CN110336245A - A kind of control method and device of electrical fuse - Google Patents
A kind of control method and device of electrical fuse Download PDFInfo
- Publication number
- CN110336245A CN110336245A CN201910736553.6A CN201910736553A CN110336245A CN 110336245 A CN110336245 A CN 110336245A CN 201910736553 A CN201910736553 A CN 201910736553A CN 110336245 A CN110336245 A CN 110336245A
- Authority
- CN
- China
- Prior art keywords
- signal
- control
- state
- electrical fuse
- fuse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000012545 processing Methods 0.000 claims abstract description 7
- 238000001514 detection method Methods 0.000 claims description 8
- 230000008901 benefit Effects 0.000 abstract description 4
- 230000007257 malfunction Effects 0.000 abstract description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000002955 isolation Methods 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 4
- 239000004065 semiconductor Substances 0.000 description 4
- 239000004020 conductor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000005669 field effect Effects 0.000 description 3
- 229910044991 metal oxide Inorganic materials 0.000 description 3
- 150000004706 metal oxides Chemical class 0.000 description 3
- 206010037660 Pyrexia Diseases 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 2
- 210000001367 artery Anatomy 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008054 signal transmission Effects 0.000 description 2
- 210000003462 vein Anatomy 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
- H02H3/02—Details
-
- 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
Landscapes
- Fuses (AREA)
Abstract
The present invention provides a kind of control method and device of electrical fuse, comprising the following steps: step S1: when electrical fuse is not powered, being set as channel status；Step S2: the case where electrical fuse is powered, and whether foundation external signal and electric current are more than preset value is in access or off-state.Isolated location is used for the signal being isolated between the first power domain and second source domain in device；And signal is solved, decoding processing；Signal is external signal and internal signal；External signal connects isolated location, for the state of control access unit or the internal state of display fuse.Benefit of the invention is that: there are many forms for the control working condition of fuse, realize multi-functional status display and control.Accurate to the status monitoring of fuse, stability is strong；High reliablity is controlled under various circumstances, the malfunction for effectively avoiding fuse from working.Electrical fuse is just in the conductive state when not powering.
Description
Technical field
The present invention relates to electronic circuit fields, and in particular to a kind of control method and device of electrical fuse
Background technique
Fuse is in electric system for taking precautions against the electric installation of super-high-current.If being coupled to the negative of power electronics power supply unit
Carry and from electric supply draw super-high-current, then fuse the load and power electronics power supply unit can be made to disconnect to prevent
The only thus damage in electric system caused by super-high-current.Fuse generally comprises its physical size and is selected to limit current to
In the conductor of threshold value.In the case where electric current is more than this threshold value, conductor fusing is to prevent super-high-current from damaging electric system.
For existing fuse mostly using fever fusing principle, fusing body portion is the core of fuse, is fused by fuse-link
When play the role of cut off electric current, the melt processes of fuse are more demanding, and existing fuse response speed compared with
Slowly, blowout current size is difficult to control exact value.It scraps, secondary cannot use after existing blown fuse.
Fuse is gradually switched off device substitution.Breaker is a kind of electric switch being automatically brought into operation, and is designed to protect
Circuit is from the damage caused by overcurrent or overload or short circuit.In many applications, electronic switch can be used (for example, MOS
Transistor, IGBT etc.) Lai Shixian breaker to be to disconnect protected circuit and power supply in the case where overcurrent.Such electronics
Breaker can also be referred to as electrical fuse (electrical fuse e-fuse, intelligent fuse, electrical fuse etc.).
But existing electrical fuse has the following deficiencies:
The control of fuse, working condition are single, can not achieve multi-functional status display and control.
Under various circumstances since the stability of control signal is poor, it is easy to appear the malfunction of fuse work.
Electrical fuse is in normally off state, could work normally after needing to control power supply power supply (powering on)；
And inaccuracy simple to the status monitoring of fuse, causes protection inadequate.
Summary of the invention
In order to solve the above problem: the invention proposes see it is a kind of can flexibly control and can be convenient learn the guarantor of internal state
Dangerous silk control method and its device.
In the first aspect of the present invention, a kind of control method of electrical fuse is provided,
The following steps are included:
Step S1: when electrical fuse is not powered, it is set as channel status；
Step S2: whether electrical fuse power supply is more than that the state of preset value and external signal is set as according to electric current
Access or off-state.
A preferred embodiment according to a first aspect of the present invention, the step S2 further include:
Step S21: whether detection electric current is more than preset value；
If it exceeds preset value, electrical fuse is set as off-state；
If being not above preset value, following step S22 is executed；
Step S22: detection external signal；
External signal is shutdown order, and electrical fuse is set as off-state；
Otherwise, external signal is to open order, and electrical fuse is set as channel status；
A preferred embodiment according to a first aspect of the present invention, the external signal can be level signal or pulse
Control signal.
It is high level signal or low level signal when level signal；
It is the high level pulse or low level pulse of certain time when pulse signal.
When a preferred embodiment according to a first aspect of the present invention, the external signal serial input or output, electricity
The shutdown order and opening order of ordinary mail number are respectively opposite level state.
When a preferred embodiment according to a first aspect of the present invention, the external signal serial input or output, arteries and veins
Rushing the shutdown order of signal and opening order is respectively opposite level state.
A preferred embodiment according to a first aspect of the present invention, external signal is control signal in the step S22；
A preferred embodiment according to a first aspect of the present invention, control signal is one group in the step S22, this
Group signal is inputted by a port；Control signal is serial input form.
A preferred embodiment according to a first aspect of the present invention, it is parallel input shape that the control signal, which is one group,
Formula；The shutdown order and opening order of the control signal are inputted by respective port respectively.
A preferred embodiment according to a first aspect of the present invention, the control signal can be distinguished defeated for multiple groups form
Enter.
A preferred embodiment according to a first aspect of the present invention, the control signal are two groups:
One group is the control signal for carrying out serial input；
Another group is that control access unit is turned on or off state respectively for the control signal that inputs parallel；Parallel input control
The conducting of signal and cut-off signal individually enter.
A preferred embodiment according to a first aspect of the present invention, the external signal in the step S22 can also wrap
Include internal state output signal.
A preferred embodiment according to a first aspect of the present invention, the Serial output or parallel defeated that the output signal is
Out.
A preferred embodiment according to a first aspect of the present invention, the parallel output path unit are turned on or off shape
The signal of state is exported by individually respective signal.
In the second aspect of the present invention, a kind of control device of electrical fuse is provided, comprising:
First power domain, second source domain, the first connecting pin VIN, second connection end VOUT, isolated location, control and guarantor
Protect unit, path unit and current detecting unit；
First power domain refers to the transmission of external signal and the working power domain of isolated location；The second source domain
It is the working power domain of isolated location, control and protection unit；
The isolated location is used for the signal being isolated between the first power domain and second source domain；And signal is carried out
Solution, decoding processing；The signal is external signal and internal signal；
The first connecting pin VIN, path unit, second connection end VOUT, current detecting unit are sequentially connected in series；Institute
It states path unit to be on or off-state, for controlling the conducting of the first connecting pin VIN to second connection end VOUT
State；
The current detecting unit flows through the path unit electric current for detecting；
The control and protection unit is for controlling the state of the path unit；
The external signal connects isolated location, for the state of control access unit or the inside shape of display fuse
State.
A preferred embodiment according to a second aspect of the present invention, the external signal are that level signal or pulse are believed
Number.
A preferred embodiment according to a second aspect of the present invention, the external signal are control signal, control signal
The state that is turned on or off for control access unit.
A preferred embodiment according to a second aspect of the present invention, the control signal are serial control signal；It is described
Serial control signal is connect by a port with isolated location.
A preferred embodiment according to a second aspect of the present invention, the control signal are parallel control signal；It is described
Parallel control signal includes parallel control-ON signal, parallel control-OFF signal；Parallel control-the ON signal, parallel control-
OFF signal is connect by two ports (respective port) with isolated location.
A preferred embodiment according to a second aspect of the present invention, the control signal include serial control signal and simultaneously
Row control signal；The serial control signal is connect by a port with isolated location；The parallel control signal includes simultaneously
Row control-ON signal, parallel control-OFF signal；Parallel control-the ON signal, parallel control-OFF signal pass through two ports
(respective port) is connect with isolated location.
A preferred embodiment according to a second aspect of the present invention, the external signal further includes state output signal；
The state output signal is serial presence output signal；The state output signal is connected by a port and isolated location
It connects.
A preferred embodiment according to a second aspect of the present invention, the external signal further includes state output signal；
The state output signal is parallel state output signal；Parallel state output signal includes parallel state output-channel status
Signal and parallel state output-guard mode signal；The state output signal by two ports (respective port) with every
It is connected from unit.
A preferred embodiment according to a second aspect of the present invention, the isolated location are the form of transformer isolation
Or the form of light-coupled isolation.
The invention has the following advantages that
There are many forms for the control working condition of fuse, realize multi-functional status display and control.
Accurate to the status monitoring of fuse, stability is strong；
High reliablity is controlled under various circumstances, the malfunction for effectively avoiding fuse from working.
Electrical fuse is just in the conductive state when not powering.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 electrical fuse the general frame of the present invention.
One of Fig. 2 external signal embodiment of the present invention；
The two of Fig. 3 external signal embodiment of the present invention；
The three of Fig. 4 external signal embodiment of the present invention；
The four of Fig. 5 external signal embodiment of the present invention；
The five of Fig. 6 external signal embodiment of the present invention；
Figure label explanation:
The first power domain of 1-, 2- second source domain, 11- isolated location, 12- control and protection unit, 13- path unit,
14- current detecting unit.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.Therefore, below to the reality of the invention provided in the accompanying drawings
The detailed description for applying example is not intended to limit the range of claimed invention, but is merely representative of selected implementation of the invention
Example.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
The present invention is made further to illustrate in detail, completely below with reference to examples and drawings.
Basic knowledge introduction:
" fusing integral (Melting Integral): the fusing integral of fuse is the fuse member of this fuse of fusing
Energy needed for part, also referred to as fusing value I2t.Structure, material and the cross-sectional area of fuse element determine this value.It is each
Serial fuse has used different material and element configuration according to load current value difference, it is thus determined that every fuse
I2t is very necessary.Usually in DC circuit, using 10 times of rated current as fault current, make fuse extremely short
It is disconnected in time, point-device I2t " is measured by high speed oscilloscope and integrator.
" I2t indicates the energy that the electric current passed through on conductor generates.I2t is Joule integral value, if joining as the limit
Number, then cannot surpass, if rated value, can slightly surpass a bit (must be less than limiting value)；I2t is heat accumulation value for frequency converter,
If Thermal protection is arranged in frequency converter, just will appear tripping, conversely, do not influence, if but frequency converter be constantly in overheat
State, it is bad to frequency converter.″
Electrical fuse of the present invention is combined with the function of high voltage, low-impedance power switch tube and current sense,
And the state of electrical fuse can be monitored in real time.Its design is operated under the smallest radiator.It is i.e. of the invention
Middle power switch tube impedance very little, even high current, also very little, the radiator needed are small for fever.
As shown in Fig. 1 electrical fuse the general frame of the present invention, electrical fuse includes the first power domain 1, second source
Domain 2, the first connecting pin VIN, second connection end VOUT, isolated location 11, control and protection unit 12, path unit 13 and electric current
Detection unit 14.
Here power domain refers to being worked under certain supply voltage in whole or in part of correlation module in fuse.It needs
What is illustrated be supply voltage here not only include power supply further include power supply ground；Power supply it is not necessarily 0V electricity
Pressure；It is also possible to positive voltage or negative voltage；It is low only with respect to the voltage value of power supply.Such as in common circuit
In have the power supply of analog circuit and the ground of analog circuit；The power supply of digital circuit and the ground of digital circuit.
The power supply of the first power domain 1 and power supply ground are respectively first voltage, the first ground in the present invention；Second source
The power supply and power supply ground in domain 2 are respectively second voltage, second connection end VOUT；
The transmission of external signal and the work of isolated location 11 are in the first power domain 1；Isolated location 11, control and protection list
12 work of member is in second source domain 2；Isolated location 11 is used for the signal being isolated between the first power domain 1 and second source domain 2；
Isolated location 11 is exactly the signal in order to be isolated between different electrical power domain in fact, to avoid because of signal between different electrical power domain
Working power voltage is different and signal is caused to transmit mistake, and the circuit function even resulted in different electrical power domain is abnormal.
Isolated location 11 by the signal to different electrical power domain and solved, decoded (or being known as modulation, demodulation) processing
Carry out the isolation transmission of signal between different electrical power domain.And signal mentioned herein can be divided into external signal and internal signal；
Be external signal be the first power domain 1 under signal；Inside letter is the signal under second source domain 2.
External signal is electrical fuse and the external signal for interacting control.Internal signal works in electrical fuse
Inside is the signal to work under second source domain 2 being isolated relative to external signal through isolated location 11.
First connecting pin VIN, path unit 13, second connection end VOUT and current detecting unit 14 are sequentially connected in series.
Under different conditions, path unit 13 is on or off-state.What needs to be explained here is that aforementioned first be sequentially connected in series connects
It connects end VIN, path unit 13, second connection end VOUT and current detecting unit 14 and is similar to traditional fusing function.
When path unit 13 is in the conductive state, the first connecting pin VIN to second connection end VOUT forms access, is in
(or the referred to as access) state of conducting；
When path unit 13 is in an off state, the first connecting pin VIN to second connection end VOUT formed open circuit (or
For open circuit), be in an off state.
When path unit 13 is in the conductive state, the first connecting pin VIN to second connection end VOUT forms access, and electric current is just
This access can be flowed through.Current detecting unit 14 is for detecting the size of current for flowing through path unit.
According to the size for flowing through circuit, current detecting unit 14 will issue signal to control and protection unit 12, meanwhile,
Current detecting unit 14 realizes the function curve of I2t, carrys out trigger protection with the curve of I2t.Further current detecting unit 14
The function curve that I2t is realized by fitting, can also also realize the function curve of I2t by other means.Such protection side
Formula is safer more more acurrate than what traditional fuse came, it can be set according to different products different overcurrent multiple and
The overcurrent time.
Current detecting unit 14 can realize with resistance, be also possible to current transformer, such as Hall, TMR, fluxgate,
The current transformers such as Rogowski coil.
When the first power domain 1 and second source domain 2 are not powered on and (powered), path unit 13 is in the conductive state；
After the first power domain and second source domain power on, path unit 13 is on or off-state is by control and protection unit
Control determines.
After the first power domain 1 and second source domain 12 normally power on, if the electric current for flowing through path unit 13 is more than
Scheduled value, current detecting unit 14 send a signal to control and protection unit 12；Control and protection unit 12 is in combination with outer
The state control access unit 13 of portion's signal becomes off-state.
, whereas if the first power domain 1 and second source domain 2 do not power on normally, even if flowing through the electricity of path unit 13
Stream be more than scheduled value, control and protection unit 12 will not control access unit 13 which kind of state be in.
When external signal provides the order of shutdown, become internal signal after handling by isolated location 11.Internal signal
It is in an off state by 12 control access unit 13 of control and protection unit；Conversely, when external signal provides the order of conducting
When, path unit 13 is in the conductive state.
Path unit 13 includes driving unit and power switch tube；Driving unit is used for driving power switching tube；Power is opened
The on state for closing pipe determines the on or off state of path unit.
Driving unit has 3 ports；First port 131 connects control and protection unit, second port 132 connects power and opens
Close the grid of pipe (here for ease of description, being illustrated in figure with power MOS pipe), third port 133 connects power MOS pipe source level
And current detecting unit；The drain electrode 134 of power MOS pipe connects the first connecting pin VIN.What needs to be explained here is that power here
MOS is a kind of preferred schematic form of power switch tube.
Power switch tube in special path unit can be with are as follows: technotron (Junction FET-JFET) and
Metal oxide semiconductor field effect tube (metal-oxide semiconductor FET, abbreviation MOS-FET).
Meanwhile power switch tube may be the electric-controlled switch devices such as brilliant valve pipe, silicon-controlled, relay, contactor.Power
Which kind of form switching tube specifically uses selected according to actual needs.
It can also be N-channel technotron and P-channel technotron for technotron；
Metal oxide semiconductor field effect tube or N-channel technotron and P-channel junction type field are imitated
Ying Guan；It can also be simultaneously reinforced insulation gate field-effect transistor, metal-oxide-semiconductor transistor.
As long as above-mentioned power switch tube carries out realizing different on or off states under corresponding working condition.
Such as: it from the main distinction of N-type power MOS pipe is that threshold voltage is different for N-type JFET, the threshold voltage of JFET
It is negative value, power NMOS tube is positive value, so the grid voltage of JFET and source voltage turn on when short circuit.That is JFET
Need 0V voltage that can be connected；JFET need negative pressure (such as: -15V) can turn off.
And power NMOS tube needs a positive voltage, so power MOS pipe needs 0V voltage that can turn off；Power NMOS
Pipe need positive pressure (such as: 10V), so that it may be connected.
Driving unit is mainly exactly to realize the above-mentioned effect for making power switch tube carry out on or off, is not just done here in detail
Carefully describe.
The different embodiments of external signal are introduced below:
External signal can also have other implementations, for the ease of introducing description explanation, in external signal embodiment
In attached drawing, only illustrate unit relevant to external signal, other non-schematical sections and Fig. 1 electrical fuse of the present invention are overall in figure
It is similar in block diagram.
One of the embodiment of the present invention:
As shown in one of Fig. 2 external signal embodiment of the present invention, external signal (here to control signal, illustrates control in figure
Signal processed is serial control signal) isolated location 11 is inputed to, serial control signal is used for the shape of control access unit 13 here
State (is turned on or off).
It is necessary to be noted that serial control signal can be level signal, such as serial control signal is first
When level signal (such as are as follows: high level or low level), after handling by isolated location 11, be converted to internal signal；Inside letter
Number keep path unit 13 in the conductive state by control and protection unit 12；Conversely, when control signal is second electrical level signal
(with front second electrical level signal on the contrary, for example are as follows: low level or high level), path unit 13 is in an off state.
With greater need for special instruction, in certain fields, such as the even aviation of certain industrial circles such as Electric control
In the application of aerospace rank, very high to reliability requirement, level controling signal deficiency may be because the originals such as noise, shake, interference
Because of the state of control electrical fuse that cannot be stable.
Therefore (outside) signal here can be arranged to pulse signal.When specific works: serial control signal first
When pulse signal (such as are as follows: the high level pulse or low level pulse of certain time, it may be assumed that the letter of certain pulse width
Number).After the single 11 yuan of processing of isolation, internal signal is converted to；Internal signal makes access list by control and protection unit 12
Member 13 is in the conductive state；Conversely, (with front second electrical level signal on the contrary, example when serial control signal is the second pulse signal
Such as are as follows: low level pulse or high level pulse), path unit 13 is in an off state.
The two of the embodiment of the present invention:
As shown in the two of Fig. 3 external signal embodiment of the present invention, external signal (controls signal here, shows in figure here
Mean parallel control-open, parallel control-pass) input to isolated location 11, for control access unit 13 state (conducting or
It disconnects).
Pass through a signal port input unlike the case where serial control signal is similar to time-sharing multiplex in previous embodiment one.
Here parallel control-is opened, the effect of parallel control-pass is will to be used to control access unit 13 be turned on or off the signal point of state
Drive capable input into.Here the benefit being separately controlled is that the reliability of electrical fuse work is higher.
When the state of control access unit 13 is conducting, corresponding signal is inputted by parallel control-ON signal port；
When the state of control access unit 13 is to disconnect, corresponding signal is inputted by parallel control-OFF signal port.
It is similar with the signal of preceding embodiment one, it here can be level signal, or pulse signal；Equally, arteries and veins
The reliability for rushing signal is higher.Particularly as not being described in detail.Only it is emphasized that parallel control-open, parallel control-
Difference is closed to input simultaneously.
Control and protection unit can judge control signal.If parallel control-is opened, parallel control-pass is defeated simultaneously
It is fashionable, it is judged as abnormal operation, corresponding control signal will not be issued to path unit 13, is i.e. 13 state of path unit is protected
It holds constant.
The three of the embodiment of the present invention:
As shown in the three of Fig. 4 external signal embodiment of the present invention, embodiment three is similar to the combination of embodiment one and two.This
In control signal input be that serial control signal, parallel control-are opened, parallel control-pass input pulse controls signal；It is such good
Place is can be for different application environments using different external signals, thus in the different working condition of different external environments
Under reach different reliability requirements.
In order to improve the using flexible of electrical fuse, using degree of intelligence；For external signal, it is also possible to wrap
Include the state displaying signal of different operating situation inside electrical fuse.
The four of the embodiment of the present invention:
As shown in the four of Fig. 5 external signal embodiment of the present invention, the control signal in explanatory diagram can be previous embodiment
One to three any one form, here only to facilitate illustrating to simplify signal.External signal (serial control signal in figure and
Serial presence output signal) in state output exported by isolated location 11.Here state output, which refers to, shows path unit
13 are in which kind of state (being turned on or off).The state of path unit is learnt by the detection of control and protection unit 12, is controlled simultaneously
It will test result with protection location 12 and output successively transmitted to external signal by internal signal, isolated location 13, that is, here
State output signal.
The different conditions of state output signal represent being turned on or off for path unit, that is, represent electrical fuse
Be turned on or off state.
In order to better understand the different operating situation of electrical fuse, so as to more reliable control it.State output
Signal further can be optimized or be improved.
The five of the embodiment of the present invention:
As shown in the five of Fig. 6 external signal embodiment of the present invention, the control signal in explanatory diagram can be previous embodiment
One to three any one form, here only to facilitate illustrating to simplify signal.
(serial control signal, parallel state output-channel status, parallel state export-in figure protect shape to external signal
State) in parallel state output-channel status and parallel state output-guard mode exported by isolated location.
Here parallel state output-channel status is similar to the effect of state output signal in example IV, here
No longer describe.Parallel state output-guard mode refers to whether the electric current shown in path unit 13 is more than scheduled value.
When the electric current in path unit 13 is more than scheduled value, current detecting unit 14 can be to control and protection unit 12
A status signal is issued, control and protection unit 12 successively transmits output to external letter by internal signal, isolated location 11
Number；That is, states in parallel output-guard mode signal here.
When the electric current in path unit 13 is not above scheduled value, current detecting unit 14 can give control and protection list
Member 12 issues another status signal, and control and protection unit 12 successively transmits output by internal signal, isolated location 11
To external signal；That is, states in parallel output-guard mode signal here.
To it is known that electrical fuse can either show the shape that is turned on or off of path unit in embodiment five
State；The case where whether electric current is more than scheduled value in electrical fuse can be shown again.
In practical application, these show that the signal of electrical fuse different conditions can be sent to external processing module
(MCU, controller unit etc.) carries out processing analysis.
It can be diversified forms for the isolated location in the present invention.No matter it should be noted which kind of form, isolation is single
Member needs to meet the transfer function of external signal in the different embodiment of aforementioned external signal of the present invention.It can be transformer isolation
Form, or the form of light-coupled isolation.
For isolated location, the present invention can be from external signal to internal signal in practice or from internal signal
To external signal, the transmission of multiple signals also may include.I.e. according to the different embodiments of said external signal, they can have
Multiple and different signal transmission, and one-way transmission may be implemented (external signal is to internal signal or from internal signal to outside
Signal), transmitted in both directions (external signal to internal signal is simultaneously from internal signal to external signal) also may be implemented, only
The difference of input/output signal is different with direction.
According to the design feature of aforementioned fuse, the present invention also provides the control methods for having gone out a kind of electrical fuse: tool
Body the following steps are included:
Step S1: when electrical fuse is not powered, it is set as channel status；
Step S2: the case where electrical fuse is powered, and whether foundation external signal and electric current are more than preset value is in access
Or off-state.
Step S2 is also specifically included:
Step S21: whether detection electric current is more than preset value；
If it exceeds preset value, electrical fuse is set as off-state；
If being not above preset value, following step S22 is executed；
Step S22: detection external signal；External signal is shutdown order, and electrical fuse is set as off-state；It is no
Then, external signal is to open order, and electrical fuse is set as channel status；
Particularly, external signal is control signal in step S22；
External signal can be there are many embodiment in step S22
One of embodiment of the method for the invention:
Input control signal only has one group in step S22:
This group of signal is inputted by a port；Control signal is serial input form at this time.
The two of embodiment of the method for the invention:
For the stability for the signal that tightens control, controlling signal can also be parallel input form for one group.
That is: shutdown order and opening order is inputted by respective port respectively.
The three of embodiment of the method for the invention:
As previously described, in order to more reliable in certain specific uses (Aeronautics and Astronautics etc.), the signal that tightens control it is steady
It is qualitative.
Control signal can also input parallel for multiple groups form.Such as two groups of control signals control simultaneously.
One group is the control signal for carrying out serial input；
Another group is parallel input form control access unit different conditions (being turned on or off)；Its conducting and disconnection letter
It number individually enters.
I.e. when the control signal of serial input and parallel control signal be same order (such as: serial input " shutdown life
Enable " and parallel input " shutdown order " when, fuse can just execute the operation of shutdown) when can just execute corresponding operation, otherwise,
It will be considered that it is illegal command.
It here is the combination of above two form.
The four of embodiment of the method for the invention:
Meanwhile in order to the state of clearer display fuse, the external signal in step S22 can also include interior
The state output signal in portion；Here internal state is mainly the case where whether electric current of fuse is more than preset value display.
State output signal may be single Serial output.
It may be parallel output, the state of path unit different conditions (being turned on or off) passes through individually respective at this time
Signal output.It can be level signal or pulse control signal that signal is controlled in preceding method.
It is high level " 1 " signal or low level " 0 " signal when level signal；
When pulse control signal, be certain time high level pulse (upward pulse) or low level pulse (to
Under pulse).
When controlling signal serial input, the shutdown order and opening order of level signal are respectively opposite level state.
That is a state is high level " 1 ", another state is low level " 0 ".As long as their level state is opposite, it is not
Say that shutdown order is exactly fixed high level or low level.But in the control of specific signal, just do not changing after setting.
Pulse controlled serial input is similar with level signal, only high level or low level become high level pulse or
Low level pulse signal.
State output signal is similar with control signal in preceding method, can be level signal or pulse control signal.Its
Particular state be not just described in detail.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of control method of electrical fuse, comprising the following steps:
Step S1: when electrical fuse is not powered, it is set as channel status；
Step S2: whether electrical fuse power supply is more than that the state of preset value and external signal is set as access according to electric current
Or off-state.
2. the control method of electrical fuse as described in claim 1, which is characterized in that the step S2 further include:
Step S21: whether detection electric current is more than preset value；
If it exceeds preset value, electrical fuse is set as off-state；
If being not above preset value, following step S22 is executed；
Step S22: detection external signal；
External signal is shutdown order, and electrical fuse is set as off-state；
Otherwise, external signal is to open order, and electrical fuse is set as channel status.
3. the control method of electrical fuse as claimed in claim 2, which is characterized in that the external signal can be level
Signal or pulse control signal:
It is high level signal or low level signal when level signal；
It is the high level pulse or low level pulse of certain time when pulse control signal.
4. the control method of electrical fuse as claimed in claim 3, which is characterized in that the external signal serial input or
When output,
The shutdown order and opening order of level signal are respectively opposite level state；
The shutdown order and opening order of pulse control signal are respectively opposite pulse condition.
5. a kind of control device of electrical fuse according to any proposition of Claims 1-4, comprising:
First power domain, second source domain, the first connecting pin VIN, second connection end VOUT, isolated location, control and protection list
Member, path unit and current detecting unit；
The isolated location is used for the signal being isolated between the first power domain and second source domain；And signal is solved, is translated
Code processing；The signal is external signal and internal signal；
The first connecting pin VIN, path unit, second connection end VOUT, current detecting unit are sequentially connected in series；It is described logical
Road unit is on or off-state, for controlling the on state of the first connecting pin VIN to second connection end VOUT；
The current detecting unit flows through the path unit electric current for detecting；
The control and protection unit is for controlling the state of the path unit；
The external signal connects isolated location, for the state of control access unit or the internal state of display fuse, institute
Stating external signal includes control signal.
6. the control device of electrical fuse as claimed in claim 5, which is characterized in that the control signal is Serial Control
Signal；The serial control signal is connect by a port with isolated location.
7. the control device of electrical fuse as claimed in claim 5, which is characterized in that the control signal is parallel control
Signal；
The parallel control signal includes parallel control-ON signal, parallel control-OFF signal；
Parallel control-the ON signal, parallel control-OFF signal pass through respective port respectively and connect with isolated location.
8. the control device of electrical fuse as claimed in claim 5, which is characterized in that the control signal includes serial control
Signal and parallel control signal processed；
The serial control signal is connect by a port with isolated location；
The parallel control signal includes parallel control-ON signal, parallel control-OFF signal；
Parallel control-the ON signal, parallel control-OFF signal are connect by respective port with isolated location.
9. the control device of electrical fuse as claimed in claim 5, which is characterized in that the external signal further includes state
Output signal；
The state output signal is serial presence output signal；The state output signal passes through a port and isolated location
Connection.
10. the control device of electrical fuse as claimed in claim 5, which is characterized in that the external signal further includes shape
State output signal；
The state output signal is parallel state output signal；
Parallel state output signal includes parallel state output-channel status signal and parallel state output-guard mode signal；
The state output signal is connect by respective port with isolated location.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910736553.6A CN110336245A (en) | 2019-08-09 | 2019-08-09 | A kind of control method and device of electrical fuse |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910736553.6A CN110336245A (en) | 2019-08-09 | 2019-08-09 | A kind of control method and device of electrical fuse |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110336245A true CN110336245A (en) | 2019-10-15 |
Family
ID=68149128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910736553.6A Pending CN110336245A (en) | 2019-08-09 | 2019-08-09 | A kind of control method and device of electrical fuse |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110336245A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101034886A (en) * | 2006-03-09 | 2007-09-12 | 展嘉科技股份有限公司 | Electromagnetic coupling solid relay with output feedback |
| CN103094875A (en) * | 2012-12-26 | 2013-05-08 | 中国航天时代电子公司 | Solid state power controller based on microcontroller |
| TW201438362A (en) * | 2013-03-19 | 2014-10-01 | Delta Electronics Inc | Electronic fuse apparatus and method of operating the same |
| CN107317314A (en) * | 2017-08-15 | 2017-11-03 | 中国航天时代电子公司 | A kind of solid-state power controller with current-limiting protection and inverse time-lag protection function |
| CN209134044U (en) * | 2018-10-26 | 2019-07-19 | 潍坊歌尔电子有限公司 | A kind of short-circuit protection circuit and electronic product |
| CN210640681U (en) * | 2019-08-09 | 2020-05-29 | 无锡启腾电子科技有限公司 | Control device of electronic fuse |
-
2019
- 2019-08-09 CN CN201910736553.6A patent/CN110336245A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101034886A (en) * | 2006-03-09 | 2007-09-12 | 展嘉科技股份有限公司 | Electromagnetic coupling solid relay with output feedback |
| CN103094875A (en) * | 2012-12-26 | 2013-05-08 | 中国航天时代电子公司 | Solid state power controller based on microcontroller |
| TW201438362A (en) * | 2013-03-19 | 2014-10-01 | Delta Electronics Inc | Electronic fuse apparatus and method of operating the same |
| CN107317314A (en) * | 2017-08-15 | 2017-11-03 | 中国航天时代电子公司 | A kind of solid-state power controller with current-limiting protection and inverse time-lag protection function |
| CN209134044U (en) * | 2018-10-26 | 2019-07-19 | 潍坊歌尔电子有限公司 | A kind of short-circuit protection circuit and electronic product |
| CN210640681U (en) * | 2019-08-09 | 2020-05-29 | 无锡启腾电子科技有限公司 | Control device of electronic fuse |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20220255310A1 (en) | Solid-state circuit interrupters | |
| CN109696624B (en) | Monitoring method and system for disconnecting link control loop | |
| CN108028527B (en) | Protective device | |
| CN109510450A (en) | A kind of reverse connecting protection method and photovoltaic generating system | |
| WO2022242418A1 (en) | Switching circuit and method for line channel | |
| CN104422896A (en) | Method and device for detecting direct current crossing in double direct-current power source systems | |
| CN110416968A (en) | A kind of electrical fuse and its working method | |
| CN110311352A (en) | A kind of electrical fuse of self-powered management function | |
| CN210640681U (en) | Control device of electronic fuse | |
| CN207992860U (en) | Digital output circuit and industrial control equipment | |
| CN110336245A (en) | A kind of control method and device of electrical fuse | |
| CN110417388A (en) | A kind of photovoltaic module switching off device and photovoltaic power generation safety system | |
| CN210608512U (en) | Electronic fuse with power management function | |
| CN109787596A (en) | Overcurrent protection circuit, switching tube drive circuit and electric equipment | |
| CN116154973B (en) | Intelligent load identification method and electronic circuit breaker comprising same | |
| CN210629076U (en) | Electronic fuse with multiple transmission modes | |
| CN210629075U (en) | Electronic fuse | |
| CN209448425U (en) | A kind of three-phase anti-misconnection circuit and corresponding air-conditioning | |
| CN110380381A (en) | A kind of electrical fuse of multiple transmission modes | |
| CN113936941B (en) | Switching device and power distribution system | |
| CN104953535A (en) | Breaking circuit and active type breaking protection device applying same | |
| CN106771807B (en) | The detection method of heater switch fault | |
| CN206224281U (en) | Exchange 24V switches have the SSR controllers of the type that is galvanically isolated | |
| CN109495032A (en) | A kind of motor driven power module circuit | |
| CN206135412U (en) | Control circuit that crush -cutting traded is treated to silicon controlled rectifier more |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |