CN107171304B - A kind of controllable space computer instruction power current-limiting protection circuit - Google Patents
A kind of controllable space computer instruction power current-limiting protection circuit Download PDFInfo
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- CN107171304B CN107171304B CN201710428167.1A CN201710428167A CN107171304B CN 107171304 B CN107171304 B CN 107171304B CN 201710428167 A CN201710428167 A CN 201710428167A CN 107171304 B CN107171304 B CN 107171304B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
- H02H9/02—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess current
- H02H9/025—Current limitation using field effect transistors
Abstract
A kind of controllable space computer instruction power current-limiting protection circuit, the cut-in voltage of instruction power electronic switch is adjusted in starting output current regulating circuit when passing through overcurrent, to realize to space computer instruction power overcurrent protection function.When instruction load breaks down or is short-circuit, instruction power can be exported current limit in safe range.By adjusting current sampling circuit, over-current protection point can be configured, adapt to different spaces computer load and need.After the elimination of overcurrent factor, collection voltages become smaller on current sampling circuit, make instruction power electronic switch independently restore normally to open shutdown, do not influence the function and performance of space computer.So that it is guaranteed that not burning driving circuit in the case of spacecraft instruction load short circuits；It can allow and instruct power supply sending synchronous with command signal, avoid instruction power power-up for a long time, prevent from missing instruction sending under idle state, guarantee that spacecraft instructs link safety of powering.
Description
Technical field
The present invention relates to spacecraft instruction power current-limiting protection circuit, specially a kind of controllable space is calculated
Machine instruction power current-limiting protection circuit.
Background technique
Spacecraft instruction power generallys use+30V power supply at present, after instruction power enters space computer, each
The front end of a load carries out current limliting by resistance, and instruction power chain road is+30V voltage for a long time.Usual spacecraft
Instruction power power supply capacity is stronger, and output current capacity is resistant to current capacity much larger than instruction load driving circuits.It is loading
Occur under short circuit or abnormal conditions, it is possible to instruction driving circuit breakdown be burnt, cause instruction power defeated in a failure mode
High current out drags down instruction power voltage, causes the entire equal cisco unity malfunction of spacecraft all instructions, and directly harm is empty
Between aircraft safety.And load power-up is given under instruction power idle state for a long time, is had probably due to other reasons cause
Accidentally instruction issues.It is to be directed to power supply buses current foldback circuit in invention disclosed patent (application number: US5672918A),
Enabling DCDC module by logical signal forbids end mode to protect.The protected mode directly shutdown power supply in the case where crossing stream mode is defeated
Out, make equipment cisco unity malfunction.
Summary of the invention
Aiming at the problems existing in the prior art, the present invention provides a kind of controllable space computer instruction power limit
Stream protection circuit, structure is simple, and design rationally, can realize overcurrent protection function to space computer instruction power, safely may be used
It leans on, stability is high.
The present invention is to be achieved through the following technical solutions:
A kind of controllable space computer instruction power current-limiting protection circuit, including export current regulating circuit, refer to
Over-current signal sample circuit, instruction power is enabled to enable control circuit, instruction over-current signal output circuit and central processing unit, and
Sequentially connected current sampling circuit, instruction power electronic switch and instruction power output circuit；Instruction power output circuit is given
Instruction driving circuit power supply；
The input terminal of the current sampling circuit and output current regulating circuit is separately connected the instruction electricity of space computer
Source input；The voltage output end of current sampling circuit is connect with the control terminal of output current regulating circuit, current sampling circuit
Output end also successively connects the acquisition of central processing unit through instruction over-current signal sample circuit with instruction over-current signal output circuit
End；
Instruction power enable signal link order power supply of the output end of the central processing unit through issuing makes to can control electricity
The driving end on road, instruction power enable the control terminal of the output end link order power electronic switch of control circuit.
The voltage controling end of the output end link order power electronic switch of the output current regulating circuit；When not occurring
When instruction current power supply overcurrent, output current regulating circuit shutdown；When instruction power overcurrent occurs, the instruction of space computer
Mains input current is converted into voltage value, control output current regulating circuit through current sampling circuit, by current sampling circuit
Cut-in voltage according to the size of electric current from main regulation instruction power electronic switch.
Preferably, the current sampling circuit includes diode V3 and resistance R1；The one end resistance R1 is separately connected two
The end S of PMOS tube V2 in the anode and power electronic switch of pole pipe V3；The instruction of the other end access space computer of resistance R1
Power input.
Preferably, the output current regulating circuit includes triode V5 and resistance R8；The emitter of triode V5 connects
Enter the instruction power input of space computer, base stage connects one end of resistance R8, G of the collector through resistance R7 connection PMOS tube V2
End；The cathode of the other end connection diode V3 of R8, and be grounded through resistance R13.
Preferably, the instruction over-current signal sample circuit includes resistance R3, triode V4, diode V6 and diode
V7；The end S of one end connection PMOS tube V2 of resistance R3, the other end is separately connected the base stage of triode V4 and successively negative sense connects
The diode V6 and diode V7 connect；The collector of the positive connecting triode V5 of diode V7；The emitter of triode V4 connects
The end S of PMOS tube V2, collector link order over-current signal output circuit input terminal.
Preferably, instruction over-current signal output circuit includes resistance R11, resistance R12, resistance R15 and resistance R17, and
Capacitor C2, triode V9 and phase inverter；The input terminal of one end link order over-current signal output circuit of resistance R11, the other end
It is grounded after being separately connected one end of resistance R15 and resistance R17 through connecting；The other end of resistance R15 is separately connected triode V9
Base stage and be grounded after capacitor C2；The emitter of triode V9 is grounded, and base stage is separately connected the input terminal and resistance of phase inverter
The other end of one end of R12, resistance R12 connects power supply VCC；The collection terminal of the output end connection central processing unit of phase inverter.
Preferably, the instruction power output circuit includes the positive D for being connected to PMOS tube V2 in power electronic switch
Diode V1 is held, and is connected to the capacitor C1 and resistance R6 of diode V1 anode and cathode, capacitor C1 and resistance R6
The other end is grounded；Capacitor C1 is parallel with resistance R4.
Preferably, it includes resistance R10, resistance R14 and resistance R16, Yi Jisan that the instruction power, which enables control circuit,
Pole pipe V8；G end of the one end of resistance R10 through resistance R7 connection PMOS tube V2, the collector of other end connecting triode V8；Resistance
One end link order power supply enable signal of R14, the base stage of other end connecting triode V8；One end link order of resistance R16
Power supply enable signal, the emitter of other end connecting triode V8 and ground connection.
Preferably, instruction power enable signal is sent simultaneously in central processing unit, start the output of scan instruction over-current signal
The pulse change of circuit；
If there is impulse level changes, then show that no overcurrent occurs；
Such as no pulse variation, only constant low level signal, then show that instruction power has overcurrent；Central processing unit meeting
Overcurrent number is recorded, and positions the instruction path that over current fault occurs by central processing unit.
Compared with prior art, the invention has the following beneficial technical effects:
Starting output current regulating circuit carries out the cut-in voltage of instruction power electronic switch when the present invention passes through overcurrent
It adjusts, to realize to space computer instruction power overcurrent protection function.When instruction load breaks down or is short-circuit, energy
It is enough that instruction power is exported into current limit in safe range, it not only can guarantee that instruction power normally exports, but also do not burn instruction electricity
The relevant device of source link.Since being switched on and off for instruction power is controlled by central processing unit, refer to when being issued without instruction
Power supply Non voltage output is enabled, guarantees that errorless instruction issues when idle state.By adjusting current sampling circuit, overcurrent can be protected
Shield point is configured, and is adapted to different spaces computer load and is needed.After the elimination of overcurrent factor, electricity is acquired on current sampling circuit
Buckling is small, makes instruction power electronic switch independently restore normally to open shutdown, does not influence the function and performance of space computer.
So that it is of the invention, driving circuit can not be burnt when ensuring that spacecraft instructs load short circuits；It can be negative
It will not be dragged down when carrying short circuit, turn off the power supply of spacecraft instruction power, influence the instruction secure of entire aircraft；It can be negative
Independently restore normal power supply after carrying trouble shooting；It can allow instruction power supply is synchronous with command signal to issue, avoid instruction power long
Time power-up prevents accidentally instruction sending under idle state, guarantees spacecraft instruction power supply link safety.
Detailed description of the invention
Fig. 1 is the structural principle block diagram of current-limiting protection circuit described in present example.
Fig. 2 is the structural principle circuit diagram of current-limiting protection circuit described in present example.
In figure, instruction power input 1, current sampling circuit 2, instruction power electronic switch 3, instruction power output circuit 4,
Output current regulating circuit 5, instruction over-current signal sample circuit 6, instruction power enable signal 7, instruction power make to can control electricity
Road 8, instruction over-current signal output circuit 9, central processing unit 10.
Specific embodiment
Below with reference to specific embodiment, the present invention is described in further detail, it is described be explanation of the invention and
It is not to limit.
As shown in Figure 1, sending instruction to instruction driving circuit 11 in central processing unit 10 issues order simultaneously, instruction is issued
Power supply enable signal 7,7 driving instruction power supply of power supply enable signal enable control circuit 8, and open instructions power electronic switch 3 makes
Instruction power output circuit 4 is powered to instruction driving circuit 11.
Instruction power enable signal 7 is sent simultaneously in central processing unit 10, starts scan instruction over-current signal output circuit 9
Pulse change.Such as no pulse variation, only constant low level signal, then show that instruction power has overcurrent.If there is arteries and veins
Level change is rushed, then shows that no overcurrent occurs.Central processing unit 10 will record overcurrent number, and fixed by central processing unit 10
The instruction path of over current fault occurs for position.
When instruction power overcurrent occurs, the instruction power input 1 of space computer flows through current sampling circuit 2, passes through
Current sampling circuit 2 is converted into voltage value, control output current regulating circuit 5.It is instructed according to the size of electric current from main regulation
The cut-in voltage of power electronic switch 3.Electric current i passes through resistance R1, and the voltage value at resistance both ends is i*R1,1N5819 diode pressure
It is reduced to 0.3V.When i*R1+0.3V is less than 0.7V, triode V5 is not turned on, the U of electronic switch V2GSVoltage is -10V, electronic cutting
Closing output electric current is i.When i*R1+0.3V is greater than 0.7V, as i increases, resistance R8 electric current Ib increase, triode V5 work are flowed through
Make state gradually to shift to saturation region, the Uce pressure drop of triode V5 reduces.As Uce voltage reduces, the U of electronic switch 2GSElectricity
Pressure value reduces, and using electronic switch cut-in voltage and output electric current linear relationship, cut-in voltage is lower, and output current capacity is got over
It is small, work as UGSWhen voltage value is lower than cut-in voltage 2V, the electric current output of electronic switch V2 is thoroughly turned off.It is adopted by regulating allocation electric current
2 resistance value size of sample circuit makes the electric current when short trouble occurs through instruction power electronic switch 3 not burn next stage and refers to
Enable driving circuit 11.If collection voltages become smaller on current sampling circuit 2, make instruction power electronic cutting after overcurrent factor is eliminated
The normal unlatching shutdown of autonomous recovery is closed, does not influence the function and performance of space computer.
The embodiment of the invention provides for the controllable adjustable self- recoverage of certain model satellite platform product computer one kind
Instruction power current-limiting protection circuit with tally function.The circuit is embedded in the platform computer instruction sending module.Circuit
Principle is as shown in Fig. 2, the circuit includes instruction power input 1, current sampling circuit 2, instruction power electronic switch 3, instruction electricity
Source follower circuit 4, output current regulating circuit 5, instruction over-current signal sample circuit 6, instruction power enable signal 7, instruction electricity
Source enables control circuit 8, instruction over-current signal output circuit 9 and central processing unit 10.
Wherein, the current sampling circuit 2 includes diode V3 and resistance R1；The one end resistance R1 is separately connected two
The end S of PMOS tube V2 in the anode and power electronic switch 3 of pole pipe V3；The instruction of the other end access space computer of resistance R1
Power input 1.
The output current regulating circuit 5 includes triode V5 and resistance R8；The emitter of triode V5 accesses space
The instruction power input 1 of computer, base stage connects one end of resistance R8, G end of the collector through resistance R7 connection PMOS tube V2；R8
Other end connection diode V3 cathode, and be grounded through resistance R13.Instruct over-current signal sample circuit 6 include resistance R3, three
Pole pipe V4, diode V6 and diode V7；The end S of one end connection PMOS tube V2 of resistance R3, the other end are separately connected triode
The base stage of V4 and successively the diode V6 and diode V7 of negative sense connection；The collection of the positive connecting triode V5 of diode V7
Electrode；The end S of the emitter connection PMOS tube V2 of triode V4,9 input terminal of collector link order over-current signal output circuit.
Instruct over-current signal output circuit 9 include resistance R11, resistance R12, resistance R15 and resistance R17 and capacitor C2,
Triode V9 and phase inverter；The input terminal of one end link order over-current signal output circuit 9 of resistance R11, the other end connect respectively
It is grounded after one end of connecting resistance R15 and resistance R17 through connecting；The other end of resistance R15 is separately connected the base stage of triode V9
And it is grounded after capacitor C2；The emitter of triode V9 is grounded, base stage be separately connected phase inverter input terminal and resistance R12 one
The other end at end, resistance R12 connects power supply VCC；The collection terminal of the output end connection central processing unit of phase inverter.
The instruction power output circuit 4 includes two pole of the end D that forward direction is connected to PMOS tube V2 in power electronic switch 3
Pipe V1, and it is connected to the capacitor C1 and resistance R6 of diode V1 anode and cathode, the other end of capacitor C1 and resistance R6
It is grounded；Capacitor C1 is parallel with resistance R4.
It includes resistance R10, resistance R14 and resistance R16 and triode V8 that the instruction power, which enables control circuit 8,；
G end of the one end of resistance R10 through resistance R7 connection PMOS tube V2, the collector of other end connecting triode V8；The one of resistance R14
Hold link order power supply enable signal 7, the base stage of other end connecting triode V8；One end link order power supply of resistance R16 makes
It can signal 7, the emitter of other end connecting triode V8 and ground connection.
In use, space computer instruction power input 1 flows through the resistance in current sampling circuit 2.In central processing unit
10 send designated command simultaneously, issue instruction power enable signal 7, and 7 driving instruction power supply of power supply enable signal makes to can control electricity
Triode V8 is connected in road 8, and the PMOS tube 2N7389 in open instructions power electronic switch 3 makes instruction power output circuit 4
To the load supplying of rear class order-driven.Instruction power enable signal is sent simultaneously in central processing unit 10, starts scan instruction
The pulse change of over-current signal output circuit 9.Such as no pulse variation, only constant level signal, then show that instruction power had
Stream occurs.If there is impulse level changes, then show that no overcurrent occurs.The present invention passes through central processing with overcurrent tally function
Device 10 can position the instruction path that over current fault occurs；Central processing unit 10 will record overcurrent number, and pass through centre
Manage the instruction path that over current fault occurs for the positioning of device 10.When instruction power overcurrent occurs, pass through the electricity in current sampling circuit 2
Resistance converts the current into voltage value, and electric current i passes through resistance R1, and the voltage value at resistance both ends is i*R1,1N5819 diode drop
For 0.3V.When i*R1+0.3V is less than 0.7V, triode V5 is not turned on, the U of electronic switch V2GSVoltage is -10V, electronic switch
Output electric current is i.When i*R1+0.3V is greater than 0.7V, as i increases, resistance R8 electric current Ib increase, triode V5 work are flowed through
State is gradually shifted to saturation region, and the Uce pressure drop of triode V5 reduces.As Uce voltage reduces, the U of electronic switch 2GSVoltage
Value reduces, and using electronic switch cut-in voltage and output electric current linear relationship, cut-in voltage is lower, and output current capacity is smaller,
Work as UGSWhen voltage value is lower than cut-in voltage 2V, the electric current output of electronic switch V2 is thoroughly turned off.Pass through regulating allocation current sample
The resistance value size of resistance R1 in circuit 2 makes to burn when short trouble occurs by the electric current of instruction power electronic switch
Next stage instruction driving circuit.If collection voltages become smaller on current sampling circuit 2, and i*R1+0.3V is small after overcurrent factor is eliminated
In 0.7V, the triode V5 shutdown in current regulating circuit 5 is exported, instruction power electronic switch is made independently to restore normally to open
Shutdown, does not influence the function and performance of space computer.
The specific embodiment that the present invention is lifted is only the annotation to the invention spirit, person skilled in the art of the present invention
It can modify to the specific embodiment of description or similar method substitutes, without departing from spirit of the invention.
Claims (8)
1. a kind of controllable space computer instruction power current-limiting protection circuit, which is characterized in that including exporting electric current tune
It economizes on electricity road (5), instruction over-current signal sample circuit (6), instruction power enables control circuit (8), instruction over-current signal exports electricity
Road (9) and central processing unit (10) and sequentially connected current sampling circuit (2), instruction power electronic switch (3) and instruction
Power output circuit (4)；Instruction power output circuit (4) is powered to instruction driving circuit (11)；
The current sampling circuit (2) and the input terminal for exporting current regulating circuit (5) are separately connected the instruction of space computer
Power input (1)；The voltage output end of current sampling circuit (2) is connect with the control terminal of output current regulating circuit (5), electric current
The output end of sample circuit (2) also successively connects through instruction over-current signal sample circuit (6) and instruction over-current signal output circuit (9)
Connect the collection terminal of central processing unit (10)；
Instruction power enable signal (7) the link order power supply of the output end of the central processing unit (10) through issuing makes can control
The driving end of circuit (8), instruction power enable the control of the output end link order power electronic switch (3) of control circuit (8)
End；
The voltage controling end of the output end link order power electronic switch (3) of output current regulating circuit (5)；When not sending out
When raw instruction current power supply overcurrent, output current regulating circuit (5) shutdown；When instruction power overcurrent occurs, space computer
Instruction power input (1) flow through current sampling circuit (2), voltage value is converted by current sampling circuit (2), control output
Current regulating circuit (5) comes from the cut-in voltage of main regulation instruction power electronic switch (3) according to the size of electric current.
2. the controllable space computer instruction power current-limiting protection circuit of one kind according to claim 1, feature
It is, the current sampling circuit (2) includes diode V3 and resistance R1；The one end resistance R1 is separately connected diode V3
Anode and power electronic switch (3) in PMOS tube V2 the end S；The instruction power of the other end access space computer of resistance R1
It inputs (1).
3. the controllable space computer instruction power current-limiting protection circuit of one kind according to claim 2, feature
It is, the output current regulating circuit (5) includes triode V5 and resistance R8；The emitter access space meter of triode V5
The instruction power of calculation machine inputs (1), and base stage connects one end of resistance R8, G end of the collector through resistance R7 connection PMOS tube V2；R8
Other end connection diode V3 cathode, and be grounded through resistance R13.
4. the controllable space computer instruction power current-limiting protection circuit of one kind according to claim 3, feature
It is, the instruction over-current signal sample circuit (6) includes resistance R3, triode V4, diode V6 and diode V7；Resistance
The end S of one end connection PMOS tube V2 of R3, two poles that the other end is separately connected the base stage of triode V4 and successively negative sense connects
Pipe V6 and diode V7；The collector of the positive connecting triode V5 of diode V7；The emitter of triode V4 connects PMOS tube
The end S of V2, collector link order over-current signal output circuit (9) input terminal.
5. the controllable space computer instruction power current-limiting protection circuit of one kind according to claim 1, feature
Be, instruction over-current signal output circuit (9) include resistance R11, resistance R12, resistance R15 and resistance R17 and capacitor C2,
Triode V9 and phase inverter；The input terminal of one end link order over-current signal output circuit (9) of resistance R11, other end difference
It is grounded after connecting one end of resistance R15 and the resistance R17 through connecting；The other end of resistance R15 is separately connected the base of triode V9
It pole and is grounded after capacitor C2；The emitter of triode V9 is grounded, and base stage is separately connected the input terminal and resistance R12 of phase inverter
The other end of one end, resistance R12 connects power supply VCC；The collection terminal of the output end connection central processing unit of phase inverter.
6. the controllable space computer instruction power current-limiting protection circuit of one kind according to claim 1, feature
It is, the instruction power output circuit (4) includes the end D two that forward direction is connected to PMOS tube V2 in power electronic switch (3)
Pole pipe V1's, and be connected to the capacitor C1 and resistance R6 of diode V1 anode and cathode, capacitor C1 and resistance R6 is another
End is grounded；Capacitor C1 is parallel with resistance R4.
7. the controllable space computer instruction power current-limiting protection circuit of one kind according to claim 1, feature
It is, it includes resistance R10, resistance R14 and resistance R16 and triode V8 that the instruction power, which enables control circuit (8),；
G end of the one end of resistance R10 through resistance R7 connection PMOS tube V2, the collector of other end connecting triode V8；The one of resistance R14
It holds link order power supply enable signal (7), the base stage of other end connecting triode V8；One end link order power supply of resistance R16
Enable signal (7), the emitter of other end connecting triode V8 and ground connection.
8. the controllable space computer instruction power current-limiting protection circuit of one kind according to claim 1, feature
It is, sends instruction power enable signal simultaneously in central processing unit (10), start scan instruction over-current signal output circuit (9)
Pulse change；
If there is impulse level changes, then show that no overcurrent occurs；
Such as no pulse variation, only constant low level signal, then show that instruction power has overcurrent；Central processing unit (10) meeting
Overcurrent number is recorded, and the instruction path of over current fault occurs by central processing unit (10) positioning.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710428167.1A CN107171304B (en) | 2017-06-08 | 2017-06-08 | A kind of controllable space computer instruction power current-limiting protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710428167.1A CN107171304B (en) | 2017-06-08 | 2017-06-08 | A kind of controllable space computer instruction power current-limiting protection circuit |
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| Publication Number | Publication Date |
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| CN107171304A CN107171304A (en) | 2017-09-15 |
| CN107171304B true CN107171304B (en) | 2018-12-25 |
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| CN201710428167.1A Active CN107171304B (en) | 2017-06-08 | 2017-06-08 | A kind of controllable space computer instruction power current-limiting protection circuit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110322675B (en) * | 2019-06-25 | 2020-08-14 | 北京临近空间飞行器系统工程研究所 | Wireless transmission control system |
| CN112213973B (en) * | 2020-09-11 | 2021-10-22 | 北京空间飞行器总体设计部 | Spacecraft orbit control load power consumption autonomous control method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5672918A (en) * | 1994-08-18 | 1997-09-30 | The United States Of America As Represented By The United States Department Of Energy | System level latchup mitigation for single event and transient radiation effects on electronics |
| CN103474951B (en) * | 2013-08-28 | 2016-05-04 | 北京空间飞行器总体设计部 | The controlled low voltage difference current foldback circuit of a kind of output |
| CN206041583U (en) * | 2016-09-22 | 2017-03-22 | 深圳市大疆创新科技有限公司 | Control system and unmanned vehicles of group battery |
| CN106786400B (en) * | 2016-11-11 | 2018-02-16 | 深圳市航天新源科技有限公司 | Overcurrent protection and anti-latch circuit |
| CN106602501B (en) * | 2016-11-11 | 2018-10-30 | 深圳市航天新源科技有限公司 | Current-limiting protection circuit |
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2017
- 2017-06-08 CN CN201710428167.1A patent/CN107171304B/en active Active
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