CN201830159U - Adjustable direct current stabilized power supply - Google Patents
Adjustable direct current stabilized power supply Download PDFInfo
- Publication number
- CN201830159U CN201830159U CN2010205554133U CN201020555413U CN201830159U CN 201830159 U CN201830159 U CN 201830159U CN 2010205554133 U CN2010205554133 U CN 2010205554133U CN 201020555413 U CN201020555413 U CN 201020555413U CN 201830159 U CN201830159 U CN 201830159U
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- terminal regulator
- power supply
- filter capacitor
- output
- direct current
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Abstract
The utility model relates to an adjustable direct current stabilized power supply belonging to the field of a power supply unit. The problem that the existing direct current stabilized power supply works unstably is mainly solved. The adjustable direct current stabilized power supply comprises a transformer, a bridge rectifier circuit and a filter capacitor (C1), wherein one end of the filter capacitor (C1) is connected with the input end of a three-terminal regulator, a feedback resistor (R1) is connected between the output end and the control end of the three-terminal regulator, a filter capacitor (C4) is connected at the output end of the three-terminal regulator, the output end of the bridge rectifier circuit is connected with a capacitor (C2), a parallel circuit is connected between the control end of the three-terminal regulator and the other end of the filter capacitor (C1), the parallel circuit is formed by an adjustable resistor (RP1) and a filter capacitor (C3), diodes (VD1) are connected at two ends of the resistor (R1), and a diode (VD2) is connected between the output end of the three-terminal regulator and the input end of the three-terminal regulator. The adjustable direct current stabilized power supply has the advantages that the performance is good, the working is stable, the volume is small, the installation is simple and the power supply is suitable for experiments.
Description
Technical field
The utility model relates to supply unit, particularly relates to a kind of adjustable D.C. regulated power supply.
Background technology
D.C. regulated power supply is widely used, and very convenient, power supply is provided for some electronic equipments, instrument and meter and small household appliances.Present D.C. regulated power supply, its structure are by transformer output low voltage voltage, the very big direct current of output ripple after bridge rectifier filtering.This D.C. regulated power supply is job insecurity not only, and circuit efficiency is lower, volume is big, cost is higher.
The utility model content
The utility model provides a kind of adjustable D.C. regulated power supply, and its performance is good, working stability, volume are little.
The technical solution of the utility model: the adjustable D.C. regulated power supply of this kind, comprise a transformer T, the filter capacitor C1 that is connected the bridge rectifier on the transformer T secondary coil and is connected the bridge rectifier output, the end of described filter capacitor C1 also is connected with the input of a three terminal regulator IC, between the output of this three terminal regulator IC and control end, be connected with feedback resistance R1, output at three terminal regulator IC also is connected with another filter capacitor C4, also be connected with a capacitor C 2 at described bridge rectifier output, it is characterized in that, connect a parallel circuits between the other end of the control end of described three terminal regulator IC and filter capacitor C1, described parallel circuits is made up of adjustable resistance RP1 and filter capacitor C3; The two ends of described resistance R 1 are connected with a diode VD1, are connected with a diode VD2 between the output of described three terminal regulator IC and the input.
The beneficial effects of the utility model are: it utilizes adjustable three terminal regulator, and characteristics are that performance is good, working stability, volume is little, fabrication and installation are simple and convenient, is fit to do the experiment power supply.
Description of drawings
Fig. 1 is circuit figure of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing 1.
In the embodiment that accompanying drawing 1 provides, transformer T selects elementary input 220V for use, the miniature transformer of secondary output 28V, at the transformer T secondary coil output diode D1 that to be connected with by 4 models be 2CZ33, D2, D3, the bridge rectifier that D4 forms, be connected with the filter capacitor C1 of one 2200 μ F/50V at the output of bridge rectifier, input (IN pin) at positive pole one end of this filter capacitor C1 and the model three terminal regulator IC that is LM317 is connected, be connected with the feedback resistance R1 of one 100 Ω between the output of this three terminal regulator IC (OUT pin) and the control end (ADJ pin), output at three terminal regulator IC also is connected with the filter capacitor C4 that a specification is 100 μ F/50V, output at bridge rectifier also is connected with one 0.33 μ F capacitor C 2, adjustable resistance RP1 of series connection between the other end of the control end of three terminal regulator IC and filter capacitor C1 by 5.1K Ω, the parallel circuits that the filter capacitor C3 that this adjustable resistance RP1 and specification are 10 μ F/50V forms, the diode VD1 that to be connected with a model at the two ends of resistance R 1 be IN4002, the diode VD2 that to be connected with a model between the output of three terminal regulator IC and input be IN4002.
Three terminal regulator LM317 output current is 1.5A, output voltage can be regulated between 1.25-37V continuously, its output voltage is by outer meeting resistance R1 and adjustable resistance RP1 decision, output and the voltage difference of adjusting between the end are 1.25V, this voltage will produce several milliamperes electric current, to ground, the voltage of getting on adjustable resistance RP1 is added to adjusts end, just can change output voltage by changing adjustable resistance RP1 through resistance R 1, adjustable resistance RP1.C2 is used for preventing that the input of three terminal regulator LM317 from producing self-oscillation.Filter capacitor C3 is used for the ripple on the filtering adjustable resistance RP1, improves the stability of electric power output voltage.For a certain reason when the output of three terminal regulator LM317 and input short circuit; capacitor C 2 can be passed through the LM317 internal discharge and defective chip; diode VD1 is the protection diode; can be capacitor C 2 discharge loop is provided; prevent the output end of voltage stabilizer short circuit and damage three terminal regulator LM317 that diode VD2 is used to prevent to import short circuit and damages three terminal regulator LM317.
The utility model has utilized adjustable three terminal regulator LM317, is characterized in that performance is good, working stability, volume is little, fabrication and installation are simple and convenient, and maximum output current is 1.5A, and output voltage is adjustable continuously between 1.25～37V.In order to guarantee the LM317 reliably working, the resistance of R1 is generally got 100 Ω, and output voltage V o expression formula is: the V of Vo=1.25 * (1+R2/Rp).Its most suitable experiment power supply of doing.
In order to obtain stable output voltage, the electric current of the resistance R of flowing through 1 is less than 3.5mA.Capacitor C 2 should be near the input of three terminal regulator LM317 during installation, and filter capacitor C3 should can suppress ripple so better near the output of three terminal regulator LM317.
Claims (1)
1. adjustable D.C. regulated power supply, comprise a transformer (T), the filter capacitor (C1) that is connected the bridge rectifier on transformer (T) secondary coil and is connected the bridge rectifier output, one end of described filter capacitor (C1) also is connected with the input of a three terminal regulator (IC), between the output of this three terminal regulator (IC) and control end, be connected with feedback resistance (R1), output at three terminal regulator (IC) also is connected with another filter capacitor (C4), also be connected with an electric capacity (C2) at described bridge rectifier output, it is characterized in that, connect a parallel circuits between the other end of the control end of described three terminal regulator (IC) and filter capacitor (C1), described parallel circuits is made up of adjustable resistance (RP1) and filter capacitor (C3); The two ends of described resistance (R1) are connected with a diode (VD1), are connected with a diode (VD2) between the output of described three terminal regulator (IC) and the input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205554133U CN201830159U (en) | 2010-10-11 | 2010-10-11 | Adjustable direct current stabilized power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205554133U CN201830159U (en) | 2010-10-11 | 2010-10-11 | Adjustable direct current stabilized power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201830159U true CN201830159U (en) | 2011-05-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205554133U Expired - Fee Related CN201830159U (en) | 2010-10-11 | 2010-10-11 | Adjustable direct current stabilized power supply |
Country Status (1)
| Country | Link |
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| CN (1) | CN201830159U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841623A (en) * | 2011-10-28 | 2012-12-26 | 南通天华和睿科技创业有限公司 | Three-terminal voltage-stabilizing integrated module of power supply circuit |
| CN104806909A (en) * | 2015-04-27 | 2015-07-29 | 江苏中科贯微自动化科技有限公司 | High-brightness LED (light-emitting diode) shadowless light source used for machine vision system |
| CN105375565A (en) * | 2015-11-09 | 2016-03-02 | 国家电网公司 | Storage battery charging voltage stabilizing circuit |
| CN110220537A (en) * | 2019-06-12 | 2019-09-10 | 五邑大学 | A kind of detection circuit applied to piezoresistive transducer |
| CN110445622A (en) * | 2019-08-19 | 2019-11-12 | 深圳坚朗海贝斯智能科技有限公司 | A kind of communication equipment for supporting low-voltage wired to network |
| CN110794908A (en) * | 2019-10-10 | 2020-02-14 | 天津大学 | Voltage source for bias superconducting nanowire single-photon detector |
| CN112737359A (en) * | 2020-12-24 | 2021-04-30 | 中航贵州飞机有限责任公司 | Constant-voltage constant-current direct-current high-power adjustable power supply module |
-
2010
- 2010-10-11 CN CN2010205554133U patent/CN201830159U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102841623A (en) * | 2011-10-28 | 2012-12-26 | 南通天华和睿科技创业有限公司 | Three-terminal voltage-stabilizing integrated module of power supply circuit |
| CN104806909A (en) * | 2015-04-27 | 2015-07-29 | 江苏中科贯微自动化科技有限公司 | High-brightness LED (light-emitting diode) shadowless light source used for machine vision system |
| CN105375565A (en) * | 2015-11-09 | 2016-03-02 | 国家电网公司 | Storage battery charging voltage stabilizing circuit |
| CN110220537A (en) * | 2019-06-12 | 2019-09-10 | 五邑大学 | A kind of detection circuit applied to piezoresistive transducer |
| CN110445622A (en) * | 2019-08-19 | 2019-11-12 | 深圳坚朗海贝斯智能科技有限公司 | A kind of communication equipment for supporting low-voltage wired to network |
| CN110445622B (en) * | 2019-08-19 | 2022-02-11 | 深圳坚朗海贝斯智能科技有限公司 | Communication equipment supporting low-voltage wired networking |
| CN110794908A (en) * | 2019-10-10 | 2020-02-14 | 天津大学 | Voltage source for bias superconducting nanowire single-photon detector |
| CN112737359A (en) * | 2020-12-24 | 2021-04-30 | 中航贵州飞机有限责任公司 | Constant-voltage constant-current direct-current high-power adjustable power supply module |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110511 Termination date: 20111011 |