CN205490111U - Anti harmonic interference DC power supply circuit - Google Patents
Anti harmonic interference DC power supply circuit Download PDFInfo
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- CN205490111U CN205490111U CN201620215472.3U CN201620215472U CN205490111U CN 205490111 U CN205490111 U CN 205490111U CN 201620215472 U CN201620215472 U CN 201620215472U CN 205490111 U CN205490111 U CN 205490111U
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- rectifier bridge
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Abstract
The utility model discloses an anti harmonic interference DC power supply circuit, including inductance L1, rectifier bridge T, resistance R7 and electric capacity C8, electric capacity C8 and 220V alternating current are connected to resistance R7's one end, and electric capacity C8 and rectifier bridge T's port 1 is connected to resistance R7's the other end, and electric capacity C1 and inductance L1 are connected to rectifier bridge T's port 2, and electric capacity C2, electric capacity C3 and inductance L3 are connected to inductance L1's the other end, and electric capacity L2 and rectifier bridge T's port 4 is connected to electric capacity C1's the other end. The utility model discloses anti harmonic interference DC power supply circuit simple structure, the mode that adopts the resistance -capacitance to step down steps down, has left out the transformer structure, reduces power supply size to set up two pi filters, removal harmonic disturbs, and the circuit utilizes thermistor to increase soft start and short -circuit protection's function simultaneously, therefore has the advantage of various, the small and stable performance of function.
Description
Technical field
This utility model relates to a kind of power circuit, a kind of anti-harmonic wave interference DC power supply circuit.
Background technology
Along with improving constantly of people's living standard, electronic equipment has become as a requisite part in life, the most various household electrical appliance bring great convenience to the life of people, work, and this kind of electronic installation is desirable that a constant voltage dc source that precision is higher, electric current is bigger.The DC source of existing market is of a great variety, its mid and low-end products are the most, although low-end product has the advantage of price relative to high-end product, but quality is the most as one wishes, all there is the defects such as function singleness, the life-span is short, interference free performance is poor in common power supply, although and high-end product reliable in quality, safety and stability, but price is high also allows people hang back.Therefore need to be improved.
Summary of the invention
The purpose of this utility model is to provide a kind of anti-harmonic wave to disturb DC power supply circuit, with the problem solving to propose in above-mentioned background technology.
For achieving the above object, the following technical scheme of this utility model offer:
nullA kind of anti-harmonic wave interference DC power supply circuit，Including inductance L1、Rectifier bridge T、Resistance R7 and electric capacity C8，One end of described resistance R7 connects electric capacity C8 and 220V alternating current，The other end of resistance R7 connects the port 1 of electric capacity C8 and rectifier bridge T，The port 2 of rectifier bridge T connects electric capacity C1 and inductance L1，The other end of inductance L1 connects electric capacity C2、Electric capacity C3 and inductance L3，The other end of electric capacity C1 connects the port 4 of electric capacity L2 and rectifier bridge T，The other end of inductance L2 connects the other end of electric capacity C2、Electric capacity C4 and inductance L4，The other end of electric capacity C4 connects the other end and the ground of electric capacity C3，The other end of inductance L3 connects inductance L5、Electric capacity C5 and resistance R3，The other end of resistance R3 connects the other end of electric capacity C5、The other end of inductance L4 and the other end of inductance L5，The other end of inductance L5 connects resistance R1、Electric capacity C7 and load A，The other end of resistance R1 connects resistance R2、Electric capacity C6、The negative electrode of diode D1、The colelctor electrode of audion V1 and the grid of metal-oxide-semiconductor Q1，The anode of diode D1 connects the other end of electric capacity C6、Electric capacity C9、The other end of resistance R2、Resistance R4、Resistance R6、The other end of inductance L5、The emitter stage of audion V1 and the drain electrode of metal-oxide-semiconductor Q1，The base stage of audion V1 connects the other end and the anode of diode D2 of resistance R4，The negative electrode of diode D2 connects resistance R5，The other end of resistance R5 connects the other end of electric capacity C7、The other end of electric capacity C9、The other end of resistance R6、The load other end of A and the source electrode of metal-oxide-semiconductor Q1 ground connection.
As preferred version of the present utility model: described resistance R6 is negative tempperature coefficient thermistor.
Compared with prior art; the beneficial effects of the utility model are: this utility model anti-harmonic wave interference DC power supply circuit simple in construction; the mode using resistance-capacitance depressurization carries out blood pressure lowering; eliminate transformer device structure; reducing power volume, and be provided with double pi type filter, harmonic carcellation disturbs; circuit utilizes critesistor to add the function of soft start and short-circuit protection simultaneously, therefore has that diverse in function, volume be little and the advantage of stable performance.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of anti-harmonic wave interference DC power supply circuit.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is clearly and completely described, it is clear that described embodiment is only a part of embodiment of this utility model rather than whole embodiments.Based on the embodiment in this utility model, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of this utility model protection.
nullRefer to Fig. 1，In this utility model embodiment，A kind of anti-harmonic wave interference DC power supply circuit，Including inductance L1、Rectifier bridge T、Resistance R7 and electric capacity C8，One end of described resistance R7 connects electric capacity C8 and 220V alternating current，The other end of resistance R7 connects the port 1 of electric capacity C8 and rectifier bridge T，The port 2 of rectifier bridge T connects electric capacity C1 and inductance L1，The other end of inductance L1 connects electric capacity C2、Electric capacity C3 and inductance L3，The other end of electric capacity C1 connects the port 4 of electric capacity L2 and rectifier bridge T，The other end of inductance L2 connects the other end of electric capacity C2、Electric capacity C4 and inductance L4，The other end of electric capacity C4 connects the other end and the ground of electric capacity C3，The other end of inductance L3 connects inductance L5、Electric capacity C5 and resistance R3，The other end of resistance R3 connects the other end of electric capacity C5、The other end of inductance L4 and the other end of inductance L5，The other end of inductance L5 connects resistance R1、Electric capacity C7 and load A，The other end of resistance R1 connects resistance R2、Electric capacity C6、The negative electrode of diode D1、The colelctor electrode of audion V1 and the grid of metal-oxide-semiconductor Q1，The anode of diode D1 connects the other end of electric capacity C6、Electric capacity C9、The other end of resistance R2、Resistance R4、Resistance R6、The other end of inductance L5、The emitter stage of audion V1 and the drain electrode of metal-oxide-semiconductor Q1，The base stage of audion V1 connects the other end and the anode of diode D2 of resistance R4，The negative electrode of diode D2 connects resistance R5，The other end of resistance R5 connects the other end of electric capacity C7、The other end of electric capacity C9、The other end of resistance R6、The load other end of A and the source electrode of metal-oxide-semiconductor Q1 ground connection.
Resistance R6 is negative tempperature coefficient thermistor.
Operation principle of the present utility model is: 220V line voltage enters rectifier bridge T after the capacitance-resistance voltage reduction circuit blood pressure lowering that resistance R7 and electric capacity C8 forms and carries out full-bridge rectification, double π type filter networks of C1, L1-L4, C2, C3 composition in circuit, mainly electromagnetic noise and the noise signal of input power is suppressed, preventing power supply disturbance, electrical network is disturbed by the high frequency spurs being simultaneously also prevented from power supply generation itself.When circuit opens moment, C5 to be charged, owing to immediate current is big, add R6(critesistor) just can effectively prevent surge current.Because instantaneous energy consumes entirely on R6 resistance, after after certain time, temperature raises, R6 resistance reduces, and the energy that at this moment it consumes is the least, and late-class circuit can normally work.Alternating voltage, after Q1 rectification, obtains the purest DC voltage after C5 filters.If C5 capacity diminishes, the AC ripple of output will increase.C3, C4 are safety electric capacity, and L2, L3 are differential mode inductance.R1, R2, R3, D1, C6, Q1, D2, R4, R5, Q2, R6, C7 form anti-surge circuit.In the moment of the machine of rising, owing to the existence Q2 of C6 is not turned on, electric current constitutes loop through R6.The Q2 conducting when the voltage on C6 is charged to the voltage stabilizing value of D1.If C8 electric leakage or late-class circuit short circuit phenomenon, the pressure drop that the immediate current in start produces on R6 increases, and V1 conducting makes Q1 not have grid voltage to be not turned on, and R6 will burn in the shortest time, to protect late-class circuit.
Claims (2)
- null1. an anti-harmonic wave interference DC power supply circuit，Including inductance L1、Rectifier bridge T、Resistance R7 and electric capacity C8，It is characterized in that，One end of described resistance R7 connects electric capacity C8 and 220V alternating current，The other end of resistance R7 connects the port 1 of electric capacity C8 and rectifier bridge T，The port 2 of rectifier bridge T connects electric capacity C1 and inductance L1，The other end of inductance L1 connects electric capacity C2、Electric capacity C3 and inductance L3，The other end of electric capacity C1 connects the port 4 of electric capacity L2 and rectifier bridge T，The other end of inductance L2 connects the other end of electric capacity C2、Electric capacity C4 and inductance L4，The other end of electric capacity C4 connects the other end and the ground of electric capacity C3，The other end of inductance L3 connects inductance L5、Electric capacity C5 and resistance R3，The other end of resistance R3 connects the other end of electric capacity C5、The other end of inductance L4 and the other end of inductance L5，The other end of inductance L5 connects resistance R1、Electric capacity C7 and load A，The other end of resistance R1 connects resistance R2、Electric capacity C6、The negative electrode of diode D1、The colelctor electrode of audion V1 and the grid of metal-oxide-semiconductor Q1，The anode of diode D1 connects the other end of electric capacity C6、Electric capacity C9、The other end of resistance R2、Resistance R4、Resistance R6、The other end of inductance L5、The emitter stage of audion V1 and the drain electrode of metal-oxide-semiconductor Q1，The base stage of audion V1 connects the other end and the anode of diode D2 of resistance R4，The negative electrode of diode D2 connects resistance R5，The other end of resistance R5 connects the other end of electric capacity C7、The other end of electric capacity C9、The other end of resistance R6、The load other end of A and the source electrode of metal-oxide-semiconductor Q1 ground connection.
- Anti-harmonic wave the most according to claim 1 interference DC power supply circuit, it is characterised in that described resistance R6 is negative tempperature coefficient thermistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620215472.3U CN205490111U (en) | 2016-03-21 | 2016-03-21 | Anti harmonic interference DC power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620215472.3U CN205490111U (en) | 2016-03-21 | 2016-03-21 | Anti harmonic interference DC power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205490111U true CN205490111U (en) | 2016-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620215472.3U Expired - Fee Related CN205490111U (en) | 2016-03-21 | 2016-03-21 | Anti harmonic interference DC power supply circuit |
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| Country | Link |
|---|---|
| CN (1) | CN205490111U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911012A (en) * | 2018-01-12 | 2018-04-13 | 成都互聚科技有限公司 | A kind of electric power system based on computer communication technology design |
-
2016
- 2016-03-21 CN CN201620215472.3U patent/CN205490111U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107911012A (en) * | 2018-01-12 | 2018-04-13 | 成都互聚科技有限公司 | A kind of electric power system based on computer communication technology design |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160817 Termination date: 20180321 |
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| CF01 | Termination of patent right due to non-payment of annual fee |