CN104242687A - Adjustable voltage-stabilizing power supply circuit - Google Patents
Adjustable voltage-stabilizing power supply circuit Download PDFInfo
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- CN104242687A CN104242687A CN201410371540.0A CN201410371540A CN104242687A CN 104242687 A CN104242687 A CN 104242687A CN 201410371540 A CN201410371540 A CN 201410371540A CN 104242687 A CN104242687 A CN 104242687A
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Abstract
The invention discloses an adjustable voltage-stabilizing power supply circuit. The adjustable voltage-stabilized power supply circuit comprises a transformer T, a rectifier bridge D, a filter capacitor C1 and a voltage-stabilizing chip U1. The input end of the transformer T is externally connected with the mains supply. The positive output end and the negative output end of the transformer T are connected with the positive input end and the negative input end of the rectifier bridge D. The filter capacitor C1 is connected to the positive output end and the negative output end of the rectifier bridge D in parallel. The positive output end of the rectifier bridge D is connected with the voltage input end of the voltage-stabilizing chip U1. The output adjusting end of the voltage-stabilizing chip U1 is connected with the negative output end of the rectifier bridge D through a potentionmeter K. The filter capacitor C2 is connected between the voltage output end of the voltage-stabilizing chip U1 and the negative output end of the rectifier bridge D in parallel. The adjustable voltage-stabilizing power supply circuit is simple, low in cost, capable of being manufactured manually, suitable for the populations such as students, safe, reliable and good in application prospect.
Description
Technical field
The present invention relates to a kind of adjustable voltage-stabilized source, belong to power technique fields.
Background technology
At present, voltage-stabilized power supply circuit on the market, the power supply of output, electric current are all changeless, applicable situation is limited, certainly also has the voltage-stabilized power supply circuit that can export regulated power supply, current value, but, circuit is complicated, expensive, is not suitable for the colony being similar to student and so on and uses.
Summary of the invention
Technical problem solved by the invention is voltage-stabilized power supply circuit on the market, the power supply exported, electric current are all changeless, the voltage-stabilized power supply circuit of the limited output regulated power supply of applicable situation, current value, but, circuit is complicated, expensive, be not suitable for the problem of the colony's use being similar to student and so on.Adjustable voltage-stabilized source of the present invention, circuit is simple, with low cost, can make by hand, and the colony being applicable to student and so on uses, safe and reliable, has a good application prospect.
In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
A kind of adjustable voltage-stabilized source, it is characterized in that: comprise transformer T, rectifier bridge D, filter capacitor C1 and voltage stabilizing chip U1, the external civil power of input of described transformer T, described transformer T just, negative output terminal respectively with rectifier bridge D just, negative input end is connected, described filter capacitor C1 is just being connected in parallel on rectifier bridge D, negative output terminal, the positive output end of described rectifier bridge D is connected with the voltage input end of voltage stabilizing chip U1, the output adjustment end of described voltage stabilizing chip U1 is connected with the negative output terminal of rectifier bridge D by potentiometer K, filter capacitor C2 is parallel with between the voltage output end of described voltage stabilizing chip U1 and the negative output terminal of rectifier bridge D, the output adjustment end of described voltage stabilizing chip U1 is also connected with the positive pole of diode D1, the negative pole of described diode D1 is connected with the voltage output end of voltage stabilizing chip U1.
Aforesaid a kind of adjustable voltage-stabilized source, is characterized in that: the voltage output end of described voltage stabilizing chip U1 is also connected with the positive pole of diode D2, and the negative pole of described diode D2 is connected with the positive output end of rectifier bridge D.
Aforesaid a kind of adjustable voltage-stabilized source, is characterized in that: described voltage stabilizing chip U1 is LM317 three-terminal voltage-stabilizing chip.
Aforesaid a kind of adjustable voltage-stabilized source, is characterized in that: described voltage stabilizing chip U1 is provided with fin.
Aforesaid a kind of adjustable voltage-stabilized source, is characterized in that: the input of described transformer T is also in series with fuse F.
Aforesaid a kind of adjustable voltage-stabilized source, is characterized in that: the output voltage of described transformer T is 28V.
Aforesaid a kind of adjustable voltage-stabilized source, is characterized in that: the output voltage range of the voltage output end of described voltage stabilizing chip U1 is between 1.25V-36V.
The invention has the beneficial effects as follows: adjustable voltage-stabilized source of the present invention, circuit is simple, with low cost, can make by hand, and the colony being applicable to student and so on uses, safe and reliable, has a good application prospect.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of adjustable voltage-stabilized source of the present invention.
Embodiment
Below in conjunction with Figure of description, the present invention is further illustrated.
As shown in Figure 1, a kind of adjustable voltage-stabilized source, comprise transformer T, rectifier bridge D, filter capacitor C1 and voltage stabilizing chip U1, the external civil power of input of transformer T, the input of transformer T is also in series with fuse F, safe and reliable, transformer T just, negative output terminal respectively with rectifier bridge D just, negative input end is connected, filter capacitor C1 is just being connected in parallel on rectifier bridge D, negative output terminal, the positive output end of rectifier bridge D is connected with the voltage input end of voltage stabilizing chip U1, the output adjustment end of voltage stabilizing chip U1 is connected with the negative output terminal of rectifier bridge D by potentiometer K, filter capacitor C2 is parallel with between the voltage output end of voltage stabilizing chip U1 and the negative output terminal of rectifier bridge D, the output adjustment end of voltage stabilizing chip U1 is also connected with the positive pole of diode D1, the negative pole of diode D1 is connected with the voltage output end of voltage stabilizing chip U1, diode D1 can protect voltage stabilizing chip U1.
The voltage output end of described voltage stabilizing chip U1 is also connected with the positive pole of diode D2, and the negative pole of diode D2 is connected with the positive output end of rectifier bridge D, and diode D2, for improving the characteristic of the output voltage of voltage stabilizing chip U1, prevents interference.
Described voltage stabilizing chip U1 is LM317 three-terminal voltage-stabilizing chip, voltage stabilizing chip U1 is provided with fin and sends out, convenient at the large voltage of output, when electric current, dispel the heat, prevent from burning out chip, the output voltage of transformer T is here 28V, the output voltage range of the voltage output end of voltage stabilizing chip U1 is adjustable between 1.25V-36V, span scope is large, and circuit is simple, with low cost, can make by hand, the colony being applicable to student and so on uses.
More than show and describe general principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection range is defined by appending claims and equivalent thereof.
Claims (7)
1. an adjustable voltage-stabilized source, it is characterized in that: comprise transformer T, rectifier bridge D, filter capacitor C1 and voltage stabilizing chip U1, the external civil power of input of described transformer T, described transformer T just, negative output terminal respectively with rectifier bridge D just, negative input end is connected, described filter capacitor C1 is just being connected in parallel on rectifier bridge D, negative output terminal, the positive output end of described rectifier bridge D is connected with the voltage input end of voltage stabilizing chip U1, the output adjustment end of described voltage stabilizing chip U1 is connected with the negative output terminal of rectifier bridge D by potentiometer K, filter capacitor C2 is parallel with between the voltage output end of described voltage stabilizing chip U1 and the negative output terminal of rectifier bridge D, the output adjustment end of described voltage stabilizing chip U1 is also connected with the positive pole of diode D1, the negative pole of described diode D1 is connected with the voltage output end of voltage stabilizing chip U1.
2. a kind of adjustable voltage-stabilized source according to claim 1, is characterized in that: the voltage output end of described voltage stabilizing chip U1 is also connected with the positive pole of diode D2, and the negative pole of described diode D2 is connected with the positive output end of rectifier bridge D.
3. a kind of adjustable voltage-stabilized source according to claim 1 and 2, is characterized in that: described voltage stabilizing chip U1 is LM317 three-terminal voltage-stabilizing chip.
4. a kind of adjustable voltage-stabilized source according to claim 1, is characterized in that: described voltage stabilizing chip U1 is provided with fin.
5. a kind of adjustable voltage-stabilized source according to claim 1, is characterized in that: the input of described transformer T is also in series with fuse F.
6. a kind of adjustable voltage-stabilized source according to claim 1, is characterized in that: the output voltage of described transformer T is 28V.
7. a kind of adjustable voltage-stabilized source according to claim 1, is characterized in that: the output voltage range of the voltage output end of described voltage stabilizing chip U1 is between 1.25V-36V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410371540.0A CN104242687A (en) | 2014-07-31 | 2014-07-31 | Adjustable voltage-stabilizing power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410371540.0A CN104242687A (en) | 2014-07-31 | 2014-07-31 | Adjustable voltage-stabilizing power supply circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104242687A true CN104242687A (en) | 2014-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410371540.0A Pending CN104242687A (en) | 2014-07-31 | 2014-07-31 | Adjustable voltage-stabilizing power supply circuit |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110794908A (en) * | 2019-10-10 | 2020-02-14 | 天津大学 | Voltage source for bias superconducting nanowire single-photon detector |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2038646U (en) * | 1988-08-30 | 1989-05-31 | 王刚 | Integrated power supply for providing regulated dc voltage |
| CN204013260U (en) * | 2014-07-31 | 2014-12-10 | 苏州华徕光电仪器有限公司 | A kind of adjustable voltage-stabilized source |
-
2014
- 2014-07-31 CN CN201410371540.0A patent/CN104242687A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2038646U (en) * | 1988-08-30 | 1989-05-31 | 王刚 | Integrated power supply for providing regulated dc voltage |
| CN204013260U (en) * | 2014-07-31 | 2014-12-10 | 苏州华徕光电仪器有限公司 | A kind of adjustable voltage-stabilized source |
Non-Patent Citations (1)
| Title |
|---|
| 张凯: "LM317集成稳压器应用两例", 《电子技术应用》, no. 2, 17 February 1992 (1992-02-17), pages 43 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110794908A (en) * | 2019-10-10 | 2020-02-14 | 天津大学 | Voltage source for bias superconducting nanowire single-photon detector |
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Application publication date: 20141224 |