CN205544939U - Long -life DC power supply circuit - Google Patents
Long -life DC power supply circuit Download PDFInfo
- Publication number
- CN205544939U CN205544939U CN201620249377.5U CN201620249377U CN205544939U CN 205544939 U CN205544939 U CN 205544939U CN 201620249377 U CN201620249377 U CN 201620249377U CN 205544939 U CN205544939 U CN 205544939U
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- electric capacity
- relay
- connects
- resistance
- potentiometer
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Abstract
The utility model discloses a long -life DC power supply circuit, including unidirectional thyristor Q1, relay K1, potentiometre RP1 and resistance R1, 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, rectifier bridge T's 3 other ends of connecting the 220V alternating currents of port, rectifier bridge T's 2 connection inductance L1 and electric capacity C2 of port, inductance L1's other end connection electric capacity C3 and relay K1's contact K1 1. The utility model discloses long -life DC power supply circuit simple structure, components and parts are few, only use essential electronic component to form no chip structure to add filter module in the circuit, have stronger anti -interference ability, still still have simultaneously excessive pressure and under -voltage duplicate protection's function at the circuit, have consequently that the function is various, long service life and convenient to use's an advantage.
Description
Technical field
This utility model relates to a kind of power circuit, specifically a kind of long-life 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 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 long-life 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 long-life DC power supply circuit，Including unidirectional thyristor Q1、Relay K 1、Potentiometer RP1 and resistance R1，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 port 2 of rectifier bridge T connects inductance L1 and electric capacity C2，The other end of inductance L1 connects electric capacity C3 and the contact K1-1 of relay K 1，The other end of the contact K1-1 of relay K 1 connects electric capacity C4、Resistance R3、The negative electrode of diode D1、Output voltage U1、Relay K 1 and relay K 2，The other end of relay K 1 connects the anode of unidirectional thyristor Q1，The negative electrode of unidirectional thyristor Q1 connects resistance R2，The other end of electric capacity C3 connects inductance L2 and the contact K2-1 of relay K 2，The other end of electric capacity C4 connects the other end of the contact K2-1 of relay K 2、The other end of resistance R2、Resistance R4、Electric capacity C5、Electric capacity C6、The fixing end of of potentiometer RP1、The sliding end of potentiometer RP1、The fixing end of of potentiometer RP2 and the sliding end of potentiometer RP2，Unidirectional thyristor Q1 controls the other end that pole connects electric capacity C5、The anode of diode D1 and another fixing end of potentiometer RP1，The other end of resistance R3 connects another fixing end of potentiometer RP2、The other end of electric capacity C6 and the base stage of audion V1，The colelctor electrode of audion V1 connects the other end of resistance R4，The emitter stage of audion V1 connects the other end of relay K 2.
As preferred version of the present utility model: described relay K 1 and relay K 2 are normally-closed contact relay.
Compared with prior art; the beneficial effects of the utility model are: this utility model long-life DC power supply circuit simple in construction, components and parts are few; basic electronic component is only used to form; chipless structure; and add filtration module in circuit; there is stronger interference free performance, the most also at circuit, also there is overvoltage and the function of under-voltage duplicate protection, therefore there is diverse in function, length in service life and advantage easy to use.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of long-life 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 long-life DC power supply circuit，Including unidirectional thyristor Q1、Relay K 1、Potentiometer RP1 and resistance R1，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 port 2 of rectifier bridge T connects inductance L1 and electric capacity C2，The other end of inductance L1 connects electric capacity C3 and the contact K1-1 of relay K 1，The other end of the contact K1-1 of relay K 1 connects electric capacity C4、Resistance R3、The negative electrode of diode D1、Output voltage U1、Relay K 1 and relay K 2，The other end of relay K 1 connects the anode of unidirectional thyristor Q1，The negative electrode of unidirectional thyristor Q1 connects resistance R2，The other end of electric capacity C3 connects inductance L2 and the contact K2-1 of relay K 2，The other end of electric capacity C4 connects the other end of the contact K2-1 of relay K 2、The other end of resistance R2、Resistance R4、Electric capacity C5、Electric capacity C6、The fixing end of of potentiometer RP1、The sliding end of potentiometer RP1、The fixing end of of potentiometer RP2 and the sliding end of potentiometer RP2，Unidirectional thyristor Q1 controls the other end that pole connects electric capacity C5、The anode of diode D1 and another fixing end of potentiometer RP1，The other end of resistance R3 connects another fixing end of potentiometer RP2、The other end of electric capacity C6 and the base stage of audion V1，The colelctor electrode of audion V1 connects the other end of resistance R4，The emitter stage of audion V1 connects the other end of relay K 2.
Relay K 1 and relay K 2 are normally-closed contact relay.
nullOperation principle of the present utility model is: 220V line voltage is after the resistance-capacitance type reduction voltage circuit blood pressure lowering that resistance R1 and electric capacity C1 forms，Rectification is carried out again in rectifier bridge T，The DC voltage exported from the port 2 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 can eliminate mains harmonics interference，Unidirectional thyristor Q1 in circuit、Relay K 1、Diode D1 and potentiometer RP1 forms overvoltage detection circuit，Under normal circumstances，Q1 is not turned on，K1-1 is in attracting state，When running into overpressure situation，By the voltage after diode D1 and potentiometer RP1 dividing potential drop, unidirectional thyristor Q1 is turned on，Relay K 1 turns on，Its contact K1-1 disconnects，Protection load，Audion V1 in circuit、Relay K 2、Resistance R3 and potentiometer RP2 forms under-voltage protecting circuit，When voltage is normal，The base stage of audion V1 obtains electric，Audion V1 is not turned on，The contact K2-1 adhesive of relay K 2，When running into undervoltage condition，The base voltage of audion V1 must not electricity，Audion V1 turns on，Relay K 2 adhesive，K2-1 disconnects，Protection load.
Claims (2)
- null1. a long-life DC power supply circuit，Including unidirectional thyristor Q1、Relay K 1、Potentiometer RP1 and resistance R1，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 port 2 of rectifier bridge T connects inductance L1 and electric capacity C2，The other end of inductance L1 connects electric capacity C3 and the contact K1-1 of relay K 1，The other end of the contact K1-1 of relay K 1 connects electric capacity C4、Resistance R3、The negative electrode of diode D1、Output voltage U1、Relay K 1 and relay K 2，The other end of relay K 1 connects the anode of unidirectional thyristor Q1，The negative electrode of unidirectional thyristor Q1 connects resistance R2，The other end of electric capacity C3 connects inductance L2 and the contact K2-1 of relay K 2，The other end of electric capacity C4 connects the other end of the contact K2-1 of relay K 2、The other end of resistance R2、Resistance R4、Electric capacity C5、Electric capacity C6、The fixing end of of potentiometer RP1、The sliding end of potentiometer RP1、The fixing end of of potentiometer RP2 and the sliding end of potentiometer RP2，Unidirectional thyristor Q1 controls the other end that pole connects electric capacity C5、The anode of diode D1 and another fixing end of potentiometer RP1，The other end of resistance R3 connects another fixing end of potentiometer RP2、The other end of electric capacity C6 and the base stage of audion V1，The colelctor electrode of audion V1 connects the other end of resistance R4，The emitter stage of audion V1 connects the other end of relay K 2.
- Long-life DC power supply circuit the most according to claim 1, it is characterised in that described relay K 1 and relay K 2 are normally-closed contact relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620249377.5U CN205544939U (en) | 2016-03-25 | 2016-03-25 | Long -life DC power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620249377.5U CN205544939U (en) | 2016-03-25 | 2016-03-25 | Long -life DC power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205544939U true CN205544939U (en) | 2016-08-31 |
Family
ID=56786637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620249377.5U Expired - Fee Related CN205544939U (en) | 2016-03-25 | 2016-03-25 | Long -life DC power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205544939U (en) |
-
2016
- 2016-03-25 CN CN201620249377.5U patent/CN205544939U/en not_active Expired - Fee Related
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 Termination date: 20170325 |