CN209217707U - The surge suppressor of function is kept with power down - Google Patents
The surge suppressor of function is kept with power down Download PDFInfo
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- CN209217707U CN209217707U CN201821763929.XU CN201821763929U CN209217707U CN 209217707 U CN209217707 U CN 209217707U CN 201821763929 U CN201821763929 U CN 201821763929U CN 209217707 U CN209217707 U CN 209217707U
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Abstract
The utility model discloses a kind of surge suppressors that function is kept with power down, charge switch module and power down is maintained to maintain discharge switch module including surge suppression modules, power down, surge suppression modules are used to make intermediate-bus voltage keep constant when surge occurs.Power down maintains charge switch module to be used to make intermediate-bus voltage charge capacitor C2 when input voltage is higher than certain value.Power down maintains discharge switch module to be used to make capacitor C2 surge suppression modules input terminal discharge when input voltage is lower than certain value.The utility model realizes the maintenance of inhibition and interruption of the airborne equipment to surge.
Description
Technical field
The utility model belongs to power supply control field, and in particular to a kind of surge suppressor that function is kept with power down.
Background technique
Safe and reliable airplane power source is important leverage of the aircraft when executing and combat mission.In airborne electrical equipment
In, generally require have the function of that normal surge voltage inhibits, power down maintains in electrical equipment secondary power supply conversion circuit.
Normal voltage surge refers to the voltage change from controlled steady state value, the variation by electric supply system intrinsic tune
Section causes, and disturbs and generates as caused by the system worked wells such as load transfer, adjuster corrective action.National military standard GJB-
It voltage of the 181A and civil aircraft DO-160G to the normal surge of 28V DC power supply and improper surge and holds time
It is provided.When normal voltage surge occurs for 28V DC power supply, secondary power supply should be able to be without damage and be continually and steadily supplied
Electricity, to ensure that the work of electronic equipment does not pause.
In aircraft 28V DC power-supply system, the power supply mode of redundancy is generallyd use, when normal work is supplied by main power source
Electricity；In engine start, breaks down etc. in special circumstances, powered by secondary power systems such as batteries, therefore power and exist
The case where power supply is converted.National military standard GJB-181A regulation, in busbar or power supply transition status, power interruption time must not be big
In 50ms.And provided in civil aircraft DO-160G, for A class equipment it is possible that being up to the break period of 200ms, B class equipment may
Occur being up to the break period of 50ms, D class and Z class equipment it is possible that being up to the break period of 1s.For avionics system
Speech, power failure may cause loss of data, and equipment, which is restarted, waits serious conditions, it is therefore desirable to which secondary power supply is during power failure
Maintain output.
Currently, for the surge on 28V direct current supply line, most avionic devices can be added in secondary power supply input terminal
Surge suppression modules maintain it between 20V~24V output voltage when under-voltage surge occurs, in normal voltage range
It is interior straight-through, and output voltage is maintained into 36V or so when overvoltage surge occurs, occur that the DC/DC module of rear class in surge
When work normally.And it is directed to power-fail interrupt, the electricity of large capacity can be added in usual avionic device on secondary power supply median generatrix
Hold, it is expensive that large bulk capacitance is added in the program, and causes great dash current when booting.Also the equipment having is in secondary electricity
Holding circuit is added in source, is increased busbar voltage by booster circuit, gives maintenance capacitor charging, it is open-minded when inputting power down
Discharge switch maintains capacitive energy to discharge to late-class circuit.But the program increases boosting holding circuit, increases system
Cost and unstability.
Summary of the invention
The purpose of the invention of the present invention is to provide a kind of surge suppressors that function is kept with power down, by boat
The boosting of empty electronic equipment DC bus-bar voltage inhibits under-voltage surge and overvoltage surge, and realizes that power down maintains function, protects
Late-class circuit is protected, module reliably working is made.
The goal of the invention of the utility model is achieved through the following technical solutions:
A kind of surge suppressor keeping function with power down, including surge suppression modules, power down maintain charge switch mould
Block and power down maintain discharge switch module.
Surge suppression modules include inductance L1, capacitor C1 and BUCK-BOOST converter U1, one end of inductance L1 with it is defeated
Enter voltage to connect, the end the input VIN phase of the other end of inductance L1 and the anode of capacitor C1 and BUCK-BOOST converter U1
It connects, the negative terminal of capacitor C1 meets AGND line, the output plus terminal VO connection intermediate bus bar of BUCK-BOOST converter U1, BUCK-BOOST
The input of converter U1 and output ground connect AGND line；
Power down maintain charge switch module include metal-oxide-semiconductor Q4, metal-oxide-semiconductor Q5, resistance R7, resistance R8, resistance R9, resistance R10,
Resistance R11, resistance R12, resistance R13, capacitor C2, voltage-stabiliser tube D5, voltage-stabiliser tube D6 and comparator U2-B, BUCK-BOOST converter
Source, one end of resistance R8 and the cathode of voltage-stabiliser tube D5 of the output plus terminal VO connection metal-oxide-semiconductor Q4 of U1, other the one of resistance R8
End is connect with one end of the gate leve of metal-oxide-semiconductor Q4, the anode of voltage-stabiliser tube D5, resistance R9, and the other end of resistance R9 is with metal-oxide-semiconductor Q5's
Drain electrode connects, the output end phase of the gate leve and the cathode of voltage-stabiliser tube D6, one end of resistance R10 and comparator U2-B of metal-oxide-semiconductor Q5
It connects, the other end of resistance R10 connects with accessory power supply VCC, one end phase of the positive input and resistance R11 of comparator U2-B
It connects, the other end of resistance R11 connects reference power source VREF, the reversed import and export end of comparator U2-B and one end phase of resistance R12
It connecing, the other end of resistance R12 connects with one end of resistance R14, resistance R13, and the other end of resistance R13 connects input voltage,
The drain electrode of metal-oxide-semiconductor Q4 connects with one end of resistance R7, and the other end of resistance R7 connects the forward end of capacitor C2, and resistance R14's is another
Outer one end, the negative terminal of capacitor C2, the anode of voltage-stabiliser tube D6, metal-oxide-semiconductor Q5 source level connect AGND line.
Power down maintain discharge switch module include metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, resistance R1, resistance R2, resistance R3,
Resistance R4, resistance R5, resistance R6, diode D1, voltage-stabiliser tube D2, voltage-stabiliser tube D3, diode D4 and comparator U2-A, diode
The anode of D4 is connect with the anode of capacitor C2, the cathode of diode D4 and one end of resistance R6, the cathode and metal-oxide-semiconductor of voltage-stabiliser tube D3
The source of Q2 connects, and the other end of resistance R6 connects with the anode of voltage-stabiliser tube D3, the gate pole of metal-oxide-semiconductor Q2 and one end of resistance R5
Connect, the other end of resistance R5 connects the drain electrode of metal-oxide-semiconductor Q3, and the gate pole of metal-oxide-semiconductor Q3 connects the cathode and metal-oxide-semiconductor Q1 of voltage-stabiliser tube D2
Drain electrode, the anode of diode D1 is connected with input voltage, and one end of the cathode connecting resistance R2 of diode D1, resistance R2 is in addition
The reverse input end of one termination comparator U2-A and one end of resistance R3, the positive input connecting resistance R1's of comparator U2-A
One end, the other end of resistance R1 meet reference voltage VREF, and the power supply of comparator U2-A terminates accessory power supply VCC, comparator U2-
One end of the output terminating resistor R4 of A, the other end of resistance R4 connect the gate pole of metal-oxide-semiconductor Q1, and the drain electrode of metal-oxide-semiconductor Q2 meets BUCK-
The input positive terminal of BOOST converter U1, the other end of resistance R3, the ground wire of comparator U2-A, the source electrode of metal-oxide-semiconductor Q1, pressure stabilizing
The anode of pipe D2, the source electrode of metal-oxide-semiconductor Q3 connect AGND line.
The utility model maintains to charge by surge suppression modules lifting bus voltage, anti surge voltage by power down
Switch module and power down maintain discharge switch module to realize the charge and discharge to capacitor C2, realize airborne equipment to surge and in
Disconnected maintenance reduces the complexity and cost of design, increases the reliability of system.
In the power supply of Avionic Products, with the present invention, product can be made to meet national military standard GJB181 and RTCA
Power supply characteristic to related specification requirements such as surge voltage and power-fail interrupts in DO-160.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the surge suppressor of function is kept with power down.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.
A kind of surge suppressor keeping function with power down shown in the present embodiment, mainly by resistance, capacitor, two poles
Pipe, metal-oxide-semiconductor and two chip compositions.One of chip is BUCK-BOOST converter U1, has wider input range,
Input voltage is transformed into intermediate-bus voltage, which is higher than 28V.Another chip is by two comparator U2-
A, U2-B is formed.Capacitor C2 is that power down maintains capacitor.The surge suppressor mainly includes three functional modules, surge suppression modules,
Power down maintains charge switch module and power down to maintain discharge switch module.It is shown in Figure 1.
The surge suppression modules include inductance L1, capacitor C1 and BUCK-BOOST converter U1, one end of inductance L1
Connect with input voltage, the input VIN of the other end of inductance L1 and the anode of capacitor C1 and BUCK-BOOST converter U1
End connects, and the negative terminal of capacitor C1 meets AGND line, the output plus terminal VO connection intermediate bus bar of BUCK-BOOST converter U1, BUCK-
The input of BOOST converter U1 and output ground connect AGND line.Inductance L1 and capacitor C1 composition in surge suppression modules
LC filter, BUCK-BOOST converter U1 output voltage is constant, is higher than 28V.The minimum input electricity of BUCK-BOOST converter
Pressure value is lower than under-voltage surge voltage, and maximum input voltage value is higher than overvoltage surge voltage, therefore when surge occurs, intermediate bus bar
Voltages keep constant.
Power down maintain charge switch module include metal-oxide-semiconductor Q4, metal-oxide-semiconductor Q5, resistance R7, resistance R8, resistance R9, resistance R10,
Resistance R11, resistance R12, resistance R13, capacitor C2, voltage-stabiliser tube D5, voltage-stabiliser tube D6 and comparator U2-B, BUCK-BOOST converter
Source, one end of resistance R8 and the cathode of voltage-stabiliser tube D5 of the output plus terminal VO connection metal-oxide-semiconductor Q4 of U1, other the one of resistance R8
End is connect with one end of the gate leve of metal-oxide-semiconductor Q4, the anode of voltage-stabiliser tube D5, resistance R9, and the other end of resistance R9 is with metal-oxide-semiconductor Q5's
Drain electrode connects, the output end phase of the gate leve and the cathode of voltage-stabiliser tube D6, one end of resistance R10 and comparator U2-B of metal-oxide-semiconductor Q5
It connects, the other end of resistance R10 connects with accessory power supply VCC, one end phase of the positive input and resistance R11 of comparator U2-B
It connecing, the other end of resistance R11 meets reference power source VREF, and the reversed import and export of comparator U2-B connects with one end of resistance R12,
The other end of resistance R12 connects with one end of resistance R14, resistance R13, and the other end of resistance R13 meets input voltage, MOS
The drain electrode of pipe Q4 connects with one end of resistance R7, and the other end of resistance R7 connects the forward end of capacitor C2, and other the one of resistance R14
End, the negative end of capacitor C2, the anode of voltage-stabiliser tube D6, metal-oxide-semiconductor Q5 source level connect AGND line.Power down maintains charge switch module to adopt
Sample surge suppression modules output voltage is divided by resistance R13, R14, and compared with reference voltage VREF, control is played switch and made
The on-off of metal-oxide-semiconductor Q5 realizes the control to the metal-oxide-semiconductor Q4 for playing the role of charge switch.Resistance R7 is charging current current limliting
Resistance.When input voltage is higher than certain value, metal-oxide-semiconductor Q4 is opened, intermediate-bus voltage charges to capacitor C2.
Power down maintain discharge switch module include metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, resistance R1, resistance R2, resistance R3,
Resistance R4, resistance R5, resistance R6, diode D1, voltage-stabiliser tube D2, voltage-stabiliser tube D3, diode D4 and comparator U2-A, diode
The anode of D4 is connect with the anode of capacitor C2, the cathode of diode D4 and one end of resistance R6, the cathode and metal-oxide-semiconductor of voltage-stabiliser tube D3
The source of Q2 connects, the other end and one end phase of the anode of voltage-stabiliser tube D3, the gate pole of metal-oxide-semiconductor Q2 and resistance R5 of resistance R6
It connects, the other end of resistance R5 connects the drain electrode of metal-oxide-semiconductor Q3, and the gate pole of metal-oxide-semiconductor Q3 connects the cathode and metal-oxide-semiconductor Q1 of voltage-stabiliser tube D2
Drain electrode, the anode of diode D1 are connected with input voltage, one end of the cathode connecting resistance R2 of diode D1, and other the one of resistance R2
The reverse input end of termination comparator U2-A and one end of resistance R3, the one of the positive input connecting resistance R1 of comparator U2-A
End, the other end of resistance R1 meet reference voltage VREF, and the power supply of comparator U2-A terminates accessory power supply VCC, comparator U2-A
Output terminating resistor R4 one end, the other end of resistance R4 connects the gate pole of metal-oxide-semiconductor Q1, and the drain electrode of metal-oxide-semiconductor Q2 meets BUCK-
The input positive terminal of BOOST converter U1, the other end of resistance R3, the ground wire of comparator U2-A, the source electrode of metal-oxide-semiconductor Q1, pressure stabilizing
The anode of pipe D2, the source electrode of metal-oxide-semiconductor Q3 connect AGND line.Power down maintains discharge switch module samples surge suppression modules input electricity
Pressure is divided by resistance R2, resistance R3, and compared with reference voltage VREF, control acts as metal-oxide-semiconductor Q1, the metal-oxide-semiconductor Q3 of on-off action
On-off realize the control to the metal-oxide-semiconductor Q2 for playing the role of charge switch.Diode D4 prevents input voltage from filling to capacitor C2
Electricity.When input voltage is lower than certain value, metal-oxide-semiconductor Q4 is opened, capacitor C2 discharges to surge suppression modules input terminal.
Claims (2)
1. a kind of surge suppressor for keeping function with power down, including surge suppression modules and power down maintain charge switch mould
Block, it is characterised in that:
The surge suppression modules include inductance L1, capacitor C1 and BUCK-BOOST converter U1, one end of inductance L1 with it is defeated
Enter voltage to connect, the end the input VIN phase of the other end of inductance L1 and the anode of capacitor C1 and BUCK-BOOST converter U1
It connects, the negative terminal of capacitor C1 meets AGND line, the output plus terminal VO connection intermediate bus bar of BUCK-BOOST converter U1, BUCK-BOOST
The input of converter U1 and output ground connect AGND line；
It includes metal-oxide-semiconductor Q4, metal-oxide-semiconductor Q5, resistance R7, resistance R8, resistance R9, resistance R10, resistance that power down, which maintains charge switch module,
R11, resistance R12, resistance R13, capacitor C2, voltage-stabiliser tube D5, voltage-stabiliser tube D6 and comparator U2-B, BUCK-BOOST converter U1
Source, one end of resistance R8 and the cathode of voltage-stabiliser tube D5 of output plus terminal VO connection metal-oxide-semiconductor Q4, the other end of resistance R8 with
One end connection of the gate leve of metal-oxide-semiconductor Q4, the anode of voltage-stabiliser tube D5, resistance R9, the other end of resistance R9 and the drain electrode of metal-oxide-semiconductor Q5
Connect, the gate leve of metal-oxide-semiconductor Q5 connects with the output end of the cathode of voltage-stabiliser tube D6, one end of resistance R10 and comparator U2-B, electricity
The other end of resistance R10 connects with accessory power supply VCC, and the positive input of comparator U2-B connects with one end of resistance R11, electricity
The other end of resistance R11 meets reference power source VREF, and the reversed import and export of comparator U2-B connects with one end of resistance R12, resistance
The other end of R12 connects with one end of resistance R14, resistance R13, and the other end of resistance R13 meets input voltage, metal-oxide-semiconductor Q4
Drain electrode connect with one end of resistance R7, the other end of resistance R7 connects the forward end of capacitor C2, the other end of resistance R14,
The negative end of capacitor C2, the anode of voltage-stabiliser tube D6, metal-oxide-semiconductor Q5 source level connect AGND line.
2. a kind of surge suppressor for keeping function with power down according to claim 1, it is characterised in that also include to fall
Electricity maintains discharge switch module, and it includes metal-oxide-semiconductor Q1, metal-oxide-semiconductor Q2, metal-oxide-semiconductor Q3, resistance R1, electricity that power down, which maintains discharge switch module,
It hinders R2, resistance R3, resistance R4, resistance R5, resistance R6, diode D1, voltage-stabiliser tube D2, voltage-stabiliser tube D3, diode D4 and compares
The anode of device U2-A, diode D4 are connect with the anode of capacitor C2, the cathode of diode D4 and one end of resistance R6, voltage-stabiliser tube D3
Cathode connect with the source of metal-oxide-semiconductor Q2, the anode of the other end of resistance R6 and voltage-stabiliser tube D3, the gate pole of metal-oxide-semiconductor Q2 and
One end of resistance R5 connects, and the other end of resistance R5 connects the drain electrode of metal-oxide-semiconductor Q3, and the gate pole of metal-oxide-semiconductor Q3 connects the yin of voltage-stabiliser tube D2
The anode of the drain electrode of pole and metal-oxide-semiconductor Q1, diode D1 is connected with input voltage, and the one of the cathode connecting resistance R2 of diode D1
End, the other end of resistance R2 connect the reverse input end of comparator U2-A and one end of resistance R3, the forward direction of comparator U2-A
One end of terminating resistor R1 is inputted, the other end of resistance R1 meets reference voltage VREF, and the power supply of comparator U2-A terminates auxiliary
One end of the output terminating resistor R4 of power supply VCC, comparator U2-A, the other end of resistance R4 meet the gate pole of metal-oxide-semiconductor Q1, MOS
The drain electrode of pipe Q2 connects the input positive terminal of BUCK-BOOST converter U1, the other end of resistance R3, comparator U2-A ground wire,
The source electrode of metal-oxide-semiconductor Q1, the anode of voltage-stabiliser tube D2, metal-oxide-semiconductor Q3 source electrode connect AGND line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821763929.XU CN209217707U (en) | 2018-10-29 | 2018-10-29 | The surge suppressor of function is kept with power down |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821763929.XU CN209217707U (en) | 2018-10-29 | 2018-10-29 | The surge suppressor of function is kept with power down |
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| Publication Number | Publication Date |
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| CN209217707U true CN209217707U (en) | 2019-08-06 |
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| CN201821763929.XU Active CN209217707U (en) | 2018-10-29 | 2018-10-29 | The surge suppressor of function is kept with power down |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112165069A (en) * | 2019-11-29 | 2021-01-01 | 苏州润迈德医疗科技有限公司 | Protection circuit, use method thereof and coronary artery analysis system |
-
2018
- 2018-10-29 CN CN201821763929.XU patent/CN209217707U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN112165069A (en) * | 2019-11-29 | 2021-01-01 | 苏州润迈德医疗科技有限公司 | Protection circuit, use method thereof and coronary artery analysis system |
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