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Direct-current high-voltage direct-driven LED circuit based on high-power passive harmonic filter

A technology of LED circuits and passive harmonics, applied in the field of electronics, can solve problems such as unusability, and achieve the effects of high reliability, small harmonic distortion and good economic benefits

Inactive Publication Date: 2015-04-29
INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

That is, the aforementioned invention cannot be used in occasions requiring high-power LEDs due to power limitations.

Method used

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  • Direct-current high-voltage direct-driven LED circuit based on high-power passive harmonic filter
  • Direct-current high-voltage direct-driven LED circuit based on high-power passive harmonic filter
  • Direct-current high-voltage direct-driven LED circuit based on high-power passive harmonic filter

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Experimental program
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Embodiment 1

[0033] see figure 2 , figure 2 It is a schematic diagram of a circuit with a power of 500W for the present invention. It consists of high-power passive harmonic filter HF, high-power AC rectification filter circuit BF and LED high-voltage high-power switch control circuit group connected in series. The LED high-voltage high-power switch control circuit group is composed of 4-stage LED high-voltage high-power switch control circuits EK1 to EK4. Among them, the high-power passive harmonic filter HF is composed of inductors L1, L2 and capacitors C1, C2, and C3. L1 and C1 are connected in parallel, one end of which is connected to the L end of the mains, and the other end is an output end of HF. C2 is connected in parallel, one end of which is connected to the N terminal of the mains, and the other end is another output end of HF. The high-power AC mains rectification filter circuit BF includes the mains high-voltage full-wave rectifier bridge B1 and the high-voltage filter ca...

Embodiment 2

[0041] see image 3 , DC high-voltage direct-drive LED circuit based on high-power passive harmonic filter: It is composed of high-power passive harmonic filter HF, high-power AC rectifier filter circuit BF and LED high-voltage high-power switch control circuit group in series.

[0042] The high-power passive harmonic filter HF is an inductor-capacitor passive harmonic filter. The high-power passive harmonic filter HF is composed of an LC harmonic filter network of more than one level, which is responsible for filtering out the harmonics generated by the high-power AC rectification filter circuit BF, ensuring that the DC high-voltage direct-drive LED circuit provided by the present invention has High power factor of 0.9, and able to overcome harmonic interference, of which the 3rd harmonic is less than 20%, the 5th harmonic is less than 8%, the 7th harmonic is less than 5%, the 9th harmonic is less than 4%, 11~39 The subharmonic is less than 2.5%.

[0043] The high-power AC ...

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Abstract

Aiming at the defect that a driving power range of an existing passive harmonic filter direct-current high-voltage direct-driven LED circuit is small, the invention provides a direct-current high-voltage direct-driven LED circuit based on a high-power passive harmonic filter. The direct-current high-voltage direct-driven LED circuit based on the high-power passive harmonic filter is formed by arranging the high-power passive harmonic filter HF, a high-power alternating-current rectification filter circuit BF and an LED high-voltage high-power on-off control circuit group in series in sequence. The high-power passive harmonic filter HF is composed of more than one level LC harmonic filter networks. The high-power alternating-current rectification filter circuit BF is used for conducting rectification and filter on an input alternating voltage and outputting a high direct voltage. The LED high-voltage high-power on-off control circuit group conducts on-off control on an LED load according to the voltage size of the high direct voltage VH output by the high-power alternating-current rectification filter circuit BF. The direct-current high-voltage direct-driven LED circuit based on the high-power passive harmonic filter has the advantages that the driving power can reach up to hundreds of watts, and the direct-current high-voltage direct-driven LED circuit based on the high-power passive harmonic filter is essential for the development and application of a high-power LED lighting technology.

Description

technical field [0001] The invention belongs to the field of electronics, and in particular relates to a high-power direct-current high-voltage direct-drive LED circuit based on a high-power passive harmonic filter. Background technique [0002] As a new generation of light-emitting devices, LED has the outstanding advantages of high efficiency and energy saving, and is constantly replacing traditional lighting technologies and is widely used. For a long time, LED drive circuit has been regarded as a key technology of LED lighting, which has a decisive impact on important parameters of LED lighting such as power factor PF, harmonic distortion THD, and light strobe. For this reason, the inventor has proposed a passive harmonic filter DC high-voltage direct-drive LED circuit to the State Intellectual Property Office, focusing on solving the technical problems of power factor PF, harmonic distortion THD, and optical flicker. This technical solution has high efficiency , high P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B37/02
Inventor 赵天鹏李雪白
Owner INST OF ADVANCED TECH UNIV OF SCI & TECH OF CHINA
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