CN211297059U - Control circuit for controlling conduction size of controlled silicon by identifying output load size - Google Patents
Control circuit for controlling conduction size of controlled silicon by identifying output load size Download PDFInfo
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- CN211297059U CN211297059U CN202020204118.7U CN202020204118U CN211297059U CN 211297059 U CN211297059 U CN 211297059U CN 202020204118 U CN202020204118 U CN 202020204118U CN 211297059 U CN211297059 U CN 211297059U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]
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Abstract
The utility model relates to a LED control circuit, in particular to a control circuit for controlling the conduction size of a silicon controlled rectifier by identifying the output load size; the power supply circuit comprises a power supply circuit, a load circuit and a control circuit; the power circuit comprises a bridge rectifier, a first resistor, a first capacitor and a DC-to-DC converter; wherein the load circuit comprises a plurality of LED lamps with switches; the control circuit comprises a field effect tube, a comparator, a second resistor, a third resistor, a fourth resistor and a second capacitor; firstly, commercial power is converted into direct current available for an LED through a bridge rectifier, surge current is restrained through a first resistor and a first capacitor, then voltage drop sampling is carried out on a load circuit through a fourth resistor, if the voltage drop is larger than reference voltage, the conduction angle of a field effect tube is reduced, otherwise, the conduction angle is increased, and therefore conduction is controlled through a load.
Description
Technical Field
The utility model relates to a LED control circuit, especially a control circuit who controls the silicon controlled rectifier through discernment output load size and switches on size.
Background
A plurality of LED lamps are usually disposed in the LED lamp panel, and usually, the LED lamps are connected in parallel. Some occasions can be adjusted according to different illumination and select the load, for example in the light filling system that the plant was cultivateed, select to turn on a small amount of several LED lamps when natural illumination is more sufficient, need to turn on entirely when natural illumination is not enough. In the prior art, the conduction quantity of a power supply is unchanged no matter whether the load is the same or not, so that the service life of the LED lamp is easily reduced.
Disclosure of Invention
The utility model provides a not enough to prior art, the utility model provides a control circuit of silicon controlled rectifier switch on size is controlled through discernment output load size.
The technical scheme of the utility model is that:
control circuit of silicon controlled rectifier switch on size through discernment output load size, its characterized in that: the power supply circuit comprises a power supply circuit, a load circuit and a control circuit;
the power circuit comprises a bridge rectifier, a first resistor, a first capacitor and a DC-to-DC converter;
wherein the load circuit comprises a plurality of LED lamps with switches;
the control circuit comprises a field effect tube, a comparator, a second resistor, a third resistor, a fourth resistor and a second capacitor;
the AC zero-live wire is respectively connected with two input ends of a bridge rectifier, the positive electrode of the bridge rectifier is connected with a first end of a first resistor, a second end of the first resistor is respectively connected with the positive electrode of a first capacitor and a first input end of a DC-to-DC converter, the negative electrode of the bridge rectifier is respectively connected with the negative electrode of the first capacitor and a second input end of the DC-to-DC converter, the first output end of the DC-to-DC converter is connected with the input end of a load circuit, the second output end of the DC-to-DC converter is connected with the output end of the load circuit, the input end of the load circuit is also respectively connected with a first end of a fourth resistor and a source electrode of a field effect tube, the fourth resistor is connected with a first end of a second capacitor, the second end of the second capacitor is respectively connected with the output end of a comparator and a grid electrode of the field effect tube, the positive input end, and the negative input end of the comparator is connected with the first end of the third resistor, and the second end of the third resistor is connected with the reference voltage.
Further, all the switched LED lamps in the load circuit are connected in parallel.
Further, the first capacitor is an electrolytic capacitor.
Further, the field effect transistor adopts TRFP 460.
The utility model has the advantages that: firstly, commercial power is converted into direct current available for an LED through a bridge rectifier, surge current is restrained through a first resistor and a first capacitor, then voltage drop sampling is carried out on a load circuit through a fourth resistor, if the voltage drop is larger than reference voltage, the conduction angle of a field effect tube is reduced, otherwise, the conduction angle is increased, and therefore conduction is controlled through a load.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings:
as shown in fig. 1, a control circuit for controlling the conduction size of a thyristor by identifying the output load size is characterized in that: comprises a power supply circuit, a load circuit L1 and a control circuit;
the power circuit comprises a bridge rectifier D1, a first resistor R1, a first capacitor C1 and a DC-to-DC converter A1;
wherein the load circuit L1 includes a plurality of LED lights with switches;
the control circuit comprises a field effect transistor Q1, a comparator OP1, a second resistor R2, a third resistor R3, a fourth resistor R4 and a second capacitor C2;
the alternating current zero-live wire is respectively connected with two input ends of a bridge rectifier D1, the anode of the bridge rectifier D1 is connected with the first end of a first resistor R1, the second end of the first resistor R1 is respectively connected with the anode of a first capacitor C1 and the first input end of a DC-DC converter A1, the cathode of the bridge rectifier D1 is respectively connected with the cathode of a first capacitor C1 and the second input end of a DC-DC converter A1, the first output end of the DC-DC converter A1 is connected with the input end of a load circuit L1, the second output end of the DC-DC converter A1 is connected with the output end of a load circuit L1, the input end of the load circuit L1 is also respectively connected with the first end of a fourth resistor R4 and the source of a field effect tube Q1, the fourth resistor R4 is connected with the first end of a second capacitor C2, the second end of the second capacitor C2 is respectively connected with the output end of a comparator OP 5 and the gate of a field effect tube Q57323, the anode of the comparator R2 is connected with the second input end of the second resistor R, the second end of the second resistor R2 is grounded, the negative input terminal of the comparator OP1 is connected to the first end of the third resistor R3, and the second end of the third resistor R3 is connected to the reference voltage VREF.
All the switched LED lamps in the load circuit L1 are connected in parallel.
The first capacitor C1 is an electrolytic capacitor.
The field effect tube adopts TRFP 460.
The foregoing embodiments and description have been provided to illustrate the principles and preferred embodiments of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which fall within the scope of the invention as claimed.
Claims (4)
1. Control circuit of silicon controlled rectifier switch on size through discernment output load size, its characterized in that: the power supply circuit comprises a power supply circuit, a load circuit and a control circuit;
the power circuit comprises a bridge rectifier, a first resistor, a first capacitor and a DC-to-DC converter;
wherein the load circuit comprises a plurality of LED lamps with switches;
the control circuit comprises a field effect tube, a comparator, a second resistor, a third resistor, a fourth resistor and a second capacitor;
the AC zero-live wire is respectively connected with two input ends of a bridge rectifier, the positive electrode of the bridge rectifier is connected with a first end of a first resistor, a second end of the first resistor is respectively connected with the positive electrode of a first capacitor and a first input end of a DC-to-DC converter, the negative electrode of the bridge rectifier is respectively connected with the negative electrode of the first capacitor and a second input end of the DC-to-DC converter, the first output end of the DC-to-DC converter is connected with the input end of a load circuit, the second output end of the DC-to-DC converter is connected with the output end of the load circuit, the input end of the load circuit is also respectively connected with a first end of a fourth resistor and a source electrode of a field effect tube, the fourth resistor is connected with a first end of a second capacitor, the second end of the second capacitor is respectively connected with the output end of a comparator and a grid electrode of the field effect tube, the positive input end, and the negative input end of the comparator is connected with the first end of the third resistor, and the second end of the third resistor is connected with the reference voltage.
2. The control circuit according to claim 1, wherein the thyristor is controlled to conduct according to the magnitude of the output load, and the control circuit comprises:
all the LED lamps with the switches in the load circuit are connected in parallel.
3. The control circuit according to claim 1, wherein the thyristor is controlled to conduct according to the magnitude of the output load, and the control circuit comprises:
the first capacitor is an electrolytic capacitor.
4. The control circuit according to claim 1, wherein the thyristor is controlled to conduct according to the magnitude of the output load, and the control circuit comprises:
the field effect tube adopts TRFP 460.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020204118.7U CN211297059U (en) | 2020-02-25 | 2020-02-25 | Control circuit for controlling conduction size of controlled silicon by identifying output load size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020204118.7U CN211297059U (en) | 2020-02-25 | 2020-02-25 | Control circuit for controlling conduction size of controlled silicon by identifying output load size |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211297059U true CN211297059U (en) | 2020-08-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020204118.7U Active CN211297059U (en) | 2020-02-25 | 2020-02-25 | Control circuit for controlling conduction size of controlled silicon by identifying output load size |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211297059U (en) |
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2020
- 2020-02-25 CN CN202020204118.7U patent/CN211297059U/en active Active
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