc, the output negative pole-OUT of dc-dc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520681436.1U CN205039514U (en) | 2015-09-06 | 2015-09-06 | Effectively reduce energy -storage capacitor's circuit protector against power failure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520681436.1U CN205039514U (en) | 2015-09-06 | 2015-09-06 | Effectively reduce energy -storage capacitor's circuit protector against power failure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205039514U true CN205039514U (en) | 2016-02-17 |
Family
ID=55298385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520681436.1U Expired - Fee Related CN205039514U (en) | 2015-09-06 | 2015-09-06 | Effectively reduce energy -storage capacitor's circuit protector against power failure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205039514U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350653A (en) * | 2019-07-15 | 2019-10-18 | 西安应用光学研究所 | A kind of stable DC power supply conversion control circuit for airborne photoelectric stabilized platform |
| CN113036899A (en) * | 2021-03-10 | 2021-06-25 | 中国科学院长春光学精密机械与物理研究所 | Undervoltage and power-down protection system of aviation photoelectric equipment |
| CN113315360A (en) * | 2021-05-07 | 2021-08-27 | 北京军陶科技有限公司 | Anti-transient-outage power supply and equipment based on capacitor boosting energy storage |
-
2015
- 2015-09-06 CN CN201520681436.1U patent/CN205039514U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110350653A (en) * | 2019-07-15 | 2019-10-18 | 西安应用光学研究所 | A kind of stable DC power supply conversion control circuit for airborne photoelectric stabilized platform |
| CN113036899A (en) * | 2021-03-10 | 2021-06-25 | 中国科学院长春光学精密机械与物理研究所 | Undervoltage and power-down protection system of aviation photoelectric equipment |
| CN113315360A (en) * | 2021-05-07 | 2021-08-27 | 北京军陶科技有限公司 | Anti-transient-outage power supply and equipment based on capacitor boosting energy storage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160217 Termination date: 20190906 |