CN104320009A - Power source for automatically stabilizing working voltages and currents - Google Patents
Power source for automatically stabilizing working voltages and currents Download PDFInfo
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- CN104320009A CN104320009A CN201410684295.9A CN201410684295A CN104320009A CN 104320009 A CN104320009 A CN 104320009A CN 201410684295 A CN201410684295 A CN 201410684295A CN 104320009 A CN104320009 A CN 104320009A
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- power supply
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Abstract
Disclosed is a power source for automatically stabilizing working voltages and currents. A capacitor and a resistor are used for voltage reduction, a rectifying circuit is used for rectification, and direct currents are obtained. The power source is characterized in that a capacitor C2 and a resistor R2 are connected in an A-point and B-point direct-current circuit behind the rectifying circuit in parallel, a resistor R3 is connected between a point A and an output positive electrode of the power source in series, and a voltage-stabilization diode VD connected into the circuit in a reverse breakover mode is connected between a point B and an output negative electrode of the power source in series. The power source has the advantages that the output working voltages and currents can be automatically stabilized, the heating amount is small, and the size is small.
Description
Technical field
The present invention relates to a kind of power supply, particularly the power supply of a kind of automatic stabilisation operating voltage and electric current.
Background technology
Tradition adopts electric capacity, resistance step-down and rectifier circuit rectifies to obtain DC power supply, its operating voltage exported and electric current can be followed the variation of input voltage and change, as needed regulated output voltage, more complicated voltage stabilizing circuit need be adopted to carry out voltage stabilizing, common voltage stabilizing circuit or light fixture are provided with the radiator of different size according to its power output size, make power supply huge, radiating effect is poor, directly affects the life-span of power supply or light fixture.
Summary of the invention
Object of the present invention is just to provide energy automatic stabilisation output services voltage and current, and caloric value is little, the power supply of the automatic stabilisation operating voltage that volume is little and electric current.
Solution of the present invention is such:
The power supply of a kind of automatic stabilisation operating voltage and electric current, adopt electric capacity, resistance step-down and rectifier circuit rectifies to obtain direct current, it is characterized in that: in A, B point direct current loop after rectification circuit, be parallel with electric capacity C2, resistance R2, between A point and power supply output cathode, be in series with resistance R3, between B point and power supply output negative pole, be in series with the voltage stabilizing didoe VD of reverse-conducting place in circuit.
Advantage of the present invention is energy automatic stabilisation output services voltage and currents, and caloric value is little, and volume is little.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of power supply of the present invention.
Fig. 2 is the circuit theory diagrams of the present invention for light fixture embodiment one.
Fig. 3 is the circuit theory diagrams of the present invention for light fixture embodiment two.
Embodiment
In power supply as shown in Figure 1, adopt electric capacity C1, resistance R1 step-down and the rectifier circuit rectifies that is made up of diode D1, D2, D3, D4 to obtain direct current, electric capacity C2, resistance R2 is parallel with in A, B point direct current loop after rectification circuit, between A point and power supply output cathode, be in series with resistance R3, between B point and power supply output negative pole, be in series with the voltage stabilizing didoe VD of reverse-conducting place in circuit.
The operation principle of power supply shown in Fig. 1 and the process of automatic stabilisation operating voltage and electric current as follows:
Input access 220V AC power, after electric capacity C1, resistance R1 step-down, direct current is obtained by diode D1, D2, D3, D4 rectification, and electric capacity C2 is charged, direct current exports through resistance R3, flows through the negative pole that load RL arrives zener diode VD, after now voltage reaches the voltage of zener diode VD reverse-conducting, zener diode VD conducting, load RL sends a telegram in reply work.After zener diode VD conducting, the voltage at its two ends drops quickly to lower than its conducting voltage, zener diode VD ends, load RL quits work, after zener diode cut-off, its cathode voltage to be climbed to again after conducting voltage conducting again and to repeat the action of conducting, cut-off, by fast conducting and the cut-off of zener diode VD, makes to be remained in a constant basis by the operating current of load RL.When input alternating voltage reduces; the direct voltage exported also reduces; voltage on voltage stabilizing didoe negative pole is lower than conducting voltage; zener diode VD ends; circuit does not work; now; direct current after diode D1, D2, D3, D4 rectification alternately charges to electric capacity C2; electric capacity C2 both end voltage rises and reaches operating voltage; zener diode VD cathode voltage reaches conducting voltage and conducting, and load RL works, and the electric current of electric capacity C2 can bleed off by shunt resistance R2; electric current can hinder by resistance flowing resistance R3 late, protection load RL.
The work of automatic stabilisation output services voltage and current is realized by voltage stabilizing didoe VD, zener diode VD fast conducting and cut-off, make the electric current relative constancy flowing through zener diode VD during each conducting, also the operating current relative constancy of load RL is just realized, and only when alternating current voltage reduces, export DC voltage and reduce, when voltage stabilizing didoe VD cathode voltage ends lower than conducting voltage, just to electric capacity C2 alternately charging, the voltage at electric capacity C2 two ends can be promoted.
Light fixture shown in Fig. 2, adopt electric capacity C1, resistance R1 step-down and by diode D1, D2, D3, the rectifier circuit rectifies of D4 composition and direct current luminescent device K, A after rectification circuit, B point direct current is parallel with electric capacity C2 in loop, resistance R2, resistance R3 is in series with between A point and power supply output cathode, the voltage stabilizing didoe VD of reverse-conducting place in circuit is in series with between B point and power supply output negative pole, luminescent device K is individual devices, its two ends are contact resistance R3 rear end and voltage stabilizing didoe VD negative pole end respectively, power supply and luminescent device K are installed as one, be light fixture of the present invention.
Luminescent device K can be any one light-emitting component, as bulb, LED light source etc.
The operation principle of light fixture shown in Fig. 2 and automatic stabilisation operating voltage consistent with power supply shown in Fig. 1 with the process of electric current.
Its luminescent device of light fixture shown in Fig. 3 K is the structure of many series connection, difference contact resistance R3 rear end and voltage stabilizing didoe VD negative pole end after series connection; Its operation principle and automatic stabilisation operating voltage consistent with power supply shown in Fig. 1 with the process of electric current.
Claims (1)
1. the power supply of an automatic stabilisation operating voltage and electric current, adopt electric capacity, resistance step-down and rectifier circuit rectifies to obtain direct current, it is characterized in that: in A, B point direct current loop after rectification circuit, be parallel with electric capacity C2, resistance R2, between A point and power supply output cathode, be in series with resistance R3, between B point and power supply output negative pole, be in series with the voltage stabilizing didoe VD of reverse-conducting place in circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410684295.9A CN104320009A (en) | 2014-11-25 | 2014-11-25 | Power source for automatically stabilizing working voltages and currents |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410684295.9A CN104320009A (en) | 2014-11-25 | 2014-11-25 | Power source for automatically stabilizing working voltages and currents |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104320009A true CN104320009A (en) | 2015-01-28 |
Family
ID=52375206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410684295.9A Pending CN104320009A (en) | 2014-11-25 | 2014-11-25 | Power source for automatically stabilizing working voltages and currents |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104320009A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106163014A (en) * | 2016-08-31 | 2016-11-23 | 周鸿德 | LED with inductance step-down |
-
2014
- 2014-11-25 CN CN201410684295.9A patent/CN104320009A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106163014A (en) * | 2016-08-31 | 2016-11-23 | 周鸿德 | LED with inductance step-down |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150128 |
|
| WD01 | Invention patent application deemed withdrawn after publication |