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Dimming Method of Electrodeless Fluorescent Lamp

A fluorescent lamp, electrodeless technology, used in electric light sources, light sources, electrical components, etc., can solve the problem of not wide dimming range of PFM, and achieve the effects of high reliability, high dimming precision, and wide dimming range

Inactive Publication Date: 2016-01-27
FUZHOU UNIV
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  • Description
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Problems solved by technology

[0004] The object of the present invention is to provide a dimming method for electrodeless fluorescent lamps, which not only overcomes the defect that the PFM dimming range is not wide, but also solves the problem of PDM stepwise dimming, and realizes smooth wide-range dimming of electrodeless fluorescent lamps. Light

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  • Dimming Method of Electrodeless Fluorescent Lamp
  • Dimming Method of Electrodeless Fluorescent Lamp
  • Dimming Method of Electrodeless Fluorescent Lamp

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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] This embodiment proposes a dimming method combining PFM and PDM, where PDM is segmented dimming, and PFM is continuous dimming. Divide the output power of the lamp into several power sections through PDM first, and perform rough power adjustment, and then use PFM to perform fine adjustment of power in each power section. In each PDM interval, the PFM dimming operating frequency should be as close as possible to the resonance frequency on the basis of satisfying the dimming power. In different PDM intervals, there are different operating frequencies that satisfy a certain dimming power at the same time, and the operating frequency closest to the resonance frequency is used. and the PDM interval where it is located are the final dimming operating frequency and operating interval. In the process of dimming, the frequency of PDM is not fixed. The fr...

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Abstract

The invention relates to a dimming method suitable for load characteristic of an electroless fluorescent lamp. Pulse frequency modulation (PFM) is combined with pulse density modulation (PDM); based on satisfying different dimming outputs, the PFM dimming frequency at each PDM section is close to resonant frequency so as to realize the smooth dimming and guarantee the stable and reliable work of the electroless lamp. The control method overcomes the disadvantages of narrow dimming range of the PFM and step dimming of the PDM and realizes the smooth and wide electroless fluorescent lamp dimming. The electroless fluorescent lamp dimming method has advantages of broad dimming range, high dimming precision, high reliability and so on.

Description

technical field [0001] The invention relates to the technical field of dimming of an electrodeless fluorescent lamp, in particular to a dimming method of an electrodeless fluorescent lamp. Background technique [0002] Electrodeless fluorescent lamps have become one of the ideal new light sources due to their high color rendering, high luminous efficiency, and long life, and are widely used in lighting places such as factories, roads, and squares. Electrodeless fluorescent lamps have no electrodes and rely on the basic principle of electromagnetic induction to form a plasma gas discharge to emit light. The dimming control of the electrodeless fluorescent light source can not only achieve the purpose of lighting energy saving, but also avoid harmful glare, which is an important indicator for realizing green lighting. [0003] At present, domestic and foreign studies on dimming control strategies for electrodeless fluorescent lamps mainly focus on two aspects: rectifier-side ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B41/39H05B41/288
Inventor 林国庆洪春辉沈豫
Owner FUZHOU UNIV
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