CN106300235B - A kind of power-supply system - Google Patents
A kind of power-supply system Download PDFInfo
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- CN106300235B CN106300235B CN201610880216.0A CN201610880216A CN106300235B CN 106300235 B CN106300235 B CN 106300235B CN 201610880216 A CN201610880216 A CN 201610880216A CN 106300235 B CN106300235 B CN 106300235B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
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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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/14—Arrangements for reducing ripples from dc input or output
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The invention discloses a kind of power-supply systems, including fuse protection circuit, DC/DC power circuits, ON-OFF control circuit and surge restraint circuit；The anode of input power connects the input positive terminal of DC/DC power circuits by fuse protection circuit；The cathode of input power connects the input negative terminal of DC/DC power circuits by ON-OFF control circuit and surge restraint circuit；The voltage of input power is converted to the operating voltage that load needs by DC/DC power circuits；When load short circuits or generation latch, fuse protection circuit disconnects the access between the anode and the input positive terminal of DC/DC power circuits of input power；ON-OFF control circuit by control the actuation of relay contact, disconnect the conducting for completing switch tube, cut-off controls, realize to the powering on of load single machine, power off control；The surge that surge restraint circuit instantaneously increased dramatically booting moment supply current generation inhibits.This power-supply system is designed with multiple-protection, is had high reliability, is enhanced survival ability of the load single machine under complex space environment.
Description
Technical field
The present invention relates to power management Design technical fields, and in particular to a kind of power-supply system for for the power supply of space flight load.
Background technology
Due to the exclusive space environment of satellite platform so that spaceborne electric load system is received in the generaI investigation of electric wave frequency spectrum, information
Collection field has unique, irreplaceable status.
Space flight load in orbit during, due to hardware break down with unrepairable characteristic, space flight load
Reliability design is always primary considerations when all space products carry out product design.Power-supply system be electronic equipment just
The basis often to work, space flight load power-supply system will have a direct impact the in-orbit task of satellite once breaking down, such as：
The power system failure of load single machine will result directly in the single machine cisco unity malfunction；The power-supply system of one load single machine goes out
Existing failure may lead to satellite platform power subsystem failure if fault pervasion, will result directly in the in-orbit task of whole star and lose
It loses.
Invention content
The present invention provides a kind of power-supply systems, have the characteristic of multiple-protection, to meet satellite platform to power-supply system
High reliability request.
Power-supply system provided by the invention includes：Fuse protection circuit, DC/DC power circuits, ON-OFF control circuit and wave
Gush suppression circuit；
The anode of input power connects the input positive terminal of the DC/DC power circuits by the fuse protection circuit；It is described
The cathode of input power passes sequentially through the surge restraint circuit and the ON-OFF control circuit connects the DC/DC power circuits
Input negative terminal；
The DC/DC power circuits, for the voltage of input power to be converted to the operating voltage that load needs；
The fuse protection circuit, for when load short circuits or occur latch when, disconnect the input power anode with
Access between the input positive terminal of the DC/DC power circuits；
The ON-OFF control circuit includes the first driver, the second driver, relay；When first driver receives
When booting powers on control instruction, controls the relay and connect the cathode of the input power and the DC/DC power circuits
Access between input negative terminal makes the power-supply system be switched on；When second driver receives shutdown power-off control instruction,
It controls the relay and disconnects access between the cathode of the input power and the input negative terminal of the DC/DC power circuits,
The power-supply system is set to close；
The surge restraint circuit includes first switch pipe and second switch pipe, the first switch pipe and second switch pipe
Control terminate the output end of the ON-OFF control circuit, input terminates the cathode of the input power, and output terminates the DC/
The input negative terminal of DC power supply circuit, for inhibiting the power-supply system booting moment supply current instantaneously to increased dramatically the wave of generation
It gushes.
The beneficial effects of the invention are as follows：The suction that power-supply system provided in an embodiment of the present invention passes through control relay contact
It closes, disconnect the conducting for completing switch tube, cut-off control, realize to the powering on of load single machine, power off control；Fuse protection circuit
The connection of the anode and power-supply system of input power can be disconnected, effectively to load single machine in load short circuits or generation latch
The short trouble of appearance carries out effective protection；Surge restraint circuit can inhibit power-supply system booting moment supply current instantaneously anxious
Increase severely the surge generated greatly, prevents from damaging satellite power supply busbar；Power-supply system provided in an embodiment of the present invention has more
Weight protection Design, can meet requirement of the satellite platform to power-supply system high reliability, enhance load single machine in complex space
Survival ability under environment.
Description of the drawings
Fig. 1 is a kind of functional block diagram of power-supply system provided by one embodiment of the present invention；
Fig. 2 is a kind of functional block diagram for power-supply system that a preferred embodiment of the invention provides；
Fig. 3 is a kind of circuit diagram of power-supply system provided by one embodiment of the present invention.
Specific implementation mode
The present invention design concept be：By controlling the actuation of relay contact, disconnecting and complete to lead VMOS switching tubes
Logical, cut-off control is realized to the powering on of load single machine, powers off control.The high reliability of power-supply system is wanted for satellite platform
It asks, multiple-protection design is carried out to power-supply system：Be connected on input power anode fuse protection circuit can in load short circuits or
When latch occurs, the connection of the anode and power-supply system of input power, the short circuit being likely to occur for load circuit, latch are disconnected
Etc. electric current caused by failures acutely increase situation and carry out effective protection；Surge restraint circuit can inhibit power-supply system booting moment
So that supply current is instantaneously increased dramatically the surge of generation due to the charge effects of capacitive load, prevents from making satellite power supply busbar
At damage；In shutdown moment, the inhibition to backward voltage is realized by the anti-device that disappears, realizes the protection to peripheral active device；EMI
Filter circuit inhibits the ripple that is loaded on power rail voltage, crosstalk, and output filter circuit filters out the work electricity of output
Crosstalk signal between the DC/DC switching frequencies that are loaded in pressure, load eliminates power supply ripple, the shadow that crosstalk works normally equipment
It rings, to enhance survival ability of the space flight load under complicated space environment, enhances reliability, the safety of power-supply system
Property.
Embodiment one
Fig. 1 is a kind of functional block diagram of power-supply system provided by one embodiment of the present invention, as shown in Figure 1, the present embodiment
It provides for including fuse protection circuit 110, DC/DC power circuits 120, switch control for the power-supply system of space flight load power supply
Circuit 130 and surge restraint circuit 140.
The anode of input power connects the input positive terminal of DC/DC power circuits 120 by fuse protection circuit 110；Input electricity
The cathode in source connects the input negative terminal of DC/DC power circuits 120 by ON-OFF control circuit 130 and surge restraint circuit 140.DC/
The voltage of input power is converted to the operating voltage that load needs by DC power supply circuit 120.
When load short circuits or generation latch, fuse protection circuit 110 disconnects the anode and DC/DC power supply electricity of input power
Access between the input positive terminal on road 120 provides the real-time guard to satellite platform power source bus.
ON-OFF control circuit 130 is powered on for the booting of load, power-off of shutting down controls, including the first driver, the second drive
Dynamic device, relay.When the first driver, which receives booting, powers on control instruction, the switch in the first driver control relay is inhaled
It closes, connects the access between the cathode of input power and the input negative terminal of DC/DC power circuits 120, load booting is made to power on.When
When second driver receives shutdown power-off control instruction, the switch in the second driver control relay disconnects, defeated to disconnect
Enter the access between the cathode of power supply and the input negative terminal of DC/DC power circuits 120, makes power-supply system without output.
Surge restraint circuit 140 includes first switch pipe and second switch pipe, the control of first switch pipe and second switch pipe
The output end of system termination ON-OFF control circuit 130, the cathode of input termination input power, output termination DC/DC power circuits 120
Input negative terminal.In device power-up moment, surge restraint circuit 140 can make power supply to the charge effects due to capacitive load
The surge that electric current instantaneously increased dramatically generation is inhibited.Power-supply system provided in this embodiment for for the power supply of space flight load
Electric current acutely increases situation to load noise caused by can effectivelying prevent the failures such as short circuit, the latch that load circuit is likely to occur
Damage may be implemented to provide real-time protection to platform power busbar.This power system design is multiple to adapt to the anti-of space environment
Shield measure enhances survival ability of the space flight load under complicated space environment, enhances reliability, the safety of space product
Property.
Embodiment two
Fig. 2 is a kind of functional block diagram for power-supply system that a preferred embodiment of the invention provides, as shown in Fig. 2, with upper
It states embodiment one to compare, the power-supply system that this preferred embodiment provides further includes EMI filter circuit 220 and output filter circuit
260。
The input positive terminal of EMI filter circuit 260 connects the output end of fuse protection circuit 210, and input negative terminal is pressed down by surge
The cathode of 230 input power of circuit 240 and ON-OFF control circuit processed, output plus terminal are connecing the input of DC/DC power circuits 250 just
End, output negative terminal connect the input negative terminal of DC/DC power circuits 250.EMI filter circuit 260 can be to adding on power rail voltage
The ripple of load, crosstalk are inhibited, and reduce power supply ripple, the influence that crosstalk works normally equipment.
The output end of the input termination DC/DC power circuits 250 of output filter circuit 260, output filter circuit 260 it is defeated
Go out terminating load.Output filter circuit 260 can filter out the DC/DC switch frequencies loaded on 250 output voltage of DC/DC power circuits
Crosstalk between rate and load.
Embodiment three
Fig. 3 is a kind of circuit diagram of power-supply system provided by one embodiment of the present invention, as shown in figure 3, in the present embodiment,
Fuse protection circuit includes fuse F1, F2 and resistance R1.Fuse F2 is connected on the anode and EMI filtered electricals of input power
Between the input positive terminal on road, the both ends of fuse F2 are separately connected one end of fuse F1 and current-limiting resistance R1, fuse F1 with
The other end of current-limiting resistance R1 connects.When space flight load powers up work, the input supply voltage of 28V is loaded into fuse protection circuit
Input terminal, the short circuit being likely to occur to load single machine, latch etc. lead to the failure that electric current increased dramatically, and provides necessary anti-
Shield.Fuse F1 concatenation current-limiting resistance R1 and fuse F2 composition redundant circuit designs, realize the protection to platform power busbar.
Fuse F1, F2 are that, such as RFG series, can be determined according to the real work electric current of space flight load with model device.Fuse F1,
The blowout current of F2 must meet：2Iint<I<Iint+7, i.e. blowout current must be more than 2 times of load rated current, be less than load
Rated current adds 7A.The resistance value of current-limiting resistance R1 can be determined according to the internal resistance of fuse F1, it is preferable that the resistance value ratio of the two is
18：1, i.e., when load single machine works normally, 95% operating current flows through fuse F2.Current-limiting resistance R1 can be RX21 series
Precision resistance, such as carbon film coiling precision resistance.
In the present embodiment, EMI filter circuit includes electromagnetic interface filter Z1.Electromagnetic interface filter Z1 be connected on fuse protection circuit and
Between DC/DC power circuits, the output end of the input positive terminal connection fuse protection circuit of electromagnetic interface filter Z1, input negative terminal passes through
Surge restraint circuit and ON-OFF control circuit connect the cathode of input power, and output plus terminal is connecting the input of DC/DC power circuits just
End, the input negative terminal of output negative terminal connection DC/DC power circuits.The input power of 28V is sent to EMI filters by fuse protection circuit
Wave circuit, electromagnetic interface filter Z1 complete to inhibit the ripple that loads on input power, crosstalk, eliminate power supply ripple, crosstalk pair
The influence of equipment normal work.Selecting for electromagnetic interface filter Z1 can be selected according to real work voltage, the operating current of space flight load
It takes.To meet the requirement of space flight load design of Reducing Rating, the rated current of electromagnetic interface filter Z1 should be 2 times of load single machine rated current
Left and right.Inter point series or VPT series can be selected in the model of electromagnetic interface filter Z1.
In the present embodiment, DC/DC power circuits include DC/DC converters E1, E2.DC/DC conversion modules E1 is connected on EMI
Between the output end and output filter circuit of filter circuit, the input positive terminal of DC/DC converters E1 is connecing the output of electromagnetic interface filter just
End, the input negative terminal of DC/DC converters E1 connect the output negative terminal of electromagnetic interface filter.The output plus terminal of DC/DC converters E1 connects output
The first input end of filter circuit, the output negative terminal of DC/DC converters E1 connect the second input terminal of output filter circuit.DC/DC
The input power of 28V is converted to+5V, the ﹣ 5V voltages that equipment normal work needs by converter E1.DC/DC converters E2's is defeated
Enter the output plus terminal of positive termination electromagnetic interface filter, the input negative terminal of DC/DC converters E2 meets the output negative terminal of electromagnetic interface filter, DC/
The third input terminal of the voltage output termination output filter circuit of DC converters E2.DC/DC converters E2 is by the input power of 28V
Be converted to+15V the voltages that equipment normal work needs.
To meet the requirement of space flight load design of Reducing Rating, every road output rated current of DC/DC converters E1, E2 should be load
2 times or so of rated current.Inter point series or VPT series can be selected in DC/DC converters E1, E2.
In the present embodiment, output filter circuit includes filter capacitor C1~C24, filter inductance L1~L3.Filter inductance L1
First end connect the first end of filter capacitor C1, C13 and the output plus terminal of DC/DC converters E1 respectively, filter capacitor C1 is logical
Filter capacitor C2 ground connection is crossed, filter capacitor C13 is grounded by filter capacitor C14.The second end of filter inductance L1 connects filtering respectively
After the first end of capacitance C3, C15, to load output+5V voltages, filter capacitor C3 is grounded by filter capacitor C4, filter capacitor
C15 is grounded by filter capacitor C16.
The first end of filter inductance L2 connect respectively filter capacitor C5, C17 first end and DC/DC converters E1 it is defeated
Go out negative terminal, filter capacitor C5 is grounded by filter capacitor C6, and filter capacitor C17 is grounded by filter capacitor C18.Filter inductance L2
Second end difference filter capacitor C7, C19 first end after, to load output -5V voltages, filter capacitor C7 passes through filter capacitor
C8 is grounded, and filter capacitor C19 is grounded by filter capacitor C20.
The first end of filter inductance L3 connect respectively filter capacitor C9, C21 first end and DC/DC converters E2 it is defeated
Outlet, filter capacitor C9 are grounded by filter capacitor C10, and filter capacitor C21 is grounded by filter capacitor C22.Filter inductance L3
Second end connect the first end of filter capacitor C11, C23 respectively after, to load output+15V voltages, filter capacitor C11 passes through filter
Wave capacitance C12 ground connection, filter capacitor C23 are grounded by filter capacitor C24.
Filter inductance is made by oneself using on magnet ring by the way of enameled wire, the coiling of inductance by the size of electric current that flows through and
The operating voltage ripple AF panel of output is required to determine, magnet ring is MXD-2000 series, and enameled wire is QZ-2 series.
Filter capacitor C1~C12 can be according to the size of the operating voltage of output and the suppression to the interference of operating voltage distal end ripple
System requires to determine.The voltage loaded in C1~C12 is no more than the 40% of its pressure voltage.Filter capacitor C1~C12 can be band encapsulation
Capacitance, packing forms be surface mount packages, filter capacitor C1~C12 can be multi-layer ceramics.
Filter capacitor C13~C24 can the size according to the operating voltage of output and the inhibition requirement to the interference of proximal end ripple
It determines.Voltage of the load in C13~C24 is about 40% or so of its pressure voltage.Filter capacitor C13~C24 can be with encapsulation
Capacitance, packing forms are surface mount packages, and filter capacitor C13~C24 can be tantalum capacitance or high molecular polymerization capacitance.
The input voltage of 28V is converted to multiplex operation voltage by DC/DC power circuits and is loaded into output filter circuit,
The filter circuit that filter inductance L1, filter capacitor C1~C4, C13~C16 are formed filters out the DC/DC switching frequencies on+5V voltages
And the crosstalk signal between load.The filter circuit that filter inductance L2, filter capacitor C5~C8, C17~C20 are formed filters out ﹣ 5V electricity
The crosstalk signal between DC/DC switching frequencies and load in pressure.Filter inductance L3, filter capacitor C9~C12, C21~C24 compositions
Filter circuit filter out the crosstalk signal between DC/DC switching frequencies on+15V voltages and load.Transformed+5V, ﹣ 5V ,+
Output, is supplied to the late-class circuit of load single machine to use after 15V voltages are filtered.
In the present embodiment, ON-OFF control circuit includes current-limiting resistance R3, R4, driver D1, D2, and relay J1, disappear anti-electricity
Resistance R5~R8 and anti-diode V1~the V4 that disappears.The first end of current-limiting resistance R3 powers on instruction for receiving booting, and the second termination is driven
The control signal of dynamic device D1.Driver D1 uses 4 Darlington transistor working methods that series and parallel connects two-by-two, driver D1's
Control output end connects the control terminal of relay J1 excitation coils 1, and the other end of relay J1 excitation coils 1 connects fuse protection
The output end of circuit.Relay J1 uses 4 contact switch working methods that series and parallel connects two-by-two, relay J1 switch ends
It is connect respectively with the both ends of excitation coil 1.The one end the reverse resistance that disappears R5 is connect with one end of relay J1 excitation coils 1, and disappear anti-electricity
The resistance R5 other ends are connect with the negative terminal for the anti-diode V1 that disappears, the control output of the anode connection driver D1 for the anti-diode V1 that disappears
End, the one end the reverse resistance that disappears R6 are connect with the one end reverse resistance R5 that disappears, and the negative terminal of the reverse resistance that the disappears R6 other ends and the anti-diode V2 that disappears connect
It connects, the control output end of the anode connection driver D1 for the anti-diode V2 that disappears.
One end of current-limiting resistance R4 receives shutdown cut-offing instruction, and the other end connects the control signal of driver D2, driving
Device D2 uses 4 Darlington transistor working methods that series and parallel connects two-by-two, the control output end connection relay J1 of driver D2 to swash
The control terminal of coil 2 is encouraged, the other end of relay J1 excitation coils 2 is connect with one end of relay J1 excitation coils 1, and disappear anti-electricity
Resistance one end R7 is connect with one end of relay J1 excitation coils 2, and the negative terminal of the reverse resistance that the disappears R7 other ends and the anti-diode V3 that disappears connect
It connects, the control output end of the anode connection driver D2 for the anti-diode V3 that disappears, the one end the reverse resistance that disappears R8 and the one end reverse resistance R7 that disappears
Connection, the reverse resistance that the disappears R8 other ends are connect with the negative terminal for the anti-diode V4 that disappears, the anode connection driver D2 for the anti-diode V4 that disappears
Control output end.
Current-limiting resistance R3, R4 can according to control instruction level and be loaded into driver D1, D2 control terminal voltage determine.Limit
The value of leakage resistance R3 should meet：Control instruction is loaded into the control terminal of driver D1 after R3, can ensure that driver D1 works
Make in depth saturation region.The value of current-limiting resistance R4 should meet：Control instruction is loaded into the control terminal of driver D2 after R4,
It can ensure that driver D2 is operated in depth saturation region.Current-limiting resistance R3, R4 can be band package resistance, and packing forms are Surface Mount
Encapsulation.Optionally, R3, R4 value are 100 Ω.
Driver D1, D2 can be attracted according to the contacts relay J1, disconnect required driving current determination.Driver D1,
D2 is that 4 Darlington transistors or 4 transistor switching circuits are constituted by way of going here and there and combining two-by-two.Relay J1 can basis
Relay contact flows through electric current, service life determines.Optionally, relay J1 is that magnetic keeps series.
Reverse resistance R5, R6 that disappears can be powered up according to space flight load, shutdown transient is in relay J1 excitation coils 1, excitation coil 2
The inverse electromotive force size that control terminal generates determines.Reverse resistance R5, R6 that disappears can be band package resistance, and packing forms are Surface Mount
Encapsulation.Optionally, R5, R6 value are 75 Ω
Disappearing anti-diode V1~V4 can be according to the voltage of input power and power-up, shutdown transient in relay J1 excitation coils
The inverse electromotive force size that 1 control terminal generates determines.The anti-diode V1~V4 that disappears can be the diode with encapsulation, packing forms
It is encapsulated for D0-35.Optionally, V1~V4 chooses 2CK series.
ON-OFF control circuit is powered on for the booting of load, power-off of shutting down controls.Booting control level is through current-limiting resistance R3
It is sent to the control terminal of driver D1, driver D1 is conducting to ground, and conducting electric current flows through relay J1 excitation coils 1, and relay is inhaled
It closes, the input power of 28V is loaded into the control terminal of VMOS pipes V5, V6, VMOS pipes V5, V6 conducting, DC/DC power supply electricity through relay
Road output services voltage.Shutdown control level is sent to the control terminal of driver D2 through current-limiting resistance R4, and driver is conducting to ground, leads
Galvanization flows through relay J1 excitation coils 2, and relay disconnects, the control terminal voltage of VMOS pipes V5, V6 be zero, VMOS pipes V5,
V6 ends, DC/DC power circuit Non voltage outputs, the shutdown of load single machine.In shutdown moment, disappear anti-device work, to reversed electricity
Inhibition is applied in compacting, realizes the real-time protection to peripheral active device
In the present embodiment, surge restraint circuit includes divider resistance R9, R11, integrating resistor R10, R12, integrating capacitor
C25, C26, VMOS switching tubes V5, V6.One end contacts connection relay J1 output end of divider resistance R9, other end connection integral
One end of resistance R10, the cathode of the other end connection input power of integrating resistor R10.The both ends of divider resistance R11 respectively with point
The both ends of piezoresistance R9 connect, and the both ends of integrating resistor R12 are connect with the both ends of integrating resistor R10 respectively, integrating capacitor C25's
One end is connect with one end of integrating resistor R12, and the other end is connect with integrating capacitor C26, and the other end connection of integrating capacitor C26 is defeated
Enter the cathode of power supply.
The control terminal of VMOS switching tubes V5 is connect with one end of integrating capacitor C25, and the cathode of input terminal and input power connects
It connects, the input negative terminal connection of output end and EMI filter circuit.The control of the control terminal and VMOS switching tubes V5 of VMOS switching tubes V6
End connection, output end are connect with the output end of VMOS switching tubes V5, and input terminal is connect with the input terminal of VMOS switching tubes V5.
Divider resistance R9, R11 can inhibit to require and load the conducting in VMOS switching tubes V5, V6 according to surge current
Voltage determines.The value of divider resistance R9, R11 should meet：After divider resistance R9, R11 partial pressure load VMOS switching tubes V5,
The voltage of V6 can make switching tube ensure to be connected.Divider resistance R9, R11 can be band package resistance, and packing forms seal for Surface Mount
Dress.Integrating resistor R10, R12 can be true in the conducting voltage of VMOS switching tubes V5, V6 according to requiring Inrush current restraining and loading
It is fixed.The value of integrating resistor R10, R12 should meet：Integrating resistor loads after R10, R12 partial pressure in integrating resistor R10, R12
Voltage can make VMOS switching tubes V5, V6 ensure to be connected.Integrating resistor R10, R12 can be band package resistance, and packing forms are
Surface mount packages.Integrating capacitor C25, C26 can be able to be band envelope according to determination, integrating capacitor C25, C26 is required to Inrush current restraining
The capacitance of dress, packing forms are surface mount packages.
VMOS switching tubes V5, V6 can be determined according to load operation voltage, operating current.To meet design of Reducing Rating requirement,
VMOS switching tube rated current should be 2 times or so of load single machine operating current, load VMOS switching tubes conducting voltage most
60% of its breakdown voltage or so is should be in the case of bad.Optionally, VMOS switching tubes are the series of products of IS companies.
When ON-OFF control circuit control load powers on booting, the voltage in integrating capacitor C25, C26 be zero, VMOS pipes V5,
V6 is in cut-off state, and no electric current flows through VMOS pipes V5, V6.Power supply is subsequently input by divider resistance R9, R11 to integral electricity
Hold C25, C26 to charge, the control terminal voltage of VMOS pipes V5, V6 gradually rise, when reaching VMOS pipe V5, V6 cut-in voltages
Afterwards, VMOS pipes V5, V6 are in magnifying state, and characteristic is equivalent to the variable resistance input power that a resistance value is gradually reduced and passes through
VMOS pipes V5, V6 charges to the capacitance of load single machine load end, thus charging current is inhibited.As VMOS pipes V5, V6
Control terminal voltage reach and make VMOS pipe V5, V6 saturation conductions after, VMOS pipe V5, V6 saturation conductions become a low resistance,
Circuit normality works.When this process is that load single machine powers on booting, surge restraint circuit is to the charging effect due to capacitive load
Answer and the process that is inhibited of the surge current that generates.In booting moment, surge restraint circuit work is implemented to press down to surge current
System realizes the real-time guard to platform power busbar
The above description is merely a specific embodiment, under the above-mentioned introduction of the present invention, those skilled in the art
Other improvement or deformation can be carried out on the basis of the above embodiments.It will be understood by those skilled in the art that above-mentioned tool
Body description only preferably explains that the purpose of the present invention, protection scope of the present invention should be subject to the protection scope in claims.
Claims (10)
1. a kind of power-supply system, for powering for space flight load, which is characterized in that including：Fuse protection circuit, DC/DC power supplys
Circuit, ON-OFF control circuit and surge restraint circuit；
The anode of input power connects the input positive terminal of the DC/DC power circuits by the fuse protection circuit；The input
The input that the cathode of power supply connects the DC/DC power circuits by the surge restraint circuit and the ON-OFF control circuit is negative
End；
The DC/DC power circuits, for the voltage of the input power to be converted to the operating voltage that load needs；
The fuse protection circuit, for when load short circuits or occur latch when, disconnect the input power anode with it is described
Access between the input positive terminal of DC/DC power circuits；
The ON-OFF control circuit includes the first driver, the second driver, relay；When first driver receives booting
When powering on control instruction, the input that the relay connects the cathode and the DC/DC power circuits of the input power is controlled
Access between negative terminal makes the power-supply system be switched on；When second driver receives shutdown power-off control instruction, control
The relay disconnects the access between the cathode of the input power and the input negative terminal of the DC/DC power circuits, makes institute
State power-supply system closing；
The surge restraint circuit includes first switch pipe and second switch pipe, the control of the first switch pipe and second switch pipe
System terminates the output end of the ON-OFF control circuit, and input terminates the cathode of the input power, and output terminates the DC/DC electricity
The input negative terminal of source circuit, for inhibiting the power-supply system booting moment supply current instantaneously to increased dramatically the surge of generation.
2. power-supply system as described in claim 1, which is characterized in that the power-supply system further includes EMI filter circuit and defeated
Go out filter circuit；
The input positive terminal of the EMI filter circuit connects the output end of the fuse protection circuit, and input negative terminal passes through the surge
Suppression circuit and ON-OFF control circuit connect the cathode of the input power, and output plus terminal connects the input of the DC/DC power circuits
Anode, output negative terminal connects the input negative terminal of the DC/DC power circuits, for filtering out the ripple and string that are loaded on input power
It disturbs；
The input of the output filter circuit terminates the output end of the DC/DC power circuits, the output filter circuit it is defeated
Go out terminating load, for filtering out the crosstalk between the DC/DC switching frequencies loaded on input power and load.
3. power-supply system as claimed in claim 2, which is characterized in that the fuse protection circuit includes first fuse,
Two fuses and first resistor；
The first end of the second termination first resistor of the first fuse；
After the first end of the first termination first fuse of the second fuse, as the defeated of the fuse protection circuit
Enter the anode for terminating the input power；After the second end of the second termination first resistor of the second fuse, as
The output of the fuse protection circuit terminates the input positive terminal of the EMI filter circuit.
4. power-supply system as claimed in claim 3, which is characterized in that
The blowout current I of the first fuse and second fuse is more than two times of the rated current Iint of load, is less than negative
The rated current Iint of load adds 7A, i.e. 2Iint<I<Iint+7；
The ratio of the internal resistance of the first fuse and the first resistor is 1:18.
5. power-supply system as claimed in claim 4, which is characterized in that the EMI filter circuit includes electromagnetic interface filter；
The input positive terminal of the electromagnetic interface filter connects the output end of the fuse protection circuit, and input negative terminal is pressed down by the surge
Circuit processed and the ON-OFF control circuit connect the cathode of the input power；
The output plus terminal of the electromagnetic interface filter connects the input positive terminal of the DC/DC power circuits, the output of the electromagnetic interface filter
Negative terminal connects the input negative terminal of the DC/DC power circuits.
6. power-supply system as claimed in claim 5, which is characterized in that the DC/DC power circuits are converted including the first DC/DC
Device, the 2nd DC/DC converters；
The input positive terminal of the first DC/DC converters connects the output plus terminal of the electromagnetic interface filter, the first DC/DC conversions
The input negative terminal of device connects the output negative terminal of the electromagnetic interface filter；
The output plus terminal of the first DC/DC converters connects the first input end of the output filter circuit；
The output negative terminal of the first DC/DC converters connects the second input terminal of the output filter circuit；
The input positive terminal of the 2nd DC/DC converters connects the output plus terminal of the electromagnetic interface filter, the 2nd DC/DC conversions
The input negative terminal of device connects the output negative terminal of the electromagnetic interface filter；
The voltage output of the 2nd DC/DC converters terminates the third input terminal of the output filter circuit.
7. power-supply system as claimed in claim 6, which is characterized in that the output filter circuit includes the first capacitance to second
14 capacitances totally 24 filter capacitors and the first inductance, the second inductance, third inductance；
The first end of first inductance meets first capacitance, the first end of the 13rd capacitance and the first DC/ respectively
The output plus terminal of DC converters；First capacitance passes through the second capacity earth；13rd capacitance passes through the 14th capacitance
Ground connection；
After the second end of first inductance connects the first end of third capacitance, the 15th capacitance respectively, to load output+5V electricity
Pressure；The third capacitance passes through the 4th capacity earth；15th capacitance passes through the 16th capacity earth；
The first end of second inductance meets the 5th capacitance, the first end of the 17th capacitance and the first DC/DC and turns respectively
The output negative terminal of parallel operation；5th capacitance passes through the 6th capacity earth；17th capacitance passes through the 18th capacity earth；
After the second end of second inductance connects the first end of the 7th capacitance, the 19th capacitance respectively, to load output -5V electricity
Pressure；7th capacitance passes through the 8th capacity earth；19th capacitance passes through the 20th capacity earth；
The first end of the third inductance meets the 9th capacitance, the first end of the 21st capacitance and the 2nd DC/DC respectively
The voltage output end of converter；9th capacitance passes through the tenth capacity earth；21st capacitance passes through the 22nd
Capacity earth；
After the second end of the third inductance connects the first end of the 11st capacitance, the 23rd capacitance respectively, to load output+
15V voltages；11st capacitance passes through the 12nd capacity earth；23rd capacitance passes through the 24th capacitance
Ground connection.
8. power-supply system as claimed in claim 7, which is characterized in that the ON-OFF control circuit includes 3rd resistor, the 4th
Resistance, the first driver, the second driver, relay, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, the one or two
Pole pipe, the second diode, third diode, the 4th diode；
The first end of the 3rd resistor powers on instruction for receiving booting, and the second termination described first of the 3rd resistor is driven
The control signal of dynamic device；The control output end of first driver connects the first of the first excitation coil of the relay
End；The output end of the second termination fuse protection circuit of the first excitation coil of the relay；When receiving in booting
When electricity instruction, the control output end of first driver is conducting to ground；
5th resistance, the 6th resistance first end connect respectively the relay the first excitation coil second end, it is described
The cathode of second termination first diode of the 5th resistance, the second termination second diode of the 6th resistance
The anode of cathode, first diode and second diode connects the control output end of first driver respectively；
The first end of 4th resistance is driven for receiving shutdown cut-offing instruction, the second termination described second of the 4th resistance
The control signal of dynamic device；The control output end of second driver connects the first of the second excitation coil of the relay
End；The output end of the second termination fuse protection circuit of the second excitation coil of the relay；It is disconnected when receiving shutdown
When electricity instruction, the control output end of second driver is conducting to ground；
7th resistance, the 8th resistance first end connect respectively the relay the second excitation coil second end, it is described
The cathode of the second termination third diode of the 7th resistance, the second termination the 4th diode of the 8th resistance
The anode of cathode, the third diode and the 4th diode connects the control output end of second driver respectively；
The relay further includes 4 groups of contact switch that series and parallel connects two-by-two, when conducting electric current flows through first excitation coil
When, the contact switch is closed；When conducting electric current flows through second excitation coil, the contact switch disconnects.
9. power-supply system as claimed in claim 8, which is characterized in that first driver includes the first Darlington transistor, the
Two Darlington transistors, third Darlington transistor, the 4th Darlington transistor；Second driver reaches woods including the 5th Darlington transistor, the 6th
Pause pipe, the 7th Darlington transistor, the 8th Darlington transistor；
The emitter of first Darlington transistor connects the collector of second Darlington transistor, the transmitting of second Darlington transistor
Pole is grounded；The emitter of the third Darlington transistor connects the collector of the 4th Darlington transistor, the 4th Darlington transistor
Emitter is grounded；First Darlington transistor, the second Darlington transistor, third Darlington transistor, the base stage of the 4th Darlington transistor are connected
Control signal as first driver；The connected conduct of collector of first Darlington transistor, third Darlington transistor
The control output end of first driver；
The emitter of 5th Darlington transistor connects the collector of the 6th Darlington transistor, the transmitting of the 6th Darlington transistor
Pole is grounded；The emitter of 7th Darlington transistor connects the collector of the 8th Darlington transistor, the 8th Darlington transistor
Emitter is grounded；5th Darlington transistor, the 6th Darlington transistor, the 7th Darlington transistor, the base stage of the 8th Darlington transistor are connected
Control signal as second driver；The connected conduct of collector of 5th Darlington transistor, the 7th Darlington transistor
The control output end of second driver.
10. power-supply system as claimed in claim 9, which is characterized in that the surge restraint circuit includes the 9th resistance, the tenth
Resistance, eleventh resistor, twelfth resistor, the 25th capacitance, the 26th capacitance, first switch pipe, second switch pipe；
The output end of the first end connection relay of 9th resistance, the second termination the tenth resistance of the 9th resistance
First end, the cathode of the second termination input power of the tenth resistance；The both ends of the eleventh resistor connect respectively
Connect the both ends of the 9th resistance；The both ends of the twelfth resistor connect the both ends of the tenth resistance respectively；
The first end of first termination the tenth resistance of the 25th capacitance, the other end pass through the 26th capacitance
Connect the cathode of the input power；
The control of the first switch pipe terminates the first end of the 25th capacitance, and input terminates the negative of the input power
Pole, output terminate the input negative terminal of the EMI filter circuit；
The control of the second switch pipe terminates the control terminal of the first switch pipe, and output terminates the defeated of the first switch pipe
Outlet, input terminate the input terminal of the first switch pipe.
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111416331B (en) * | 2020-03-26 | 2022-06-03 | 上海空间电源研究所 | Pre-charging circuit for suppressing surge current of direct-current power supply |
| CN112003263A (en) * | 2020-09-16 | 2020-11-27 | 上海航天控制技术研究所 | Redundant secondary power supply circuit for combination of satellite-borne fiber-optic gyroscope |
| CN112310950A (en) * | 2020-10-21 | 2021-02-02 | 中国科学院长春光学精密机械与物理研究所 | Surge suppression circuit and aerospace equipment |
| CN112821734A (en) * | 2021-01-29 | 2021-05-18 | 浙江嘉科电子有限公司 | Intelligent power supply conversion control system |
| CN113037082A (en) * | 2021-03-10 | 2021-06-25 | 上海航天测控通信研究所 | Satellite-borne current sampling control power supply device |
| CN114123466B (en) * | 2021-11-22 | 2023-09-26 | 北京计算机技术及应用研究所 | Dual-path redundant power supply self-cutting and recovering method |
| CN114551156B (en) * | 2022-02-28 | 2023-08-29 | 西安思丹德信息技术有限公司 | Relay contact protection circuit for controlling capacitive load |
| CN116760157B (en) * | 2023-08-23 | 2023-11-03 | 长沙普洛电气设备有限公司 | Time-delay power-off circuit and special electric chassis vehicle |
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| JP5188939B2 (en) * | 2008-11-20 | 2013-04-24 | 株式会社ダイヘン | Power conversion apparatus and control method thereof |
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