CN201797293U - Anti-surge protection circuit for aviation direct current power supply - Google Patents
Anti-surge protection circuit for aviation direct current power supply Download PDFInfo
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- CN201797293U CN201797293U CN2010205111347U CN201020511134U CN201797293U CN 201797293 U CN201797293 U CN 201797293U CN 2010205111347 U CN2010205111347 U CN 2010205111347U CN 201020511134 U CN201020511134 U CN 201020511134U CN 201797293 U CN201797293 U CN 201797293U
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Abstract
The utility model relates to an anti-surge protection circuit for an aviation direct current power supply. The anti-surge protection circuit comprises an overvoltage sampling circuit, an undervoltage sampling circuit, an overvoltage protection unit, an undervoltage protection unit, an electronic switch and an energy storage unit, wherein the overvoltage sampling circuit acquires an overvoltage signal of the direct current power supply and inputs the overvoltage signal to the overvoltage protection unit; the undervoltage sampling circuit acquires an undervoltage signal of the direct current power supply and inputs the undervoltage signal to the undervoltage protection unit; the overvoltage protection unit and the undervoltage protection unit control the on/off of the electronic switch; the electronic switch controls the on/off of the direct current power supply; and the energy storage unit provides an output direct current power supply. The undervoltage surge and the overvoltage surge of an aviation direct current power supply bus are protected respectively, so that the circuit is simple and effective, and the size, weight and cost of the anti-surge protection circuit for the aviation direct current power supply can be reduced. The anti-surge protection circuit for the aviation direct current power supply can be widely applied to direct current power supply occasions in an aviation direct current power supply system.
Description
Technical field
The utility model relates to a kind of aviation DC power-supply system antisurge protective circuit, particularly a kind of protective circuit that is used for the antisurge of aviation DC power supply.
Background technology
Different with traditional electric power system, the aviation electric power system has surge voltage and drop-off voltage in a big way, need live through under-voltage surge, failsafe as the direct current secondary power supply of various avionic device power supply units.The direct current secondary power supply that is applied to the aviation electric power system is general to adopt three kinds of working methods to live through under-voltage surge voltage: the one, and additional circuit does not directly bear surge voltage; The 2nd, add auxiliary circuit, make the input voltage of DC power supply keep constant; The 3rd, add auxiliary circuit, when the overvoltage surge, make the input voltage of direct voltage constant, and when under-voltage (falling) no matter.And there is different shortcomings in these three kinds of modes: first kind of situation must strengthen the electric pressure of components and parts, increases the volume of cost and power supply greatly; Second kind of situation can increase extra loss, also needs to consider radiating treatment under the necessary situation, also increases volume in addition; The third situation can increase extra loss.
The utility model content
Technical problem to be solved in the utility model is to overcome the deficiency of above-mentioned prior art, provides a kind of under the situation that does not increase loss, guarantee DC power supply can be in the aviation electric power system antisurge protective circuit that is used for the aviation DC power supply of operate as normal.
The antisurge protective circuit that is used for the aviation DC power supply that provides according to the utility model; comprise the overvoltage sample circuit; under-voltage sample circuit; Overvoltage protecting unit; the under-voltage protection unit; electronic switch and energy-storage units; described overvoltage sample circuit is gathered DC power supply overvoltage signal; and the overvoltage signal is input to described Overvoltage protecting unit; described under-voltage sample circuit is gathered the under-voltage signal of DC power supply; and under-voltage signal is input to described under-voltage protection unit; described Overvoltage protecting unit and the described electronic switch break-make of described under-voltage protection unit controls; the break-make of described electronic switch control DC power supply, described energy-storage units provides the output DC source.
The antisurge protective circuit that is used for the aviation DC power supply that provides according to the utility model also has following attached technical characterictic:
Described overvoltage sample circuit is made of resistance R 1 and resistance R 2 series connection, and output is positioned at the common port of resistance R 1 and resistance R 2.
Described Overvoltage protecting unit comprises resistance R 5, resistance R 6, resistance R 7, diode D1, diode D2 and operational amplifier U1, and wherein resistance R 5 one is terminated at the common port of resistance R 1, resistance R 2, and the other end is connected to the negative phase end of operational amplifier U1; The positive terminal of resistance R 6 one termination operational amplifier U1, the given reference voltage V of another termination
RefResistance R 7 one terminates at the positive terminal of operational amplifier U1, the anode of another terminating diode D1; The anode of diode D1 connects the output of operational amplifier U1, and links to each other with the negative electrode of diode D2.
Described under-voltage sample circuit is made of resistance R 3 and resistance R 4 series connection, and output is positioned at the common port of circuit R3 and resistance R 4.
Described under-voltage protection unit comprises resistance R 9, resistance R 10, diode D3, diode D4 and operational amplifier U2, and wherein resistance R 9 one is terminated at the common port of resistance R 3, resistance R 4, and the other end is connected to the positive terminal of operational amplifier U2; The negative termination V of operational amplifier U2
RefResistance R 10 1 terminates at the positive terminal of operational amplifier U1, the anode of another terminating diode D3; The anode of diode D3 connects the output of operational amplifier U2, and links to each other with the negative electrode of diode D4.
The anode of diode D4 links to each other with the anode of diode D2, and the anode of diode D2 and diode D4 links to each other with pull-up resistor R8, the supply power voltage VCC of the other end concatenation operation amplifier of pull-up resistor R8.
Described electronic switch is a metal-oxide-semiconductor, and the gate pole of electronic switch Q1 links to each other with the common point of diode D2 with pull-up resistor R8, and the source electrode of electronic switch Q1 links to each other with the negative terminal of input voltage vin.
Described energy-storage units is charge and discharge capacitance C1, and the drain electrode of electronic switch Q1 links to each other with an end of capacitor C 1, and common port links to each other with the negative pole of output voltage V o; The other end of capacitor C 1 links to each other with the anode of the anode of input voltage vin, output voltage V o.
A kind of antisurge protective circuit that is used for the aviation DC power supply that provides according to the utility model compared with prior art has following advantage: the utility model is by detecting the overvoltage or the under-voltage signal controlling electronic switch break-make of DC power supply; thereby when surge occurring, cut off DC power supply; guarantee safety; energy-storage units is set then can when cutting off the electricity supply, provides DC power supply, guarantee that power supply needs.Therefore; the input voltage that the utility model does not need the aviation DC power supply must keep when surge voltage appears in dc bus is constant; do not need to improve the electric current and voltage grade of internal components yet; design and develop difficulty thereby simplified, help reducing volume, weight and the cost of aviation DC power supply antisurge protective circuit.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
Referring to Fig. 1; a kind of embodiment that is used for the antisurge protective circuit of aviation DC power supply that provides at the utility model; comprise overvoltage sample circuit 20; under-voltage sample circuit 24; Overvoltage protecting unit 21; under-voltage protection unit 25; electronic switch 22 and energy-storage units 23; described overvoltage sample circuit is gathered DC power supply overvoltage signal; and the overvoltage signal is input to described Overvoltage protecting unit; described under-voltage sample circuit is gathered the under-voltage signal of DC power supply; and under-voltage signal is input to described under-voltage protection unit; described Overvoltage protecting unit and the described electronic switch break-make of described under-voltage protection unit controls; the break-make of described electronic switch control DC power supply, described energy-storage units provides the output DC source.Described electronic switch inserts in direct current power source supplying power, and it can control the break-make of DC power supply.The utility model is according to overvoltage or under-voltage signal controlling electronic switch break-make, thereby can cut off or connect DC power supply, when surge voltage occurring, cuts off DC power supply, prevents that surge voltage from damaging.Described energy-storage units can provide the DC power supply of certain hour when cutting off DC power supply, guarantee the work of electronic component.When restoring electricity, it can charge again, for action is next time prepared.
Referring to Fig. 1, in the foregoing description that the utility model provides, described overvoltage sample circuit 20 is made of resistance R 1 and resistance R 2 series connection, and output is positioned at the common port of resistance R 1 and resistance R 2.Resistance R 1 one ends link to each other with resistance R 2, and the other end just links to each other with input voltage; Resistance R 2 other ends and input voltage negative connect.Thereby input DC power is carried out the overvoltage sampling.
Referring to Fig. 1, in the foregoing description that the utility model provides, described Overvoltage protecting unit 21 comprises resistance R 5, resistance R 6, resistance R 7, diode D1, diode D2 and operational amplifier U1, wherein resistance R 5 one is terminated at the common port of resistance R 1, resistance R 2, and the other end is connected to the negative phase end of operational amplifier U1; The positive terminal of resistance R 6 one termination operational amplifier U1, the given reference voltage V of another termination
RefResistance R 7 one terminates at the positive terminal of operational amplifier U1, the anode of another terminating diode D1; The anode of diode D1 connects the output of operational amplifier U1, and links to each other with the negative electrode of diode D2.Overvoltage protecting unit 21 compares the overvoltage signal and the reference voltage of sampling, produces comparing result.
Referring to Fig. 1, in the foregoing description that the utility model provides, described under-voltage sample circuit 24 is made of resistance R 3 and resistance R 4 series connection, and output is positioned at the common port of circuit R3 and resistance R 4.Resistance R 3 one ends link to each other with resistance R 4, and the other end just links to each other with input voltage; Resistance R 4 other ends and input voltage negative connect, thereby input DC power is carried out under-voltage sampling.
Referring to Fig. 1, in the foregoing description that the utility model provides, described under-voltage protection unit 25 comprises resistance R 9, resistance R 10, diode D3, diode D4 and operational amplifier U2, wherein resistance R 9 one is terminated at the common port of resistance R 3, resistance R 4, and the other end is connected to the positive terminal of operational amplifier U2; The negative termination V of operational amplifier U2
RefResistance R 10 1 terminates at the positive terminal of operational amplifier U1, the anode of another terminating diode D3; The anode of diode D3 connects the output of operational amplifier U2, and links to each other with the negative electrode of diode D4.Under-voltage signal and the reference voltage that to sample in under-voltage protection unit 25 compare, and produce comparing result.
Referring to Fig. 1, in the foregoing description that the utility model provides, the anode of diode D4 links to each other with the anode of diode D2, and the anode of diode D2 and diode D4 links to each other with pull-up resistor R8, the supply power voltage VCC of the other end concatenation operation amplifier of pull-up resistor R8.Described pull-up resistor R8 improves the output voltage of operational amplifier, thus control electronic switch break-make.
Referring to Fig. 1, in the foregoing description that the utility model provides, described electronic switch is a metal-oxide-semiconductor, and the gate pole of electronic switch Q1 links to each other with the common point of diode D2 with pull-up resistor R8, and the source electrode of electronic switch Q1 links to each other with the negative terminal of input voltage vin.
Referring to Fig. 1, in the foregoing description that the utility model provides, described energy-storage units is charge and discharge capacitance C1, and the drain electrode of electronic switch Q1 links to each other with an end of capacitor C 1, and common port links to each other with the negative pole of output voltage V o; The other end of capacitor C 1 links to each other with the anode of the anode of input voltage vin, output voltage V o.Input voltage can charge to capacitor C 1, after electronic switch Q1 cuts off DC power supply, and the DC power supply that can provide, the continuity of assurance electronic component work.
Claims (8)
1. antisurge protective circuit that is used for the aviation DC power supply; it is characterized in that: comprise the overvoltage sample circuit; under-voltage sample circuit; Overvoltage protecting unit; the under-voltage protection unit; electronic switch and energy-storage units; described overvoltage sample circuit is gathered DC power supply overvoltage signal; and the overvoltage signal is input to described Overvoltage protecting unit; described under-voltage sample circuit is gathered the under-voltage signal of DC power supply; and under-voltage signal is input to described under-voltage protection unit; described Overvoltage protecting unit and the described electronic switch break-make of described under-voltage protection unit controls; the break-make of described electronic switch control DC power supply, described energy-storage units provides the output DC source.
2. a kind of antisurge protective circuit that is used for the aviation DC power supply as claimed in claim 1 is characterized in that: described overvoltage sample circuit is made of resistance R 1 and resistance R 2 series connection, and output is positioned at the common port of resistance R 1 and resistance R 2.
3. a kind of antisurge protective circuit that is used for the aviation DC power supply as claimed in claim 2, it is characterized in that: described Overvoltage protecting unit comprises resistance R 5, resistance R 6, resistance R 7, diode D1, diode D2 and operational amplifier U1, wherein resistance R 5 one is terminated at the common port of resistance R 1, resistance R 2, and the other end is connected to the negative phase end of operational amplifier U1; The positive terminal of resistance R 6 one termination operational amplifier U1, the given reference voltage V of another termination
RefResistance R 7 one terminates at the positive terminal of operational amplifier U1, the anode of another terminating diode D1; The anode of diode D1 connects the output of operational amplifier U1, and links to each other with the negative electrode of diode D2.
4. a kind of antisurge protective circuit that is used for the aviation DC power supply as claimed in claim 3 is characterized in that: described under-voltage sample circuit is made of resistance R 3 and resistance R 4 series connection, and output is positioned at the common port of circuit R3 and resistance R 4.
5. a kind of antisurge protective circuit that is used for the aviation DC power supply as claimed in claim 4, it is characterized in that: described under-voltage protection unit comprises resistance R 9, resistance R 10, diode D3, diode D4 and operational amplifier U2, wherein resistance R 9 one is terminated at the common port of resistance R 3, resistance R 4, and the other end is connected to the positive terminal of operational amplifier U2; The negative termination V of operational amplifier U2
RefResistance R 10 1 terminates at the positive terminal of operational amplifier U1, the anode of another terminating diode D3; The anode of diode D3 connects the output of operational amplifier U2, and links to each other with the negative electrode of diode D4.
6. a kind of antisurge protective circuit that is used for the aviation DC power supply as claimed in claim 5; it is characterized in that: the anode of diode D4 links to each other with the anode of diode D2; the anode of diode D2 and diode D4 links to each other with pull-up resistor R8, the supply power voltage VCC of the other end concatenation operation amplifier of pull-up resistor R8.
7. a kind of antisurge protective circuit that is used for the aviation DC power supply as claimed in claim 6; it is characterized in that: described electronic switch is a metal-oxide-semiconductor; the gate pole of electronic switch Q1 links to each other with the common point of diode D2 with pull-up resistor R8, and the source electrode of electronic switch Q1 links to each other with the negative terminal of input voltage vin.
8. a kind of antisurge protective circuit that is used for the aviation DC power supply as claimed in claim 7, it is characterized in that: described energy-storage units is charge and discharge capacitance C1, the drain electrode of electronic switch Q1 links to each other with an end of capacitor C 1, and common port links to each other with the negative pole of output voltage V o; The other end of capacitor C 1 links to each other with the anode of the anode of input voltage vin, output voltage V o.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205111347U CN201797293U (en) | 2010-08-31 | 2010-08-31 | Anti-surge protection circuit for aviation direct current power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205111347U CN201797293U (en) | 2010-08-31 | 2010-08-31 | Anti-surge protection circuit for aviation direct current power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201797293U true CN201797293U (en) | 2011-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205111347U Expired - Lifetime CN201797293U (en) | 2010-08-31 | 2010-08-31 | Anti-surge protection circuit for aviation direct current power supply |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633908A (en) * | 2014-10-30 | 2016-06-01 | 华硕电脑股份有限公司 | Electronic device and power source protection method |
| CN105932645A (en) * | 2016-05-31 | 2016-09-07 | 联想(北京)有限公司 | Switching power supply and electronic equipment |
| CN106786357A (en) * | 2017-02-14 | 2017-05-31 | 兰州空间技术物理研究所 | The spacecraft controllable restoring circuit of bus under-voltage protection |
| CN108471229A (en) * | 2018-05-03 | 2018-08-31 | 中国电子科技集团公司第二十九研究所 | A kind of surge restraint circuit of double closed loops |
| EP3240133B1 (en) * | 2016-04-28 | 2018-12-12 | Siemens Aktiengesellschaft | Bus participants |
| CN110850953A (en) * | 2019-11-14 | 2020-02-28 | 中国航空工业集团公司西安航空计算技术研究所 | Overvoltage-resistant surge circuit |
| CN111212504A (en) * | 2020-03-27 | 2020-05-29 | 杰华特微电子（杭州）有限公司 | BIFRED converter, control method thereof and LED drive circuit applying BIFRED converter |
| CN111405719A (en) * | 2020-03-27 | 2020-07-10 | 杰华特微电子（杭州）有限公司 | BIFRED converter, control method thereof and L ED driving circuit applying BIFRED converter |
-
2010
- 2010-08-31 CN CN2010205111347U patent/CN201797293U/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105633908B (en) * | 2014-10-30 | 2018-08-31 | 华硕电脑股份有限公司 | Electronic device and power protection method |
| CN105633908A (en) * | 2014-10-30 | 2016-06-01 | 华硕电脑股份有限公司 | Electronic device and power source protection method |
| US10666456B2 (en) | 2016-04-28 | 2020-05-26 | Siemens Aktiengesellschaft | Arrangement with at least two bus subscribers |
| EP3240133B1 (en) * | 2016-04-28 | 2018-12-12 | Siemens Aktiengesellschaft | Bus participants |
| CN105932645A (en) * | 2016-05-31 | 2016-09-07 | 联想(北京)有限公司 | Switching power supply and electronic equipment |
| CN106786357A (en) * | 2017-02-14 | 2017-05-31 | 兰州空间技术物理研究所 | The spacecraft controllable restoring circuit of bus under-voltage protection |
| CN106786357B (en) * | 2017-02-14 | 2019-03-12 | 兰州空间技术物理研究所 | The spacecraft controllable restoring circuit of bus under-voltage protection |
| CN108471229A (en) * | 2018-05-03 | 2018-08-31 | 中国电子科技集团公司第二十九研究所 | A kind of surge restraint circuit of double closed loops |
| CN108471229B (en) * | 2018-05-03 | 2020-05-26 | 中国电子科技集团公司第二十九研究所 | Surge suppression circuit of two independent closed loops |
| CN110850953A (en) * | 2019-11-14 | 2020-02-28 | 中国航空工业集团公司西安航空计算技术研究所 | Overvoltage-resistant surge circuit |
| CN111212504A (en) * | 2020-03-27 | 2020-05-29 | 杰华特微电子（杭州）有限公司 | BIFRED converter, control method thereof and LED drive circuit applying BIFRED converter |
| CN111405719A (en) * | 2020-03-27 | 2020-07-10 | 杰华特微电子（杭州）有限公司 | BIFRED converter, control method thereof and L ED driving circuit applying BIFRED converter |
| CN111212504B (en) * | 2020-03-27 | 2023-10-27 | 杰华特微电子股份有限公司 | BIFRED converter, control method thereof and LED driving circuit applying BIFRED converter |
| CN111405719B (en) * | 2020-03-27 | 2023-10-27 | 杰华特微电子股份有限公司 | BIFRED converter, control method thereof and LED driving circuit applying BIFRED converter |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110413 |