CN204291458U - The power supply of automatic stabilisation operating voltage and electric current and light fixture - Google Patents
The power supply of automatic stabilisation operating voltage and electric current and light fixture Download PDFInfo
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- CN204291458U CN204291458U CN201420714358.6U CN201420714358U CN204291458U CN 204291458 U CN204291458 U CN 204291458U CN 201420714358 U CN201420714358 U CN 201420714358U CN 204291458 U CN204291458 U CN 204291458U
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Abstract
The power supply of a kind of automatic stabilisation operating voltage and electric current and light fixture, be characterized in that power acquisition electric capacity, resistance step-down and rectifier circuit rectifies 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; Light fixture comprises employing electric capacity, resistance step-down and rectification circuit and direct current luminescent device, it is characterized in that: in A, B point direct current loop after rectification circuit, be parallel with electric capacity C2, resistance R2, resistance R3 is in series with between A point and power supply output cathode, between B point and power supply output negative pole, be in series with the voltage stabilizing didoe VD of reverse-conducting place in circuit, described luminescent device is contact resistance R3 rear end and voltage stabilizing didoe VD negative pole end respectively.Advantage is energy automatic stabilisation output services voltage and currents, and caloric value is little, and volume is little.
Description
Technical field
The utility model relates to a kind of power supply and light fixture, particularly the power supply of a kind of automatic stabilisation operating voltage and electric current and light fixture.
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.
Utility model content
The purpose of this utility model 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 and light fixture.
Solution of the present utility model 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.
The light fixture of a kind of automatic stabilisation operating voltage and electric current, comprise and adopt electric capacity, resistance step-down and rectification circuit and direct current luminescent device, it is characterized in that: in A, B point direct current loop after rectification circuit, be parallel with electric capacity C2, resistance R2, resistance R3 is in series with between A point and power supply output cathode, between B point and power supply output negative pole, be in series with the voltage stabilizing didoe VD of reverse-conducting place in circuit, described luminescent device is contact resistance R3 rear end and voltage stabilizing didoe VD negative pole end respectively.
The utility model has the advantages that energy automatic stabilisation output services voltage and current, caloric value is little, and volume is little.
Accompanying drawing explanation
Fig. 1 is the circuit theory diagrams of the utility model power supply.
Fig. 2 is the circuit theory diagrams of the utility model for light fixture embodiment one.
Fig. 3 is the circuit theory diagrams of the utility model 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 (2)
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.
2. the light fixture adopting power supply according to claim 1 to manufacture, comprise and adopt electric capacity, resistance step-down and rectifier circuit rectifies and direct current luminescent device, it is characterized in that: in A, B point direct current loop after rectification circuit, be parallel with electric capacity C2, resistance R2, resistance R3 is in series with between A point and power supply output cathode, between B point and power supply output negative pole, be in series with the voltage stabilizing didoe VD of reverse-conducting place in circuit, described luminescent device is contact resistance R3 rear end and voltage stabilizing didoe VD negative pole end respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420714358.6U CN204291458U (en) | 2014-11-25 | 2014-11-25 | The power supply of automatic stabilisation operating voltage and electric current and light fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420714358.6U CN204291458U (en) | 2014-11-25 | 2014-11-25 | The power supply of automatic stabilisation operating voltage and electric current and light fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204291458U true CN204291458U (en) | 2015-04-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420714358.6U Active CN204291458U (en) | 2014-11-25 | 2014-11-25 | The power supply of automatic stabilisation operating voltage and electric current and light fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204291458U (en) |
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2014
- 2014-11-25 CN CN201420714358.6U patent/CN204291458U/en active Active
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