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A LED lamp based on thyristor constant current

A technology of LED lamps and LED light strings, which is applied in the direction of electric lamp circuit layout, lighting devices, light sources, etc., can solve the problems of easy damage to filter electrolytic capacitors and power tubes, complex structural circuits, and high production costs, and achieve reliable performance and small size , low cost effect

Inactive Publication Date: 2016-10-19
广州荣基能亮节能科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the power supply of most LED lamps adopts PWM constant current power supply, and its circuit is composed of rectification filter, PWM integrated circuit, transformer, power tube drive, etc. This structure circuit is complex and the production cost is high. At the same time, due to the high voltage after rectification, the filter electrolysis Capacitors and power tubes are easily damaged and have poor reliability

Method used

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  • A LED lamp based on thyristor constant current
  • A LED lamp based on thyristor constant current
  • A LED lamp based on thyristor constant current

Examples

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Embodiment Construction

[0025] refer to figure 1 with image 3 , a LED lamp based on a thyristor constant current of the present invention includes a main loop and a negative feedback loop, and along the main loop includes: a rectifier circuit 1, an LED lamp string 2 and a thyristor current regulating circuit 3; The rectifier circuit 1 preferably adopts a bridge-type half-wave rectifier, including four diodes. The rectifier circuit 1 directly rectifies power from the 220V AC, and outputs it to the LED lamp string 2; the LED lamp string 2 is connected to the rectified AC power Step down, the step-down value of the LED light string 2 determines the allowable minimum power supply voltage, if it is lower than the allowable value, the predetermined power cannot be reached;

[0026] Along the negative feedback loop, it also includes: a current detection circuit 4 and a microcontroller 5; the current detection circuit 4 is used to provide feedback information on the circuit main loop for the microcontrolle...

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Abstract

The invention discloses an LED lamp based on a thyristor constant current. The rectifier circuit adopts a bridge half-wave rectifier circuit, the LED lamp string steps down the rectified voltage, and the current detection circuit detects the current of the LED lamp string and adjusts the voltage of the LED lamp string. The controller forms a negative feedback, and the microcontroller controls the conduction angle of the thyristor to adjust the current, thereby realizing the constant current of the circuit. The circuit of the invention does not need to be driven by electrolytic capacitors, transformers, field effect transistors or transistors, and has the advantages of simple circuit, reliable performance, low cost, small size, less heat generation and good stability.

Description

technical field [0001] The invention relates to an LED lamp, in particular to an LED lamp based on a thyristor constant current. Background technique [0002] At present, with the further dissemination and promotion of the concept of energy saving and environmental protection, LED lighting technology is developing rapidly. In order to accelerate the popularization of LED fluorescent tubes and LED downlights, the commercial market urgently needs LED lamps with simple circuits, reliable performance, and low prices. At present, the power supply of most LED lamps adopts PWM constant current power supply, and its circuit is composed of rectification filter, PWM integrated circuit, transformer, power tube drive, etc. This structure circuit is complex and the production cost is high. At the same time, due to the high voltage after rectification, the filter electrolysis Capacitors and power tubes are easily damaged and have poor reliability. Contents of the invention [0003] In ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02
Inventor 伍活民关俊明陈文锡
Owner 广州荣基能亮节能科技有限公司
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