CN204145322U - A kind of power-switching circuit - Google Patents
A kind of power-switching circuit Download PDFInfo
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- CN204145322U CN204145322U CN201420594925.9U CN201420594925U CN204145322U CN 204145322 U CN204145322 U CN 204145322U CN 201420594925 U CN201420594925 U CN 201420594925U CN 204145322 U CN204145322 U CN 204145322U
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Abstract
The utility model discloses a kind of power-switching circuit, comprise the first resistance, the second resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the first diode, the second diode, the 3rd diode, triode and metal-oxide-semiconductor, the first input end of described power-switching circuit is connected civil power with the second input; The anode of described second diode connects described first input end, and negative electrode connects the grid of described metal-oxide-semiconductor by described second resistance; The base stage of described triode connects the end that connects of described first resistance and the first electric capacity, and collector electrode connects the grid of described metal-oxide-semiconductor, and emitter connects the second input and second output of described power-switching circuit; Described 3rd electric capacity one end connects the source electrode of described metal-oxide-semiconductor, and the other end connects the emitter of described triode; Described first diode and described first Capacitance parallel connection.Civil power directly transforms and exports by this practical information, and supply power consumption equipment, without the need to using transformer isolation.
Description
Technical field
The utility model relates to electronic circuit field, particularly relates to a kind of power-switching circuit.
Background technology
Civil power i.e. our said industrial-frequency alternating current (AC), conventional three amounts of alternating current characterize: voltage, electric current, frequency.Whole world civil power has not identical voltage standard, and China is generally 220V (volt).At present, generally by transformer, civil power and various electric equipment are isolated.Like this, very large cost is added undoubtedly.
Utility model content
The purpose of this utility model is to provide a kind of power-switching circuit, is directly transformed by civil power and exports, and supply power consumption equipment, without the need to using transformer isolation.
The technical scheme realizing above-mentioned purpose is:
A kind of power-switching circuit, external civil power, comprises the first resistance, the second resistance, the first electric capacity, the second electric capacity, the 3rd electric capacity, the first diode, the second diode, the 3rd diode, triode and metal-oxide-semiconductor, wherein:
The first input end of described power-switching circuit is connected civil power with the second input;
One end of described first resistance connects described first input end, and the other end connects described second input by described first electric capacity;
The anode of described second diode connects described first input end, and negative electrode connects the grid of described metal-oxide-semiconductor by described second resistance;
The anode of described 3rd diode connects described first input end, and negative electrode connects the drain electrode of described metal-oxide-semiconductor;
The source electrode of described metal-oxide-semiconductor connects the first output of described power-switching circuit;
One end of described second electric capacity connects the grid of described metal-oxide-semiconductor, and the other end connects described second input;
The base stage of described triode connects the end that connects of described first resistance and the first electric capacity, and collector electrode connects the grid of described metal-oxide-semiconductor, and emitter connects the second input and second output of described power-switching circuit;
Described 3rd electric capacity one end connects the source electrode of described metal-oxide-semiconductor, and the other end connects the emitter of described triode;
Described first diode and described first Capacitance parallel connection.
The beneficial effects of the utility model are: the utility model, without the need to using transformer isolation, directly connects civil power, have effectively saved cost.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of the power-switching circuit of a kind of execution mode of the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Refer to Fig. 1, power-switching circuit of the present utility model, comprise the first resistance R1, the second resistance R2, the first electric capacity C1, the second electric capacity C2, the 3rd electric capacity C3, the first diode D1, the second diode D2, the 3rd diode D3, triode Q1 and metal-oxide-semiconductor Q2, wherein:
Power-switching circuit is containing first input end In+, the second input In-, the first output Out+ and the second output Out-.
First input end In+ and the second input In-accesses civil power.
One end of first resistance R1 connects first input end In+, and the other end connects the second input In-by the first electric capacity C1.
First diode D1 is in parallel with the first electric capacity C1, for the first electric capacity C1 discharge and recharge.
The anode of the second diode D2 connects first input end In+, and negative electrode connects the grid of metal-oxide-semiconductor Q2 by the second resistance R2.
The anode of the 3rd diode D3 connects first input end In+, and negative electrode connects the drain electrode of metal-oxide-semiconductor Q2; The source electrode of metal-oxide-semiconductor Q2 connects the first output Out+.
One end of second electric capacity C2 connects the grid of metal-oxide-semiconductor Q2, and the other end connects the second input In-.
The base stage of triode Q1 connects the end that connects of the first resistance R1 and the first electric capacity C1, and collector electrode connects the grid of metal-oxide-semiconductor Q2, and emitter connects the second input In-and the second output Out-.
3rd electric capacity C3 one end connects the source electrode of metal-oxide-semiconductor Q2, the emitter of other end connecting triode Q1.First output Out+ and the second output Out-connecting circuit equipment.
Operation principle of the present utility model:
Civil power, after the second diode D2 rectification, through the filter circuit filtering that the second resistance R2 and the second electric capacity C2 forms, then supplies the grid of metal-oxide-semiconductor Q2 and the collector electrode of triode Q1.By arranging the resistance of the first resistance R1 and the second resistance R2, make the starting stage at the positive half cycle of alternating current, triode Q1 turns off, metal-oxide-semiconductor Q2 conducting, charges to the 3rd electric capacity C3 at this one-phase.Then, when the voltage in triode Q1 base stage reaches its conducting voltage, triode Q1 conducting, thus metal-oxide-semiconductor Q2 is turned off, so stop the charging of the 3rd electric capacity C3.At the negative half period of alternating current, due to the existence of the 3rd diode D3, the negative half period of alternating current can not charge to the 3rd electric capacity C3.So, finally can produce smoother VD at the 3rd electric capacity C3 two ends.
Claims (1)
1. a power-switching circuit, external civil power, it is characterized in that, comprise the first resistance (R1), the second resistance (R2), the first electric capacity (C1), the second electric capacity (C2), the 3rd electric capacity (C3), the first diode (D1), the second diode (D2), the 3rd diode (D3), triode (Q1) and metal-oxide-semiconductor (Q2), wherein:
The first input end of described power-switching circuit is connected civil power with the second input;
One end of described first resistance (R1) connects described first input end, and the other end connects described second input by described first electric capacity (C1);
The anode of described second diode (D2) connects described first input end, and negative electrode connects the grid of described metal-oxide-semiconductor (Q2) by described second resistance (R2);
The anode of described 3rd diode (D3) connects described first input end, and negative electrode connects the drain electrode of described metal-oxide-semiconductor (Q2);
The source electrode of described metal-oxide-semiconductor (Q2) connects the first output of described power-switching circuit;
One end of described second electric capacity (C2) connects the grid of described metal-oxide-semiconductor (Q2), and the other end connects described second input;
The base stage of described triode (Q1) connects the end that connects of described first resistance (R1) and the first electric capacity (C1), collector electrode connects the grid of described metal-oxide-semiconductor (Q2), and emitter connects the second input and second output of described power-switching circuit;
Described 3rd electric capacity (C3) one end connects the source electrode of described metal-oxide-semiconductor (Q2), and the other end connects the emitter of described triode (Q1);
Described first diode (D1) is in parallel with described first electric capacity (C1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420594925.9U CN204145322U (en) | 2014-10-14 | 2014-10-14 | A kind of power-switching circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420594925.9U CN204145322U (en) | 2014-10-14 | 2014-10-14 | A kind of power-switching circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204145322U true CN204145322U (en) | 2015-02-04 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420594925.9U Expired - Fee Related CN204145322U (en) | 2014-10-14 | 2014-10-14 | A kind of power-switching circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204145322U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199583A (en) * | 2018-01-03 | 2018-06-22 | 广州爱易学智能信息科技有限公司 | Library management system |
-
2014
- 2014-10-14 CN CN201420594925.9U patent/CN204145322U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108199583A (en) * | 2018-01-03 | 2018-06-22 | 广州爱易学智能信息科技有限公司 | Library management system |
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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: 20150204 Termination date: 20161014 |