CN205489479U - Low -cost safety protection power - Google Patents
Low -cost safety protection power Download PDFInfo
- Publication number
- CN205489479U CN205489479U CN201620191696.5U CN201620191696U CN205489479U CN 205489479 U CN205489479 U CN 205489479U CN 201620191696 U CN201620191696 U CN 201620191696U CN 205489479 U CN205489479 U CN 205489479U
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- resistance
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- rectifier bridge
- inductance
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Abstract
The utility model discloses a low -cost safety protection power, including resistance R1, rectifier bridge T, inductance L1 and triode V1, are electric capacity C1 and 220V alternating current connected to resistance R1's one end, and electric capacity C1's the other end and rectifier bridge T's port 1 are connected to resistance R1's the other end, the other ends of rectifier bridge T's 3 connection 220V alternating currents of port, rectifier bridge T's 2 connect electric capacity C2 and inductance L1, electric capacity C3, resistance R3 and triode V1's collecting electrode is connected to inductance L1's the other end. The utility model discloses low -cost safety protection power simple structure, components and parts are few, utilize the on -state characteristic of triode and thyristor for the circuit has short -circuit protection and overvoltage protection's function, thereby effectively protects consumer and circuit, still has simultaneously the harmonic inhibit feature, has consequently that the function is various, safe and reliable and convenient to use's an advantage.
Description
Technical field
This utility model relates to a kind of power supply, specifically a kind of safety protection power supply.
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 the DC source that a precision is higher, applied widely.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, especially can be used in the manostat of electromotor, all there is the defects such as function singleness, life-span short, debugging maintenance difficult 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.
Utility model content
The purpose of this utility model is to provide a kind of safety protection power supply, 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 safety protection power supply，Including resistance R1、Rectifier bridge T、Inductance L1 and audion V1，One end of described resistance R1 connects electric capacity C1 and 220V alternating current，The other end of resistance R1 connects the other end and the port 1 of rectifier bridge T of electric capacity C1，The port 3 of rectifier bridge T connects the other end of 220V alternating current，The 2 connection electric capacity C2 and inductance L1 of rectifier bridge T，The other end of inductance L1 connects electric capacity C3、Resistance R3 and the colelctor electrode of audion V1，The base stage of the other end connecting triode V1 of resistance R3、The colelctor electrode of audion V2 and the anode of unidirectional thyristor Q1，The other end of electric capacity C2 connects the port 4 of inductance L2 and rectifier bridge T，The other end of inductance L2 connects resistance R5、Resistance R6 and the other end of electric capacity C3，The negative electrode of unidirectional thyristor Q1 connects resistance R4、The other end of resistance R6、Electric capacity C4 and the other end of load A，Unidirectional thyristor Q1 controls the other end that pole connects resistance R4，The base stage of audion V2 connects the other end of resistance R5、The other end of electric capacity C4 and one of potentiometer RP1 fixing end，The emitter stage of audion V1 connects the sliding end of potentiometer RP1、Another fixing end of potentiometer RP1 and the other end of load A.
As preferred version of the present utility model: described audion V1 is Darlington transistor.
Compared with prior art; the beneficial effects of the utility model are: power supply architecture is simple, components and parts are few for the protection of this utility model safety; utilize the on state characteristic of audion and IGCT; circuit is made to have the function of short-circuit protection and overvoltage protection; thus effectively protect electrical equipment and circuit; the most also there is harmonic restraining function, therefore there is diverse in function, advantage safe and reliable and easy to use.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of safety protection power supply.
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 safety protection power supply，Including resistance R1、Rectifier bridge T、Inductance L1 and audion V1，One end of described resistance R1 connects electric capacity C1 and 220V alternating current，The other end of resistance R1 connects the other end and the port 1 of rectifier bridge T of electric capacity C1，The port 3 of rectifier bridge T connects the other end of 220V alternating current，The 2 connection electric capacity C2 and inductance L1 of rectifier bridge T，The other end of inductance L1 connects electric capacity C3、Resistance R3 and the colelctor electrode of audion V1，The base stage of the other end connecting triode V1 of resistance R3、The colelctor electrode of audion V2 and the anode of unidirectional thyristor Q1，The other end of electric capacity C2 connects the port 4 of inductance L2 and rectifier bridge T，The other end of inductance L2 connects resistance R5、Resistance R6 and the other end of electric capacity C3，The negative electrode of unidirectional thyristor Q1 connects resistance R4、The other end of resistance R6、Electric capacity C4 and the other end of load A，Unidirectional thyristor Q1 controls the other end that pole connects resistance R4，The base stage of audion V2 connects the other end of resistance R5、The other end of electric capacity C4 and one of potentiometer RP1 fixing end，The emitter stage of audion V1 connects the sliding end of potentiometer RP1、Another fixing end of potentiometer RP1 and the other end of load A.
Audion V1 is Darlington transistor.
nullOperation principle of the present utility model is: 220V line voltage is after the capacitance-resistance voltage reduction circuit blood pressure lowering that resistance R1 and electric capacity C1 forms，Enter back into and rectifier bridge T carries out rectification，The DC voltage of port 2 output of rectifier bridge T enters by electric capacity C2、Electric capacity C3、In the pi type filter of inductance L1 and inductance L2 composition，Pi type filter is for eliminating the harmonic wave interference in civil power，Audion V1 and IGCT Q1 forms overvoltage crowbar，When running into load A overpressure situation，Voltage after resistance R4 dividing potential drop controls the conducting voltage of pole higher than unidirectional thyristor Q1，Unidirectional thyristor Q1 turns on，So that the base potential of audion V1 reduces，Audion V1 ends，Reach the purpose of overvoltage protection，Audion V2 in circuit、Potentiometer RP1 and resistance R5 forms short-circuit protection circuit，When running into short-circuit conditions，Electric current increases，Voltage through potentiometer RP1 raises，The base potential making audion V2 rises，Audion V2 turns on，Again such that the base potential of audion V1 reduces，Audion V1 ends，Thus reach the purpose of short-circuit protection.
Claims (2)
- null1. a safety protection power supply，Including resistance R1、Rectifier bridge T、Inductance L1 and audion V1，It is characterized in that，One end of described resistance R1 connects electric capacity C1 and 220V alternating current，The other end of resistance R1 connects the other end and the port 1 of rectifier bridge T of electric capacity C1，The port 3 of rectifier bridge T connects the other end of 220V alternating current，The 2 connection electric capacity C2 and inductance L1 of rectifier bridge T，The other end of inductance L1 connects electric capacity C3、Resistance R3 and the colelctor electrode of audion V1，The base stage of the other end connecting triode V1 of resistance R3、The colelctor electrode of audion V2 and the anode of unidirectional thyristor Q1，The other end of electric capacity C2 connects the port 4 of inductance L2 and rectifier bridge T，The other end of inductance L2 connects resistance R5、Resistance R6 and the other end of electric capacity C3，The negative electrode of unidirectional thyristor Q1 connects resistance R4、The other end of resistance R6、Electric capacity C4 and the other end of load A，Unidirectional thyristor Q1 controls the other end that pole connects resistance R4，The base stage of audion V2 connects the other end of resistance R5、The other end of electric capacity C4 and one of potentiometer RP1 fixing end，The emitter stage of audion V1 connects the sliding end of potentiometer RP1、Another fixing end of potentiometer RP1 and the other end of load A.
- Safety the most according to claim 1 protection power supply, it is characterised in that described audion V1 is Darlington transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620191696.5U CN205489479U (en) | 2016-03-11 | 2016-03-11 | Low -cost safety protection power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620191696.5U CN205489479U (en) | 2016-03-11 | 2016-03-11 | Low -cost safety protection power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205489479U true CN205489479U (en) | 2016-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620191696.5U Expired - Fee Related CN205489479U (en) | 2016-03-11 | 2016-03-11 | Low -cost safety protection power |
Country Status (1)
| Country | Link |
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| CN (1) | CN205489479U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108895956A (en) * | 2018-04-04 | 2018-11-27 | 成都众宜天成科技有限公司 | It is a kind of can straight cutting alternating current operation paint coating thickness measuring instrument |
-
2016
- 2016-03-11 CN CN201620191696.5U patent/CN205489479U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108895956A (en) * | 2018-04-04 | 2018-11-27 | 成都众宜天成科技有限公司 | It is a kind of can straight cutting alternating current operation paint coating thickness measuring instrument |
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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: 20170311 |
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| CF01 | Termination of patent right due to non-payment of annual fee |