CN108872672A - Based on short-circuit test overvoltage photoelectric insulating protection device - Google Patents
Based on short-circuit test overvoltage photoelectric insulating protection device Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/22—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-emitting devices, e.g. LED, optocouplers
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- G—PHYSICS
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- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
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- G01R1/36—Overload-protection arrangements or circuits for electric measuring instruments
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
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Abstract
The invention discloses one kind to be based on short-circuit test overvoltage photoelectric insulating protection device; including photoelectric isolation module, photoelectric isolation module includes that electric resistance partial pressure module, electric signal for exporting to electric resistance partial pressure module carry out the photoisolator of optocoupler effect, the overcurrent and overvoltage protective module for carrying out over-current over-voltage protection to the light emitting diode being encapsulated in photoisolator, connect with photoisolator and be the power module that photoisolator is powered；The present invention uses photoisolator, and the dual protection mechanism formed by overcurrent-overvoltage protecting circuit and reverse protection circuit realizes defencive function during short-circuit test overvoltage, greatly reduces cost, improve service efficiency；The device has filled up domestic technique research and development blank, the direct economic benefit that can be generated compared with external import same type equipment is more than 280,000 yuan, cost-effectiveness reaches 4666.67 times, has low cost, the obvious advantage of high benefit, has high market popularization value.
Description
Technical field
The present invention relates to a kind of photoelectric insulating protection devices, more particularly to one kind to be based on short-circuit test overvoltage Phototube Coupling
Protective device.
Background technique
Photoisolator has good buffer action using light as media transmission electric signal, to input, output electric signal, each
It is widely used in kind circuit.There is many no small ringing pulses, these ringing pulse meetings in industrial application environment
The transmission of data, or even the equipment of injury interconnection are influenced, in order to communicate to obtain faultless number in high-speed field bus
According to transmission, industrial system design engineer has to handle these interference, it will usually using having the function of to be dielectrically separated from
Photoisolator maintain the integrality of data and protect interconnection equipment.Currently, domestic for being based on short-circuit test overvoltage
Photoelectric insulating protection device there is no the research and development of similar-type products, also the not no disclosure of similar-type products, substantially by from foreign countries
Import equipment or device, but import is expensive based on short-circuit test overvoltage photoelectric insulating protection device, it is easy to damage or ruin
Bad and maintenance of equipment maintenance cost is high, for example according to U.S.'s similar-type products price budget, a set of Phototube Coupling inlet device
Need nearly 30,000 yuan of RMB；Further, since needing the reason of import, so that the equipment purchase period lengthens, and lead to operating cost
It is significantly increased, the service efficiency of equipment substantially reduces.
Summary of the invention
Present invention solves the technical problem that be to overcome the deficiencies of existing technologies, provide it is a kind of using photoisolator, pass through
The dual protection mechanism that overcurrent-overvoltage protecting circuit and reverse protection circuit are formed realizes during short-circuit test overvoltage
Defencive function and greatly reduce cost and improve service efficiency based on short-circuit test overvoltage Phototube Coupling protect fill
It sets.
In order to solve the above-mentioned technical problem, the present invention is addressed by following technical proposals：
Include based on short-circuit test overvoltage photoelectric insulating protection device, including photoelectric isolation module, photoelectric isolation module
For to sample port voltage carry out voltage sampling and sampling voltage is divided electric resistance partial pressure module, for pair
The electric signal of electric resistance partial pressure module output carries out the photoisolator of optocoupler effect, for the hair being encapsulated in photoisolator
Optical diode carries out the overcurrent and overvoltage protective module of over-current over-voltage protection, connect with photoisolator and is photoisolator power supply
Power module, electric resistance partial pressure module, overcurrent and overvoltage protective module, photoisolator are sequentially connected.By electric resistance partial pressure module, light
It is the invention patent based on short that electric isolator, overcurrent and overvoltage protective module, power module, which combine the photoelectric isolation module to be formed,
Drive test tries the core of overvoltage photoelectric insulating protection device, has the following advantages that and characteristic：First is that respectively to the present apparatus and similar
The import equipment or device of type carry out full real-time waveform test and compare, and test result is shown：The comparison waveform of import equipment is in wave
There is 1% or more Zuo You distortion in shape distortion, and present apparatus synchronous waveform degree reaches 100%, therefore, it is possible to determine that the present apparatus
Measurement level has reached international most advanced level, and practical effect is higher by the same type device of external import, fills up
Domestic technique researches and develops blank；Second is that the present apparatus measures comparison to five kinds of voltages of DC port, by straight with actual test
Measurement data comparison is connect, comparison result is shown：The complete degree of approximation of voltage reaches 100%, the target before remote super test；Three
It is that the present apparatus has been subjected to circuit-breaker testing, the actual measurements test such as steady state voltage test, data acquisition is complete, before remote super test
Target；Fourth is that test of the present apparatus through industrial frequency withstand voltage 5000V, impulse withstand voltage 20000V, does not generate overvoltage to output
Phenomenon may insure subsequent equipment safety, the target before remote super test from safety；Fifth is that the every set of the present apparatus is practical
Totle drilling cost less than 60 yuans, and need nearly 30,000 yuans from a set of same type device of external import, every set
The totle drilling cost of the present apparatus is only the 1/400 of import same type device price, is not only able to satisfy domestic demand, but also significantly
Save the various costs such as use, operation, the maintenance of Liao Ge party in request, the target of remote super technical research；Sixth is that the present apparatus can
Thorough isolated DC overvoltage signal, prevents the damage of data collection system collection plate：Every piece of collection plate is 50,000 yuans,
Procurement cycle about needs 3-6 months；It is calculated for just putting into operation and burning out two pieces of collection plates using one month, is only acquired
Plate one, so that it may save 100,000 yuan of maintenance of equipment expense；And calculated with each test experiments workload situation at present, if 3 months
It is not available data collection system, direct economic loss will be caused to surpass million yuan；Seventh is that the inner parameter of the present apparatus has formed mark
Standardization, normalization, have had to form commercialization operation condition.
Preferably, overcurrent and overvoltage protective module is equipped with overcurrent-overvoltage protecting circuit, overcurrent-overvoltage protecting circuit includes the
One diode, the cathode of first diode are connect with the anode of electric resistance partial pressure module, light emitting diode respectively, first diode
The connection of the cathode of anode and light emitting diode.If the voltage signal of electric resistance partial pressure module output is generated when inputting light emitting diode
Instantaneous voltage value is more than normal voltage value, then first diode is breakdown, thus by puncturing first diode for electric resistance partial pressure
Circuit between module and light emitting diode disconnects, thus protect light emitting diode not breakdown by puncturing first diode,
Therefore it is able to that photoisolator is protected not to be damaged.Since the cost of the present apparatus is largely focused on photoisolator element,
Even if needing replacing new first diode there is a situation where first diode is breakdown, and first diode is relative to photoelectricity
Cost is much lower for isolator and first diode is cheap, replaces a first diode also less than 60 yuans,
And it is very convenient to replace first diode, therefore, has huge cost excellent compared with the device of import same type
Gesture and use value.
Preferably, overcurrent-overvoltage protecting circuit further includes first for limiting the size of current for flowing into light emitting diode
Current-limiting resistance, the first current-limiting resistance are connected in series between the cathode of first diode and the anode of light emitting diode.Wherein,
One current-limiting resistance is 1K Ω；If flowing through normal current value of the size of current more than light emitting diode of light emitting diode, first
Current-limiting resistance is limited in the normal current value of light emitting diode the size of current for flowing through light emitting diode；Due to the first current limliting
The metering function of resistance, avoid flow through light emitting diode electric current it is excessive and puncture light emitting diode, to further protect
Photoisolator is protected.Since the first current-limiting resistance cost is extremely cheap, for the cost of photoisolator it is micro- its
It is micro-, it can be neglected with for the Phototube Coupling device of import, even if since overcurrent causes to damage, it is only necessary to periodically dimension
Shield updates.
Preferably, overcurrent-overvoltage protecting circuit further includes the overcurrent for limiting the size of current for flowing through first diode
The anode of overvoltage protection resistance, over-current over-voltage protection resistance and first diode is connected in series.The work of over-current over-voltage protection resistance
The size of current of first diode is flowed through with being to limit, it is breakdown to avoid that there is a situation where first diodes, to realize
Overcurrent protection effect to first diode.
Preferably, over-current over-voltage protection resistance includes that simultaneously adjustable resistor is big with the series connection of the anode of first diode
Small adjustable resistor, with concatenated second current-limiting resistance of adjustable resistor, pass through adjustable resistor and the second current-limiting resistance
It is connected in series to adjust the size of current for flowing through first diode, so that the size of current of first diode is flowed through in limitation.Wherein,
The resistance adjustment range of adjustable resistor is 0-20K Ω, and the second current-limiting resistance is 10K Ω；If flowing through the electric current of first diode
Size is more than the normal current value of first diode, then by tuning up adjustable resistor until the electric current of first diode will be flowed through
Until big minor adjustment to normal current value；Due to the over-current over-voltage protection resistance formed by adjustable resistor and the second current-limiting resistance
Presence further ensure first diode not so that the size of current for flowing through first diode is maintained at normal current value
It can be there is a situation where breakdown, to realize the overcurrent protection effect to first diode.Due to adjustable resistor and
Two current-limiting resistances add up to it is low in cost, it is very little for the cost of first diode, set with the Phototube Coupling of import
It can be neglected for standby or device, even if since overcurrent causes to damage, it is only necessary to which periodic maintenance updates.
Preferably, further including for carrying out the anti-of overcurrent protection to the photosensitive semiconductor pipe being encapsulated in photoisolator
To protective module, reverse protection module is connect with photosensitive semiconductor pipe；Reverse protection module is equipped with reverse protection circuit, reversed to protect
Protection circuit includes the third current-limiting resistance for limiting the size of current for the emitter for flowing through photosensitive semiconductor pipe, third current limliting electricity
Resistance is connect with the emitter of photosensitive semiconductor pipe.If flowing through the size of current of photosensitive semiconductor pipe just more than photosensitive semiconductor pipe
Normal current value, then third current-limiting resistance is limited in the normal electricity of photosensitive semiconductor pipe to the size of current for flowing through photosensitive semiconductor pipe
In flow valuve；Due to the metering function of third current-limiting resistance, avoid flow through photosensitive semiconductor pipe electric current it is excessive and by photosensitive half
Conductor tube breakdown, to further protect photoisolator.Since third current-limiting resistance cost is extremely cheap, relative to photoelectricity
It is very little for the cost of isolator, it can be neglected with for the Phototube Coupling device of import, even if due to mistake
Conductance causes to damage, it is only necessary to which periodic maintenance updates.
Preferably, reverse protection circuit further includes the second diode, the both ends of the second diode are partly led with photosensitive respectively
The collector of body pipe is connected with third current-limiting resistance.Wherein, third current-limiting resistance is 1K Ω；If the collector of photosensitive semiconductor pipe
The instantaneous voltage value that end voltage between emitter generates is more than the normal voltage value of photosensitive semiconductor pipe, then the second diode
It is breakdown, thus disconnected the circuit between photosensitive semiconductor pipe and rear class test equipment by the second diode of breakdown, thus
It is not breakdown by the second diode protection photosensitive semiconductor pipe of breakdown, therefore be able to that photoisolator is protected not to be damaged.By
It is largely focused on photoisolator element in the cost of the present apparatus, even if being needed there is a situation where the second diode is breakdown
The second diode more to renew, and the second diode cost for photoisolator is much lower and the second diode valence
Lattice are cheap, replace second diode also less than 60 yuans, and the second diode of replacement is very convenient, therefore, with
The device of import same type, which is compared, has huge cost advantage and use value.
Preferably, reverse protection circuit further includes the 4th current limliting for limiting the size of current for flowing through the second diode
Resistance, the 4th current-limiting resistance are connected in series between the second diode and third current-limiting resistance.Wherein, the 4th current-limiting resistance is 1K
Ω；If the size of current for flowing through the second diode is more than the normal current value of the second diode, the 4th current-limiting resistance is to flowing through
The size of current of second diode is limited in the normal current value of the second diode；Since the current limliting of the 4th current-limiting resistance is made
With, avoid flow through the second diode electric current it is excessive and by the second diode breakdown, to protect the second diode, thus
Further protect photoisolator.It is micro- for the cost of the second diode since the 4th current-limiting resistance is low in cost
Its is micro-, can be neglected with for the Phototube Coupling device of import, even if since overcurrent causes to damage, it is only necessary to fixed
Phase maintenance updates.
Preferably, electric resistance partial pressure module is equipped with resistor voltage divider circuit, resistor voltage divider circuit includes for sample
Port voltage carry out the divider resistance that is divided of sample resistance, the voltage for being taken to sample resistance of voltage sampling,
Sample resistance is connected with divider resistance, and the both ends of divider resistance are connect with the anode and cathode of light emitting diode respectively, the first limit
Leakage resistance is connected in series between divider resistance and the anode of light emitting diode.Wherein, 5 sample resistance tandem compound formation take
Sample circuit, each sample resistance are 33K ' Ω, and divider resistance is 3K ' Ω.
Preferably, further include the current regulating module being connected on the port of sample, voltage regulator module,
Current regulating module includes prime impedance for adjusting the electric current for flowing through sample and rear class impedance, connects with prime impedance
And the time for being used to adjust the prime inductance of the time constant of prime impedance, connecting with rear class impedance and being used to adjust rear class impedance
The rear class inductance of constant, prime impedance, prime inductance, rear class impedance, rear class inductance are both connected on the port of sample；Electricity
Pressure adjustment module includes the varistor limited for the port voltage of the input terminal to sample, varistor connection
On the port of sample.Due to the presence of varistor, so that when the port voltage of sample exceeds 2500V, pressure
Voltage is limited in 2500V by quick resistance, so that the port voltage of the input terminal of sample is stably held in 2500V, from
And it ensure that the stability of the input voltage of photoelectric isolation module and electric resistance partial pressure module.
The present invention has significant technical effect due to using above technical scheme：Using photoisolator, passed through
The dual protection mechanism that voltage protection circuit and reverse protection circuit are formed is flowed through, is realized during short-circuit test overvoltage
Defencive function greatly reduces cost, improves service efficiency；The device filled up domestic technique research and development blank, with foreign countries into
It is more than 280,000 yuan that mouth same type equipment, which compares the direct economic benefit that can be generated, and cost-effectiveness reaches 4666.67 times, has
Low cost, the obvious advantage of high benefit, have high market popularization value.
Detailed description of the invention
Fig. 1 is the functional block diagram of the invention based on short-circuit test overvoltage photoelectric insulating protection device embodiment.
Fig. 2 is the functional block diagram of photoelectric isolation module embodiment of the invention.
Fig. 3 is the circuit diagram of photoelectric isolation module embodiment of the invention.
Fig. 4 be the two-photo pole switch direct current of the invention based on short-circuit test overvoltage photoelectric insulating protection device embodiment just
Normal operating characteristics tests connection figure.
Fig. 5 is that the two-photo pole switch direct current of the invention based on short-circuit test overvoltage photoelectric insulating protection device embodiment is short
Connection figure is tested in road test.
Fig. 6 is that the single-pole switch direct current of the invention based on short-circuit test overvoltage photoelectric insulating protection device embodiment is short
Connection figure is tested in road test.
Specific embodiment
Present invention is further described in detail with embodiment with reference to the accompanying drawing.
Based on short-circuit test overvoltage photoelectric insulating protection device, as shown in figures 1 to 6, including photoelectric isolation module 1, light
Being electrically isolated module 1 includes the electricity for carrying out voltage sampling for the port voltage to sample 2 and being divided to sampling voltage
Resistance division module 11, the electric signal for exporting to electric resistance partial pressure module 11 carry out the photoisolator 13 of optocoupler effect, are used for
To the light emitting diode 131 that is encapsulated in photoisolator 13 carry out over-current over-voltage protection overcurrent and overvoltage protective module 12, with
Photoisolator 13 connects and is the power module 15 that photoisolator 13 is powered, electric resistance partial pressure module 11, over-current over-voltage protection
Module 12, photoisolator 13 are sequentially connected.
In the present embodiment, overcurrent and overvoltage protective module 12 is equipped with overcurrent-overvoltage protecting circuit 120, overcurrent-overvoltage protecting circuit
120 include first diode 1201, the cathode of first diode 1201 respectively with electric resistance partial pressure module 11, light emitting diode 131
Anode connection, the anode of first diode 1201 connect with the cathode of light emitting diode 131.
In the present embodiment, overcurrent-overvoltage protecting circuit 120 further includes for limiting the electric current for flowing into light emitting diode 131
First current-limiting resistance 1204 of size, the first current-limiting resistance 1204 are connected in series in the cathode of first diode 1201 and shine
Between the anode of diode 131.
In the present embodiment, overcurrent-overvoltage protecting circuit 120 further includes for limiting the electric current for flowing through first diode 1201
The anode of the over-current over-voltage protection resistance of size, over-current over-voltage protection resistance and first diode 1201 is connected in series.
In the present embodiment, over-current over-voltage protection resistance includes being connected in series and being adjusted with the anode of first diode 1201
The adjustable resistor 1202 of 1202 size of resistance and concatenated second current-limiting resistance 1203 of adjustable resistor 1202, by adjustable
Economize on electricity resistance 1202 with second current-limiting resistance 1203 be connected in series to adjust the size of current for flowing through first diode 1201, thus
The size of current of first diode 1201 is flowed through in limitation.
It further include for carrying out overcurrent to the photosensitive semiconductor pipe 132 being encapsulated in photoisolator 13 in the present embodiment
The reverse protection module 14 of protection, reverse protection module 14 are connect with photosensitive semiconductor pipe 132；Reverse protection module 14 is equipped with anti-
To protection circuit 140, reverse protection circuit 140 includes big for limiting the electric current for the emitter for flowing through photosensitive semiconductor pipe 132
Small third current-limiting resistance 1403, third current-limiting resistance 1403 are connect with the emitter of photosensitive semiconductor pipe 132.
In the present embodiment, reverse protection circuit 140 further includes the second diode 1401, the both ends of the second diode 1401
It is connect respectively with the collector of photosensitive semiconductor pipe 132 and third current-limiting resistance 1403.
In the present embodiment, reverse protection circuit 140 further includes for limiting the size of current for flowing through the second diode 1401
The 4th current-limiting resistance 1402, the 4th current-limiting resistance 1402 is connected in series in the second diode 1401 and third current-limiting resistance
Between 1403.
In the present embodiment, electric resistance partial pressure module 11 is equipped with resistor voltage divider circuit 110, and resistor voltage divider circuit 110 includes being used for
Sample resistance 1101, the voltage for being taken to sample resistance 1101 of voltage sampling are carried out to the port voltage of sample 2
The divider resistance 1102 divided, sample resistance 1101 are connected with divider resistance 1102, the both ends difference of divider resistance 1102
It is connect with the anode and cathode of light emitting diode 131, the first current-limiting resistance 1204 is connected in series in divider resistance 1102 and shines
Between the anode of diode 131.
It further include the current regulating module 3 being connected on the port of sample 2, voltage adjusting in the present embodiment
Module 4, current regulating module 3 include prime impedance 31 for adjusting the electric current for flowing through sample 2 and rear class impedance 33,
The prime inductance 32 of the time constant of prime impedance 31 is connected and be used to adjust with prime impedance 31, is connected simultaneously with rear class impedance 33
For adjusting the rear class inductance 34 of the time constant of rear class impedance 33, prime impedance 31, prime inductance 32, rear class impedance 33, after
Grade inductance 34 is both connected on the port of sample 2；Voltage regulator module 4 includes for the input terminal to sample 2
The varistor 40 that port voltage is limited, varistor 40 are connected on the port of sample 2.
In short, the foregoing is merely presently preferred embodiments of the present invention, it is all according to equalization made by scope of the present invention patent
Variation and modification, shall all be covered by the patent of the invention.
Claims (10)
1. being based on short-circuit test overvoltage photoelectric insulating protection device, it is characterised in that：Including photoelectric isolation module (1), photoelectricity
Isolation module (1) includes carrying out voltage sampling for the port voltage to sample (2) and being divided to sampling voltage
Electric resistance partial pressure module (11), the electric signal for exporting to electric resistance partial pressure module (11) carry out the photoisolator of optocoupler effect
(13), for carrying out the overcurrent-overvoltage of over-current over-voltage protection to the light emitting diode (131) being encapsulated in photoisolator (13)
Protective module (12), the power module (15) for connecting and be photoisolator (13) power supply with photoisolator (13), resistance point
Die block (11), overcurrent and overvoltage protective module (12), photoisolator (13) are sequentially connected.
2. according to claim 1 be based on short-circuit test overvoltage photoelectric insulating protection device, it is characterised in that：It crosses and flows through
Protective module (12) are pressed to be equipped with overcurrent-overvoltage protecting circuit (120), overcurrent-overvoltage protecting circuit (120) includes first diode
(1201), the cathode of first diode (1201) connects with the anode of electric resistance partial pressure module (11), light emitting diode (131) respectively
It connects, the anode of first diode (1201) is connect with the cathode of light emitting diode (131).
3. according to claim 1 or 2 be based on short-circuit test overvoltage photoelectric insulating protection device, it is characterised in that：It crosses
Flowing through voltage protection circuit (120) further includes the first current-limiting resistance for limiting the size of current for flowing into light emitting diode (131)
(1204), the first current-limiting resistance (1204) is connected in series in cathode and light emitting diode (131) of first diode (1201)
Between anode.
4. according to claim 3 be based on short-circuit test overvoltage photoelectric insulating protection device, it is characterised in that：It crosses and flows through
Voltage protection circuit (120) further includes the over-current over-voltage protection electricity for limiting the size of current for flowing through first diode (1201)
Resistance, the anode series connection of over-current over-voltage protection resistance and first diode (1201).
5. according to claim 2 or 4 be based on short-circuit test overvoltage photoelectric insulating protection device, it is characterised in that：It crosses
Flow through pressure protective resistance include with the anode of first diode (1201) be connected in series and adjustable resistor (1202) size can
Resistance (1202) and adjustable resistor (1202) concatenated second current-limiting resistance (1203) are adjusted, adjustable resistor is passed through
(1202) size of current for flowing through first diode (1201) is adjusted with the series connection of the second current-limiting resistance (1203), thus
The size of current of first diode (1201) is flowed through in limitation.
6. according to claim 5 be based on short-circuit test overvoltage photoelectric insulating protection device, it is characterised in that：Further include
For carrying out the reverse protection module of overcurrent protection to the photosensitive semiconductor pipe (132) being encapsulated in photoisolator (13)
(14), reverse protection module (14) is connect with photosensitive semiconductor pipe (132)；Reverse protection module (14) is equipped with reverse protection circuit
(140), reverse protection circuit (140) includes the size of current for limiting the emitter for flowing through photosensitive semiconductor pipe (132)
Third current-limiting resistance (1403), third current-limiting resistance (1403) are connect with the emitter of photosensitive semiconductor pipe (132).
7. according to claim 6 be based on short-circuit test overvoltage photoelectric insulating protection device, it is characterised in that：It is reversed to protect
Protection circuit (140) further includes the second diode (1401), the both ends of the second diode (1401) respectively with photosensitive semiconductor pipe
(132) collector and third current-limiting resistance (1403) connection.
8. according to claim 6 or 7 be based on short-circuit test overvoltage photoelectric insulating protection device, it is characterised in that：Instead
To the 4th current-limiting resistance that protection circuit (140) further includes for limiting the size of current for flowing through the second diode (1401)
(1402), the 4th current-limiting resistance (1402) is connected in series between the second diode (1401) and third current-limiting resistance (1403).
9. according to claim 8 be based on short-circuit test overvoltage photoelectric insulating protection device, it is characterised in that：Resistance point
Die block (11) is equipped with resistor voltage divider circuit (110), and resistor voltage divider circuit (110) includes for the port to sample (2)
The partial pressure that voltage carries out the sample resistance (1101) of voltage sampling, the voltage for being taken to sample resistance (1101) is divided
Resistance (1102), sample resistance (1101) are connected with divider resistance (1102), the both ends of divider resistance (1102) respectively with shine
The anode and cathode of diode (131) connects, and the first current-limiting resistance (1204) is connected in series in divider resistance (1102) and shines
Between the anode of diode (131).
10. based on short-circuit test overvoltage photoelectric insulating protection device described according to claim 1 or 2 or 4 or 6 or 7 or 9,
It is characterized in that：It further include the current regulating module (3) being connected on the port of sample (2), voltage regulator module
(4), current regulating module (3) includes the prime impedance (31) and rear class impedance for adjusting the electric current for flowing through sample (2)
(33), connect with prime impedance (31) and be used to adjust the prime inductance (32) and rear class of the time constant of prime impedance (31)
Impedance (33) is connected and the rear class inductance (34) of the time constant for adjusting rear class impedance (33), prime impedance (31), prime
Inductance (32), rear class impedance (33), rear class inductance (34) are both connected on the port of sample (2)；Voltage regulator module (4)
Including the varistor (40) limited for the port voltage of the input terminal to sample (2), varistor (40) is even
It connects on the port of sample (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810743732.8A CN108872672A (en) | 2018-07-09 | 2018-07-09 | Based on short-circuit test overvoltage photoelectric insulating protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810743732.8A CN108872672A (en) | 2018-07-09 | 2018-07-09 | Based on short-circuit test overvoltage photoelectric insulating protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108872672A true CN108872672A (en) | 2018-11-23 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2630869A1 (en) * | 1988-04-28 | 1989-11-03 | Telemecanique Electrique | Device for isolated transmission of a signal by optocoupler |
| CN102522889A (en) * | 2011-12-12 | 2012-06-27 | 西安福安创意咨询有限责任公司 | Design method of passive linear photoelectric isolation conversion circuit |
| CN102739235A (en) * | 2012-07-11 | 2012-10-17 | 南车株洲电力机车研究所有限公司 | Switching value acquisition insulating circuit |
| CN202712814U (en) * | 2012-05-16 | 2013-01-30 | 洛阳隆盛科技有限责任公司 | Shutdown output over-voltage and under-voltage protection circuit |
| CN103199917A (en) * | 2013-03-19 | 2013-07-10 | 启东文鑫电子有限公司 | Optoelectronic isolator |
| CN208421045U (en) * | 2018-07-09 | 2019-01-22 | 中检质技检验检测科学研究院有限公司 | Based on short-circuit test overvoltage photoelectric insulating protection device |
| AU2019100844A4 (en) * | 2019-07-31 | 2019-09-05 | Zhongjian Quality Test And Certification Research Intitute Co., Ltd | An overvoltage optoelectronic isolation protection device based on short circuit test |
-
2018
- 2018-07-09 CN CN201810743732.8A patent/CN108872672A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2630869A1 (en) * | 1988-04-28 | 1989-11-03 | Telemecanique Electrique | Device for isolated transmission of a signal by optocoupler |
| CN102522889A (en) * | 2011-12-12 | 2012-06-27 | 西安福安创意咨询有限责任公司 | Design method of passive linear photoelectric isolation conversion circuit |
| CN202712814U (en) * | 2012-05-16 | 2013-01-30 | 洛阳隆盛科技有限责任公司 | Shutdown output over-voltage and under-voltage protection circuit |
| CN102739235A (en) * | 2012-07-11 | 2012-10-17 | 南车株洲电力机车研究所有限公司 | Switching value acquisition insulating circuit |
| CN103199917A (en) * | 2013-03-19 | 2013-07-10 | 启东文鑫电子有限公司 | Optoelectronic isolator |
| CN208421045U (en) * | 2018-07-09 | 2019-01-22 | 中检质技检验检测科学研究院有限公司 | Based on short-circuit test overvoltage photoelectric insulating protection device |
| AU2019100844A4 (en) * | 2019-07-31 | 2019-09-05 | Zhongjian Quality Test And Certification Research Intitute Co., Ltd | An overvoltage optoelectronic isolation protection device based on short circuit test |
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