CN206471820U - A kind of mobile unit delay surge protection circuit - Google Patents
A kind of mobile unit delay surge protection circuit Download PDFInfo
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- CN206471820U CN206471820U CN201720075541.XU CN201720075541U CN206471820U CN 206471820 U CN206471820 U CN 206471820U CN 201720075541 U CN201720075541 U CN 201720075541U CN 206471820 U CN206471820 U CN 206471820U
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Abstract
The utility model is related to circuit design field, more particularly to a kind of mobile unit delay surge protection circuit, including：Power input protection circuit, mu balanced circuit, power-up time delay circuit, overvoltage crowbar and the on-off circuit being sequentially connected electrically；The output end of the on-off circuit is electrically connected with mobile unit.Vehicle first carries out delayed protection processing when lighting a fire and starting, and delay time is not changed by the size of input power, effectively prevent the unstable of power supply in ignition process and causes equipment to be frequently in the state of break-make and bring adverse effect.Mobile unit normally starts after work, and control circuit is fed back to by the power supply of mobile unit rear class, simultaneously close off by resistance and regulator tube group into mu balanced circuit, reduce power attenuation.When there is the surge voltage as caused by throw load etc., by metal-oxide-semiconductor switch closing processing, after waiting power up normal, equipment is restarted, the security of mobile unit is effectively protected.
Description
Technical field
The utility model is related to circuit design field, more particularly to a kind of mobile unit delay surge protection circuit.
Background technology
Automobile is in retrofire, the rapid drawdown for starting battery tension caused by meeting when motor circuit is powered of internal combustion engine,
Be often below the normal working voltage scope of mobile unit, light a fire sometimes it is unsuccessful need to light a fire again, the voltage instability of output
Mobile unit is caused to be in repeatedly the process of break-make, it is totally unfavorable to equipment.After lighting a fire successfully, battery breaks with starting motor
Throw load phenomenon occurs in the moment opened, and the several times that surge voltage is automobile supply voltage itself is produced, far beyond mobile unit
Operating voltage range.But mobile unit is inevitably in this complicated voltage environment again, this requires equipment
Itself there is jamproof ability.
The Chinese patent document of Application No. 200810071906.7 discloses a kind of anti-surge device of on-vehicle power supply, and it is led
If the device is related to a kind of dc source auxiliary device, its N-channel MOS pipe D ends connection automobile power source, S ends are carried to load
For driving voltage, start-up circuit is set between the D ends and G ends of metal-oxide-semiconductor, is G when automobile power source is initially provided of input power
End provides initial boost voltage and starts the equipment；Clamp circuit is set between metal-oxide-semiconductor G ends and ground wire, the power supply at D ends is higher than pincers
Position voltage and during less than shut-off voltage the output of control S ends be slightly below clamp voltage；Over-pressed guarantor is set between metal-oxide-semiconductor D ends and ground wire
Protection circuit, its output end connects metal-oxide-semiconductor G ends, controls metal-oxide-semiconductor cut-out S ends output when D terminal voltages are higher than shut-off voltage,
Solve the problem of lasting high surge voltage of resistance impacts.
But above-mentioned solution has the disadvantage that：Switch, when there is surge, MOS are used as by the use of N-channel MOS
The voltage over the ground at the S ends of pipe is 31V, when input voltage beyond 62V is, in order to disconnect MOS switch pipe, G ends to be passed through into one
Triode moves ground to, now VGSVoltage be -31V, beyond the specification (± 20V) of metal-oxide-semiconductor, easily cause metal-oxide-semiconductor to puncture
And damage, hidden danger is brought to equipment safety, while when automobile just starts, appropriate conducting delay is not carried out, to equipment
Some can be brought to damage.
Utility model content
Technical problem to be solved in the utility model is：A kind of mobile unit protected and handled with delayed is provided
Be delayed surge protection circuit, is prevented effectively from that the power supply during vehicle ignition is unstable to cause the mobile unit frequently in break-make
State.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：
A kind of mobile unit delay surge protection circuit, including：The power input protection circuit that is sequentially connected electrically, voltage stabilizing electricity
Road, power-up time delay circuit, overvoltage crowbar and on-off circuit；The input of the power input protection circuit is electrically connected with power supply
Connect, the output end of the on-off circuit is electrically connected with mobile unit；
The power input protection circuit includes two-way suppression diode and the first diode；
The mu balanced circuit includes first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th electricity
Resistance, the 7th resistance, the first voltage-stabiliser tube, the second voltage-stabiliser tube, the second diode, the 3rd diode, the first triode, the second triode
With the first electric capacity；
The power-up time delay circuit includes the 8th resistance, the 9th resistance, the tenth resistance, the second electric capacity and the first operation amplifier
Device；First operational amplifier includes the first positive input, the first reverse input end, the first power end, the first earth terminal and the
One output end；The first earth terminal ground connection；
The overvoltage crowbar includes the 11st resistance, the 12nd resistance, the 13rd resistance, the 14th resistance and second
Operational amplifier；Second operational amplifier connects including the second positive input, the second reverse input end, second source end, second
Ground terminal and the second output end；The second earth terminal ground connection；
The on-off circuit includes the 15th resistance, the 16th resistance, the 17th resistance, the 18th resistance, the three or three pole
Pipe, the 3rd voltage-stabiliser tube and FET；
One end of the two-way suppression diode and the positive pole of the first diode are electrically connected with the positive pole of power supply respectively, two-way
Suppress the other end ground connection of diode；
The negative pole of first diode one end respectively with first resistor, one end of second resistance, the one of the 6th resistance
End, one end of the 13rd resistance, one end of the 17th resistance, the source electrode electrical connection of the negative pole of the 3rd voltage-stabiliser tube and FET；
The other end of the first resistor passes through the first voltage-stabiliser tube one end respectively with 3rd resistor, one end of the 4th resistance
Electrically connected with the base stage of the first triode；The other end ground connection of 4th resistance, the grounded emitter of the first triode；
The other end of the second resistance is electrically connected with the colelctor electrode of the first triode and one end of the 5th resistance respectively, institute
The other end for stating the 5th resistance is electrically connected with the base stage of the second triode；
The other end of 6th resistance is electrically connected with the colelctor electrode of the second triode；
The emitter stage of second triode is grounded by the second voltage-stabiliser tube, and the emitter stage of the second triode passes through the two or two
Pole pipe respectively with the negative pole of the 3rd diode, one end of the first electric capacity, one end of the 7th resistance and the first power electric connection；
The other end ground connection of first electric capacity, the other end ground connection of the 7th resistance；
One end, one end of the 9th resistance, the first power end of the first operational amplifier and the second fortune of 8th resistance
Calculate amplifier second source end respectively with the first power electric connection；
The other end of 8th resistance passes through the second capacity earth, the other end and the first operational amplifier of the 8th resistance
The first positive input electrical connection；
The other end of 9th resistance passes through the tenth resistance eutral grounding, the other end and the first operational amplifier of the 9th resistance
The first reverse input end electrical connection；
First output end of first operational amplifier passes through the 11st resistance one end respectively with the 12nd resistance,
The second positive input electrical connection of one end of three electric capacity and the second operational amplifier, the other end ground connection of the 12nd resistance, the
The other end ground connection of three electric capacity；
The other end of 13rd resistance passes through the 14th resistance eutral grounding, the other end of the 13rd resistance and the second computing
The second reverse input end electrical connection of amplifier；Second output end of second operational amplifier is distinguished by the 15th resistance
Electrically connected with one end of the 16th resistance and the base stage of the 3rd triode, the other end of the 16th resistance ground connection, described the
The grounded emitter of three triodes；
By the after the grid electrical connection of the other end of 17th resistance, the positive pole of the 3rd voltage-stabiliser tube and FET
18 resistance are electrically connected with the colelctor electrode of the 3rd triode；
The drain electrode of the FET is electrically connected with mobile unit.
Further, in addition to the 4th diode, the negative pole and the first power electric connection of the 4th diode, described
The positive pole of four diodes is electrically connected with the second positive input of the second operational amplifier.
Further, the resistance value ratio of the 17th resistance and the 18th resistance is 3:1.
The beneficial effects of the utility model are：
Mobile unit delay surge protection circuit of the present utility model is that vehicle first carries out delayed when lighting a fire and starting
Protection is handled, and delay time is not changed by the size of input power, effectively prevent the shakiness of the power supply in ignition process
Surely so that equipment is frequently in the state of break-make and brings adverse effect.Mobile unit normally starts after work, by mobile unit
The power supply of rear class feeds back to control circuit, simultaneously close off by resistance and regulator tube group into mu balanced circuit, reduce power attenuation.
Size to input power is constantly monitored, and when there is the surge voltage as caused by throw load etc., metal-oxide-semiconductor is switched and closed
Processing is closed, after waiting power up normal, equipment is restarted, is effectively protected the security of mobile unit.
Brief description of the drawings
Fig. 1 is the circuit connection diagram of mobile unit of the present utility model delay surge protection circuit.
Embodiment
To describe technology contents of the present utility model, the objects and the effects in detail, below in conjunction with embodiment and match somebody with somebody
Accompanying drawing is closed to be explained.
Fig. 1 is refer to, a kind of mobile unit delay surge protection circuit that the utility model is provided, including：It is electrically connected successively
Power input protection circuit, mu balanced circuit, power-up time delay circuit, overvoltage crowbar and the on-off circuit connect；The power supply is defeated
Enter the input and power electric connection of protection circuit, the output end of the on-off circuit is electrically connected with mobile unit；
The power input protection circuit includes two-way suppression diode D3 and the first diode D1；
The mu balanced circuit includes first resistor R1, second resistance R2,3rd resistor R11, the 4th resistance R13, the 5th electricity
Hinder R6, the 6th resistance R3, the 7th resistance R14, the first voltage-stabiliser tube D4, the second voltage-stabiliser tube D9, the second diode D7, the 3rd diode
D6, the first triode Q3, the second triode Q2 and the first electric capacity C1；
The power-up time delay circuit includes the 8th resistance R7, the 9th resistance R5, the tenth resistance R16, the second electric capacity C2 and the
One operational amplifier U1A；First operational amplifier uses model LMV358 chip, and the first operational amplifier includes the
One positive input (the U1A pin marked as 3 in Fig. 1), the first reverse input end (U1A drawing marked as 2 in Fig. 1
Pin), the first power end (the U1A pin marked as 8 in Fig. 1), the first earth terminal (the U1A pin marked as 4 in Fig. 1) and
First output end (the U1A pin marked as 1 in Fig. 1)；The first earth terminal ground connection；
The overvoltage crowbar includes the 11st resistance R10, the 12nd resistance R17, the 13rd resistance R8, the 14th electricity
Hinder R18 and the second operational amplifier U1B；Second operational amplifier similarly uses model LMV358 chip, second
Operational amplifier includes the second positive input (the U1B pin marked as 5 in Fig. 1), the second reverse input end (U1B in Fig. 1
The pin marked as 6), second source end (the U1B pin marked as 8 in Fig. 1), the second earth terminal (U1B mark in Fig. 1
Number pin for being 4) and the second output end (the U1B pin marked as 7 in Fig. 1)；The second earth terminal ground connection；
The on-off circuit includes the 15th resistance R12, the 16th resistance R19, the 17th resistance R4, the 18th resistance
R9, the 3rd triode Q4, the 3rd voltage-stabiliser tube D2 and FET Q1；
One end of the two-way suppression diode and the positive pole of the first diode are electrically connected with the positive pole of power supply respectively, two-way
Suppress the other end ground connection of diode；
The negative pole of first diode one end respectively with first resistor, one end of second resistance, the one of the 6th resistance
End, one end of the 13rd resistance, one end of the 17th resistance, the source electrode electrical connection of the negative pole of the 3rd voltage-stabiliser tube and FET；
The other end of the first resistor passes through the first voltage-stabiliser tube one end respectively with 3rd resistor, one end of the 4th resistance
Electrically connected with the base stage of the first triode；The other end ground connection of 4th resistance, the grounded emitter of the first triode；
The other end of the second resistance is electrically connected with the colelctor electrode of the first triode and one end of the 5th resistance respectively, institute
The other end for stating the 5th resistance is electrically connected with the base stage of the second triode；
The other end of 6th resistance is electrically connected with the colelctor electrode of the second triode；
The emitter stage of second triode is grounded by the second voltage-stabiliser tube, and the emitter stage of the second triode passes through the two or two
Pole pipe respectively with the negative pole of the 3rd diode, one end of the first electric capacity, one end of the 7th resistance and the first power electric connection；
The other end ground connection of first electric capacity, the other end ground connection of the 7th resistance；
One end, one end of the 9th resistance, the first power end of the first operational amplifier and the second fortune of 8th resistance
Calculate amplifier second source end respectively with the first power electric connection；
The other end of 8th resistance passes through the second capacity earth, the other end and the first operational amplifier of the 8th resistance
The first positive input electrical connection；
The other end of 9th resistance passes through the tenth resistance eutral grounding, the other end and the first operational amplifier of the 9th resistance
The first reverse input end electrical connection；
First output end of first operational amplifier passes through the 11st resistance one end respectively with the 12nd resistance,
The second positive input electrical connection of one end of three electric capacity and the second operational amplifier, the other end ground connection of the 12nd resistance, the
The other end ground connection of three electric capacity；
The other end of 13rd resistance passes through the 14th resistance eutral grounding, the other end of the 13rd resistance and the second computing
The second reverse input end electrical connection of amplifier；Second output end of second operational amplifier is distinguished by the 15th resistance
Electrically connected with one end of the 16th resistance and the base stage of the 3rd triode, the other end of the 16th resistance ground connection, described the
The grounded emitter of three triodes；
By the after the grid electrical connection of the other end of 17th resistance, the positive pole of the 3rd voltage-stabiliser tube and FET
18 resistance are electrically connected with the colelctor electrode of the 3rd triode；
The drain electrode of the FET is electrically connected with mobile unit.
It was found from foregoing description, the beneficial effects of the utility model are：Mobile unit delay surge of the present utility model
Protection circuit is that vehicle first carries out delayed protection processing when lighting a fire and starting, and delay time is not by the size of input power
And change, effectively prevent in ignition process power supply unstable so that equipment frequently the state in break-make and bring unfavorable
Influence.Mobile unit normally starts after work, feeds back to control circuit by the power supply of mobile unit rear class, simultaneously closes off by resistance
With regulator tube group into mu balanced circuit, reduce power attenuation.Size to input power is constantly monitored, once occur by
Caused by throw load etc. during surge voltage, by metal-oxide-semiconductor switch closing processing, after waiting power up normal, equipment is restarted,
It is effectively protected the security of mobile unit.
Further, in addition to the 4th diode D5, the negative pole and the first power electric connection of the 4th diode are described
The positive pole of 4th diode is electrically connected with the second positive input of the second operational amplifier.
Further, the resistance value ratio of the 17th resistance R4 and the 18th resistance R9 is 3:1.
Input protection circuit：Power input parallel connection one TVS pipe D3 to GND, TVS pipe SFI2220SA470 action electricity
Press as 45V, residual voltage is less than 77V.When system is in upper electricity or when working in throw load state and surge voltage occur, TVS pipe D3 is hit
Presentation low impedance path is worn, energy is released quickly against the earth, clamped the voltage within 77V.A specification is connect simultaneously for 100V/
3A diode D1, realizes anti-reverse protection.TVS pipe D3 is placed on diode D1 front ends, is conducive to mitigating the D1 of diode
Burden.
Mu balanced circuit：Input power is in the range of 9V-36V, and just during upper electricity, NPN pipes Q3 base stage is because without drive signal
End, now electric current flows to NPN pipes Q2, Q2 conducting through R2, R6, resistance 1K power resistor R3 and 5.1V voltage-stabiliser tube D9 are formed
Path, constitutes a 5.1V mu balanced circuit, is powered through D7 to control core circuit.A 05V-0.7V left side can be formed in diode
Right pressure drop, the actual operating voltage of control circuit is in 4.5V or so, and C1 realizes that energy storage is filtered, and R14 is electric discharge original paper.When any
When waiting the surge voltage for occurring being more than 43V, D4 conductings, triode Q3 is turned on, and now Q2 ends, and is closed mu balanced circuit, is reached guarantor
Protect power resistor and voltage-stabiliser tube D9 effects.
Power-up time delay circuit：It is core by low-pressure type amplifier LMV358 to control circuit, and supply voltage is after R6 and R16 partial pressures
Input to first order amplifier U1A reverse input end, as the reference comparison voltages of delay circuit, magnitude of voltage is arranged on 3V.R7
Charge circuit is constituted with C2, C2 positive pole is inputted to amplifier U1A positive input.Just during upper electricity, C2 both end voltages are 0V, warp
R7 resistance charges to C2, and only when C2 voltage is more than 3V, amplifier U1A just exports high level, reaches delayed
Function.The charging voltage of the delay strategy is always held at 4.5V or so, and input power size will not change delayed charging
Time, only by setting R7 and C2 value just to change delay time, diode D5 provide repid discharge for discharge loop
Function.
Overvoltage crowbar：After delayed, U1A output high level is filtered, input to the through R10, R17 partial pressure C3
Two grades of amplifier U1B positive input, branch pressure voltage value is arranged on 3V, is used as the reference voltage of overvoltage protection.Surge over voltage
Threshold values is arranged on 60V or so, R8 and R18 and the power supply of input is carried out into partial pressure, is connected to U1B reverse input end.Normal voltage model
In enclosing, the voltage of U1B positive input is higher than reverse input end, amplifier output high level, triode Q4 conductings, P-channel MOS
It is in control drive voltage signal and realizes conducting, to late-class circuit normal power supply.When surge voltage occurs, U1B reverse input
The voltage at end is more than 3V, higher than positive input, now amplifier output low level, and triode Q4 just ends, and P-channel metal-oxide-semiconductor is cut
Only, the function of over-pressed power-off protection is realized.
Control switching circuit：Itself there is power attenuation in the 5.1V voltage-stabilized power supplies that reason R3 and voltage-stabiliser tube D9 are constituted, and with
The rise loss for input voltage also increases therewith, therefore after mobile unit modular power source 5V startups, power supply is fed back into control
Circuit, powers to control circuit.Q3 is turned on, and Q2 just ends, thus have turned off prime regulator tube group into mu balanced circuit.By amplifier
The supply that the control circuit because of composition has rear level power supply continues normal work.When there are being more than 60V surge voltages, R1 and D4 structures
Into path formation drive signal and rear class 5V power supply collective effects, triode Q3 is in the conduction state, and mu balanced circuit, which is in, to close
Closed state, while amplifier U1B exports low level signal, P-channel metal-oxide-semiconductor is turned off, and now controlling circuit, also non-transformer is powered, MOS
Pipe switch is just closed always, realizes the function of overvoltage protection device.After input power recovers normal, Q3 cut-offs, mu balanced circuit
Start, mobile unit also will restarting.
On-off circuit：The pressure-resistant P-channel metal-oxide-semiconductor 12P10 for 100V/9.4A is used, drive circuit is by R4, D2, R9 and Q4
Constitute, R4 and R9 resistance ratio are set to 3:1, it is ensured that in relatively low input voltage, to the driven of metal-oxide-semiconductor.
One 12V voltage-stabiliser tube of R4 two ends parallel connection, when input supply voltage is larger, it is ensured that drive signal voltage is not higher than 12V, reaches guarantor
Protect the effect of metal-oxide-semiconductor.
In summary, a kind of mobile unit delay surge protection circuit that the utility model is provided is that vehicle starts in igniting
When first carry out delayed protection processing, and delay time is not changed by the size of input power, effectively prevent in igniting
During power supply it is unstable cause equipment frequently in break-make state and bring adverse effect.Mobile unit normally starts work
After work, control circuit is fed back to by the power supply of mobile unit rear class, simultaneously close off by resistance and regulator tube group into mu balanced circuit,
Reduce power attenuation.Size to input power is constantly monitored, once there is the surge voltage as caused by throw load etc.
When, by metal-oxide-semiconductor switch closing processing, after waiting power up normal, equipment is restarted, mobile unit is effectively protected
Security.
Embodiment of the present utility model is the foregoing is only, the scope of the claims of the present utility model is not thereby limited, it is every
The equivalents made using the utility model specification and accompanying drawing content, or directly or indirectly it is used in the technology neck of correlation
Domain, is similarly included in scope of patent protection of the present utility model.
Claims (3)
- The surge protection circuit 1. a kind of mobile unit is delayed, it is characterised in that including：The power input protection electricity being sequentially connected electrically Road, mu balanced circuit, power-up time delay circuit, overvoltage crowbar and on-off circuit；The input of the power input protection circuit With power electric connection, the output end of the on-off circuit is electrically connected with mobile unit；The power input protection circuit includes two-way suppression diode and the first diode；The mu balanced circuit includes first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the Seven resistance, the first voltage-stabiliser tube, the second voltage-stabiliser tube, the second diode, the 3rd diode, the first triode, the second triode and One electric capacity；The power-up time delay circuit includes the 8th resistance, the 9th resistance, the tenth resistance, the second electric capacity and the first operational amplifier； It is defeated that first operational amplifier includes the first positive input, the first reverse input end, the first power end, the first earth terminal and first Go out end；The first earth terminal ground connection；The overvoltage crowbar includes the 11st resistance, the 12nd resistance, the 13rd resistance, the 14th resistance and the second computing Amplifier；Second operational amplifier includes the second positive input, the second reverse input end, second source end, the second earth terminal With the second output end；The second earth terminal ground connection；The on-off circuit includes the 15th resistance, the 16th resistance, the 17th resistance, the 18th resistance, the 3rd triode, the Three voltage-stabiliser tubes and FET；One end of the two-way suppression diode and the positive pole of the first diode are electrically connected with the positive pole of power supply respectively, two-way suppression The other end ground connection of diode；The negative pole of first diode one end respectively with first resistor, one end of second resistance, one end of the 6th resistance, One end of 13 resistance, one end of the 17th resistance, the source electrode electrical connection of the negative pole of the 3rd voltage-stabiliser tube and FET；One end, the one end of the 4th resistance and of the other end of the first resistor by the first voltage-stabiliser tube respectively with 3rd resistor The base stage electrical connection of one triode；The other end ground connection of 4th resistance, the grounded emitter of the first triode；The other end of the second resistance is electrically connected with the colelctor electrode of the first triode and one end of the 5th resistance respectively, and described The other end of five resistance is electrically connected with the base stage of the second triode；The other end of 6th resistance is electrically connected with the colelctor electrode of the second triode；The emitter stage of second triode is grounded by the second voltage-stabiliser tube, and the emitter stage of the second triode passes through the second diode Respectively with the negative pole of the 3rd diode, one end of the first electric capacity, one end of the 7th resistance and the first power electric connection；The other end ground connection of first electric capacity, the other end ground connection of the 7th resistance；One end, one end of the 9th resistance, the first power end of the first operational amplifier and the second computing of 8th resistance are put The second source end of big device respectively with the first power electric connection；The other end of 8th resistance passes through the second capacity earth, the other end of the 8th resistance and the of the first operational amplifier One positive input is electrically connected；The other end of 9th resistance passes through the tenth resistance eutral grounding, the other end of the 9th resistance and the of the first operational amplifier One reverse input end is electrically connected；First output end of first operational amplifier passes through the 11st resistance one end respectively with the 12nd resistance, the 3rd electricity The second positive input electrical connection of one end of appearance and the second operational amplifier, the other end ground connection of the 12nd resistance, the 3rd electricity The other end ground connection of appearance；The other end of 13rd resistance passes through the 14th resistance eutral grounding, the other end and the second operation amplifier of the 13rd resistance The second reverse input end electrical connection of device；Second output end of second operational amplifier is by the 15th resistance respectively with The base stage electrical connection of one end of 16 resistance and the 3rd triode, the other end ground connection of the 16th resistance, the described 3rd 3 The grounded emitter of pole pipe；Pass through the 18th after the grid electrical connection of the other end of 17th resistance, the positive pole of the 3rd voltage-stabiliser tube and FET Resistance is electrically connected with the colelctor electrode of the 3rd triode；The drain electrode of the FET is electrically connected with mobile unit.
- The surge protection circuit 2. mobile unit according to claim 1 is delayed, it is characterised in that also including the four or two pole Pipe, the negative pole and the first power electric connection of the 4th diode, the positive pole and the second operational amplifier of the 4th diode The second positive input electrical connection.
- The surge protection circuit 3. mobile unit according to claim 1 is delayed, it is characterised in that the 17th resistance and The resistance value ratio of 18th resistance is 3:1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720075541.XU CN206471820U (en) | 2017-01-20 | 2017-01-20 | A kind of mobile unit delay surge protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720075541.XU CN206471820U (en) | 2017-01-20 | 2017-01-20 | A kind of mobile unit delay surge protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN206471820U true CN206471820U (en) | 2017-09-05 |
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| CN201720075541.XU Active CN206471820U (en) | 2017-01-20 | 2017-01-20 | A kind of mobile unit delay surge protection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109617035A (en) * | 2019-01-03 | 2019-04-12 | 西安神西电气有限责任公司 | A kind of auxiliary actuating apparatus reducing power surge impact |
-
2017
- 2017-01-20 CN CN201720075541.XU patent/CN206471820U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109617035A (en) * | 2019-01-03 | 2019-04-12 | 西安神西电气有限责任公司 | A kind of auxiliary actuating apparatus reducing power surge impact |
| CN109617035B (en) * | 2019-01-03 | 2019-10-18 | 西安神西电气有限责任公司 | A kind of auxiliary actuating apparatus reducing power surge impact |
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