CN208112521U - A kind of lightning protection power source - Google Patents
A kind of lightning protection power source Download PDFInfo
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- CN208112521U CN208112521U CN201820732503.1U CN201820732503U CN208112521U CN 208112521 U CN208112521 U CN 208112521U CN 201820732503 U CN201820732503 U CN 201820732503U CN 208112521 U CN208112521 U CN 208112521U
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Abstract
The utility model relates to power technique fields, disclose a kind of lightning protection power source.Wherein, the lightning protection power source includes current foldback circuit, power frequency isolation transformer, current rectifying and wave filtering circuit, overvoltage crowbar and voltage regulator circuit; the current foldback circuit is connect with the power frequency isolation transformer; the power frequency isolation transformer is connect with the current rectifying and wave filtering circuit; the current rectifying and wave filtering circuit is connect with the overvoltage crowbar, and the overvoltage crowbar is connect with the voltage regulator circuit.In the above manner, the utility model embodiment can effectively realize power lightning protection.
Description
Technical field
The utility model relates to power technique fields, more particularly to a kind of lightning protection power source.
Background technique
With the quickening of social informatization process and industrial automation process, each neck of the microelectronic product in society
Domain is widely used.Many electronic equipments require power supply power supply, and power supply is subject to lightning stroke in thunderstorm weather.
It in industrial automation equipment, instrument, usually requires that and is powered using low-voltage dc power supply, such as 12V or 24V.It is existing
Some low pressure lightning protection power source technologies, mainly by using surge protector (Surge Protective Device, SPD) parallel connection
On power circuit.Fig. 1 is the structural schematic diagram of the lightning protection power source of the prior art.As shown in Figure 1, the lightning protection power source includes SPD
Element and rectifier power source are separately connected the zero curve of rectifier power source by SPD element and then firewire are grounded, carry out lightning protection.
Inventor has found that the SPD in the lightning protection power source of the prior art is to impulse grounding during studying the prior art
Resistance requirement is higher, before the route of SPD must device have the back-up protection of fuse or miniature circuit breaker as SPD；And SPD
After movement, the leakage current flowed through in ground line can generate very strong changing magnetic field in surrounding space, this magnetic field can be certainly
Very high voltage is incuded in dynamicization equipment, so that automation equipment be made to damage, cannot effectively realize power lightning protection.
Utility model content
The utility model embodiment can effectively realize electricity mainly solving the technical problems that provide a kind of lightning protection power source
Source lightning protection.
In order to solve the above technical problems, the technical solution that the utility model embodiment uses is：
A kind of lightning protection power source, including current foldback circuit, power frequency isolation transformer, current rectifying and wave filtering circuit, over-voltage guarantor are provided
Protection circuit and voltage regulator circuit, the current foldback circuit are connect with the power frequency isolation transformer, the power frequency isolation transformer
It is connect with the current rectifying and wave filtering circuit, the current rectifying and wave filtering circuit is connect with the overvoltage crowbar, the overvoltage protection electricity
Road is connect with the voltage regulator circuit.
Wherein, the rated operation point of the power frequency isolation transformer is located at the magnetization curve of the power frequency isolation transformer
It is saturated section.
Wherein, the power frequency isolation transformer includes：Primary side input terminal is connect with the current foldback circuit；Secondary side is defeated
Outlet is connect with the current rectifying and wave filtering circuit, one end ground connection of pair side output end；Transformer core, respectively with the primary side
Input terminal is connected with the secondary side output end, for the primary side input terminal and the secondary side output end to be isolated.
Wherein, the transformer core includes primary coil, secondary coil and magnetic core；The primary coil and the secondary wire
Circle is connect rotating around the magnetic core, the primary coil is set to the primary side input terminal, the secondary coil and the secondary side
Output end connection, the secondary coil receives the electromagnetic field that the primary coil emits by mutual inductance, and is converted to power output.
Wherein, the current foldback circuit includes two resettable fuses, the output of two resettable fuses
End is connect with the both ends of the primary side input terminal respectively.
Wherein, the lightning protection power source further includes input terminal, and the input terminal includes zero line and zero line side, the firewire
End, the zero line side are connect with the input terminal of two resettable fuses respectively.
Wherein, the overvoltage crowbar includes：Transient diode is connected in parallel with the current rectifying and wave filtering circuit；It is two-way
Voltage-stabiliser tube is connected in parallel with the transient diode；The voltage regulator circuit is connected in parallel with the bi-directional voltage stabilizing pipe.
Wherein, the current rectifying and wave filtering circuit includes：Rectification unit is connect, for making the pair with the secondary side output end
The alternating current of side output end output is converted to the direct current of pulsation；Filter unit is protected with the rectification unit, the over-voltage respectively
Protection circuit connection, for the direct current of the pulsation to be converted to smooth direct current.
Wherein, the voltage regulator circuit includes first capacitor, the first inductance, switching tube, the second capacitor, the second inductance, two poles
Pipe and third capacitor；The first capacitor is in parallel with the overvoltage crowbar, the input terminal of first inductance and described the
The input terminal of one capacitor connects, and the drain electrode of the switching tube is connect with the output end of first inductance, the source of the switching tube
Pole is connect with the output end of the first capacitor, and the input terminal of second capacitor is connect with the drain electrode of the switching tube；It is described
The input terminal of second inductance is connect with the output end of second capacitor, output end and the switching tube of second inductance
The anode of source electrode connection, the diode is connect with the output end of second inductance, the input terminal of the third capacitor and institute
The cathode connection of diode is stated, the output end of the third capacitor is connect with the output end of second inductance.
Wherein, the voltage regulator circuit further includes driver, and the driver is connect with the grid of the switching tube, the drive
Dynamic device is for driving the switching tube to work.
The beneficial effect of the utility model embodiment is：It is in contrast to the prior art, the utility model embodiment
The input side of power supply and outlet side are isolated by setting power frequency isolation transformer, will not generate leakage current by lightning protection power source, gram
The defect of traditional SPD lightning protection has been taken, also, current foldback circuit and overvoltage protection electricity are set at the both ends of power frequency isolation transformer
Road improves the safety of lightning protection power source, so as to effectively realize power lightning protection.
Detailed description of the invention
One or more embodiments are illustrated by the picture in corresponding attached drawing, these exemplary theorys
The bright restriction not constituted to embodiment, the element in attached drawing with same reference numbers label are expressed as similar element, remove
Non- to have special statement, composition does not limit the figure in attached drawing.
Fig. 1 is the structural schematic diagram of the lightning protection power source of the prior art；
Fig. 2 is the structural schematic diagram of the utility model lightning protection power source that wherein an embodiment provides；
Fig. 3 is the structural schematic diagram of the lightning protection power source of Fig. 2；
Fig. 4 is the structural schematic diagram of the transformer core of the lightning protection power source of Fig. 3；
Fig. 5 is the structural schematic diagram of the voltage regulator circuit of the lightning protection power source of Fig. 3.
Specific embodiment
For the ease of understanding the utility model, in the following with reference to the drawings and specific embodiments, the utility model is carried out more detailed
Thin explanation.It should be noted that it can be directly in another element when element is expressed " being fixed on " another element
Upper or placed in the middle there may be one or more therebetween elements.When an element is expressed " connection " another element, it can
To be directly to another element or elements placed in the middle there may be one or more therebetween.
Unless otherwise defined, technical and scientific term all used in this specification and the skill for belonging to the utility model
The normally understood meaning of the technical staff in art field is identical.Art used in the description of the utility model in this specification
Language, which is only for the purpose of describing specific embodiments, is not intended to limitation the utility model.
Lightning protection power source in the present embodiment, can be integrated into a functional module carry out using, leakage current will not be generated,
The defect of traditional SPD lightning protection can be overcome, and the requirement to ground connection electronics is relatively low, moreover it is possible to the interference effectivelying prevent in power supply
Interference of the signal to equipment, and it is at low cost, and route is simple.
Specifically, with reference to the accompanying drawing, the utility model embodiment is further elaborated.
Fig. 2 is the structural schematic diagram of the utility model lightning protection power source that wherein an embodiment provides.As shown in Fig. 2, this is anti-
Thunder and lightning source 100 includes input terminal 10, current foldback circuit 20, power frequency isolation transformer 30, current rectifying and wave filtering circuit 40, overvoltage protection
Circuit 50 and voltage regulator circuit 60.Wherein, input terminal 10 is connect with current foldback circuit 20, and current foldback circuit 20 is isolated with power frequency
Transformer 30 connects, and power frequency isolation transformer 30 is connect with current rectifying and wave filtering circuit 40, current rectifying and wave filtering circuit 40 and overvoltage protection electricity
Road 50 connects, and overvoltage crowbar 50 is connect with voltage regulator circuit 60.
Specifically, also referring to Fig. 3, input terminal 10 includes zero line 11 and zero line side 12, zero line 11, zero line side 12
It is connect respectively with current foldback circuit 20.Input terminal 10 is used to access the input circuit of lightning protection power source 100, to provide input electricity
Pressure.Input terminal 10 can be attached with alternating current 220V, for being used as AC current input terminal.Certainly, in some other implementations
In example, input terminal 10 can be electrically connected with the exchange of other grades.It is illustrated for inputting 220V alternating current in the present embodiment
It is bright.
It is understood that input terminal 10 can be omitted in some other embodiments, alternating current can directly and overcurrent
Circuit 20 is protected to connect.
Current foldback circuit 20 is used to carry out overcurrent protection to the input side of power frequency isolation transformer 30, to prevent from inputting
The excessive damage lightning protection power source 100 of the electric current of side.
Wherein, current foldback circuit 20 includes two resettable fuse (Positive Temperature
Coefficient, PTC), respectively the first resettable fuse 21 and the second resettable fuse 22.First can restore to insure
The input terminal of silk 21 is connect with zero line 11, and the output end of the first resettable fuse 21 is connect with power frequency isolation transformer 30；
The input terminal of second resettable fuse 22 is connect with zero line side 12, and the output end of the second resettable fuse 22 is isolated with power frequency
Transformer 30 connects.Wherein, when short circuit or overload occur for route, the heat for flowing through the high current generation of resettable fuse makes
Resettable fuse, volume increase rapidly, form high-impedance state, and operating current is reduced rapidly, thus to circuit carry out limitation and
Protection.
It is understood that resettable fuse can be replaced with other components in some other embodiments, such as
Fast current relay protection, automatic air circuit breaker protection and electronic circuit protection etc. are sampled, as long as being able to achieve overcurrent protection
Purpose.
The frequency of the input side of power frequency isolation transformer 30 is 50Hz, and rated operation point is located at power frequency isolation transformer 30
Magnetization curve saturation section, guarantee that power frequency isolation transformer 30 effectively inhibits the overvoltage of AC power source, and it is simultaneous
The exciting current of power frequency isolation transformer 30 is cared for, to guarantee the higher efficiency of power frequency isolation transformer 30.Wherein, magnetization curve
Saturation section be magnetization curve saturation point left and right segment, range can according to actual use demand freely be arranged.
Wherein, power frequency isolation transformer 30 includes primary side input terminal 31, secondary side output end 32, transformer core 33.Primary side is defeated
Enter end 31 to connect with current foldback circuit 20, specifically, one end of primary side input terminal 31 is defeated with the first resettable fuse 21
Outlet connection, the other end of primary side input terminal 31 are connect with the output end of the second resettable fuse 22.Secondary side output end 32 with
Current rectifying and wave filtering circuit 40 connects, and one end ground connection of secondary side output end 32.Transformer core 33 respectively with primary side input terminal 31 and
Secondary side output end 32 connects, for primary side input terminal 31 and secondary side output end 32 to be isolated so that the input side of lightning protection power source 100 and
Outlet side isolation, so as to effectively realize power lightning protection.
Wherein, referring to Figure 4 together, transformer core 33 includes primary coil 331, secondary coil 332 and magnetic core 333.Just
Rotating around the both ends for being set to magnetic core 333, primary coil 331 is connect with primary side input terminal 31 for grade coil 331 and secondary coil 332,
Secondary coil 332 is connect with secondary side output end 32, and secondary coil 332 receives the electromagnetic field that primary coil 31 emits by mutual inductance,
And be converted to power output.
Optionally, the number of turns of primary coil 331 is greater than the number of turns of secondary coil 332, to make power frequency isolation transformer 30
While isolation, additionally it is possible to voltage is reduced, thus keep the subsequent voltage in current rectifying and wave filtering circuit 40 lower, convenient for handling,
So as to obtain low-voltage DC.
Optionally, the pressure-resistant parameter of transformer core 33 is：Primary side/pair side 25kV, 1.2/50 μ s；Primary side/ground 25kV, 1.2/
50μs；Secondary side/ground 25kV, 1.2/50 μ s are resistant to the thunder and lightning of power frequency isolation transformer 30 more than 1.2/50 μ s of 10kV.
Current rectifying and wave filtering circuit 40 is used to the alternating current that lightning protection power source 100 inputs being converted to direct current electricity output.Rectifying and wave-filtering
Circuit 40 includes rectification unit 41 and filter unit 42, and rectification unit 41 is connect with filter unit 42.Wherein, rectification unit 41 can
Think full-bridge rectification or halfwave rectifier, the input terminal both ends of rectification unit 41 are connect with the both ends of secondary side output end 32 respectively, are used
The direct current of pulsation is converted in the alternating current for exporting secondary side output end 32.Filter unit 42 is LC filter unit, including mutual
The inductance and a capacitor being connected in series.The side of filter unit 42 and the output end both ends of rectification unit 41 are connected in parallel,
The other side of filter unit 42 is connected in parallel with overvoltage crowbar 50.Filter unit 42 is for being converted to the direct current of pulsation
Smooth direct current.By the way that rectification unit 41 is arranged, it can prevent the lightning surge of 100 outlet side of lightning protection power source from invading and damaging
Power frequency isolation transformer 30, while direct current can be converted alternating current to, equipment is powered；By the way that filter unit is arranged
42, it can prevent lightning surge from invading and damaging rectification unit 41, while smooth direct current can be obtained, effectively prevent power supply
In interference of the interference signal (harmonic wave etc.) to electrical equipment.
Overvoltage crowbar 50 is used to prevent lightning surge when thunder and lightning is invaded from the electrical equipment end of lightning protection power source 100
Damage current rectifying and wave filtering circuit 40.Overvoltage crowbar 50 includes transient diode 51 and bi-directional voltage stabilizing pipe 52.Transient diode 51
(Transient Voltage Suppressor, TVS) is a kind of high-effect protection device of diode, when the two of TVS
When pole is by reversed transient state high energy impact events, the high impedance of its two interpolar can be become Low ESR rapidly by it, be absorbed up to thousands of
Watt surge power.Transient diode 51 and the filter unit 42 of current rectifying and wave filtering circuit 40 are connected in parallel, to absorb from lightning protection
The lightning surge of the electrical equipment end invasion of power supply 100.The side of bi-directional voltage stabilizing pipe 52 is connected in parallel with transient diode 51, double
It is connected in parallel to the other side of voltage-stabiliser tube 52 with voltage of voltage regulation 60.The positive and negative both direction of bi-directional voltage stabilizing pipe 52 has pressure stabilizing work
With no matter which direction of both ends reaches the breakdown reverse voltage of burning voltage, the voltage at its both ends can all keeping not substantially
Become, to carry out effective lightning protection.In the present embodiment, when thunder and lightning is invaded from the electrical equipment end of lightning protection power source 100, so that mistake
When the lightning surge at 50 both ends of voltage protection circuit is more than the breakdown reverse voltage of bi-directional voltage stabilizing pipe 52, bi-directional voltage stabilizing pipe 52 is hit
It wears, while transient diode 51 absorbs lightning surge, to carry out effective lightning protection.
It is understood that bi-directional voltage stabilizing pipe 52 can use the pressure stabilizing of two differential concatenations in some other embodiments
Diode in place.
The input terminal of voltage regulator circuit 60 is connect with the output end of overvoltage crowbar 50.Voltage regulator circuit 60 can be linear steady
Volt circuit or switching power circuit, cost is relatively low for linear voltage-stabilizing circuit, but power-efficient is relatively low；Switching power circuit at
This is higher, but power-efficient is also higher, can be selected according to real cost of production and performance requirement.
In the present embodiment, voltage regulator circuit 60 is non-isolated Switching Power Supply.Please refer to fig. 5, voltage regulator circuit 60 wraps
Include first capacitor 61, the first inductance 62, switching tube 63, the second capacitor 64, the second inductance 65, diode 66 and third capacitor 67.
First capacitor 61 is in parallel with the bi-directional voltage stabilizing pipe 52 of overvoltage crowbar 50, input terminal and the first capacitor 62 of the first inductance 62
Input terminal connection, the drain electrode of switching tube 63 are connect with the output end of the first inductance 62, the source electrode and first capacitor 61 of switching tube 63
Output end connection, the input terminal of the second capacitor 64 connect with the drain electrode of switching tube 63, the input terminal and second of the second inductance 65
The output end of capacitor 64 connects, and the output end of the second inductance 65 connect with the source electrode of switching tube 63, diode 66 positive and the
The output end of two inductance 64 connects, and the input terminal of third capacitor 67 is connect with the cathode of diode 66, the output of third capacitor 67
End is connect with the output end of the second inductance 65.In the present embodiment, when according to isolating switch power as voltage regulator circuit, anti-
Lei Zhong, between the output of the 220V alternating current and lightning protection power source 100 of input, the output of power frequency electric depressor 30 and lightning protection power source 100
Output between may be discharged breakdown, so that lightning protection power source can be damaged；When using Unisolated switch power supply, input
220V alternating current is equal with the current potential of the output of power frequency electric depressor 30, and in lightning protection, lightning voltage will be held by power frequency electric depressor 30
Load, thus effective protection lightning protection power source.
Wherein, voltage regulator circuit 60 further includes driver (not shown), and driver can be pwm driver or control chip etc.
Deng.Driver is connect with the grid of switching tube 63, and driver works for driving switch pipe 63.In the present embodiment, pass through drive
Dynamic device is connect with the grid of switching tube 63, and the duty cycle rates of driver control driving switch pipe 63 are carried out control switch pipe 63 and switched
The duration in stage, when output voltage is bigger than pre-set output voltage, the duty cycle rates of regulating switch pipe 63, so that switching tube 64
The stage opened shortens, to make output voltage be reduced to pre-set output voltage, to achieve the purpose that burning voltage.
In the present embodiment, the course of work of lightning protection power source 100 is substantially：When lightning protection power source 100 accesses 220V alternating current
When, alternating current is accessed from zero line 11 and zero line side 12, after current foldback circuit 20, in power frequency isolation transformer 30 into
Row isolation and decompression；Power frequency isolation transformer 30 passes through setting primary coil 331 and 332 turn ratio of secondary coil, control exchange
The decompression of electricity, and the alternating current after output buck；Alternating current after decompression passes through current rectifying and wave filtering circuit 40, is converted into low-pressure direct
Galvanic electricity；Low-voltage DC exports after overvoltage crowbar 50, voltage regulator circuit 60, obtains stable low-voltage DC, thus
To power supply for electrical equipment.
In the present embodiment, the anti-ray process of lightning protection power source 100 is substantially：When thunder and lightning is invaded from 220V alternating current side,
The fusing of current foldback circuit 20 forms high-impedance state, to protect power frequency isolation transformer 30, while lightning surge is due to power frequency
Isolating transformer 30 is isolated with outlet side, prevents electrical equipment from being damaged by thunder and lightning；When thunder and lightning is from the electrical equipment of lightning protection power source 100
When the invasion of end, overvoltage crowbar 50 prevents lightning surge from entering and damaging current rectifying and wave filtering circuit 40, to prevent 220V from exchanging
Electric side is damaged by thunder and lightning, to effectively realize power lightning protection.
Lightning protection power source 100 is by setting power frequency isolation transformer 30 in the present embodiment, by the input side of lightning protection power source 100 and
Outlet side isolation, will not generate leakage current, overcome the defect of traditional SPD lightning protection, also, in power frequency isolation transformer 30
Current foldback circuit 20 and overvoltage crowbar 30 is arranged in both ends, the safety of lightning protection power source is improved, so as to effectively
Realize power lightning protection.
Finally it should be noted that：Above embodiments are only to illustrate the technical solution of the application, rather than its limitations；At this
It under the thinking of application, can also be combined between the technical characteristic in above embodiments or different embodiment, step can be with
It is realized with random order, and there are many other variations of the different aspect of the application as described above, for simplicity, they do not have
Have and is provided in details；Although the application is described in detail with reference to the foregoing embodiments, the ordinary skill people of this field
Member should understand that：It is still possible to modify the technical solutions described in the foregoing embodiments, or to part of skill
Art feature is equivalently replaced；And these are modified or replaceed, each reality of the application that it does not separate the essence of the corresponding technical solution
Apply the range of a technical solution.
Claims (10)
1. a kind of lightning protection power source, which is characterized in that including：Current foldback circuit, power frequency isolation transformer, current rectifying and wave filtering circuit,
Overvoltage crowbar and voltage regulator circuit, the current foldback circuit are connect with the power frequency isolation transformer, the power frequency isolation
Transformer is connect with the current rectifying and wave filtering circuit, and the current rectifying and wave filtering circuit is connect with the overvoltage crowbar, the over-voltage
Protection circuit is connect with the voltage regulator circuit.
2. lightning protection power source according to claim 1, which is characterized in that the nominal operation point of the power frequency isolation transformer
In the saturation section of the magnetization curve of the power frequency isolation transformer.
3. lightning protection power source according to claim 2, which is characterized in that the power frequency isolation transformer includes：
Primary side input terminal is connect with the current foldback circuit；
Secondary side output end, connect with the current rectifying and wave filtering circuit, one end ground connection of pair side output end；
Transformer core is connect, for the primary side input terminal to be isolated respectively with the primary side input terminal and the secondary side output end
With the secondary side output end.
4. lightning protection power source according to claim 3, which is characterized in that the transformer core includes primary coil, secondary wire
Circle and magnetic core；
The primary coil and the secondary coil are rotating around set on the magnetic core, the primary coil and the primary side input terminal
Connection, the secondary coil are connect with the secondary side output end, and the secondary coil receives the primary coil by mutual inductance and sends out
The electromagnetic field penetrated, and be converted to power output.
5. lightning protection power source according to claim 3, which is characterized in that the current foldback circuit, which includes two, can restore to protect
Dangerous silk, the output end of two resettable fuses are connect with the both ends of the primary side input terminal respectively.
6. lightning protection power source according to claim 5, which is characterized in that the lightning protection power source further includes input terminal, described defeated
Entering end includes zero line and zero line side, the input with two resettable fuses respectively of the zero line, the zero line side
End connection.
7. lightning protection power source according to claim 5, which is characterized in that the overvoltage crowbar includes：
Transient diode is connected in parallel with the current rectifying and wave filtering circuit；
Bi-directional voltage stabilizing pipe is connected in parallel with the transient diode；
The voltage regulator circuit is connected in parallel with the bi-directional voltage stabilizing pipe.
8. lightning protection power source according to claim 5, which is characterized in that the current rectifying and wave filtering circuit includes：
Rectification unit is connect with the secondary side output end, and the alternating current for exporting the secondary side output end is converted to pulsation
Direct current；
Filter unit is connect with the rectification unit, the overvoltage crowbar respectively, for turning the direct current of the pulsation
It is changed to smooth direct current.
9. lightning protection power source according to claim 1-8, which is characterized in that the voltage regulator circuit includes the first electricity
Appearance, the first inductance, switching tube, the second capacitor, the second inductance, diode and third capacitor；
The first capacitor is in parallel with the overvoltage crowbar,
The input terminal of first inductance is connect with the input terminal of the first capacitor,
The drain electrode of the switching tube is connect with the output end of first inductance, the source electrode of the switching tube and the first capacitor
Output end connection,
The input terminal of second capacitor is connect with the drain electrode of the switching tube；
The input terminal of second inductance is connect with the output end of second capacitor, the output end of second inductance with it is described
The source electrode of switching tube connects,
The anode of the diode is connect with the output end of second inductance,
The input terminal of the third capacitor is connect with the cathode of the diode, the output end of the third capacitor and described second
The output end of inductance connects.
10. lightning protection power source according to claim 9, which is characterized in that the voltage regulator circuit further includes driver, the drive
Dynamic device is connect with the grid of the switching tube, and the driver is for driving the switching tube to work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820732503.1U CN208112521U (en) | 2018-05-16 | 2018-05-16 | A kind of lightning protection power source |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820732503.1U CN208112521U (en) | 2018-05-16 | 2018-05-16 | A kind of lightning protection power source |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111614273A (en) * | 2020-06-23 | 2020-09-01 | 山东泰开高压开关有限公司 | Device for suppressing high-frequency oscillation in common high-frequency bus converter and converter |
| CN112332642A (en) * | 2020-11-19 | 2021-02-05 | 厦门市科力电子有限公司 | Switch power supply for inhibiting EFT |
-
2018
- 2018-05-16 CN CN201820732503.1U patent/CN208112521U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111614273A (en) * | 2020-06-23 | 2020-09-01 | 山东泰开高压开关有限公司 | Device for suppressing high-frequency oscillation in common high-frequency bus converter and converter |
| CN112332642A (en) * | 2020-11-19 | 2021-02-05 | 厦门市科力电子有限公司 | Switch power supply for inhibiting EFT |
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