CN107947773A - The soft start and stop of power supply of Magnetic isolation control semiconductor switch and protective device and electrical system - Google Patents
The soft start and stop of power supply of Magnetic isolation control semiconductor switch and protective device and electrical system Download PDFInfo
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- CN107947773A CN107947773A CN201711226585.9A CN201711226585A CN107947773A CN 107947773 A CN107947773 A CN 107947773A CN 201711226585 A CN201711226585 A CN 201711226585A CN 107947773 A CN107947773 A CN 107947773A
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 63
- 238000002955 isolation Methods 0.000 title claims abstract description 37
- 230000001681 protective effect Effects 0.000 title claims abstract description 23
- 230000001105 regulatory effect Effects 0.000 claims abstract description 12
- 230000001276 controlling effect Effects 0.000 claims abstract description 5
- 238000001514 detection method Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 8
- 238000009825 accumulation Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 description 26
- 230000008569 process Effects 0.000 description 23
- 238000005516 engineering process Methods 0.000 description 11
- 230000007423 decrease Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
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- 238000004146 energy storage Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/13—Modifications for switching at zero crossing
- H03K17/133—Modifications for switching at zero crossing in field-effect transistor switches
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0822—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in field-effect transistor switches
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/16—Modifications for eliminating interference voltages or currents
- H03K17/161—Modifications for eliminating interference voltages or currents in field-effect transistor switches
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Abstract
The soft start and stop of power supply and protective device and electrical system the present invention relates to a kind of Magnetic isolation control semiconductor switch,Belong to spacecraft power supply technical field,The device includes busbar link circuit,Grid controls and driving circuit and signal control signal,Busbar link circuit includes high voltage busbar connecting pin,Power semiconductor switch MOSFET,Load pull down resistor,Load input capacitance,Electrical equipment and bus bar circuit ground connecting pin,Grid controls and driving circuit includes the linear regulated power supply of low-voltage direct,Isolating transformer,Low-voltage high-frequency switching tube,With controlling loop line connecting pin and control signal rectifier bridge,Signal control signal includes DC control signal input terminal,Pulse drive signal input terminal and electrical equipment enable control signal input,The present invention can apply the power semiconductor switch mosfet under the hundreds of volt high potentials of control signal control in " ground potential ",Realize unicom and the disconnection of busbar and electrical equipment,Overvoltage protection can be played the role of at the same time.
Description
Technical field
The present invention relates to spacecraft power supply technical field, relates in particular to a kind of electricity of Magnetic isolation control semiconductor switch
The soft start and stop in source and protective device and electrical system.
Background technology
With the fast development of space technology, the electrical equipment species of spacecraft is more and more, quantity is more and more, power
Increasing, electric power develops into tens of kilowatt from original thousands of watts, and future needs hundreds of kilowatts, the use of even more high
Electrical power, the voltage of power supply buses is higher and higher, largely uses 100V voltage bus now, is promoting 160V voltage bus,
250V and 400V busbares are being researched and developed, according to demand, it is expected that the following busbar needed in development more than 500V even more highs.
In ground system, the connection of electrical equipment and busbar voltage is generally using the side such as insurance, air switch, contactor
Method is realized, optocoupler control semiconductor switch can also be used to realize.But in space power technology, using insurance, air switch
And the methods of contactor, volume and weight is too big, the device also without suitable space flight grade；Due to radial displacements benefit, optocoupler
Degenerate quickly, or even failure, can not directly it be applied under space condition.In existing space power technology, have following existing
There is method to realize that busbar is realized with electrical equipment to connect：
1) directly it is connected using busbar with electrical equipment, middle unprotect measure, advantage is, circuit knot few using device
Structure is simple, it is not necessary to extra controller；Shortcoming is fault-free protection and isolation features, and event occurs in such as any electrical equipment
Barrier, can all cause all electrical equipment failures on the busbar, it is often more important that：During Spacecraft Launch, it is necessary to by
The low pressure stage, as busbar high voltage loading in electrical equipment, low pressure discharge can be caused, cause equipment fault, therefore, should
Technology is difficult to be used in high voltage busbar.
2) relay technology is used, the relay control soft starting circuit identical with ground system, but the system can be used
Volume is big, weight weight, and protection speed is slow, bus-bar system may be caused to break down, the reliability of the technology path is relatively low, it is impossible to
Meet requirement of the spacecraft to power-supply system high reliability.
3) solid state distribution technology is used, solid-state power controller is the core devices of solid state distribution technology, solid-state controller
The break-make for realizing circuit by MOSFET and IGBT controls, and the rated current of the solid-state power controller of 28V is in several peaces to tens
In the range of peace, more powerful distribution can use the contactor of supplementary protection function to realize.In the situation of high-voltage large current
Under, using solid state distribution technology, not only need to provide the accessory power supply of isolation for solid-state power controller, but also need additional protect
The contactor of protective function, circuit is complicated, and volume and weight is larger, and cost is very high.
Most recent two decades, high-power semiconductor switch MOSFET is fast-developing, and MOSFET's has the following advantages that：1) exist
Closed mode, more than tens of megohms of the resistance value of switch mosfet；In conducting state, its resistance value can as low as count milliohm；
2) MOSFET can be made to be operated in linear work area and saturation workspace by varying grid voltage, switch conversion time can be small
In 1 microsecond；3) operating current can reach thousands of volts from number peace to peaces up to a hundred, voltage；4) control mode is very simple, in grid plus
Three ten-day period of hot season voltage, it is possible to realize controller break-make.
According to MOSFET characteristics, the present invention propose a kind of soft start and stop of power supply of Magnetic isolation control power semiconductor switch with
Rapid protecting device and electrical system, to overcome in existing space power technology, the shortcomings that busbar is connected with electrical equipment.
The content of the invention
In order to solve a variety of deficiencies of the prior art, it is proposed that a kind of soft start and stop of power supply of Magnetic isolation control semiconductor switch
With protective device and electrical system, which, in power initiation, realizes prime using Magnetic isolation control power semiconductor switch
High voltage busbar is smoothly connected with electrical equipment；In power-off, realize that prime high voltage busbar is smoothly set with electricity consumption
Back-up from；When over current fault occurs in electrical equipment, prime high voltage busbar and the quick separating of electrical equipment are realized.
To achieve the above object, the present invention provides following technical solution：
A kind of soft start and stop of power supply of Magnetic isolation control semiconductor switch and protective device, including busbar link circuit, grid
Control and driving circuit and signal control signal；
The busbar link circuit includes high voltage busbar connecting pin, power semiconductor switch MOSFET, load drop-down electricity
Resistance, with loading input capacitance, electrical equipment and bus bar circuit connecting pin, the high voltage busbar connecting pin are sequentially connected in series power half
Conductor switch MOSFET, with loading pull down resistor and bus bar circuit connecting pin, the load input capacitance and electrical equipment are in parallel
In the both ends of load pull down resistor；
The grid control and driving circuit include the linear regulated power supply of low-voltage direct, isolating transformer, low-voltage high-frequency and open
Guan Guan, connecting pin and control signal rectifier bridge, the linear regulated power supply of low-voltage direct are sequentially connected in series magnetic with controlling loop line
The primary coil of isolating transformer, low-voltage high-frequency switching tube and control loop line ground connecting pin, the Magnetic isolation transformer secondary output line
The output terminal of circle is connected to control signal rectifier bridge ac input end, and the control signal rectifier bridge DC output end is connected to work(
The grid of rate semiconductor switch MOSFET；
The signal control signal includes DC control signal input terminal, pulse drive signal input terminal and electrical equipment
Enabled control signal input, the DC control signal input terminal connect the linear regulated power supply of low-voltage direct, and the pulse is driven
Dynamic signal input part connection low-voltage high-frequency switching tube, the electrical equipment enable control signal input connection electrical equipment.
Further, grid control resistance and grid are parallel between the grid and source electrode of the power semiconductor switch MOSFET
Pole controls capacitance.
Further, grid antistatic electricity is connected between the control terminal of the low-voltage high-frequency switching tube and control loop line ground
Resistance.
Further, the signal source of the DC control signal input terminal connection linear adjustable, the pulse drive signal
Input terminal connects a high-frequency pulse signal source, and the electrical equipment enables control signal input and connects a level signal
Source.
The present invention also provides a kind of electrical system, including positive voltage busbar, negative voltage busbar loop line and to positive voltage busbar,
The high-voltage battery accumulation power supply of negative voltage busbar loop line power supply, is at least connected with positive voltage busbar and negative voltage busbar loop line
There are the soft start and stop of power supply and the protective device that an above-mentioned Magnetic isolation controls semiconductor switch.
Further, overcurrent detection sensor, over-current signal adjustment circuit and pull-down diode, the overcurrent detection are further included
Sensor is connected with high voltage busbar connecting pin, over-current signal adjustment circuit respectively, and described pull-down diode one end is driven with pulse
Dynamic signal input part connection, the other end are connected with over-current signal adjustment circuit.
Further, two Magnetic isolations are connected with positive voltage busbar and negative voltage busbar loop line and control semiconductor switch
The soft start and stop of power supply and protective device.
The soft start and stop of power supply of the Magnetic isolation control semiconductor switch of the present invention and the protective device course of work include three mistakes
Journey:Soft start-up process, soft stopped process and process is quickly protected, the idiographic flow of three processes is as follows：
Soft start-up process：High voltage busbar connecting pin with busbar loop line connecting pin connect hundreds of volts high voltage it is female
Line, the grid no-voltage of power semiconductor switch MOSFET, is off state, its resistance value reaches more than several megohms, far
Much larger than the resistance value of load pull down resistor, therefore high voltage busbar voltage is landed mainly on power semiconductor switch MOSFET,
The input voltage of electrical equipment is far smaller than its operating voltage；Under conditions of the condition that electrical equipment is completed to be powered prepares,
Pulse drive signal input terminal applies the signal of a fixed frequency, driving low-voltage high-frequency switching tube work, then in direct current control
Control signal input processed applies a level signal, the linear regulated power supply output voltage of low-voltage direct is slowly increased；Magnetic every
The signal output slowly risen from transformer output terminal, the control slowly risen by control signal rectifier bridge output one are believed
Number, which is applied on the grid of power semiconductor switch MOSFET, and the resistance value of power semiconductor switch MOSFET is gradual
Decline, electric current is slowly charged by power semiconductor switch MOSFET to load input capacitance；With power semiconductor switch
The voltage of the grid of MOSFET gradually rises, and power semiconductor switch MOSFET is completely open-minded, its resistance value drops to tens of millis
Ohm, the busbar voltage complete time is in electrical equipment；Finally control signal input is enabled in electrical equipment input a level
Signal, electrical equipment are started to work, and complete soft start-up process.
Soft stopped process：Stop the enable signal that electrical equipment enables control signal input first, electrical equipment stops
Work, then the input signal of stop pulse driving signal input, low-voltage high-frequency switching tube is stopped, in power semiconductor
Control voltage on switch MOSFET grids drops to zero, MOSFET closings, stops, to power supply for electrical equipment, loading in input capacitance
Electric energy discharged by loading pull down resistor, voltage is gradually lowered to zero in electrical equipment, and busbar is separated with electrical equipment, most
Afterwards, the control signal of DC control control signal input is stopped, the soft stop for completing power supply is stopped.
Quick protection process：In the process of running, bus-bar system detects current value and exceedes setting value, produces overcurrent letter
Number, over-current signal blocks the drive signal of pulse drive signal input terminal, low pressure by pulling down the grid of low-voltage high-frequency switching tube
HF switch pipe is stopped immediately, and control signal rectifier bridge stops output, the grid of power semiconductor switch MOSFET and source
Parallel gate control resistance and grid control capacitance electric discharge, grid voltage rapid decrease, power semiconductor switch between pole
The quick cut off circuits of MOSFET, realize the quick protection of system.
The beneficial effects of the invention are as follows：
The soft start and stop of power supply of Magnetic isolation control semiconductor switch provided by the invention and protective device can be in " ground potentials "
Apply the power semiconductor switch mosfet under the hundreds of volt high potentials of control signal control, realize the unicom of busbar and electrical equipment
And disconnection, while fuse, air switch and contactor can be played the role of；Control signal is realized using Magnetic isolation transformer
Transmission, meet requirement of the power-supply system in space environment high reliability.
Brief description of the drawings
Fig. 1 is the soft start and stop of power supply and the protective device circuit diagram of the Magnetic isolation control semiconductor switch of the present invention；
Fig. 2 is the electrical system circuit diagram of the present invention.
In attached drawing：1- high voltage busbares connecting pin, 2- power semiconductor switch MOSFET, 3- grid control resistance, 4- are born
Pull down resistor is carried, 5- load input capacitances, 6- electrical equipments, 7- DC control signal input terminals, 8- low-voltage directs are linearly adjustable
Power supply, 9- Magnetic isolation transformers, 10- control signal rectifier bridges, 11- grids control capacitance, 12- pulse drive signal input terminals,
13- grid Anti-static resistors, 14- low-voltage high-frequency switching tubes, 15- busbar loop lines ground connecting pin, 16- control loop lines, 17- is used
Electric equipment enables control signal input, 18- positive voltage busbares, 19- negative voltage busbar loop lines, 20- high-voltage batteries energy storage electricity
Source, 21- first devices, 22- second devices, 23- overcurrent detection sensors, 24- over-current signal adjustment circuits, 25- pull down two poles
Pipe.
Embodiment
It is right with reference to the attached drawing of the present invention in order to make those skilled in the art more fully understand technical scheme
Technical scheme carries out clear, complete description, and based on the embodiment in the application, those of ordinary skill in the art exist
The other similar embodiments obtained on the premise of not making creative work, should all belong to the scope of the application protection.
Embodiment one：
As shown in Figure 1, the soft start and stop of power supply and the protective device of a kind of Magnetic isolation control semiconductor switch, including busbar connection
Circuit, grid control and driving circuit and signal control signal.
Specifically, the busbar link circuit include high voltage busbar connecting pin 1, power semiconductor switch MOSFET2,
With loading pull down resistor 4, load input capacitance 5, electrical equipment 6 and bus bar circuit connecting pin 15, the high voltage busbar connection
Connecting pin 15, the load are defeated with being sequentially connected in series power semiconductor switch MOSFET2, load pull down resistor 4 and bus bar circuit at end 1
Enter capacitance 5 and electrical equipment 6 be parallel to the both ends of load pull down resistor 4, the grid of the power semiconductor switch MOSFET2 and
Grid control resistance 3 and grid control capacitance 11 are parallel between source electrode.
The grid control and driving circuit include the linear regulated power supply 8 of low-voltage direct, isolating transformer 9, low-voltage high-frequency
Switching tube 14, connecting pin 16 and control signal rectifier bridge 10, the linear regulated power supply 8 of low-voltage direct are gone here and there successively with controlling loop line
With joining the primary coil, low-voltage high-frequency switching tube 14 and control loop line of connection Magnetic isolation transformer 9 connecting pin 16, the Magnetic isolation
The output terminal of 9 secondary coil of transformer is connected to 10 ac input end of control signal rectifier bridge, the control signal rectifier bridge 10
DC output end is connected to the grid of power semiconductor switch MOSFET2, the control terminal of the low-voltage high-frequency switching tube 14 and control
Grid Anti-static resistor 13 is connected between 16 loop line processed.
The signal control signal includes DC control signal input terminal 7, pulse drive signal input terminal 12 and electricity consumption
Equipment enables control signal input 17, and the DC control signal input terminal 7 connects the linear regulated power supply 8 of low-voltage direct, institute
State pulse drive signal input terminal 12 and connect low-voltage high-frequency switching tube 14, the electrical equipment enables control signal input 17 and connects
Electrical equipment 6 is connect, the DC control signal input terminal 7 connects the signal source of linear adjustable, and the pulse drive signal is defeated
Enter the one high-frequency pulse signal source of connection of end 12, the electrical equipment enables control signal input 17 and connects a level signal
Source.
The soft start and stop of power supply of the Magnetic isolation control semiconductor switch of the present invention and the protective device course of work include three mistakes
Journey:Soft start-up process, soft stopped process and process is quickly protected, the idiographic flow of three processes is as follows：
Soft start-up process：Connecting pin 15 connects the high voltage of hundreds of volts in high voltage busbar connecting pin 1 and busbar loop line
Busbar, the grid no-voltage of power semiconductor switch MOSFET2, is off state, its resistance value reaches more than several megohms,
It is far longer than the resistance value of load pull down resistor 4, therefore the landing of high voltage busbar voltage is mainly in power semiconductor switch MOSFET2
On, the input voltage of electrical equipment 6 is far smaller than its operating voltage；When the condition that the condition that electrical equipment 6 is completed to be powered prepares
Under, apply the signal of a fixed frequency in pulse drive signal input terminal 12, driving low-voltage high-frequency switching tube 14 works, then
DC control control signal input 7 apply a level signal, make linear 8 output voltage of regulated power supply of low-voltage direct it is slow on
Rise；It is slow by the output one of control signal rectifier bridge 10 in the signal output that 9 output terminal of Magnetic isolation transformer is slowly risen
The control signal of rising, the signal are applied on the grid of power semiconductor switch MOSFET2, power semiconductor switch
The resistance value of MOSFET2 is gradually reduced, and electric current is slowly charged by power semiconductor switch MOSFET2 to load input capacitance 5；
As the voltage of the grid of power semiconductor switch MOSFET2 gradually rises, power semiconductor switch MOSFET2 is completely open-minded,
Its resistance value drops to tens of milliohms, and the busbar voltage complete time is in electrical equipment 6；Finally control is enabled in electrical equipment
Signal input part 17 inputs a level signal, and electrical equipment 6 is started to work, and completes soft start-up process.
Soft stopped process：Stop the enable signal that electrical equipment enables control signal input 17 first, electrical equipment 6 is stopped
Only work, then the input signal of stop pulse driving signal input 12, low-voltage high-frequency switching tube 14 is stopped, in work(
Control voltage on rate semiconductor switch MOSFET2 grids drops to zero, MOSFET closings, stops powering to electrical equipment 6, loads
Electric energy in input capacitance 5 is discharged by loading pull down resistor 4, and voltage is gradually lowered to zero in electrical equipment 6, busbar and electricity consumption
Equipment 6 separates, and finally, stops the control signal of DC control control signal input 7, the soft stop for completing power supply is stopped.
Quick protection process：In the process of running, bus-bar system detects current value and exceedes setting value, produces overcurrent letter
Number, over-current signal blocks the drive signal of pulse drive signal input terminal 12 by pulling down the grid of low-voltage high-frequency switching tube 14,
Low-voltage high-frequency switching tube 14 is stopped immediately, and control signal rectifier bridge 10 stops output, power semiconductor switch MOSFET2's
Parallel gate control resistance 3 and grid control capacitance 11 discharge between grid and source electrode, and grid voltage rapid decrease, power is partly led
Body switchs the quick cut off circuits of MOSFET2, realizes the quick protection of system.
The soft start and stop of power supply of the Magnetic isolation control semiconductor switch of the present invention and protective device can apply in " ground potential "
Power semiconductor switch mosfets 2 under the hundreds of volt high potentials of control signal control, realize busbar and electrical equipment 6 unicom and
Disconnect, while fuse, air switch and contactor can be played the role of；Control signal is realized using Magnetic isolation transformer 9
Transmission, meet requirement of the power-supply system in space environment high reliability.
Embodiment two：
As shown in Fig. 2, a kind of electrical system, including positive voltage busbar 18, negative voltage busbar loop line 19 and female to positive voltage
The high-voltage battery accumulation power supply 20 that line 18, negative voltage busbar loop line 19 are powered, wherein, the high-voltage battery accumulation power supply 20
To positive voltage busbar 18 and supply voltage 400V to the 500V of negative voltage busbar loop line 19, in positive voltage busbar 18 and negative voltage
The soft start and stop of power supply and protective device that an above-mentioned Magnetic isolation controls semiconductor switch are at least connected with busbar loop line 19,
In the present embodiment, two Magnetic isolations are connected with positive voltage busbar 18 and negative voltage busbar loop line 19 and control semiconductor switch
The soft start and stop of power supply and protective device, are respectively first device 21 and second device 22, certainly in other embodiments, Magnetic isolation control
The soft start and stop of power supply of semiconductor switch processed and protective device can be set more.
The electrical system further includes overcurrent detection sensor 23, over-current signal adjustment circuit 24 and pull-down diode 25,
The overcurrent detection sensor 23 is connected with high voltage busbar connecting pin 1, over-current signal adjustment circuit 24 respectively, the drop-down
Diode one end is connected with pulse drive signal input terminal 12, and the other end is connected with over-current signal adjustment circuit 24, the overcurrent
Detection sensor 23, for monitoring the current signal of 1 front end of high voltage busbar connecting pin, the over-current signal adjustment circuit (24)
Effect with pull-down diode 25 is：When electric current exceedes setting value, over-current signal adjustment circuit 24 exports low level signal, passes through
Pull-down diode 25 blocks the drive signal of pulse drive signal input terminal 12, and low-voltage high-frequency switching tube 14 is stopped immediately,
Realize overcurrent protection.
The electric system is applied in spacecraft, before Spacecraft Launch, due to high-voltage battery accumulation power supply 20 not
It can stop output, 19 continued power of positive voltage busbar 18 and negative voltage busbar loop line.During to launch spacecraft safety
Process in the low pressure stage, pulse drive signal input terminal 12, DC control control signal input 7 and electrical equipment make
The signal of energy control signal input 17 is stopped, and 6 input voltage of electrical equipment is very low, can prevent low pressure discharge from damaging
Bad system.When spacecraft enters high vacuum space, by soft start-up process of the present invention successively in pulse drive signal input terminal 12, straight
Flow control control signal input 7 and electrical equipment enable control signal input 17 and apply signal, complete soft start.
In 6 operational process of electrical equipment, overcurrent detection sensor 23 monitors the electric current of 1 front end of high voltage busbar connecting pin
Signal, sets protection value, then over-current signal adjustment circuit 24 exports a low level, passes through pull-down diode as current signal exceedes
25 block the drive signal of pulse drive signal input terminal 12, and low-voltage high-frequency switching tube 14 is stopped immediately, power semiconductor
The grid voltage rapid decrease of MOSFET2 is switched, the Fault Isolation of electrical equipment 6 is completed in 1 to 10 microseconds, realizes equipment
Quick protection.
As spacecraft needs to enter energy-saving mode, then it is female with positive voltage can be completed by soft stopped process for electrical equipment 6
Line 18 separates, and reduces the power consumption of system；Or spacecraft needs to return to ground, electrical equipment need to be completed according to soft stopped process
6 separate with to positive voltage busbar 18, prevent spacecraft from being damaged by the low pressure stage.
The present invention is described in detail above, it is described above, it is only the preferred embodiments of the invention, when cannot
Limit the scope of the present invention, i.e., it is all to make equivalent changes and modifications according to the application scope, it all should still belong to covering scope of the present invention
It is interior.
Claims (7)
1. the soft start and stop of power supply and the protective device of a kind of Magnetic isolation control semiconductor switch, it is characterised in that：Connected including busbar
Circuit, grid control and driving circuit and signal control signal；
The busbar link circuit includes high voltage busbar connecting pin (1), power semiconductor switch MOSFET (2), load drop-down
Resistance (4), with loading input capacitance (5), electrical equipment (6) and bus bar circuit connecting pin (15), the high voltage busbar connection
End (1) is sequentially connected in series power semiconductor switch MOSFET (2), with loading pull down resistor (4) and bus bar circuit connecting pin (15), institute
State load input capacitance (5) and electrical equipment (6) is parallel to the both ends of load pull down resistor (4)；
The grid control and driving circuit include the linear regulated power supply of low-voltage direct (8), isolating transformer (9), low-voltage high-frequency
Switching tube (14), with controlling loop line connecting pin (16) and control signal rectifier bridge (10), the linear regulated power supply of low-voltage direct
(8) with being sequentially connected in series the primary coil, low-voltage high-frequency switching tube (14) and control loop line of Magnetic isolation transformer (9) connecting pin
(16), the output terminal of Magnetic isolation transformer (9) secondary coil is connected to control signal rectifier bridge (10) ac input end, institute
State the grid that control signal rectifier bridge (10) DC output end is connected to power semiconductor switch MOSFET (2)；
The signal control signal includes DC control signal input terminal (7), pulse drive signal input terminal (12) and electricity consumption
Equipment enables control signal input (17), and the DC control signal input terminal (7) connects the linear regulated power supply of low-voltage direct
(8), pulse drive signal input terminal (12) the connection low-voltage high-frequency switching tube (14), the electrical equipment enable control signal
Input terminal (17) connection electrical equipment (6).
2. the soft start and stop of power supply of Magnetic isolation control semiconductor switch according to claim 1 and protective device, its feature exist
In：Grid control resistance (3) and grid control are parallel between the grid and source electrode of the power semiconductor switch MOSFET (2)
Capacitance (11).
3. the soft start and stop of power supply of Magnetic isolation control semiconductor switch according to claim 2 and protective device, its feature exist
In：Grid Anti-static resistor is connected between the control terminal of the low-voltage high-frequency switching tube (14) and with controlling loop line (16)
(13)。
4. the soft start and stop of power supply of Magnetic isolation control semiconductor switch according to claim 3 and protective device, its feature exist
In：The signal source of DC control signal input terminal (7) the connection linear adjustable, the pulse drive signal input terminal (12)
A high-frequency pulse signal source is connected, the electrical equipment enables control signal input (17) and connects a level signal source.
5. a kind of electrical system, including positive voltage busbar (18), negative voltage busbar loop line (19) and to positive voltage busbar (18), negative
The high-voltage battery accumulation power supply (20) of voltage bus loop line (19) power supply, it is characterised in that：In positive voltage busbar (18) and bear
One is at least connected with voltage bus loop line (19) such as the Magnetic isolation control semiconductor switch as described in claim 1-4 is any
The soft start and stop of power supply and protective device.
6. electrical system according to claim 5, it is characterised in that：Further include overcurrent detection sensor (23), overcurrent letter
Number adjustment circuit (24) and pull-down diode (25), the overcurrent detection sensor (23) respectively with high voltage busbar connecting pin
(1), over-current signal adjustment circuit (24) connects, and described pull-down diode one end is connected with pulse drive signal input terminal (12),
The other end is connected with over-current signal adjustment circuit (24).
7. electrical system according to claim 6, it is characterised in that：In positive voltage busbar (18) and negative voltage busbar loop line
(19) the soft start and stop of power supply and protective device that two Magnetic isolations control semiconductor switch are connected with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711226585.9A CN107947773B (en) | 2017-11-29 | 2017-11-29 | Power supply soft start-stop and protection device for magnetic isolation control semiconductor switch and electric system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711226585.9A CN107947773B (en) | 2017-11-29 | 2017-11-29 | Power supply soft start-stop and protection device for magnetic isolation control semiconductor switch and electric system |
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| CN107947773A true CN107947773A (en) | 2018-04-20 |
| CN107947773B CN107947773B (en) | 2024-05-31 |
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| CN105141120A (en) * | 2015-10-16 | 2015-12-09 | 兰州空间技术物理研究所 | A magnetically isolated power-on circuit |
| CN207518564U (en) * | 2017-11-29 | 2018-06-19 | 中国工程物理研究院应用电子学研究所 | The soft start and stop of power supply of Magnetic isolation control semiconductor switch and protective device and electrical system |
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| CN103208925A (en) * | 2013-04-24 | 2013-07-17 | 深圳市航天新源科技有限公司 | Isolated direct current-direct current (DC-DC) converter topological circuit |
| JP2015126596A (en) * | 2013-12-26 | 2015-07-06 | 三菱電機株式会社 | High-frequency ac power-supply device |
| CN104753329A (en) * | 2015-03-24 | 2015-07-01 | 华南理工大学 | High-power switch power source soft starting circuit |
| CN105141120A (en) * | 2015-10-16 | 2015-12-09 | 兰州空间技术物理研究所 | A magnetically isolated power-on circuit |
| CN207518564U (en) * | 2017-11-29 | 2018-06-19 | 中国工程物理研究院应用电子学研究所 | The soft start and stop of power supply of Magnetic isolation control semiconductor switch and protective device and electrical system |
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