CN202363953U - Constant current control circuit - Google Patents
Constant current control circuit Download PDFInfo
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- CN202363953U CN202363953U CN2011204519527U CN201120451952U CN202363953U CN 202363953 U CN202363953 U CN 202363953U CN 2011204519527 U CN2011204519527 U CN 2011204519527U CN 201120451952 U CN201120451952 U CN 201120451952U CN 202363953 U CN202363953 U CN 202363953U
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- resistance
- control circuit
- triode
- constant
- current control
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Abstract
The utility model relates to a constant current source control circuit. The constant current control circuit, an output end of a transformer T is connected with a rectification circuit, and the constant current control circuit is characterized in that an input end of the transformer T is connected with a switch control circuit; the rectification circuit is connected with a resistor R3; an emitter junction of a triode VT is connected with the resistor R3 in parallel; a collector junction of the triode VT is connected with a light-emitting tube of an optoelectronic coupler LV in series; and an output end of the optoelectronic coupler LV is connected with the transformer T through the switch control circuit. The constant current control circuit is simple in structure, smart in design concept, low in cost, low in component energy consumption and low in noise, and can keep circuit current constant.
Description
Technical field
The utility model relates to a kind of constant current source control circuit.
Background technology
Constant-current circuit is a kind of circuit that constant current is provided to load.It both can be used as its active load again for various amplifying circuits provide bias current to stablize its quiescent point, with the raising multiplication factor, and in differential amplifier circuit, pulse-generating circuit etc., had obtained extensive use.
For example, charge in batteries need carry out constant current control, but present constant-current control circuit is often very complicated in design, and cost is higher, thereby needs a kind of simple and practical constant-current control circuit.
Summary of the invention
The utility model is exactly to the problems referred to above, proposes a kind of constant-current control circuit.This constant-current control circuit can be implemented in the constant current charge in the battery charging process.
The technical scheme that the utility model provides is:
Constant-current control circuit; The output of transformer T connects rectification circuit; The input of transformer T is connected with ON-OFF control circuit, and rectification circuit is connected with resistance R 3, and the emitter junction of triode VT is parallelly connected with resistance R 3; The collector junction of triode VT is connected with the luminous tube of photoelectrical coupler LV, and the output of photoelectrical coupler LV connects transformer T through ON-OFF control circuit.
Concrete, the cathode output end of rectification circuit is connected with resistance R 3, and the emitter junction of triode VT is parallelly connected with resistance R 3.
Concrete, the cathode output end of rectification circuit is connected with resistance R 3, and the emitter junction of triode VT is parallelly connected with resistance R 3.
Concrete, the base stage of triode VT and resistance R 3 are connected through diode, and diode is connected anodal B3 with the common port of triode VT base stage through resistance R 1.
Concrete, the base stage of triode VT is connected through diode, resistance R 2 with resistance R 3 successively, and the common port of triode VT base stage and diode is connected with anodal B3 through resistance R 1.
Concrete, the base stage of triode VT is connected through resistance R 2, diode with resistance R 3 successively, and the common port of resistance R 2 and triode VT base stage is connected with anodal B3 through resistance R 1.
Concrete, said diode is a voltage stabilizing didoe, voltage stabilizing didoe is connected with anodal B3 through resistance R 1 with the common port of triode VT base stage.
Concrete, between the common port of voltage stabilizing didoe and resistance R 1 and triode VT base stage, be connected through resistance R 4, be connected through resistance R 5 between the common port of the common port of resistance R 4 and triode VT base stage and resistance R 3 and voltage stabilizing didoe.
When circuital current was excessive, the voltage at resistance R 3 two ends raise, and transistor collector electric current I c increases, and through ON-OFF control circuit control and then make the output voltage of transformer reduce, made the flow through electric current of load reduce, and recovered steady state value.
When circuital current was too small, the voltage at resistance R 3 two ends reduced, and transistor collector electric current I c reduces, and through ON-OFF control circuit control and then make the output voltage of transformer increase, made the flow through electric current of load increase, and recovered steady state value.
The utility model is through the variation of the voltage at resistance R 3 two ends, and the electric current of testing circuit changes, and the triode amplifying signal also passes through photoelectrical coupler control switch control circuit, thereby the input power of control transformer makes the output current of transformer keep constant current.
The utility model is simple in structure, and design concept is ingenious, and is with low cost, and the components and parts power consumption is low, and noise is low.
Description of drawings
Fig. 1 is the structural representation of embodiment 1.
Fig. 2 is the structural representation of embodiment 2.
Fig. 3 is the structural representation of embodiment 3.
Fig. 4 is the structural representation of embodiment 4.
Fig. 5 is the structural representation of embodiment 5.
Fig. 6 is the structural representation of embodiment 6.
Embodiment
Constant-current control circuit, the output of transformer T connects rectification circuit, and rectification circuit is connected with load L.The input of transformer T is connected with ON-OFF control circuit.The output of rectification circuit is connected with load L.Be connected with resistance R 3 between the cathode output end of rectification circuit and the load L.The common port of resistance R 3 and load L is connected with an end of resistance R 2, and the other end of resistance R 2 is connected with the negative pole of diode D2, and the positive pole of diode D2 links to each other with resistance R 1 with the base stage of triode VT respectively, and the other end of resistance R 1 connects anodal B3.The emitter of triode VT connects the common port of rectification circuit and resistance R 3.The collector electrode of triode connects the port one of photoelectrical coupler LV.The port 2 of photoelectrical coupler LV is connected with anodal B2.The output of photoelectrical coupler LV is connected with the input of transformer T through control circuit.
Constant-current control circuit, the output of transformer T connects rectification circuit, and rectification circuit is connected with load L.The input of transformer T is connected with ON-OFF control circuit.The output of rectification circuit is connected with load L.Be connected with resistance R 3 between the cathode output end of rectification circuit and the load.The common port of resistance R 3 and load is connected with the negative pole of diode D2.The positive pole of diode D3 is connected with the common port of triode VT base stage and resistance R 1 through resistance R 2.The other end of resistance R 1 is connected with anodal B3.The emitter of triode VT is connected with the common port of rectification circuit with resistance R 3.The collector electrode of triode VT is connected with the port one of photoelectrical coupler.The port 2 of photoelectrical coupler is connected with anodal B2.The output 3,4 of photoelectrical coupler is connected with transformer T through control circuit.
Constant-current control circuit, the output of transformer T connects rectification circuit, and rectification circuit is connected with load L.The input of transformer T is connected with ON-OFF control circuit.The output of rectification circuit is connected with load L.Be connected with resistance R 3 between the cathode output end of rectification circuit and the load.The common port of resistance R 3 and load is connected with the positive pole of voltage stabilizing didoe D3.The negative pole of voltage stabilizing didoe D3 is connected with anodal B3 through resistance R 1.The negative pole of voltage stabilizing didoe D3 also is connected with the base stage of triode VT through resistance R 4.The common port of resistance R 4 and triode VT base stage is connected through resistance R 5 with the common port of resistance R 3 and voltage stabilizing didoe D3.The emitter of triode VT connects the common port of rectification circuit and resistance R 3.The collector electrode of triode VT is connected with the port one of photoelectrical coupler.The port 2 of photoelectrical coupler is connected with anodal B2.The output 3,4 of photoelectrical coupler is connected with transformer T through control circuit.
Constant-current control circuit, the output of transformer T connects rectification circuit, and rectification circuit is connected with load L.The input of transformer T is connected with ON-OFF control circuit.The output of rectification circuit is connected with load L.Be connected with resistance R 3 between the cathode output end of rectification circuit and the load.The common port of resistance R 3 and load is connected with the positive pole of diode D2.The negative pole of diode D2 connects resistance R 2.Resistance R 2 connects base stage and the resistance R 1 of triode VT respectively.The other end of resistance R 1 is connected with anodal B3.The emitter of triode VT is connected with the common port of resistance R 3 and rectification circuit.The collector electrode of triode VT is connected with the port one of photoelectrical coupler.The port 2 of photoelectrical coupler is connected with anodal B2.The output 3,4 of photoelectrical coupler is connected with transformer T through control circuit.
Embodiment 5
Constant-current control circuit, the output of transformer T connects rectification circuit, and rectification circuit is connected with load L.The input of transformer T is connected with ON-OFF control circuit.The output of rectification circuit is connected with load L.Be connected with resistance R 3 between the cathode output end of rectification circuit and the load.The common port of resistance R 3 and load is connected with resistance R 2.The other end of resistance R 2 is connected with the positive pole of diode D2.The negative pole of diode D2 connects base stage and the resistance R 1 of triode VT respectively.The other end of resistance R 1 is connected with anodal B3.The emitter of triode VT is connected with the common port of resistance R 3 and rectification circuit.The collector electrode of triode VT is connected with the port one of photoelectrical coupler.The port 2 of photoelectrical coupler is connected with anodal B2.The output 3,4 of photoelectrical coupler is connected with transformer T through control circuit.
Embodiment 6
Constant-current control circuit, the output of transformer T connects rectification circuit, and rectification circuit is connected with load L.The input of transformer T is connected with ON-OFF control circuit.The output of rectification circuit is connected with load L.Be connected with resistance R 3 between the cathode output end of rectification circuit and the load.The common port of resistance R 3 and load is connected with the negative pole of voltage stabilizing didoe D3.The positive pole of voltage stabilizing didoe D3 is connected with anodal B3 through resistance R 1.The positive pole of voltage stabilizing didoe D3 also is connected with the base stage of triode VT through resistance R 4.The common port of resistance R 4 and triode VT base stage is connected through resistance R 5 with the common port of resistance R 3 and voltage stabilizing didoe D3.The emitter of triode VT connects the common port of rectification circuit and resistance R 3.The collector electrode of triode VT is connected with the port one of photoelectrical coupler.The port 2 of photoelectrical coupler is connected with anodal B2.The output 3,4 of photoelectrical coupler is connected with transformer T through control circuit.
Claims (8)
1. constant-current control circuit; The output of transformer T connects rectification circuit, it is characterized in that the input of transformer T is connected with ON-OFF control circuit; Rectification circuit is connected with resistance R 3; The emitter junction of triode VT is parallelly connected with resistance R 3, and the collector junction of triode VT is connected with the luminous tube of photoelectrical coupler LV, and the output of photoelectrical coupler LV connects transformer T through ON-OFF control circuit.
2. according to the said constant-current control circuit of claim 1, it is characterized in that the cathode output end of rectification circuit is connected with resistance R 3, the emitter junction of triode VT is parallelly connected with resistance R 3.
3. according to the said constant-current control circuit of claim 1, it is characterized in that the cathode output end of rectification circuit is connected with resistance R 3, the emitter junction of triode VT is parallelly connected with resistance R 3.
4. according to claim 1 or 2 or 3 said constant-current control circuits, it is characterized in that the base stage of triode VT and resistance R 3 are connected through diode, diode is connected anodal B3 with the common port of triode VT base stage through resistance R 1.
5. according to the said constant-current control circuit of claim 4, it is characterized in that the base stage of triode VT is connected through diode, resistance R 2 with resistance R 3 successively, the common port of triode VT base stage and diode is connected with anodal B3 through resistance R 1.
6. according to the said constant-current control circuit of claim 4, it is characterized in that the base stage of triode VT is connected through resistance R 2, diode with resistance R 3 successively, the common port of resistance R 2 and triode VT base stage is connected with anodal B3 through resistance R 1.
7. according to the said constant-current control circuit of claim 4, it is characterized in that said diode is a voltage stabilizing didoe, voltage stabilizing didoe is connected with anodal B3 through resistance R 1 with the common port of triode VT base stage.
8. according to the said constant-current control circuit of claim 7; It is characterized in that; Between the common port of voltage stabilizing didoe and resistance R 1 and triode VT base stage, be connected, be connected through resistance R 5 between the common port of the common port of resistance R 4 and triode VT base stage and resistance R 3 and voltage stabilizing didoe through resistance R 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204519527U CN202363953U (en) | 2011-11-16 | 2011-11-16 | Constant current control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204519527U CN202363953U (en) | 2011-11-16 | 2011-11-16 | Constant current control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN202363953U true CN202363953U (en) | 2012-08-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204519527U Expired - Fee Related CN202363953U (en) | 2011-11-16 | 2011-11-16 | Constant current control circuit |
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| CN (1) | CN202363953U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113452155A (en) * | 2021-07-16 | 2021-09-28 | 黄石邦柯科技股份有限公司 | Self-adaptive starting optimal frequency wireless energy transfer device |
-
2011
- 2011-11-16 CN CN2011204519527U patent/CN202363953U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113452155A (en) * | 2021-07-16 | 2021-09-28 | 黄石邦柯科技股份有限公司 | Self-adaptive starting optimal frequency wireless energy transfer device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20141116 |
|
| EXPY | Termination of patent right or utility model |