CN202997528U - Simple alternating-current rectification protection power supply device with under-voltage protection function - Google Patents
Simple alternating-current rectification protection power supply device with under-voltage protection function Download PDFInfo
- Publication number
- CN202997528U CN202997528U CN 201220699935 CN201220699935U CN202997528U CN 202997528 U CN202997528 U CN 202997528U CN 201220699935 CN201220699935 CN 201220699935 CN 201220699935 U CN201220699935 U CN 201220699935U CN 202997528 U CN202997528 U CN 202997528U
- Authority
- CN
- China
- Prior art keywords
- pin
- connect
- resistance
- effect transistor
- rectifier bridge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Abstract
The utility model relates to a simple alternating-current rectification protection power supply device with under-voltage protection function. An alternating-current power supply is connected with a primary side of a transformer; a secondary side of the transformer is connected with both ends of a piezoresistor as well as a first pin and a third pin of a rectifier bridge; a second pin of the rectifier bridge is connected with one end of a thin-film capacitor, the positive pole of a second electrolytic capacitor, the cathode of a voltage stabilizing diode and a pin of a second resistor; a fourth pin of the rectifier bridge is connected with the other end of the thin-film capacitor, the negative pole of the second electrolytic capacitor, a pin of a third resistor, the negative pole of a third electrolytic capacitor and a pin of a fourth piezoresistor to form a GND pole of the circuit; the other pin of the third resistor is connected with the anode of the voltage stabilizing diode and the gate of a field-effect transistor; the other end of the second resistor is connected with the drain of the field-effect transistor; and the source of the field-effect transistor is connected with the positive pole of the third electrolytic capacitor and the other side of the fourth piezoresistor to form a VDD pole of the circuit. The circuit has the advantages of simple structure, low cost, stable and reliable under-voltage protection function and less energy consumption and has the characteristics of low cost, stable function, high efficiency and the like.
Description
Technical field
The utility model belongs to a kind of power circuit, particularly relates to a kind of easily with the AC rectification protection power source device of under-voltage protection.
Background technology
Along with electronic technology is widely used in rapidly in various fields, various electric equipment products are more and more general, and become gradually the main flow in present various field.Yet all electric equipment products all need to use power supply, and quite most electric elements needs DC power supply, especially the DC power supply of stable performance.Because the development trend of present electric equipment products is that so present electric equipment products volume is more and more less, function from strength to strength toward simplicity, integrated, intelligent, compact, low carbonization development.Yet its requirement to the stability of power supply is also more and more higher.Well-knownly be, most of electric equipment products still can work on lower than its nominal operation supply voltage the time sometimes, but this moment, operating state was very unstable, and function very easily lost efficacy, and need corresponding protective circuit to the under-voltage conservation treatment that carries out.
Summary of the invention
The utility model for solve the technical problem that exists in known technology provide a kind of simple in structure, volume is small and exquisite easily with the AC rectification protection power source device of under-voltage protection.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is: it includes transformer (T1), first, fourth piezo-resistance (R1, R4), rectifier bridge (D1), thin-film capacitor (C1), second and third electrochemical capacitor (C2, C3), voltage stabilizing didoe (D2), second and third resistance (R2, R3), N channel enhancement field effect transistor (Q1); AC power connects the primary side of described transformer (T1), the described piezo-resistance of secondary side joint (R1) two ends of described transformer (T1), connect 1 pin and 3 pin of described rectifier bridge (D1), 2 pin of described rectifier bridge (D1) connect an end of described thin-film capacitor (C1), connect the positive pole of described the second electrochemical capacitor (C2), connect the negative electrode of described voltage stabilizing didoe (D2), connect a pin of described the second resistance (R2); 4 pin of described rectifier bridge (D1) connect the other end of described the second thin-film capacitor (C2), connect the negative pole of described the second electrochemical capacitor (C2), connect a pin of described the 3rd resistance (R3), connect the negative pole of described the 3rd electrochemical capacitor (C3), connect a pin of described the 4th piezo-resistance (R4), as the gnd electrode of this circuit; Another pin of the 3rd resistance (R3) connects the anode of described voltage stabilizing didoe (D2), connect the grid of described field effect transistor (Q1), the drain electrode of the described field effect transistor of another termination (Q1) of the second resistance (R2), the source contact of described field effect transistor (Q1) connects the positive pole of described the 3rd electrochemical capacitor (C3), connect the other end of described the 4th piezo-resistance (R4), as the VDD utmost point of this circuit.
Advantage and the good effect that the utlity model has are: circuit structure is simple, and cost is lower, and under-voltage protection function is reliable and stable, and circuit itself uses little energy, has realized that cost is low, and function is steady, the efficient high.When guaranteeing the reliable and stable work of under-voltage protection function, improved the utilance of electric energy.
Description of drawings
Fig. 1 is electrical schematic diagram of the present utility model.
Embodiment
For further understanding summary of the invention of the present utility model, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
As shown in Figure 1, AC power connects the primary side of transformer T1, the secondary side joint piezo-resistance R1 two ends of transformer T1, connect 1 pin and 3 pin of rectifier bridge D1,2 pin of rectifier bridge D1 connect the end of thin-film capacitor C1, connect the positive pole of electrochemical capacitor C2, connect the negative electrode of voltage stabilizing didoe D2, the pin of connecting resistance R2; 4 pin of rectifier bridge D1 connect the other end of thin-film capacitor C2, connect the negative pole of electrochemical capacitor C2, and the pin of connecting resistance R3 connects the negative pole of electrochemical capacitor C3, connects the pin of piezo-resistance R4, as the gnd electrode of this circuit.Another pin of resistance R 3 connects the anode of voltage stabilizing didoe D2, connect the grid of field effect transistor Q1, the drain electrode of another termination field effect transistor Q1 of resistance R 2, the source contact of field effect transistor Q1 connects the positive pole of electrochemical capacitor C3, connect the other end of piezo-resistance R4, as the VDD utmost point of this circuit.
Its operation principle is as follows:
Under normal circumstances, AC power after the conversion of transformer T1, then through after arranging bridge D1 rectification, capacitor C 1, the direct voltage at C2 two ends is the direct voltage size that need to export of this power circuit just.This direct voltage makes field effect transistor Q1 conducting less times greater than the puncture voltage of voltage stabilizing didoe D2 and the grid cut-in voltage sum of field effect transistor Q1, makes electric current pass through field effect transistor Q1, and this circuit just can have been exported the direct voltage of needs.
When AC supply voltage reduced, the secondary side voltage of transformer T1 decreased, after the arrangement of rectifier bridge D1, and capacitor C 1, the direct voltage at C2 two ends also decreases.At this moment, capacitor C 1, the direct voltage at C2 two ends is less than the puncture voltage of voltage stabilizing didoe D2 and the grid cut-in voltage sum of field effect transistor Q1, make field effect transistor Q1 turn-off, close the electric current output of this circuit, made under-voltage DC power supply can not arrive output, avoided electrical appliance to work under under-voltage condition, the phenomenon of disabler has guaranteed the reliability of the function of electrical appliance.
Claims (1)
1. one kind easily with the AC rectification protection power source device of under-voltage protection, it is characterized in that: it includes transformer (T1), first, fourth piezo-resistance (R1, R4), rectifier bridge (D1), thin-film capacitor (C1), second and third electrochemical capacitor (C2, C3), voltage stabilizing didoe (D2), second and third resistance (R2, R3), N channel enhancement field effect transistor (Q1); AC power connects the primary side of described transformer (T1), the described piezo-resistance of secondary side joint (R1) two ends of described transformer (T1), connect 1 pin and 3 pin of described rectifier bridge (D1), 2 pin of described rectifier bridge (D1) connect an end of described thin-film capacitor (C1), connect the positive pole of described the second electrochemical capacitor (C2), connect the negative electrode of described voltage stabilizing didoe (D2), connect a pin of described the second resistance (R2); 4 pin of described rectifier bridge (D1) connect the other end of described the second thin-film capacitor (C2), connect the negative pole of described the second electrochemical capacitor (C2), connect a pin of described the 3rd resistance (R3), connect the negative pole of described the 3rd electrochemical capacitor (C3), connect a pin of described the 4th piezo-resistance (R4), as the gnd electrode of this circuit; Another pin of the 3rd resistance (R3) connects the anode of described voltage stabilizing didoe (D2), connect the grid of described field effect transistor (Q1), the drain electrode of the described field effect transistor of another termination (Q1) of the second resistance (R2), the source contact of described field effect transistor (Q1) connects the positive pole of described the 3rd electrochemical capacitor (C3), connect the other end of described the 4th piezo-resistance (R4), as the VDD utmost point of this circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220699935 CN202997528U (en) | 2012-12-18 | 2012-12-18 | Simple alternating-current rectification protection power supply device with under-voltage protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220699935 CN202997528U (en) | 2012-12-18 | 2012-12-18 | Simple alternating-current rectification protection power supply device with under-voltage protection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202997528U true CN202997528U (en) | 2013-06-12 |
Family
ID=48568660
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220699935 Expired - Lifetime CN202997528U (en) | 2012-12-18 | 2012-12-18 | Simple alternating-current rectification protection power supply device with under-voltage protection function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202997528U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634644A (en) * | 2017-10-31 | 2018-01-26 | 无锡汉神电气股份有限公司 | A kind of surge mu balanced circuit |
-
2012
- 2012-12-18 CN CN 201220699935 patent/CN202997528U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634644A (en) * | 2017-10-31 | 2018-01-26 | 无锡汉神电气股份有限公司 | A kind of surge mu balanced circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204758699U (en) | A insulating impedance detection circuitry for photovoltaic inverter | |
| CN204761146U (en) | Bimodulus power supply | |
| CN104135043B (en) | A kind of two-stage safeguard protection feedback control charger | |
| CN202997528U (en) | Simple alternating-current rectification protection power supply device with under-voltage protection function | |
| CN204392101U (en) | AC/DC circuit and switching power supply | |
| CN203734382U (en) | High voltage CT self-power hardware platform | |
| CN203103926U (en) | Switching power supply and protective circuit thereof | |
| CN204465023U (en) | Micro Energy Lose high pressure power-supply circuit | |
| CN206498338U (en) | Modified Switching Power Supply input circuit | |
| CN203205871U (en) | Direct current reverse protection circuit | |
| CN202488366U (en) | Energy-saving ultra-small switch power supply for plug and socket with electronic circuit | |
| CN201918776U (en) | Simple CC charger | |
| CN206250963U (en) | A kind of highly reliable power supply circuit | |
| CN202135070U (en) | Dual-voltage capacitance-resistance voltage-reduction energy saving circuit | |
| CN201904722U (en) | Improved BUCK circuit | |
| CN204615684U (en) | The power module of three-phase alternating current input and air conditioner | |
| CN205750611U (en) | A kind of regulator control circuit | |
| CN203180778U (en) | Double-forward converter circuit | |
| CN204559105U (en) | A kind of switch power module protection circuit against input over-voltage | |
| CN204425182U (en) | Single tube pfc circuit and power module | |
| CN203084040U (en) | Low-power single-phase electronic type multi-rate meter | |
| CN204835677U (en) | Battery charging circuit that connects in parallel | |
| CN204012794U (en) | Two-stage safeguard protection FEEDBACK CONTROL charger | |
| CN202160120U (en) | Divided voltage type regulated power supply circuit | |
| CN202364142U (en) | Simple DC stabilized power supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130612 |
|
| CX01 | Expiry of patent term |