CN1461100A - Low-voltage D.C. power supply circuit - Google Patents
Low-voltage D.C. power supply circuit Download PDFInfo
- Publication number
- CN1461100A CN1461100A CN 03129175 CN03129175A CN1461100A CN 1461100 A CN1461100 A CN 1461100A CN 03129175 CN03129175 CN 03129175 CN 03129175 A CN03129175 A CN 03129175A CN 1461100 A CN1461100 A CN 1461100A
- Authority
- CN
- China
- Prior art keywords
- voltage
- connects
- field effect
- negative pole
- effect transistor
- 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.)
- Granted
Links
Images
Landscapes
- Rectifiers (AREA)
Abstract
The present invention relates to a low-voltage D.C. power supply circuit. The circuit is formed from rectifier bridge stack, voltage-stabilizing tube, field effect transistor, triode and capacitors. The invention also provides their connection method, and said invention can be used as power supply of low-voltage D.C. electric device and power supply of changeable cell.
Description
Technical field
The present invention relates to a kind of power circuit, particularly a kind of low-voltage DC source circuit.
Background technology
Existingly convert electric main the power circuit of low-voltage DC to, generally all adopt transformer to carry out step-down, but, not only bring inconvenience, also make manufacturing cost be difficult to reduce to use because the volume of transformer is big, Heavy Weight.
Summary of the invention
Technical problem to be solved by this invention be provide at above-mentioned prior art present situation a kind of need not transformer and low-voltage DC source circuit simple in structure, cheap for manufacturing cost.
The present invention solves the problems of the technologies described above the technical scheme that is adopted: this low-voltage DC source circuit includes rectifier bridge heap DB1, voltage-stabiliser tube DW1, field effect transistor Q1, triode Q2 and capacitor C 1, C2;
Wherein rectifier bridge is piled the input termination electric main of DB1, and the positive pole of output divides three the tunnel, and the first via connects the negative electrode of voltage-stabiliser tube DW1, and the second the tunnel connects the anode of diode D1, and Third Road connects the drain electrode of field effect transistor Q1;
The anode of voltage-stabiliser tube DW1 connects the base stage of triode Q2 through resistance R 1, and the negative electrode of diode D1 connects the collector electrode of triode Q2 through resistance R 2, R3, and the emitter of triode Q2 connects the negative pole of output end of rectifier bridge heap DB1;
Anodal connecting resistance R2, the R3 of capacitor C 1 connects end altogether, and negative pole connects the negative pole of output end of rectifier bridge heap DB1;
The grid of field effect transistor Q1 connects the collector electrode of triode Q2, and its source electrode connects the positive pole of capacitor C 2 through resistance R 4, and the negative pole of capacitor C 2 connects the negative pole of output end of rectifier bridge heap DB1;
The positive and negative electrode of capacitor C 2 is the output of whole power circuit, connects load.
In order thoroughly to isolate with electric main, can between the negative pole of output end that the negative pole and the rectifier bridge of described capacitor C 2 are piled DB1, add and be connected to a field effect transistor Q3, be the negative pole that the drain electrode of field effect pipe Q3 connects capacitor C 2, grid connects the collector electrode of triode Q2, and source electrode connects the negative pole of output end of rectifier bridge heap DB1.
More steady for capacitor C 1 is discharged and recharged, can be parallel with resistance R 5 at its two ends.
Triode in above-mentioned can substitute with field effect transistor, and the field effect transistor in above-mentioned also can substitute with triode.
Compared with prior art, the present invention has realized electric main is converted to low-voltage dc power supply by pure electronic component, saved the transformer that volume is big, cost is high, can be used as the power supply of low-voltage direct electrical equipment and the power supply of rechargeable battery etc., be with a wide range of applications.
Description of drawings
Fig. 1 is the circuit theory diagrams of the embodiment of the invention one.
Fig. 2 is the circuit theory diagrams of the embodiment of the invention two.
Fig. 3 is the circuit theory diagrams of the embodiment of the invention three.
Fig. 4 is the circuit theory diagrams of the embodiment of the invention four.
Fig. 5 is the circuit theory diagrams of the embodiment of the invention five.
Fig. 6 is the circuit theory diagrams of the embodiment of the invention six.
Fig. 7 is the circuit theory diagrams of the embodiment of the invention seven.
Fig. 8 is the circuit theory diagrams of the embodiment of the invention eight.
Fig. 9 is the circuit theory diagrams of the embodiment of the invention nine.
Embodiment
Embodiment describes in further detail the present invention below in conjunction with accompanying drawing.As shown in Figure 1, be the embodiment of the invention one, this low-voltage DC source circuit includes rectifier bridge heap DB1, voltage-stabiliser tube DW1, field effect transistor Q1, triode Q2 and capacitor C 1, C2;
Wherein 1., 3. the input of rectifier bridge heap DB1 connects electric main, and 2. the positive pole of output divides three the tunnel, and the first via connects the negative electrode of voltage-stabiliser tube DW1, and the second the tunnel connects the anode of diode D1, and Third Road connects the drain electrode of field effect transistor Q1;
The anode of voltage-stabiliser tube DW1 connects the base stage of triode Q2 through resistance R 1, the negative electrode connecting resistance R2 of diode D1, the other end of resistance R 2 divides three the tunnel, the negative pole of output end that the first via meets rectifier bridge heap DB1 through resistance R 5 4., the second the tunnel connects the collector electrode of triode Q2 through resistance R 3, the negative pole of output end that the emitter of triode Q2 meets rectifier bridge heap DB1 4., Third Road connects the positive pole of capacitor C 1, the negative pole of output end that the negative pole of capacitor C 1 meets rectifier bridge heap DB1 4.;
The grid of field effect transistor Q1 connects the collector electrode of triode Q2, and its source electrode connects the positive pole of capacitor C 2 through resistance R 4, and the negative pole of output end that the negative pole of capacitor C 2 meets rectifier bridge heap DB1 4.; The positive and negative electrode of capacitor C 2 is the output of whole power circuit, meets load resistance R7;
For the grid voltage that does not make field effect transistor Q1 too high, present embodiment also adds between 4. at the negative pole of output end of the grid of field effect transistor Q1 and rectifier bridge heap DB1 and is connected to voltage-stabiliser tube DW2 and resistance R 6, it is the grid that the negative electrode of voltage-stabiliser tube DW2 meets field effect transistor Q1, the negative pole of output end that anode meets rectifier bridge heap DB1 4., resistance R 6 is connected in parallel on the two ends of voltage-stabiliser tube DW2.
The course of work is: electric main is after bridge heap DB1 rectification, (its specification can be selected according to the required voltage of load in the conducting voltage of 0V and voltage-stabiliser tube DW1 when voltage, as 24V) between the time, triode Q2 ends, at this moment, the civil power after rectification gives capacitor C 1 charging through diode D1, resistance R 2, and the voltage at capacitor C 1 two ends is added between the grid and source electrode of field effect transistor Q1 through resistance R 3, field effect transistor Q1 conducting, capacitor C 2 begin charging; When the commutating voltage of bridge heap DB1 output surpassed the conducting voltage of voltage-stabiliser tube DW1, voltage-stabiliser tube DW1 punctured conducting, triode Q2 conducting, and the current potential of its collector electrode is approximately zero, also be that the grid potential of field effect pipe Q1 is approximately zero, so field effect transistor Q1 ends;
When commercial power rectification voltage drops to the conducting voltage of voltage-stabiliser tube DW1 when following behind peak value, voltage-stabiliser tube DW1 ends, then with initial condition in the same manner, triode Q2 ends, field effect transistor Q1 conducting, capacitor C 2 begins charging;
So, just can obtain a DC power supply that meets the actual required voltage of load, and select the voltage-stabiliser tube DW1 of different conducting voltage just can change output voltage, and select the capacitor C 2 of different capabilities just can change power output at the two ends of capacitor C 2.
Resistance R 5 in the foregoing description one mainly plays the dividing potential drop effect, is used for making discharging and recharging of capacitor C 1 more steady, in actual applications, also can make the circuit operate as normal if save this resistance R 5, embodiment two as shown in Figure 2.
As shown in Figure 3, be embodiments of the invention three, different with embodiment one is, the negative pole of output end of the negative pole of described resistance R 7 and capacitor C 2 and rectifier bridge heap DB1 4. between adjunction one field effect transistor Q3, it is the negative pole that the drain electrode of field effect pipe Q3 connects capacitor C 2, grid connects the collector electrode of triode Q2, the negative pole of output end that source electrode meets rectifier bridge heap DB1 4., thereby reach the purpose of isolating with electric main.
The course of work and embodiment one are roughly the same, and field effect transistor Q3 that is increased and field effect transistor Q1 end or conducting synchronously.
Q1 in above-mentioned, Q2, Q3 all can freely select bipolar transistor or field effect transistor.When selecting triode, the negative pole of output end that its base stage and rectifier bridge are piled DB1 can need not to add between 4. and be connected to voltage-stabiliser tube and resistance; And when selecting field effect transistor, for not making its grid voltage too high, the negative pole of output end that is preferably in its grid and rectifier bridge heap DB1 adds between 4. and is connected to voltage-stabiliser tube and resistance, and not adjunction also is fine certainly.Now enumerate several variations wherein:
As shown in Figure 4; be embodiments of the invention four; be with the difference of embodiment one; Q1 wherein replaces with triode; the drain electrode of the corresponding former field effect transistor of its collector electrode; the source electrode of the corresponding former field effect transistor of its emitter, the grid of the corresponding former field effect transistor of its base stage was used for protecting the voltage-stabiliser tube DW2 of field effect transistor and resistance R 6 then to be omitted originally.
As shown in Figure 5; be embodiments of the invention five; be with the difference of embodiment three; Q1 wherein, Q3 all replace with triode; the drain electrode of the corresponding former field effect transistor of its collector electrode; the source electrode of the corresponding former field effect transistor of its emitter, the grid of the corresponding former field effect transistor of its base stage was used for protecting the voltage-stabiliser tube DW2 of field effect transistor and resistance R 6 then to be omitted originally.
As shown in Figure 6, be embodiments of the invention six, be with the difference of embodiment four, Q2 wherein replaces with field effect transistor, the collector electrode of its corresponding former triode that drains, the emitter of the corresponding former triode of its source electrode, the base stage of the corresponding former triode of grid, therefore, in order not make its grid voltage too high, add between 4. at the negative pole of output end of its grid and rectifier bridge heap DB1 and to be connected to voltage-stabiliser tube DW3 and resistance R 8.
As shown in Figure 7, be embodiments of the invention seven, be with the difference of embodiment five, Q2 wherein replaces with field effect transistor, the collector electrode of its corresponding former triode that drains, the emitter of the corresponding former triode of its source electrode, the base stage of the corresponding former triode of grid, therefore, in order not make its grid voltage too high, add between 4. at the negative pole of output end of its grid and rectifier bridge heap DB1 and to be connected to voltage-stabiliser tube DW3 and resistance R 8.
As shown in Figure 8, be embodiments of the invention eight, be with the difference of embodiment one, Q2 wherein replaces with field effect transistor, the collector electrode of its corresponding former triode that drains, the emitter of the corresponding former triode of its source electrode, the base stage of the corresponding former triode of grid, therefore, in order not make its grid voltage too high, add between 4. at the negative pole of output end of its grid and rectifier bridge heap DB1 and to be connected to voltage-stabiliser tube DW3 and resistance R 8.
As shown in Figure 9, be embodiments of the invention nine, be with the difference of embodiment three, Q2 wherein replaces with field effect transistor, the collector electrode of its corresponding former triode that drains, the emitter of the corresponding former triode of its source electrode, the base stage of the corresponding former triode of grid, therefore, in order not make its grid voltage too high, add between 4. at the negative pole of output end of its grid and rectifier bridge heap DB1 and to be connected to voltage-stabiliser tube DW3 and resistance R 8.
The triode of selecting for use in the various embodiments described above is the NPN type, also can be equal to replacement certainly with positive-negative-positive, only needs the position of collector electrode and emitter is got final product conversely; The field effect transistor of selecting for use in the foregoing description is nmos type, also can be equal to replacement certainly with pmos type, only needs the position of source electrode and drain electrode is got final product conversely; These variations are all within protection scope of the present invention.
Claims (10)
1, a kind of low-voltage DC source circuit includes rectifier bridge heap DB1, voltage-stabiliser tube DW1, field effect transistor Q1, triode Q2 and capacitor C 1, C2;
Wherein rectifier bridge is piled the input termination electric main of DB1, and the positive pole of output divides three the tunnel, and the first via connects the negative electrode of voltage-stabiliser tube DW1, and the second the tunnel connects the anode of diode D1, and Third Road connects the drain electrode of field effect transistor Q1;
The anode of voltage-stabiliser tube DW1 connects the base stage of triode Q2 through resistance R 1, and the negative electrode of diode D1 connects the collector electrode of triode Q2 through resistance R 2, R3, and the emitter of triode Q2 connects the negative pole of output end of rectifier bridge heap DB1;
Anodal connecting resistance R2, the R3 of capacitor C 1 connects end altogether, and negative pole connects the negative pole of output end of rectifier bridge heap DB1;
The grid of field effect transistor Q1 connects the collector electrode of triode Q2, and its source electrode connects the positive pole of capacitor C 2 through resistance R 4, and the negative pole of capacitor C 2 connects the negative pole of output end of rectifier bridge heap DB1;
The positive and negative electrode of capacitor C 2 is the output of whole power circuit, connects load.
2, low-voltage DC source circuit according to claim 1, it is characterized in that between the negative pole of output end that the negative pole and the rectifier bridge of described capacitor C 2 are piled DB1, adding and be connected to a field effect transistor Q3, it is the negative pole that the drain electrode of field effect pipe Q3 connects capacitor C 2, grid connects the collector electrode of triode Q2, and source electrode connects the negative pole of output end of rectifier bridge heap DB1.
3, low-voltage DC source circuit according to claim 1 and 2 is characterized in that also being parallel with resistance R 5 at the two ends of described capacitor C 1.
4, according to claim 1,2 or 3 described low-voltage DC source circuits, it is characterized in that between the negative pole of output end that grid and the rectifier bridge of described field effect transistor Q1 are piled DB1, adding and be connected to voltage-stabiliser tube DW2 and resistance R 6, it is the grid that the negative electrode of voltage-stabiliser tube DW2 meets field effect transistor Q1, anode connects the negative pole of output end of rectifier bridge heap DB1, and resistance R 6 is connected in parallel on the two ends of voltage-stabiliser tube DW2.
5,, it is characterized in that described Q2 replaces with field effect transistor according to claim 1,2 or 3 described low-voltage DC source circuits.
6, low-voltage DC source circuit according to claim 5, it is characterized in that adding between the negative pole of output end of the grid of described field effect transistor Q2 and rectifier bridge heap DB1 and be connected to voltage-stabiliser tube DW3 and resistance R 8, it is the grid that the negative electrode of voltage-stabiliser tube DW3 meets field effect transistor Q2, anode connects the negative pole of output end of rectifier bridge heap DB1, and resistance R 8 is connected in parallel on the two ends of voltage-stabiliser tube DW3.
7, low-voltage DC source circuit according to claim 1 is characterized in that described Q1 replaces with triode.
8, low-voltage DC source circuit according to claim 2 is characterized in that described Q1 and/or Q3 replace with triode.
9,, it is characterized in that described Q2 replaces with field effect transistor according to claim 7 or 8 described low-voltage DC source circuits.
10, low-voltage DC source circuit according to claim 9, it is characterized in that adding between the negative pole of output end of the grid of described field effect transistor Q2 and rectifier bridge heap DB1 and be connected to voltage-stabiliser tube DW3 and resistance R 8, it is the grid that the negative electrode of voltage-stabiliser tube DW3 meets field effect transistor Q2, anode connects the negative pole of output end of rectifier bridge heap DB1, and resistance R 8 is connected in parallel on the two ends of voltage-stabiliser tube DW3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03129175 CN1278482C (en) | 2003-06-11 | 2003-06-11 | Low-voltage D.C. power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03129175 CN1278482C (en) | 2003-06-11 | 2003-06-11 | Low-voltage D.C. power supply circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1461100A true CN1461100A (en) | 2003-12-10 |
| CN1278482C CN1278482C (en) | 2006-10-04 |
Family
ID=29591167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03129175 Expired - Fee Related CN1278482C (en) | 2003-06-11 | 2003-06-11 | Low-voltage D.C. power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1278482C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457461A (en) * | 2013-09-10 | 2013-12-18 | 昆山新金福精密电子有限公司 | Direct current voltage stabilizing circuit |
| CN108683354A (en) * | 2018-05-28 | 2018-10-19 | 红河学院 | A kind of pulse frequency modulated convertor circuit |
| CN109038504A (en) * | 2015-03-09 | 2018-12-18 | 王振环 | DC power supply hiccup formula protects circuit |
-
2003
- 2003-06-11 CN CN 03129175 patent/CN1278482C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457461A (en) * | 2013-09-10 | 2013-12-18 | 昆山新金福精密电子有限公司 | Direct current voltage stabilizing circuit |
| CN103457461B (en) * | 2013-09-10 | 2016-01-20 | 昆山龙仕达电子材料有限公司 | A kind of direct current regulation circuit |
| CN109038504A (en) * | 2015-03-09 | 2018-12-18 | 王振环 | DC power supply hiccup formula protects circuit |
| CN109038503A (en) * | 2015-03-09 | 2018-12-18 | 王振环 | DC power supply hiccup formula protects circuit |
| CN108683354A (en) * | 2018-05-28 | 2018-10-19 | 红河学院 | A kind of pulse frequency modulated convertor circuit |
| CN108683354B (en) * | 2018-05-28 | 2024-02-02 | 红河学院 | Pulse frequency modulation converter circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1278482C (en) | 2006-10-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9083189B2 (en) | Device and method for equalizing voltages of energy-storage elements | |
| CN101064468A (en) | Dc-to-dc converter and electric motor drive system using the same | |
| CN1080477C (en) | Circuit for detecting overcharging and overdischarging | |
| CN1893247A (en) | Multi-power supply circuit and multi-power supply method | |
| CN111525815A (en) | Bidirectional DCDC conversion circuit, energy storage converter and charge-discharge control method | |
| CN101674008A (en) | Discharge control device capable of regulating output current | |
| CN113794373B (en) | Multi-level direct current converter and power supply system | |
| CN111786555B (en) | Zero-ripple high-gain DC-DC converter based on novel boosting unit | |
| CN1278482C (en) | Low-voltage D.C. power supply circuit | |
| CN207368879U (en) | A kind of quasi- boost switching DC/DC converters of the high-gain of low voltage stress | |
| CN1549420A (en) | Charger capable of using battery base as bidirectional output and input | |
| CN101030734A (en) | Single-phase and triple-phase impedance source booster and step-down DC/DC converter | |
| CN2643541Y (en) | A low-voltage DC power source circuit | |
| Hariraman et al. | Asymmetrical Supercapacitor based solar powered automatic emergency light | |
| CN1107376C (en) | AC or bipolar equivalent or non-equipment application circuit of polar capacity | |
| CN200969527Y (en) | Charger circuit and its charger | |
| CN1885669A (en) | Rechargeable battery charging method and its device | |
| CN1829039A (en) | Battery-operated equipment | |
| CN110460080B (en) | Voltage compensation type battery energy storage converter and control method thereof | |
| CN208094446U (en) | A kind of high power UPS | |
| CN207134988U (en) | A kind of Buck converters of multichannel input | |
| CN102931704B (en) | Solar energy and piezoelectricity power generation complementary charger | |
| CN1941576A (en) | DC/DC converter with inductor current sensing capability | |
| CN1889324A (en) | Battery secondary balancing charging apparatus and method | |
| CN205622503U (en) | Accurate Z source type booster converter of switch |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20061004 Termination date: 20100611 |