CN204481703U - A kind of AC-DC change-over circuit - Google Patents
A kind of AC-DC change-over circuit Download PDFInfo
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- CN204481703U CN204481703U CN201520221392.4U CN201520221392U CN204481703U CN 204481703 U CN204481703 U CN 204481703U CN 201520221392 U CN201520221392 U CN 201520221392U CN 204481703 U CN204481703 U CN 204481703U
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Abstract
The utility model discloses a kind of AC-DC change-over circuit, comprise transformer T, switch S, electric capacity C1, resistance R1, one-way SCR VS1 and one-way SCR VS2.Operation principle of the present utility model is: when input ac voltage is 110 ~ 170V, the charging voltage of electric capacity C4 is lower than the burning voltage of voltage stabilizing didoe D3, one-way SCR VS2 turns off, one-way SCR VS1 is by diode D2 and resistance R3 triggering and conducting, in addition, diode D1 is had with one-way SCR VS1 reverse parallel connection, so the voltage doubling rectifing circuit of rear class normally works, when input voltage is 170 ~ 240V, the charging voltage of electric capacity C4 is higher than the burning voltage of voltage stabilizing didoe D3, one-way SCR VS2 triggering and conducting, result, the gate pole no current circulation of one-way SCR VS1, keep off state.Rear class voltage-multiplying circuit becomes half-wave rectifying circuit.During such load open circuit, export direct current during input AC 110 ~ 170V voltage and be about 280V, the output dc voltage of input AC 220V is about 290V, under both of these case, the direct voltage being added to rear class voltage stabilizing circuit is about 280V, namely automatically completes the switching of voltage.
Description
Technical field
The utility model relates to a kind of change-over circuit, specifically a kind of AC-DC change-over circuit.
Background technology
AC-DC change-over circuit all can be used in a lot of power equipment, but a lot of AC-DC change-over circuit all needs for power consumption equipment designs especially, to meet conversion requirements, very loaded down with trivial details, and greatly improves human cost.
Utility model content
The purpose of this utility model is the AC-DC change-over circuit providing a kind of transformation range large, to solve the problem proposed in above-mentioned background technology.
For achieving the above object, the utility model provides following technical scheme:
A kind of AC-DC change-over circuit, comprises transformer T, switch S, electric capacity C1, resistance R1, one-way SCR VS1 and one-way SCR VS2, described switch S one end connects alternating current U1 one end, the switch S other end is connection transformer T coil L1 and electric capacity C1 respectively, the electric capacity C1 other end connects the alternating current U1 other end and transformer T coil L2 respectively, and the transformer T coil L2 other end is contact resistance R8 respectively, electric capacity C2, diode D4 positive pole, ground capacity C6 and electric capacity C5, the electric capacity C2 other end is connection transformer T coil L1 respectively, the resistance R8 other end and resistance R1, the resistance R1 other end is contact resistance R2 respectively, diode D1 positive pole, the K pole of one-way SCR VS1, resistance R3, the K pole of one-way SCR VS2, resistance R4, resistance R5 and electric capacity C4, the electric capacity C4 other end is contact resistance R5 respectively, diode D3 negative pole and resistance R6, the resistance R6 other end connects diode D4 negative pole, the G pole of the described diode D3 positive pole difference contact resistance R4 other end and one-way SCR VS2, the A pole of one-way SCR VS2 connects diode D2 positive pole and resistance R7 respectively, and the resistance R7 other end connects electric capacity C3 respectively, diode D1 negative pole, the A pole of one-way SCR VS1, ground connection diode D5 negative pole and diode D6 positive pole, the G pole contact resistance R3 other end and the diode D2 negative pole respectively of one-way SCR VS1, described diode D6 negative pole connects the electric capacity C5 other end and DC output end U2 respectively.
As the utility model further scheme: described alternating current U1 voltage is 110 ~ 240V.
Compared with prior art, the beneficial effects of the utility model are: the alternating voltage between 110 ~ 240V all can be converted into about 280V voltage and export by the utility model, much different electrical power demand can be met, saved human cost, be applicable to very much promoting the use of.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of AC-DC change-over circuit.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, in the utility model embodiment, a kind of AC-DC change-over circuit, comprises transformer T, switch S, electric capacity C1, resistance R1, one-way SCR VS1 and one-way SCR VS2, switch S one end connects alternating current U1 one end, the switch S other end is connection transformer T coil L1 and electric capacity C1 respectively, the electric capacity C1 other end connects the alternating current U1 other end and transformer T coil L2 respectively, and the transformer T coil L2 other end is contact resistance R8 respectively, electric capacity C2, diode D4 positive pole, ground capacity C6 and electric capacity C5, the electric capacity C2 other end is connection transformer T coil L1 respectively, the resistance R8 other end and resistance R1, the resistance R1 other end is contact resistance R2 respectively, diode D1 positive pole, the K pole of one-way SCR VS1, resistance R3, the K pole of one-way SCR VS2, resistance R4, resistance R5 and electric capacity C4, the electric capacity C4 other end is contact resistance R5 respectively, diode D3 negative pole and resistance R6, the resistance R6 other end connects diode D4 negative pole, the G pole of the diode D3 positive pole difference contact resistance R4 other end and one-way SCR VS2, the A pole of one-way SCR VS2 connects diode D2 positive pole and resistance R7 respectively, and the resistance R7 other end connects electric capacity C3 respectively, diode D1 negative pole, the A pole of one-way SCR VS1, ground connection diode D5 negative pole and diode D6 positive pole, the G pole contact resistance R3 other end and the diode D2 negative pole respectively of one-way SCR VS1, diode D6 negative pole connects the electric capacity C5 other end and DC output end U2 respectively.
Alternating current U1 voltage is 110 ~ 240V.
Operation principle of the present utility model is: when input ac voltage is 110 ~ 170V, the charging voltage of electric capacity C4 is lower than the burning voltage of voltage stabilizing didoe D3, one-way SCR VS2 turns off, one-way SCR VS1 is by diode D2 and resistance R3 triggering and conducting, in addition, diode D1 is had with one-way SCR VS1 reverse parallel connection, so the voltage doubling rectifing circuit of rear class normally works, when input voltage is 170 ~ 240V, the charging voltage of electric capacity C4 is higher than the burning voltage of voltage stabilizing didoe D3, one-way SCR VS2 triggering and conducting, result, the gate pole no current circulation of one-way SCR VS1, keep off state.Rear class voltage-multiplying circuit becomes half-wave rectifying circuit.During such load open circuit, export direct current during input AC 110 ~ 170V voltage and be about 280V, the output dc voltage of input AC 220V is about 290V, under both of these case, the direct voltage being added to rear class voltage stabilizing circuit is about 280V, namely automatically completes the switching of voltage.
Claims (2)
1. an AC-DC change-over circuit, comprises transformer T, switch S, electric capacity C1, resistance R1, one-way SCR VS1 and one-way SCR VS2, it is characterized in that, described switch S one end connects alternating current U1 one end, the switch S other end is connection transformer T coil L1 and electric capacity C1 respectively, the electric capacity C1 other end connects the alternating current U1 other end and transformer T coil L2 respectively, and the transformer T coil L2 other end is contact resistance R8 respectively, electric capacity C2, diode D4 positive pole, ground capacity C6 and electric capacity C5, the electric capacity C2 other end is connection transformer T coil L1 respectively, the resistance R8 other end and resistance R1, the resistance R1 other end is contact resistance R2 respectively, diode D1 positive pole, the K pole of one-way SCR VS1, resistance R3, the K pole of one-way SCR VS2, resistance R4, resistance R5 and electric capacity C4, the electric capacity C4 other end is contact resistance R5 respectively, diode D3 negative pole and resistance R6, the resistance R6 other end connects diode D4 negative pole, the G pole of the described diode D3 positive pole difference contact resistance R4 other end and one-way SCR VS2, the A pole of one-way SCR VS2 connects diode D2 positive pole and resistance R7 respectively, and the resistance R7 other end connects electric capacity C3 respectively, diode D1 negative pole, the A pole of one-way SCR VS1, ground connection diode D5 negative pole and diode D6 positive pole, the G pole contact resistance R3 other end and the diode D2 negative pole respectively of one-way SCR VS1, described diode D6 negative pole connects the electric capacity C5 other end and DC output end U2 respectively.
2. AC-DC change-over circuit according to claim 1, is characterized in that, described alternating current U1 voltage is 110 ~ 240V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520221392.4U CN204481703U (en) | 2015-04-14 | 2015-04-14 | A kind of AC-DC change-over circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520221392.4U CN204481703U (en) | 2015-04-14 | 2015-04-14 | A kind of AC-DC change-over circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204481703U true CN204481703U (en) | 2015-07-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520221392.4U Expired - Fee Related CN204481703U (en) | 2015-04-14 | 2015-04-14 | A kind of AC-DC change-over circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN204481703U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107370607A (en) * | 2016-09-22 | 2017-11-21 | 淮阴师范学院 | A kind of network power supply electric control system |
| CN107707133A (en) * | 2017-10-31 | 2018-02-16 | 河南飞防兵科技有限公司 | A kind of electric power system applied to robot driving device |
-
2015
- 2015-04-14 CN CN201520221392.4U patent/CN204481703U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107370607A (en) * | 2016-09-22 | 2017-11-21 | 淮阴师范学院 | A kind of network power supply electric control system |
| CN107707133A (en) * | 2017-10-31 | 2018-02-16 | 河南飞防兵科技有限公司 | A kind of electric power system applied to robot driving device |
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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: 20150715 Termination date: 20160414 |