CN201918695U - Low-voltage protection circuit for airborne computer - Google Patents
Low-voltage protection circuit for airborne computer Download PDFInfo
- Publication number
- CN201918695U CN201918695U CN2010205514583U CN201020551458U CN201918695U CN 201918695 U CN201918695 U CN 201918695U CN 2010205514583 U CN2010205514583 U CN 2010205514583U CN 201020551458 U CN201020551458 U CN 201020551458U CN 201918695 U CN201918695 U CN 201918695U
- Authority
- CN
- China
- Prior art keywords
- power supply
- airborne computer
- storage capacitor
- power
- diode
- 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.)
- Expired - Lifetime
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Abstract
Disclosed is a low-voltage protection circuit for an airborne computer. The utility model is characterized in that the circuit comprises a main diode, a current-limiting resistor, a power-storing capacitor, a follow-current diode, a power supply and an airborne compute power supply; the power supply supplies power for the airborne computer power supply through one path of the main diode, the current-limiting resistor and the follow-current diode are connected with each other in parallel and then is connected with the power-storing capacitor to form a power-storing loop, the power-storing capacitor is charged by the power supply through the current-limiting resistor, and the power-storing capacitor supplies power for the airborne computer power supply through the follow-current diode when in instantaneous power-down of the power supply. When in instantaneous power-down of the input voltage, the power-storing capacitor of the circuit can guarantee that the power supply of the post airborne computer works in normal. The circuit is simple and has high reliability and good thermal adaptability.
Description
Technical field
The utility model relates to a kind of tolerance airborne computer power supply under-voltage protecting circuit, and this circuit and airborne computer power supply use together, is used to solve the airborne computer power supply and tolerates under-voltage.
Background technology
The airborne power consumption equipment of " GJB181-96 aviation power supply characteristic reaches the requirement to power consumption equipment " regulation need tolerate direct current 8V, and the duration is the under-voltage surge of 50ms.In order to make the airborne computer can operate as normal under the situation of under-voltage surge, obliterated data not, traditional solution is, when undervoltage condition appears in busbar voltage, adopt the mode of switching battery to give the power supply of airborne computer power supply, and powered battery has following shortcoming: 1) life-span is short; 2) need periodic replacement; 3) easily pollute; 4) poor to thermal adaptability.At battery powered above-mentioned shortcoming, the present invention has provided a kind of new circuit, is used to solve the airborne computer power supply and tolerates under-voltage surge.
The utility model content
Technical problem to be solved in the utility model is to overcome the deficiency of above-mentioned prior art, a kind of front end that is used for the airborne computer power supply is provided, solve the present supplying cell life-span short, need periodic replacement, easily pollute, to the airborne computer under-voltage protecting circuit of shortcomings such as thermal adaptability difference.
A kind of airborne computer under-voltage protecting circuit that provides according to the utility model; comprise main diode; current-limiting resistance; storage capacitor; fly-wheel diode; power supply and airborne computer power supply; described power supply is given described airborne computer power supply power supply by described main diode one tunnel; described current-limiting resistance with constitute tank circuit with described energy storage capacitor in series again after described fly-wheel diode is in parallel; described power supply is given described storage capacitor charging by described current-limiting resistance; when described power supply transient state power down, described storage capacitor is given described airborne computer power supply power supply by described afterflow diode.
A kind of airborne computer under-voltage protecting circuit that provides according to the utility model also has following attached technical characterictic:
Described storage capacitor is the high energy tantalum capacitor.
The rated output power of described airborne computer power supply is P
0, efficient is η, minimum operating voltage is U
1, the current voltage of storage capacitor is U
2, storage capacitor is C, and fly-wheel diode is an ideal diode, and the power supply transient state power down time is t
o, then the capacitor's capacity of storage capacitor C is:
A kind of airborne computer under-voltage protecting circuit that provides according to the utility model compared with prior art has following advantage: when the power down of input voltage transient state; storage capacitor in the utility model can make back level airborne computer power supply operate as normal; this circuit is simple; the reliability height, thermal adaptability is good.
Description of drawings
Fig. 1 is a circuit diagram of the present utility model.
Embodiment
Referring to Fig. 1; a kind of airborne computer under-voltage protecting circuit that provides according to the utility model; comprise main diode 1; current-limiting resistance 2; storage capacitor 3; fly-wheel diode 4; power supply 5 and airborne computer power supply 6; described power supply 5 is given described airborne computer power supply 6 power supplies by described main diode 1 one tunnel; connect with described storage capacitor 3 again after described current-limiting resistance 2 and described fly-wheel diode 4 parallel connections and constitute tank circuit; described power supply 5 is given described storage capacitor 3 chargings by described current-limiting resistance 2; when described power supply 5 transient state power down, described storage capacitor 3 is given described airborne computer power supply 6 power supplies by described afterflow diode 4.Described storage capacitor 3 is the high energy tantalum capacitor.The utility model storage capacitor 3 when operate as normal charges all the time, and when the power down of input voltage transient state, storage capacitor 3 is given back level airborne computer power supply 6 power supplies by afterflow diode 4, to keep the operate as normal of back level airborne computer power supply 6.This circuit structure is simple, and it is more reliable to work, and need not to increase battery, has also just eliminated the problem that battery need be changed.Simultaneously, because circuit working is fast reliable more.
In the foregoing description that the utility model provides,, need the reasonably amount of capacity of design storage capacitor 3 in order to satisfy the work of back level airborne computer power supply.The rated output power of described airborne computer power supply is P
0, efficient is η, minimum operating voltage is U
1, the current voltage of storage capacitor is U
2, storage capacitor is C, and fly-wheel diode is an ideal diode, and the power supply transient state power down time is t
o, then the capacitor's capacity of storage capacitor C is:
Work as P
0, U
2, U
1And t
oWhen determining, can calculate power supply transient state power down t by formula
oThe size of Shi Suoxu storage capacitor appearance value.Postulated mechanism borne computer power supply rated output power is 20W, efficient is 80%, and the minimum operating voltage of airborne computer power supply is 18V, and the current voltage of storage capacitor is 28V, the bus power supply transient state power down time is 0.05s, and then the capacitance minimum that can draw storage capacitor according to formula (2) is:
At airborne computer power supply front end, can choose withstand voltagely for 80V, capacitance is the high energy tantalum capacitor that is not less than 5400 μ F, the requirement in can realization example in application of practical project.
Claims (3)
1. airborne computer under-voltage protecting circuit; it is characterized in that: comprise main diode (1); current-limiting resistance (2); storage capacitor (3); fly-wheel diode (4); power supply (5) and airborne computer power supply (6); described power supply (5) is given described airborne computer power supply (6) power supply by described main diode (1) a tunnel; connect with described storage capacitor (3) again after described current-limiting resistance (2) and described fly-wheel diode (4) parallel connection and constitute tank circuit; described power supply (5) is given described storage capacitor (3) charging by described current-limiting resistance (2); when described power supply (5) transient state power down, described storage capacitor (3) is given described airborne computer power supply (6) power supply by described afterflow diode (4).
2. a kind of airborne computer under-voltage protecting circuit as claimed in claim 1 is characterized in that: described storage capacitor (3) is the high energy tantalum capacitor.
3. a kind of airborne computer under-voltage protecting circuit as claimed in claim 1 is characterized in that: the rated output power of described airborne computer power supply is P
0, efficient is η, minimum operating voltage is U
1, the current voltage of storage capacitor is U
2, storage capacitor is C, and fly-wheel diode is an ideal diode, and the power supply transient state power down time is t
o, then the capacitor's capacity of storage capacitor C is:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205514583U CN201918695U (en) | 2010-09-29 | 2010-09-29 | Low-voltage protection circuit for airborne computer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205514583U CN201918695U (en) | 2010-09-29 | 2010-09-29 | Low-voltage protection circuit for airborne computer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201918695U true CN201918695U (en) | 2011-08-03 |
Family
ID=44418485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205514583U Expired - Lifetime CN201918695U (en) | 2010-09-29 | 2010-09-29 | Low-voltage protection circuit for airborne computer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201918695U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024581A (en) * | 2015-08-07 | 2015-11-04 | 上海沪工焊接集团股份有限公司 | Peak absorption circuit and IGBT full-bridge inverter circuit |
| CN111766929A (en) * | 2020-06-12 | 2020-10-13 | 安徽华米信息科技有限公司 | Reset circuit, method, device and electronic product |
| 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 |
-
2010
- 2010-09-29 CN CN2010205514583U patent/CN201918695U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105024581A (en) * | 2015-08-07 | 2015-11-04 | 上海沪工焊接集团股份有限公司 | Peak absorption circuit and IGBT full-bridge inverter circuit |
| CN105024581B (en) * | 2015-08-07 | 2018-03-09 | 上海沪工焊接集团股份有限公司 | IGBT full bridge inverters |
| CN111766929A (en) * | 2020-06-12 | 2020-10-13 | 安徽华米信息科技有限公司 | Reset circuit, method, device and electronic product |
| 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110803 |