CN101626199A - Transformerless DC voltage-stabilized power supply - Google Patents
Transformerless DC voltage-stabilized power supply Download PDFInfo
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- CN101626199A CN101626199A CN200810040300A CN200810040300A CN101626199A CN 101626199 A CN101626199 A CN 101626199A CN 200810040300 A CN200810040300 A CN 200810040300A CN 200810040300 A CN200810040300 A CN 200810040300A CN 101626199 A CN101626199 A CN 101626199A
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Abstract
The invention relates to a transformerless DC voltage-stabilized power supply, which consists of a rectifying and filtering circuit and a voltage-stabilizing circuit, wherein the rectifying and filtering circuit comprises four diodes and a capacitor for filtering; and the voltage-stabilizing circuit comprises two triodes, a voltage-stabilizing diode, a capacitor used for stabilizing voltage and three resistors, and one triode of the two triodes is a switching tube. The working mode comprises that: DC is output by an anode of the filtering capacitor after AC is rectified and filtered to conduct the switch triode and charge the capacitor for stabilizing the voltage; the other triode is conducted when the voltage is charged to a voltage stabilizing value of the voltage-stabilizing diode to force the switch triode to be cut off; at the time, load power is provided by the voltage-stabilizing capacitor; and when the capacitor is discharged to make the voltage lower than the voltage stabilizing value of the voltage-stabilizing diode, the other triode cuts off the conduction of the switch triode so as to make the output voltage maintained in a stable value.
Description
Affiliated technical field
The present invention relates to a kind of D.C. regulated power supply, particularly relate to a kind of transformerless DC voltage-stabilized power supply.
Background technology
At present, existing D.C. regulated power supply all contains a transformer that is used for step-down, thereby volume can not accomplish very for a short time, and when especially needing to export big electric current, it is heavy that volume can seem, in addition, transformer occupies very big production cost.
Summary of the invention
The purpose of this invention is to provide a kind of transformerless D.C. regulated power supply, to exist volume stupid to overcome existing D.C. regulated power supply, the deficiency that production cost is high.
For reaching above-mentioned purpose, the technical solution adopted for the present invention to solve the technical problems is: form a transformerless DC voltage-stabilized power supply by a current rectifying and wave filtering circuit and a voltage stabilizing circuit, contain four diodes in the current rectifying and wave filtering circuit, an electric capacity that is used for filtering, described four diodes are connected into a bridge rectifier, its two inputs are connected with power supply, and its two outputs are connected with negative pole with the positive pole of filter capacitor respectively.
Contain two triodes in the voltage stabilizing circuit, a voltage stabilizing didoe, an electric capacity that is used for voltage stabilizing, with three resistance, a triode in described two triodes is a switching tube, be to be used to open or close being connected between filter capacitor and voltage stabilizing didoe and the described electric capacity that is used for voltage stabilizing, the collector electrode of described this switch triode is connected with the positive pole of filter capacitor, emitter is connected with a described positive pole that is used for electric capacity of voltage regulation with the negative pole of described voltage stabilizing didoe respectively, the base stage of described this switch triode is connected with the collector electrode of another triode, and also be connected in series a resistance between the positive pole of the base stage of described this switch triode and filter capacitor, this resistance provides base current for described this switch triode, the grounded emitter of described another triode, and be connected in series a current-limiting resistance between its base stage and the voltage stabilizing didoe positive pole, be connected in series another current-limiting resistance between the positive pole of described voltage stabilizing didoe and the ground wire, the described negative pole that is used for the electric capacity of voltage stabilizing also is connected with ground wire.
Transformerless DC voltage-stabilized power supply working method of the present invention is: the alternating current of 220V is exported the direct current of about 311V by the positive pole of filter capacitor behind rectifying and wave-filtering, the base current that is provided through current-limiting resistance by filter capacitor makes the switch triode conducting, the electric current of its conducting is to the described electric capacity charging that is used for voltage stabilizing, when voltage is charged to the voltage stabilizing value of voltage stabilizing didoe, the electric current that flows through voltage stabilizing didoe sharply increases, sharply the electric current that increases makes described another triode conducting, the conducting of this triode is clamped down near zero level the current potential of the base stage of switch triode switch triode is ended, at this moment load electricity consumption is provided by the described electric capacity that is used for voltage stabilizing, when making voltage be lower than the voltage stabilizing value of voltage stabilizing didoe when capacitor discharge, flow through the rapid minimizing of electric current of voltage stabilizing didoe and described another triode is ended, the current potential by the base stage that makes switch triode of this triode improves and makes the switch triode conducting again, make the voltage of output keep a stationary value therefrom, the height of output voltage is by the voltage stabilizing value decision of voltage stabilizing didoe.
The advantage of a kind of transformerless D.C. regulated power supply of the present invention is: omitted transformer and make volume reduce cost to reduce.
Description of drawings
Accompanying drawing is the structure chart of a kind of transformerless DC voltage-stabilized power supply of the present invention
Embodiment
To be described in detail specific embodiments of the present invention with reference to accompanying drawing: accompanying drawing shows rectification and considers wave circuit 13, voltage stabilizing circuit 14, diode 1,2,3,4, electric capacity 5,12, triode 7,8, voltage stabilizing didoe 10, resistance 6,9,11 annexation is formed a transformerless DC voltage-stabilized power supply by a current rectifying and wave filtering circuit 13 and a voltage stabilizing circuit 14 in the accompanying drawings, contains four diodes 1 in the current rectifying and wave filtering circuit 13,2,3,4, an electric capacity 5 that is used for filtering, four diodes 1,2,3,4 are connected into a bridge rectifier, and its two inputs are connected with power supply, and its two outputs are connected with negative pole with the positive pole of filter capacitor 5 respectively.
Contain two triodes 7 in the voltage stabilizing circuit 14,8, a voltage stabilizing didoe 10, an electric capacity 12 that is used for voltage stabilizing, with three resistance 6,9,11, triode 7 is to be used to open or close being connected between filter capacitor 5 and voltage stabilizing didoe 10 and the electric capacity 12, the collector electrode of triode 7 is connected with the positive pole of filter capacitor 5, emitter is connected with the negative pole of voltage stabilizing didoe 10 and the positive pole of electric capacity 12 respectively, the base stage of triode 7 is connected with the collector electrode of another triode 8, also be connected in series a resistance 6 between the positive pole of the base stage of triode 7 and filter capacitor 5, resistance 6 provides base current for triode 7, the grounded emitter of triode 8, and be connected in series a current-limiting resistance 9 between the positive pole of its base stage and voltage stabilizing didoe 10, be connected in series another current-limiting resistance 11 between the positive pole of voltage stabilizing didoe 10 and the ground wire, the negative pole of electric capacity 12 also is connected with ground wire.
A kind of transformerless DC voltage-stabilized power supply operation principle of the present invention is: the alternating current of 220V is exported the direct current of about 311V by the positive pole of filter capacitor 5 behind rectifying and wave-filtering, the base current that is provided through current-limiting resistance 6 by filter capacitor 5 makes triode 7 conductings, the electric current of its conducting is to electric capacity 12 chargings, when voltage is charged to the voltage stabilizing value of voltage stabilizing didoe 10, the electric current that flows through voltage stabilizing didoe 10 sharply increases, sharply the electric current that increases makes triode 8 conductings, the conducting of triode 8 is clamped down near zero level the current potential of the base stage of triode 7 triode 7 is ended, at this moment load electricity consumption is provided by electric capacity 12, when making voltage be lower than the voltage stabilizing value of voltage stabilizing didoe 10 when electric capacity 12 discharges, flow through the rapid minimizing of electric current of voltage stabilizing didoe 10 and three utmost points 8 are ended, the current potential by the base stage that makes triode 7 of triode 8 improves and makes triode 7 conductings again, make the voltage of output keep a stationary value therefrom, the height of output voltage is by the voltage stabilizing value decision of voltage stabilizing didoe 10.
Claims (2)
1; A kind of transformerless DC voltage-stabilized power supply is made up of a current rectifying and wave filtering circuit (13) and a mu balanced circuit (14); It is characterized in that: contain two triodes (7), (8) in the mu balanced circuit (14); A Zener diode (10); An electric capacity (12) that is used for voltage stabilizing; The colelctor electrode of triode (7) is connected with the positive pole of filter capacitor (5); Emitter stage is connected 12 with the negative pole of Zener diode (10) with electric capacity respectively) positive pole be connected; The base stage of triode (7) is connected with the colelctor electrode of another triode (8); The grounded emitter of triode (8)
2, be to be used for opening or closing filter capacitor (5) and steady being connected between diode (10) and the electric capacity (12) according to claims 1 described triode (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810040300A CN101626199A (en) | 2008-07-08 | 2008-07-08 | Transformerless DC voltage-stabilized power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810040300A CN101626199A (en) | 2008-07-08 | 2008-07-08 | Transformerless DC voltage-stabilized power supply |
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| Publication Number | Publication Date |
|---|---|
| CN101626199A true CN101626199A (en) | 2010-01-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810040300A Pending CN101626199A (en) | 2008-07-08 | 2008-07-08 | Transformerless DC voltage-stabilized power supply |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710155A (en) * | 2012-05-28 | 2012-10-03 | 深圳华意隆电气股份有限公司 | Capacitor ballast type direct current power supply circuit for draught fan |
| CN104426173A (en) * | 2013-08-26 | 2015-03-18 | 深圳市海洋王照明工程有限公司 | Charging circuit |
| CN106451703A (en) * | 2016-11-24 | 2017-02-22 | 上海电机学院 | Universal wireless charge system |
-
2008
- 2008-07-08 CN CN200810040300A patent/CN101626199A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102710155A (en) * | 2012-05-28 | 2012-10-03 | 深圳华意隆电气股份有限公司 | Capacitor ballast type direct current power supply circuit for draught fan |
| CN104426173A (en) * | 2013-08-26 | 2015-03-18 | 深圳市海洋王照明工程有限公司 | Charging circuit |
| CN106451703A (en) * | 2016-11-24 | 2017-02-22 | 上海电机学院 | Universal wireless charge system |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100113 |