CN210225246U - Lightning and surge protection circuit for intelligent power circuit - Google Patents
Lightning and surge protection circuit for intelligent power circuit Download PDFInfo
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- CN210225246U CN210225246U CN201920827580.XU CN201920827580U CN210225246U CN 210225246 U CN210225246 U CN 210225246U CN 201920827580 U CN201920827580 U CN 201920827580U CN 210225246 U CN210225246 U CN 210225246U
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Abstract
The utility model discloses an intelligent power supply circuit lightning protection surge protection circuit, which comprises a power supply circuit, a leakage current detection circuit, an isolation circuit and an overcurrent protection cut-off device, wherein the power supply circuit is connected with the leakage current detection circuit, the leakage current detection circuit is connected with the isolation circuit, and the isolation circuit is connected with the overcurrent protection cut-off device; the power supply circuit comprises a direct current power supply, a second diode, a first capacitor, a first triode, a transformer, a second capacitor, a second triode, a first diode, a first potentiometer, a third capacitor, a third triode, a second resistor, a transient suppression diode and a light emitting diode, wherein the direct current power supply is respectively connected with the anode of the first diode, the emitting electrode of the first triode, the collecting electrode of the third triode and one end of the second resistor. The utility model discloses circuit structure is comparatively simple, the cost is lower, the security and the reliability of convenient maintenance, circuit are higher.
Description
Technical Field
The utility model relates to a power supply circuit field, in particular to intelligence power supply circuit lightning protection surge protection circuit.
Background
The power supply module is a power supply device which can be directly attached to a printed circuit board and is characterized by supplying power to an Application Specific Integrated Circuit (ASIC), a Digital Signal Processor (DSP), a microprocessor, a memory, a Field Programmable Gate Array (FPGA) and other digital or analog loads. Due to the advantages of the modular structure, the modular power supply is widely used in the communication fields of switching equipment, access equipment, mobile communication, microwave communication, optical transmission, routers and the like, and in automotive electronics, aerospace and the like. The traditional intelligent power supply circuit has the disadvantages of more components, complex circuit structure, higher hardware cost and inconvenient maintenance. In addition, since the conventional intelligent power supply circuit lacks a corresponding circuit protection function, for example: the safety and reliability of the circuit are poor due to the lack of the current-limiting protection function.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a circuit structure comparatively simple, the cost is lower, the security and the higher intelligent power supply circuit lightning protection surge protection circuit of reliability of convenient maintenance, circuit.
The utility model provides a technical scheme that its technical problem adopted is: the lightning protection surge protection circuit of the intelligent power circuit is constructed and comprises a power circuit, a leakage current detection circuit, an isolation circuit and an overcurrent protection cut-off device, wherein the power circuit is connected with the leakage current detection circuit, the leakage current detection circuit is connected with the isolation circuit, and the isolation circuit is connected with the overcurrent protection cut-off device;
the power circuit comprises a direct current power supply, a second diode, a first capacitor, a first triode, a transformer, a second capacitor, a second triode, a first diode, a first potentiometer, a third capacitor, a third triode, a second resistor, a transient suppression diode and a light emitting diode, wherein the direct current power supply is respectively connected with an anode of the first diode, an emitting electrode of the first triode, a collector electrode of the third triode and one end of the second resistor, a cathode of the second diode is respectively connected with one end of the first capacitor, the collector electrode of the first triode, one end of a primary coil of the transformer and a cathode of the first diode, the other end of the primary coil of the transformer is grounded, a base electrode of the first triode is respectively connected with one end of the second capacitor and the collector electrode of the second triode, the other end of the second capacitor is connected with one end of a secondary coil of the transformer, the other end of first electric capacity with the other end of the secondary coil of transformer is connected, the projecting pole ground connection of second triode, the base of second triode with the sliding end of first potentiometre is connected, the projecting pole of third triode with a stiff end of first potentiometre is connected, the base of third triode respectively with the other end of second resistance and transient suppression diode's one end are connected, the positive pole of first diode respectively with another stiff end of first potentiometre, the one end of third electric capacity, transient suppression diode's the other end and the positive pole of emitting diode are connected, the other end of third electric capacity and emitting diode's negative pole all ground connection, the model of second diode is E-123.
Intelligent power supply circuit lightning protection surge protection circuit in, power supply circuit still includes the third resistance, the one end of third resistance respectively with the positive pole of another stiff end of first potentiometre, first diode and the one end of third electric capacity are connected, the other end of third resistance respectively with the other end of transient suppression diode and emitting diode's positive pole are connected, the resistance of third resistance is 35k omega.
Intelligent power supply circuit lightning protection surge protection circuit in, power supply circuit still includes fourth resistance, the one end of fourth resistance respectively with DC power supply, the positive pole of second diode and the projecting pole of first triode are connected, the other end of fourth resistance respectively with the one end of second resistance and the collecting electrode of third triode are connected, the resistance of fourth resistance is 42k omega.
Intelligent power supply circuit lightning protection surge protection circuit in, power supply circuit still includes fourth electric capacity, the one end of fourth electric capacity respectively with the base of first triode and the one end of second electric capacity are connected, the other end of fourth electric capacity with the collecting electrode of second triode is connected, the capacitance value of fourth electric capacity is 360 pF.
Intelligent power supply circuit lightning protection surge protection circuit in, first triode is PNP type triode, second triode and third triode are NPN type triode.
Implement the utility model discloses an intelligent power supply circuit lightning protection surge protection circuit has following beneficial effect: because be equipped with power supply circuit, leakage current detection circuit, buffer circuit and overcurrent protection cutting device, power supply circuit includes DC power supply, the second diode, first electric capacity, first triode, the transformer, the second electric capacity, the second triode, first diode, first potentiometre, the third electric capacity, the third triode, the second resistance, transient suppression diode and emitting diode, this power supply circuit compares with traditional intelligent power supply circuit, the components and parts that it used are less, can reduce the hardware cost like this, in addition, the second diode is used for carrying out current-limiting protection, therefore circuit structure is comparatively simple, the cost is lower, convenient maintenance, the security and the reliability of circuit are higher.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the lightning protection surge protection circuit of the intelligent power supply circuit of the present invention;
fig. 2 is a circuit schematic diagram of the power supply circuit in the embodiment.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model discloses in the intelligent power supply circuit lightning protection surge protection circuit embodiment, this intelligent power supply circuit lightning protection surge protection circuit's structural schematic is shown in FIG. 1. In fig. 1, the lightning protection surge protection circuit of the intelligent power circuit comprises a power circuit 1, a leakage current detection circuit 2, an isolation circuit 3 and an overcurrent protection disconnector 4, wherein the power circuit 1 is connected with the leakage current detection circuit 2, the leakage current detection circuit 2 is connected with the isolation circuit 3, and the isolation circuit 3 is connected with the overcurrent protection disconnector 4.
The leakage current detection circuit 2 includes a leakage current sensor for receiving a sensing signal of the leakage current. The isolation circuit 3 is used for signal isolation, and the overcurrent protection disconnector 4 is used for overcurrent protection of the isolated signal.
The leakage current detection circuit 2, the isolation circuit 3 and the overcurrent protection disconnector 4 all adopt any structure capable of realizing the functions in the prior art. The working principle of the method is also the working principle in the prior art, and the method is not described in mastiff here.
Fig. 2 is a schematic circuit diagram of a power circuit in this embodiment, in fig. 2, the power circuit 1 includes a dc power source VCC, a second diode D2, a first capacitor C1, a first transistor Q1, a transformer T, a second capacitor C2, a second transistor Q2, a first diode D1, a first potentiometer RP1, a third capacitor C3, a third transistor Q3, a second resistor R2, a transient suppression diode VS, and a light emitting diode LED, the dc power source VCC is connected to an anode of the first diode D1, an emitter of the first transistor Q1, a collector of the third transistor Q3, and one end of a second resistor R2, a cathode of the second diode D2 is connected to one end of the first capacitor C1, a collector of the first transistor Q1, one end of a primary coil of the transformer T, and a cathode of the first diode D1, the other end of the primary coil of the transformer T is grounded, a base of the first transistor Q1 is connected to one end of the first capacitor C67 2 6 and the collector of the second capacitor Q2, the other end of the second capacitor C2 is connected with one end of a secondary coil of the transformer T, the other end of the first capacitor C1 is connected with the other end of the secondary coil of the transformer T, the emitter of the second triode Q2 is grounded, the base of the second triode Q2 is connected with the sliding end of the first potentiometer RP1, the emitter of the third triode Q3 is connected with one fixed end of the first potentiometer RP1, the base of the third triode Q3 is connected with the other end of the second resistor R2 and one end of the transient suppression diode VS respectively, the anode of the first diode D1 is connected with the other fixed end of the first potentiometer RP1, one end of the third capacitor C3, the other end of the transient suppression diode VS and the anode of the light emitting diode LED respectively, and the other end of the third capacitor C3 and the cathode of the light emitting diode LED are both grounded.
Compared with a traditional intelligent power circuit, the power circuit 1 saves components such as capacitors, resistors and inductors, uses fewer components, is simple in circuit structure and convenient to maintain, can reduce hardware cost, and is used for current-limiting protection because the second diode D2 is a current-limiting diode, so that the circuit is high in safety and reliability. It should be noted that in this embodiment, the second diode D2 has a model number of E-123, but in practical applications, other models of diodes with similar functions may be adopted as the second diode D2.
The working principle of the power supply circuit 1 is as follows: the gap type oscillator is composed of a first triode Q1, a transformer T and a second capacitor C2, the gap time of the gap type oscillator is completely controlled by the voltage at two ends of a light emitting diode LED, when a direct current power supply VCC is connected, the first triode Q1, the second triode Q2 and a third triode Q3 are conducted, the direct current power supply VCC is added to the transformer T through a first triode Q1, the current passing through a primary coil of the transformer T is increased in a linear rule, and rectangular pulse voltage with positive lower part and negative upper part is induced on a secondary coil; the induced voltage further turns on the first transistor Q1 through the second capacitor C2, the current of the primary winding of the transformer T is further increased, a sudden avalanche positive feedback is formed between the transformer T and the first transistor Q1, the first transistor Q1 rapidly enters a saturation state, during which, on the one hand, the transformer T stores energy and, on the other hand, the second capacitor C2 starts to charge (the polarity of the charging voltage is negative positive and positive).
When the current in the primary winding of the transformer T cannot be increased any more due to the saturation of the first transistor Q1, the voltage induced in the secondary winding of the transformer T starts to change in the opposite direction, which voltage in combination with the voltage across the second capacitor C2 causes the current in the collector of the first transistor Q1 to decrease, and in the same way, a positive feedback avalanche process rapidly switches off the first transistor Q1, during which the first diode D1 starts to conduct and discharges the energy stored in the primary winding of the transformer T during the saturation of the conduction of the first transistor Q1 through the third capacitor C3.
The voltage stabilizing principle of the power supply circuit 1 is as follows: the voltage stabilizing process of the circuit is realized by changing the intermittent time of the first triode Q1. When the direct current power supply VCC increases or the current of the light emitting diode LED decreases, the voltage at the two ends of the transient suppression diode VS is unchanged, so that the potential of the collector of the third triode Q3 is reduced, the current of the collectors of the third triode Q3 and the second triode Q2 is reduced, the cut-off time of the first triode Q1 is increased, and the saturation conduction time is reduced, so that the conduction time of the first triode Q1 is shortened, the current of the primary coil of the transformer T is reduced, the stored energy is reduced, the released energy is reduced, and the voltage at the two ends of the light emitting diode LED is reduced to the original rated voltage stabilization value. Similarly, when the voltage of the dc power VCC decreases or the current of the LED increases, the self-regulation process is reversed.
In this embodiment, the first transistor Q1 is a PNP transistor, and the second transistor Q2 and the third transistor Q3 are NPN transistors. Certainly, in practical applications, the first transistor Q1 may also be an NPN-type transistor, and the second transistor Q2 and the third transistor Q3 may also be PNP-type transistors, but the structure of the circuit is also changed accordingly.
In this embodiment, the power circuit 1 further includes a third resistor R3, one end of the third resistor R3 is respectively connected to the other fixed end of the first potentiometer RP1, the anode of the first diode D1, and one end of the third capacitor C3, and the other end of the third resistor R3 is respectively connected to the other end of the transient suppression diode VS and the anode of the light emitting diode LED. The third resistor R3 is a current limiting diode for current limiting protection to further enhance the safety and reliability of the circuit. It should be noted that, in the present embodiment, the resistance of the third resistor R3 is 35k Ω. Of course, in practical applications, the resistance of the third resistor R3 may be adjusted according to specific situations, that is, the resistance of the third resistor R3 may be increased or decreased according to specific situations.
In this embodiment, the power circuit 1 further includes a fourth resistor R4, one end of the fourth resistor R4 is connected to the dc power VCC, the anode of the second diode D2, and the emitter of the first transistor Q1, respectively, and the other end of the fourth resistor R4 is connected to one end of the second resistor R2 and the collector of the third transistor Q3, respectively. The fourth resistor R4 is a current limiting resistor for current limiting protection to further enhance the safety and reliability of the circuit. It should be noted that, in the present embodiment, the resistance of the fourth resistor R4 is 42k Ω. Of course, in practical applications, the resistance of the fourth resistor R4 may be adjusted according to specific situations, that is, the resistance of the fourth resistor R4 may be increased or decreased according to specific situations.
In this embodiment, the power circuit 1 further includes a fourth capacitor C4, one end of the fourth capacitor C4 is connected to the base of the first transistor Q1 and one end of the second capacitor C2, respectively, and the other end of the fourth capacitor C4 is connected to the collector of the second transistor Q2. The fourth capacitor C4 is a coupling capacitor for preventing interference between the first transistor Q1 and the second transistor Q2, so as to further enhance the effect of preventing signal interference. It should be noted that, in the present embodiment, the capacitance of the fourth capacitor C4 is 360 pF. Of course, in practical applications, the capacitance value of the fourth capacitor C4 may be adjusted accordingly, that is, the capacitance value of the fourth capacitor C4 may be increased or decreased accordingly.
In a word, in this embodiment, this power supply circuit 1 compares with traditional intelligent power supply circuit, and its components and parts that use are less, and circuit structure is comparatively simple, and convenient the maintenance can reduce the hardware cost like this, in addition, is equipped with current-limiting diode in this power supply circuit 1, and therefore the security and the reliability of circuit are higher.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (5)
1. An intelligent power circuit lightning protection surge protection circuit is characterized by comprising a power circuit, a leakage current detection circuit, an isolation circuit and an overcurrent protection cut-off device, wherein the power circuit is connected with the leakage current detection circuit, the leakage current detection circuit is connected with the isolation circuit, and the isolation circuit is connected with the overcurrent protection cut-off device;
the power circuit comprises a direct current power supply, a second diode, a first capacitor, a first triode, a transformer, a second capacitor, a second triode, a first diode, a first potentiometer, a third capacitor, a third triode, a second resistor, a transient suppression diode and a light emitting diode, wherein the direct current power supply is respectively connected with an anode of the first diode, an emitting electrode of the first triode, a collector electrode of the third triode and one end of the second resistor, a cathode of the second diode is respectively connected with one end of the first capacitor, the collector electrode of the first triode, one end of a primary coil of the transformer and a cathode of the first diode, the other end of the primary coil of the transformer is grounded, a base electrode of the first triode is respectively connected with one end of the second capacitor and the collector electrode of the second triode, the other end of the second capacitor is connected with one end of a secondary coil of the transformer, the other end of first electric capacity with the other end of the secondary coil of transformer is connected, the projecting pole ground connection of second triode, the base of second triode with the sliding end of first potentiometre is connected, the projecting pole of third triode with a stiff end of first potentiometre is connected, the base of third triode respectively with the other end of second resistance and transient suppression diode's one end are connected, the positive pole of first diode respectively with another stiff end of first potentiometre, the one end of third electric capacity, transient suppression diode's the other end and the positive pole of emitting diode are connected, the other end of third electric capacity and emitting diode's negative pole all ground connection, the model of second diode is E-123.
2. The lightning protection surge protection circuit of claim 1, wherein the power supply circuit further comprises a third resistor, one end of the third resistor is connected to the other fixed end of the first potentiometer, the anode of the first diode and one end of a third capacitor, the other end of the third resistor is connected to the other end of the transient suppression diode and the anode of the light emitting diode, and the resistance of the third resistor is 35k Ω.
3. The lightning protection surge protection circuit of an intelligent power supply circuit according to claim 2, wherein the power supply circuit further comprises a fourth resistor, one end of the fourth resistor is connected to the dc power supply, the anode of the second diode and the emitter of the first transistor, the other end of the fourth resistor is connected to one end of the second resistor and the collector of the third transistor, and the resistance of the fourth resistor is 42k Ω.
4. The intelligent power supply circuit lightning protection surge protection circuit according to claim 3, wherein the power supply circuit further comprises a fourth capacitor, one end of the fourth capacitor is connected to the base of the first transistor and one end of the second capacitor, respectively, the other end of the fourth capacitor is connected to the collector of the second transistor, and the capacitance of the fourth capacitor is 360 pF.
5. The lightning protection surge protection circuit of any one of claims 1 to 4, wherein the first transistor is a PNP transistor, and the second and third transistors are NPN transistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920827580.XU CN210225246U (en) | 2019-05-31 | 2019-05-31 | Lightning and surge protection circuit for intelligent power circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920827580.XU CN210225246U (en) | 2019-05-31 | 2019-05-31 | Lightning and surge protection circuit for intelligent power circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210225246U true CN210225246U (en) | 2020-03-31 |
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ID=69929752
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920827580.XU Expired - Fee Related CN210225246U (en) | 2019-05-31 | 2019-05-31 | Lightning and surge protection circuit for intelligent power circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210225246U (en) |
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2019
- 2019-05-31 CN CN201920827580.XU patent/CN210225246U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
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Granted publication date: 20200331 |