CN204741605U - Elevator LED lamp plate constant current control circuit - Google Patents
Elevator LED lamp plate constant current control circuit Download PDFInfo
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- CN204741605U CN204741605U CN201520525862.6U CN201520525862U CN204741605U CN 204741605 U CN204741605 U CN 204741605U CN 201520525862 U CN201520525862 U CN 201520525862U CN 204741605 U CN204741605 U CN 204741605U
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Abstract
The utility model discloses an elevator LED lamp plate constant current control circuit has lamp plate circuit and constant current control circuit, the constant -current source circuit comprises first resistance, second resistance, electric capacity, field effect transistor, three -terminal steady voltage chip, control circuit is used for controlling the current control of lamp plate circuit. This kind of elevator LED lamp plate constant current control circuit is through adding a constant -current source circuit of compriseing field effect transistor and three -terminal steady voltage chip in the lamp plate circuit, for the lamp plate provide one kind more stablize, the error is littleer, the controllability is better power, ensured that the lamp plate can steadily work under various not stabilized power supply to improved the life of lamp plate, with low costs, simple and practical is fit for popularizing and applying.
Description
technical field:
the utility model relates to a kind of constant-current control circuit, particularly a kind of constant-current control circuit for elevator LED lamp panel.
background technology:
Now have the break-make controlling power supply simply generally all just compared at the elevator LED lamp panel control circuit used at present, thus the quality of its supply voltage and the lighting quality of lamp plate directly related, if but regular electric current and voltage occurs to fluctuate unstable situation, the useful life of lamp plate will be had a strong impact on, thus increase elevator operation cost.
summary of the invention:
it is simple and then effectively save the elevator control dial of repair and maintenance time without the need to dismounting control handwheel that the technical problems to be solved in the utility model is to provide a kind of structure.
For solving the problem, the utility model is achieved through the following technical solutions:
A kind of elevator LED lamp panel constant-current control circuit, there is the lamp plate circuit be made up of multiple lamp plate resistance and lamp plate diode, described constant-current control circuit also comprises a constant-current source circuit and diode, described constant-current source circuit is by the first resistance, second resistance, electric capacity, field effect transistor, three-terminal voltage-stabilizing chip forms, described first resistance and Capacitance parallel connection, one termination+24V power supply, the other end is extremely connected with the K of described three-terminal voltage-stabilizing chip, the K pole of described three-terminal voltage-stabilizing chip connects grid and first resistance of field effect transistor, its A pole ground connection GND, its VREF connects the source electrode of field effect transistor, the source electrode of described field effect transistor meets the VREF of the second resistance and three-terminal voltage-stabilizing chip, its grid connects the K pole of the first resistance and three-terminal voltage-stabilizing chip, its drain electrode connects the negative pole of diode, described second resistance one end ground connection GND, the source electrode of its another termination effect pipe and the VREF of three-terminal voltage-stabilizing chip, the negative pole of described diode connects the drain electrode of field effect transistor, positive pole connects lamp plate circuit, described lamp plate circuit anode connects+24V power supply, negative pole connects diode as preferably, described lamp plate circuit is connected in parallel by two groups of lamp plate parallel circuits, described lamp plate parallel circuit comprises seven lamp plate diodes and a lamp plate resistance.
Compared with prior art, usefulness of the present utility model is: this elevator LED lamp panel constant-current control circuit by adding a constant-current source circuit be made up of field effect transistor and three-terminal voltage-stabilizing chip in lamp plate circuit, there is provided to lamp plate that one is more stable, error is less, the better power supply of controllability, ensure that lamp plate can steady operation under various unstable power supply, and improve the useful life of lamp plate, cost is low, simple and practical, is applicable to applying.
accompanying drawing illustrates:
Below in conjunction with accompanying drawing, the utility model is further illustrated:
Fig. 1 is circuit connection diagram of the present utility model
In figure: 1, lamp plate resistance 2, lamp plate diode 3, lamp plate circuit 4, constant-current source circuit 5, diode
embodiment:
Below in conjunction with the drawings and the specific embodiments, the utility model is described in detail:
A kind of elevator LED lamp panel constant-current control circuit, as shown in Figure 1, there is the lamp plate circuit 3 be made up of multiple lamp plate resistance 1 and lamp plate diode 2, described constant-current control circuit also comprises a constant-current source circuit 4 and diode 5, described constant-current source circuit 4 is by the first resistance R1, second resistance R2, electric capacity C1, field effect transistor Q1, three-terminal voltage-stabilizing chip U1 forms, described first resistance R1 is in parallel with electric capacity C1, one termination+24V power supply, the other end is extremely connected with the K of described three-terminal voltage-stabilizing chip U1, the K pole of described three-terminal voltage-stabilizing chip U1 meets field effect transistor Q1 grid and the first resistance R1, its A pole ground connection GND, its VREF connects the source electrode of field effect transistor Q1, the source electrode of described field effect transistor Q1 meets the VREF of the second resistance R2 and three-terminal voltage-stabilizing chip U1, its grid connects the K pole of the first resistance R1 and three-terminal voltage-stabilizing chip U1, its drain electrode connects the negative pole of diode 5, described second resistance R2 one end ground connection GND, the source electrode of its another termination effect pipe Q1 and the VREF of three-terminal voltage-stabilizing chip U1, the negative pole of described diode 5 connects the drain electrode of field effect transistor Q1, positive pole connects lamp plate circuit 3, described lamp plate circuit 3 positive pole connects+24V power supply, negative pole connects diode 5, described lamp plate circuit 5 is connected in parallel by two groups of lamp plate parallel circuits, described lamp plate parallel circuit comprises seven lamp plate diodes 2 and a lamp plate resistance 1.
In specific implementation process, described elevator LED lamp panel constant-current control circuit, comprise one by electric capacity C1, first resistance R1, second resistance R2, the constant-current source circuit 4 that field effect transistor Q1 and three-terminal voltage-stabilizing chip U1 forms and diode 5, the lamp plate circuit 3 of the load lamp plate of lamp plate resistance 1 and alight plate diode 2 composition, described field effect transistor Q1 is preferably N-type channel MOS field effect transistor, described control circuit is used for the Current Control of control load lamp plate, by using three-terminal voltage-stabilizing chip U1 as a source of stable pressure, according to field effect transistor Q1 characteristic, make the second resistance both end voltage on field effect transistor Q1 source electrode constant, thus make current constant on source electrode, again according to the break-make characteristic of field effect transistor Q1, forward voltage is had between grid and source electrode, source electrode and drain electrode conducting, thus make drain electrode output current and current value is equal with source current and constant, ensure that the constant current supply of the lamp plate circuit in load lamp plate, above-mentioned elevator LED lamp panel constant-current control circuit is by building a constant-current source circuit, make controlled LED lamp panel current constant, solve the lamp plate damage because LED lamp panel electric current shakiness causes, light failure problem, use cost is low, precision is high, dependable performance.
It is emphasized that: be only preferred embodiment of the present utility model above, not any pro forma restriction is done to the utility model, every above embodiment is done according to technical spirit of the present utility model any simple modification, equivalent variations and modification, all still belong in the scope of technical solutions of the utility model.
Claims (2)
1. an elevator LED lamp panel constant-current control circuit, there is the lamp plate circuit (3) be made up of multiple lamp plate resistance (1) and lamp plate diode (2), it is characterized in that: described constant-current control circuit also comprises a constant-current source circuit (4) and diode (5), described constant-current source circuit (4) is by the first resistance (R1), second resistance (R2), electric capacity (C1), field effect transistor (Q1), three-terminal voltage-stabilizing chip (U1) forms, described first resistance (R1) is in parallel with electric capacity (C1), one termination+24V power supply, the other end is extremely connected with the K of described three-terminal voltage-stabilizing chip (U1), the K pole of described three-terminal voltage-stabilizing chip (U1) connects grid and first resistance (R1) of field effect transistor (Q1), its A pole ground connection GND, its VREF connects the source electrode of field effect transistor (Q1), the source electrode of described field effect transistor (Q1) meets the VREF of the second resistance (R2) and three-terminal voltage-stabilizing chip (U1), its grid connects the K pole of the first resistance (R1) and three-terminal voltage-stabilizing chip (U1), its drain electrode connects the negative pole of diode (5), described second resistance (R2) one end ground connection GND, the source electrode of its another termination field effect transistor (Q1) and the VREF of three-terminal voltage-stabilizing chip (U1), the negative pole of described diode (5) connects the drain electrode of field effect transistor (Q1), positive pole connects lamp plate circuit (3), described lamp plate circuit (3) positive pole connects+24V power supply, negative pole connects diode (5).
2. elevator LED lamp panel constant-current control circuit according to claim 1, is characterized in that: described lamp plate circuit (3) is connected in parallel by two groups of lamp plate parallel circuits, and described lamp plate parallel circuit comprises seven lamp plate diodes (2) and a lamp plate resistance (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520525862.6U CN204741605U (en) | 2015-07-20 | 2015-07-20 | Elevator LED lamp plate constant current control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520525862.6U CN204741605U (en) | 2015-07-20 | 2015-07-20 | Elevator LED lamp plate constant current control circuit |
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| Publication Number | Publication Date |
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| CN204741605U true CN204741605U (en) | 2015-11-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520525862.6U Active CN204741605U (en) | 2015-07-20 | 2015-07-20 | Elevator LED lamp plate constant current control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104994658A (en) * | 2015-07-20 | 2015-10-21 | 苏州新里程电控***有限公司 | An elevator LED lamp panel constant current control circuit |
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2015
- 2015-07-20 CN CN201520525862.6U patent/CN204741605U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104994658A (en) * | 2015-07-20 | 2015-10-21 | 苏州新里程电控***有限公司 | An elevator LED lamp panel constant current control circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200428 Address after: 215213, No. 888, Kang Li Avenue, Fen Hu hi tech Industrial Development Zone, Wujiang District, Jiangsu, Suzhou Patentee after: CANNY ELEVATOR Co.,Ltd. Address before: 215213, No. 799, Kang Li Avenue, Fen Hu hi tech Industrial Development Zone, Wujiang District, Jiangsu, Suzhou Patentee before: SUZHOU XINLICHENG ELECTRIC CONTROL SYSTEM Co.,Ltd. |
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| TR01 | Transfer of patent right |