CN109088390A - A kind of power input filter protective circuit - Google Patents
A kind of power input filter protective circuit Download PDFInfo
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- CN109088390A CN109088390A CN201811012429.7A CN201811012429A CN109088390A CN 109088390 A CN109088390 A CN 109088390A CN 201811012429 A CN201811012429 A CN 201811012429A CN 109088390 A CN109088390 A CN 109088390A
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- Prior art keywords
- circuit
- filter
- common mode
- mode inductance
- power input
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
- H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
- H02H7/125—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for rectifiers
-
- 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
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Filters And Equalizers (AREA)
Abstract
The invention discloses a kind of power input filter protective circuits; including power input connectors; power input connectors are connect with filter circuit; and safety element is serially connected on the firewire of power input connectors; filter circuit is connected with protection circuit, and filter circuit and the protection circuit are connect with rectifier bridge respectively.Safety element is self-recovery fuse, and when the overcurrent overheat failure of circuit is excluded, self-recovery fuse can recover to low resistance state automatically, and no replacement is required, easy to use, is capable of the safety of protection power source system.Circuit element is all made of surface mount elements, has the advantages that small in size, at low cost.
Description
Technical field
The present invention relates to a kind of power-supply system more particularly to a kind of power input filter protective circuits.
Background technique
Compared with conventional power source system, Military Power system requires security performance higher.The safety of power-supply system, gently then
Influence the realization of single machine function, it is heavy then to influence machine system safe.For the particular/special requirement of Military Power, need external to power supply
Input filter protects power supply using external discrete component composition filter protective circuit, and other equipment are not interfered in guarantee
And do not interfered by other equipment, to ensure that complete machine functional performance is realized.
In the process of the prior art, at least there are the following problems for discovery:
Once existing power supply protects the conducting of circuit anti-surge circuit, high current easily fuse wire causes power supply to lose
Effect.And must be replaced after blown fuse, maintenance is inconvenient.
Summary of the invention
The object of the present invention is to provide a kind of power input filter protective circuits.
The purpose of the present invention is what is be achieved through the following technical solutions:
Power input filter protective circuit of the invention, including power input connectors, the power input connectors with
Filter circuit connection, and safety element is serially connected on the firewire of the power input connectors, the filter circuit is connected with guarantor
Protection circuit, the filter circuit and the protection circuit are connect with rectifier bridge respectively；
The power input connectors are to connect input power；
The safety element is self-recovery fuse, and be used for: when short circuit, the safety element self-heating enters high resistant
State, to inhibit electric current；After short trouble excludes, the safety element is restored to low resistive state automatically；
The filter circuit is to filtering common mode noise and differential mode noise；
The protection circuit is to absorb surge；
The rectifier bridge is converted to direct current to the alternating current for exporting the filter circuit.
As seen from the above technical solution provided by the invention, power input filtering protection provided in an embodiment of the present invention
Circuit, circuit use self-recovery fuse, and when the overcurrent overheat failure of circuit is excluded, self-recovery fuse can restore automatically
To low resistance state, no replacement is required, easy to use, is capable of the safety of protection power source system.Solves fuse in the prior art
It easily fuses in surge, and safeguards inconvenient problem after blown fuse.
Detailed description of the invention
Fig. 1 is power input filter protective circuit schematic diagram provided in an embodiment of the present invention.
Specific embodiment
The embodiment of the present invention will be described in further detail below.What is be not described in detail in the embodiment of the present invention is interior
Appearance belongs to the prior art well known to professional and technical personnel in the field.
Power input filter protective circuit of the invention, preferable specific embodiment is:
Including power input connectors, the power input connectors are connect with filter circuit, and the power input connects
It connects and is serially connected with safety element on the firewire of device, the filter circuit is connected with protection circuit, the filter circuit and the protection
Circuit is connect with rectifier bridge respectively；
The power input connectors are to connect input power；
The safety element is self-recovery fuse, and be used for: when short circuit, the safety element self-heating enters high resistant
State, to inhibit electric current；After short trouble excludes, the safety element is restored to low resistive state automatically；
The filter circuit is to filtering common mode noise and differential mode noise；
The protection circuit is to absorb surge；
The rectifier bridge is converted to direct current to the alternating current for exporting the filter circuit.
The filter circuit includes two-stage differential mode filter circuit and two-stage common mode filtering electricity in one of the embodiments,
Road, i.e. first order differential mode filter circuit, second level differential mode filter circuit, first order common mode filtering circuit, second level common mode filtering
Circuit.
The first order differential mode filter circuit includes: the first filter capacitor in one of the embodiments, first filter
The first end of wave capacitor connects firewire and the safety element simultaneously, and the second end of first filter capacitor connects zero curve；Altogether
Mould inductance, for the common mode inductance tool there are two four ports of coil, first end is located at the both ends of same coil, third with second end
End is located at the both ends of same coil with the 4th end, and the first end of the common mode inductance connects the first end of the first capacitor, institute
The third end for stating common mode inductance connects the second end of first filter capacitor.
The second level differential mode filter circuit includes: the second filter capacitor in one of the embodiments, second filter
The first end of wave capacitor connects the second end of firewire and the common mode inductance, the second end of second filter capacitor simultaneously
The 4th end of zero curve and the common mode inductance is connected simultaneously；First differential mode inductance, the first end connection of first differential mode inductance
The first end of second capacitor；Second differential mode inductance, the first end of second differential mode inductance connect second capacitor
Second end.
The differential mode filter circuit includes: two groups of protection components in one of the embodiments, to control filter
Quality factor；The first end of first group of protection component connects the first end of firewire and the common mode inductance simultaneously, and described the
The second end of one group of protection component connects the second end of the common mode inductance, and the first end of second group of protection component connects simultaneously
The third end of zero curve and the common mode inductance is connect, the second end of second group of protection component connects the 4th of the common mode inductance
End.
The first order common mode filtering circuit includes: common mode inductance in one of the embodiments,；Third filter capacitor,
The first end of the third filter capacitor connects the second end of the common mode inductance, the second termination of the third filter capacitor
Ground；4th filter capacitor, the first end of the 4th filter capacitor connect the 4th end of the common mode inductance, the 4th filtering
The second end of capacitor is grounded.
The second level common mode filtering circuit includes: the first differential mode inductance, the second differential mode electricity in one of the embodiments,
Sense；The first end of 5th filter capacitor, the 5th filter capacitor connects the second end of first differential mode inductance；First protection
Resistance, the first end of first protective resistance connect the second end of the 5th filter capacitor, first protective resistance
Second end ground connection；The first end of 6th filter capacitor, the 6th filter capacitor connects the second end of second differential mode inductance；
Second protective resistance, the first end of second protective resistance connect the second end of the 6th filter capacitor, and described second protects
Protect the second end ground connection of resistance.
The protection circuit includes: the first protection branch and protects branch with described first in one of the embodiments,
Second protection branch in parallel；It is described first protection branch include the first discharge tube and with first discharge tube concatenated first
Varistor, the first discharge tube first end are connected to the second end of the common mode inductance, and the second of first discharge tube
End is connected to the first end of first varistor, and the second end of first varistor is connected to the common mode inductance
4th end；It is described second protection branch include the second discharge tube and with concatenated second varistor of second discharge tube, institute
The second end that the second discharge tube first end is connected to first differential mode inductance is stated, the second end of second discharge tube is connected to
The first end of second varistor, the second end of second varistor are connected to the second of second differential mode inductance
End.
The circuit element for forming the filter circuit, protection circuit and rectifier bridge in one of the embodiments, is patch
Piece element.
The application has the following beneficial effects:
The safety element that above-mentioned power filter protection circuit uses can recover to low-resistance shape after fault exclusion automatically
It is inconvenient to avoid replacement fuse bring for state.
Circuit element of the above-mentioned power filter protection circuit in addition to self-recovery fuse is all made of surface mount elements, has volume
Advantage small, at low cost.
Specific embodiment, as shown in Figure 1:
In order to make the objectives, technical solutions, and advantages of the present invention clearer, by the following examples, it and combines attached
Figure, is further elaborated inductive ballast circuit of the invention.It should be appreciated that specific embodiment described herein
Only to explain the present invention, it is not intended to limit the present invention.
It should be noted that it can be directly to separately when an element is considered as " connection " another element
One element may be simultaneously present centering elements.On the contrary, not deposited when element is connect referred to as " direct " with another element
In intermediary element.
One embodiment of the application provides a kind of power filter protection circuit, and circuit uses self-recovery fuse, works as electricity
The overcurrent overheat failure on road is excluded, and self-recovery fuse can recover to low resistance state automatically, and no replacement is required, easy to use, energy
The safety of enough protection power source systems.
A kind of power filter protection circuit, comprising: power input connectors, to connect input power.It is serially connected with power supply
Insurance device on the firewire of input connector, to provide overcurrent protection for power supply.The filtered electrical being connected with insurance device
Road, to filtering common mode noise and differential mode noise.The protection circuit being connect with filter circuit, to absorb surge protection power supply.
The rectifier bridge being connected with protection circuit, filtered alternating current is converted to direct current.
Power input connectors are a kind of devices for allowing electric power that can realize flowing in circuit.Power input connectors are logical
It crosses and is connected on main power source to obtain electric current.In one embodiment of the application, main power source is 220V alternating current.
In one embodiment of the application, there are four ports for power input connectors J1 tool.Wherein, first port and second port point
Not Lian Jie firewire and zero curve, third port and the 4th port ground connection.
In the another embodiment of the application, the input terminal of power input connectors can access High frequency filter element to filter
Except hyperfrequency noise.The application selects high frequency magnetic bead as filter element.Magnetic bead is the coil of single turn, i.e. single turn inductors.Therefore
Inductance is small, high thus relatively good to the inhibiting effect of high frequency with the resonant frequency of its parasitic capacitance.In the application, by two
Magnetic bead FB1, FB2 are connect respectively on two input ports of power input connectors.Wherein the first end of FB1 is connected to power input
On the port of connector firewire, the first end of FB2 is connected on the port of power input connectors zero curve.
Insuring device is protection element most basic in electronic circuit, and in power supply, insurance device is connect in input circuit
Front end.Its effect is exactly to cut off AC power source in time when input current has been more than to insure the rated current of device, prevent event
Hinder further expansion.
In one embodiment of the application, the insurance device used is self-recovery fuse F1.Self-recovery fuse F1
It is the polymer resin by specially treated and the conducting particles composition for being distributed in the inside.Polymer resin is closely under normal operation
Conducting particles is strapped in outside crystalloid structure, chain conduction electric pathway is constituted, self-recovery fuse F1 at this time is low-resistance
State, it is small to flow through thermal energy caused by the electric current of self-recovery fuse on route, will not change crystal structure.When route generation is short
When road or overload, the heat for flowing through the high current generation of self-recovery fuse F1 melts polymer resin, and volume increases rapidly, shape
At high-impedance state, operating current is reduced rapidly, to be limited circuit and be protected.When the overcurrent and overheating fault of circuit are arranged
After removing, self-recovery fuse F1 recovers to low resistance state automatically.Both maintenance replacement is avoided, also avoids may cause circuit damage
Persistent loop open and-shut mode.Specifically, it is defeated that self-recovery fuse F1 is serially connected in power supply in embodiment provided by the present application
Enter on the firewire at end.Its first end connects the second end of magnetic bead FB1, and second end is connected with filter circuit.
Since noise can impact device, leads to circuit operation irregularity, reduce the service life of device.Therefore it needs
Power grid between equipment add filter circuit to filter out noise.One embodiment of the application provides a kind of filter circuit, can
Filtering common mode noise and differential mode noise.
Specifically, the filter circuit includes two-stage differential mode filter circuit and two-stage common mode filtering circuit, i.e. first order differential mode
Filter circuit, second level differential mode filter circuit, first order common mode filtering circuit and second level common mode filtering circuit.
First order differential mode filter circuit is made of the first filter capacitor C1 and common mode inductance L1.First filter capacitor C1 connection
Between zero curve and firewire.The first end of first filter capacitor C1 connects the second end of self-recovery fuse F1, common mode electricity simultaneously
Feel the first end and firewire of L1, the second end of the first filter capacitor C1 connects the second end of magnetic bead FB2, common mode inductance L1 simultaneously
Third end and zero curve.First order differential mode filter circuit further includes common mode inductance L1.Common mode inductance L1 is wound on same by two windings
It is formed on iron core, there are four ports altogether.Wherein, first port 1 and second port 2 are on same coil, third port 3 and the 4th
Port 4 is on same coil.Since common mode inductance L1 is there are two winding, there is gap between the two windings, therefore can cause to leak
Sense, this leakage inductance is differential mode inductance.When differential-mode current is flowed through, differential mode noise can be filtered out.
Second level differential mode filter circuit is by the second filter capacitor C2 and the first differential mode inductance L2, the second differential mode inductance L3 group
At.Second filter capacitor C2 is connected between zero curve and firewire.It is poor that the first end of second filter capacitor C2 connects first simultaneously
The first end and firewire of mould inductance L2, the second end of the second filter capacitor C2 connect simultaneously the second differential mode inductance L3 first end and
Zero curve.Differential mode inductors L2, L3 and the circuit in series filter capacitor C2.Since the characteristic of inductance is that logical low frequency hinders high frequency, electricity
The characteristic of appearance is logical high frequency, resistance low frequency.Differential mode inductance L2, L3 are big to the induction reactance of differential mode High-frequency Interference, and filter capacitor C2 is X electricity
Hold, it is small to the capacitive reactance of differential mode High-frequency Interference, therefore can be with the high frequency differential mode noise in filtering circuit.
More specifically, the first filter capacitor C1 and the second filter capacitor C2 is safety capacitor, and is all X2 capacitor.X2 electricity
Appearance can inhibit powered electromagnetic to interfere, high pressure resistant for eliminating differential mode noise.The first filter capacitor C1 in the present embodiment and
The capacity of two filter capacitor C2 is 0.01uF.
Two-stage differential mode filter circuit further includes protection component, for controlling the quality factor of filter, i.e. Q value, while can
There is spike to avoid frequency response.Specifically, protection component employed in the present embodiment is two groups of resistance.First group of resistance
Comprising tri- resistance of R1, R2, R3, a winding both ends of common mode inductance F1 are then parallelly connected with after three resistance series connection.Second group of electricity
Resistance includes tri- resistance of R4, R5, R6, and another winding both ends of common mode inductance F1 are then parallelly connected with after three resistance series connection.Six
The resistance value of resistance is identical, is 10k Ω, model R0805.
Due to the influence of external magnetic field, induced voltage can be generated on conducting wire, and then generate electric current.On the other hand, due to leading
There is potential difference between line and ground wire, common mode current can be generated on conducting wire.If equipment generates common mode current, cable on device cable
Strong electromagnetic radiation can be generated, causes equipment not to be able to satisfy the limitation requirement in electromagnetic compatibility standard to radiation-emitting, also can
Interference is generated to other equipment.Therefore need to eliminate the interference that common mode current generates in circuit.
One embodiment of the application provides two-stage common mode filtering circuit, including first order common mode filtering circuit and the second level
Common mode filtering circuit.
First order common mode filtering circuit includes common mode inductance L1, third capacitor C3, the 4th capacitor C4.The of third capacitor C3
One end connects the second end of common mode inductance L1, the second end ground connection of third capacitor C3.The first end of 4th capacitor C4 connects common mode
The 4th end of inductance L1, the second end ground connection of the 4th capacitor C4.
After first order common mode filtering circuit filters out most of common mode interference, second level common mode filtering circuit filters out remainder
It interferes part.When common mode current flows through second level common mode filtering circuit, the magnetic flux in differential mode inductance increases, and then can press down
Common mode current processed, filtering common mode interference.Protective resistance R7, R8 is used to control the Q value of filter, and frequency response is avoided point occur
Peak.
More specifically, the 5th capacitor C5, the 6th capacitor C6 are safety capacitor, and are all Y capacitance, capacity 5.7nF, type
Number be C1812.First differential mode inductance L2, the second differential mode inductance L3 inductance be 1000uH.The resistance value of protective resistance R7, R8
It is 120 Ω.
Under conditions of electrical technology index meets the requirements, in order to pacify power supply in adverse circumstances and catastrophic failure
It reliably works entirely, multi-level protection circuit need to be designed.In one embodiment of the application, wave is absorbed using dual-electrode protecting circuit
It gushes and thunder and lightning.Wherein, first order protection circuit includes the first discharge tube GD2 and the first varistor RV1.
Specifically, the first discharge tube GD2 first end is connected to the second end of common mode inductance L1.The of first discharge tube GD2
Two ends are connected to the first end of the first varistor RV1.The second end of first varistor RV1 is connected to the of common mode inductance L1
Four ends.
Since there is varistor biggish parasitic capacitance can generate current leakage when alternating current flows through.And it uses
After a period of time, parasitic capacitance becomes larger, and Leakage Current is caused to become larger, and then leads to varistor fever self-destruction.Therefore use electric discharge
Pipe is connected with varistor.Discharge tube has lesser parasitic capacitance, and the total capacitance of series arm can be made to be reduced to several pico farads,
And then reduce leakage current.In embodiments herein, the first discharge tube GD2 is gas-discharge tube.First discharge tube GD2 can
As switch, when no transient voltage, first gas discharge tube is short-circuit condition, and the first varistor is separated from circuit,
Make varistor almost without leakage current.Make conducting wire there are when surge pulse when encountering lightning stroke, if pulse voltage is lower than pressure-sensitive
The threshold voltage of resistance, varistor are equivalent to the resistance of resistance value infinity, flow through the electric current very little of varistor.Therefore there is wave
When gushing pulse, surge protection circuit is can be absorbed in varistor.
It includes the second discharge tube GD2 and the first varistor RV1 that circuit is protected in the second level.The second discharge tube first end
It is connected to the second end of first differential mode inductance, the second end of second discharge tube is connected to second varistor
First end, the second end of second varistor are connected to the second end of second differential mode inductance.
The second level protects the working principle of branch to protect branch with the first order, and details are not described herein.
Patch rectifier bridge D13 is connected to filter circuit and protects the output end of circuit, to turn filtered alternating current
It is changed to direct current, and direct current is conveyed to electrical appliance.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope of the present disclosure, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (9)
1. a kind of power input filter protective circuit, which is characterized in that including power input connectors, the power input connection
Device is connect with filter circuit, and safety element is serially connected on the firewire of the power input connectors, the filter circuit connection
There is protection circuit, the filter circuit and the protection circuit are connect with rectifier bridge respectively；
The power input connectors are to connect input power；
The safety element is self-recovery fuse, and be used for: when short circuit, the safety element self-heating enters high resistant shape
State, to inhibit electric current；After short trouble excludes, the safety element is restored to low resistive state automatically；
The filter circuit is to filtering common mode noise and differential mode noise；
The protection circuit is to absorb surge；
The rectifier bridge is converted to direct current to the alternating current for exporting the filter circuit.
2. power input filter protective circuit according to claim 1, which is characterized in that the filter circuit includes two-stage
Differential mode filter circuit and two-stage common mode filtering circuit, i.e. first order differential mode filter circuit, second level differential mode filter circuit, the first order
Common mode filtering circuit, second level common mode filtering circuit.
3. power input filter protective circuit according to claim 2, which is characterized in that the first order differential mode filtered electrical
Road includes: the first filter capacitor, and the first end of first filter capacitor connects firewire and the safety element simultaneously, and described the
The second end of one filter capacitor connects zero curve；Common mode inductance, common mode inductance tool there are two four ports of coil, first end with
Second end is located at the both ends of same coil, and third end and the 4th end are located at the both ends of same coil, and the first of the common mode inductance
End connects the first end of the first capacitor, and the third end of the common mode inductance connects the second end of first filter capacitor.
4. power input filter protective circuit according to claim 2, which is characterized in that the second level differential mode filtered electrical
Road includes: the second filter capacitor, and the first end of second filter capacitor connects the of firewire and the common mode inductance simultaneously
Two ends, the second end of second filter capacitor connect the 4th end of zero curve and the common mode inductance simultaneously；First differential mode electricity
Sense, the first end of first differential mode inductance connect the first end of second capacitor；Second differential mode inductance, second differential mode
The first end of inductance connects the second end of second capacitor.
5. according to power input filter protective circuit described in claim 2,3 or 4, which is characterized in that the differential mode filtered electrical
Road includes: two groups of protection components, to control the quality factor of filter；The first end of first group of protection component connects simultaneously
It starts to exchange fire the first end of line and the common mode inductance, the second end of first group of protection component connects the second of the common mode inductance
End, the first end of second group of protection component connect the third end of zero curve and the common mode inductance, second group of guarantor simultaneously
The second end of protecting assembly connects the 4th end of the common mode inductance.
6. power input filter protective circuit according to claim 2, which is characterized in that the first order common mode filtering electricity
Road includes: common mode inductance；The first end of third filter capacitor, the third filter capacitor connects the second of the common mode inductance
End, the second end ground connection of the third filter capacitor；4th filter capacitor, the 4th filter capacitor first end connection described in
4th end of common mode inductance, the second end ground connection of the 4th filter capacitor.
7. power input filter protective circuit according to claim 2, which is characterized in that the second level common mode filtering electricity
Road includes: the first differential mode inductance, the second differential mode inductance；The first end of 5th filter capacitor, the 5th filter capacitor connects institute
State the second end of the first differential mode inductance；First protective resistance, the first end connection of first protective resistance the 5th filtering
The second end of capacitor, the second end ground connection of first protective resistance；6th filter capacitor, the first of the 6th filter capacitor
End connects the second end of second differential mode inductance；Second protective resistance, second protective resistance first end connection described in
The second end of 6th filter capacitor, the second end ground connection of second protective resistance.
8. power input filter protective circuit according to claim 1, which is characterized in that the protection circuit includes:
One protection branch and the second protection branch for protecting branch circuit parallel connection with described first；The first protection branch includes the first electric discharge
Pipe and with concatenated first varistor of first discharge tube, the first discharge tube first end is connected to the common mode inductance
Second end, the second end of first discharge tube is connected to the first end of first varistor, the first pressure-sensitive electricity
The second end of resistance is connected to the 4th end of the common mode inductance；The second protection branch includes the second discharge tube and with described the
Concatenated second varistor of two discharge tubes, the second discharge tube first end are connected to the second of first differential mode inductance
End, the second end of second discharge tube are connected to the first end of second varistor, and the of second varistor
Two ends are connected to the second end of second differential mode inductance.
9. power input filter protective circuit according to claim 1, which is characterized in that form the filter circuit, guarantor
The circuit element of protection circuit and rectifier bridge is surface mount elements.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811012429.7A CN109088390A (en) | 2018-08-31 | 2018-08-31 | A kind of power input filter protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811012429.7A CN109088390A (en) | 2018-08-31 | 2018-08-31 | A kind of power input filter protective circuit |
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| Publication Number | Publication Date |
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| CN109088390A true CN109088390A (en) | 2018-12-25 |
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| CN201811012429.7A Pending CN109088390A (en) | 2018-08-31 | 2018-08-31 | A kind of power input filter protective circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112953730A (en) * | 2021-01-26 | 2021-06-11 | 上海柏楚数控科技有限公司 | Power supply and communication integrated transmission system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979273A (en) * | 2017-12-26 | 2018-05-01 | 苏州科可瑞尔航空技术有限公司 | Power filter protects circuit |
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2018
- 2018-08-31 CN CN201811012429.7A patent/CN109088390A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107979273A (en) * | 2017-12-26 | 2018-05-01 | 苏州科可瑞尔航空技术有限公司 | Power filter protects circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112953730A (en) * | 2021-01-26 | 2021-06-11 | 上海柏楚数控科技有限公司 | Power supply and communication integrated transmission system |
| CN112953730B (en) * | 2021-01-26 | 2022-12-13 | 上海柏楚数控科技有限公司 | Power supply and communication integrated transmission system |
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Application publication date: 20181225 |