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High power factor non-electrolytic capacitance LED driving power supply and control method thereof

A technology of LED drive and high power factor, which is applied in the field of high power factor electrolytic capacitor LED drive power supply and its control, and can solve the problems of small withstand voltage and capacitance, increased volume, and increased cost.

Inactive Publication Date: 2019-04-26
FUZHOU UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] Compared with long-life LED lights, electrolytic capacitors have a shorter service life, and other types of capacitors generally have smaller withstand voltage and capacitance values, so it is impossible to simply replace electrolytic capacitors
In the existing non-electrolytic capacitor LED drive power scheme, although the harmonic current injection method can realize electrolytic capacitance, it reduces the power factor of the circuit; using an inductor instead of a capacitor as a storage element has high reliability, but the volume increase, increase cost

Method used

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  • High power factor non-electrolytic capacitance LED driving power supply and control method thereof
  • High power factor non-electrolytic capacitance LED driving power supply and control method thereof
  • High power factor non-electrolytic capacitance LED driving power supply and control method thereof

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0035] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0036] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combina...

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Abstract

The invention relates to a high power factor non-electrolytic capacitance LED driving power supply and a control method thereof. The high power factor non-electrolytic capacitance LED driving power supply comprises a rectifier circuit, a two-circuit interleaved parallel-connected Boost circuit, an auxiliary circuit and an LED load; the two-circuit interleaved parallel-connected Boost circuit worksin a current discontinuous mode to realize a power factor correction function and constant current control; the auxiliary circuit is used for balancing the difference between the alternating currentinput instantaneous power and the direct current output instantaneous power, then use of large capacity electrolytic capacitance is avoided, film capacitance can be used instead of the electrolytic capacitance, and the non-electrolytic capacitance LED driving power supply is realized; and through coordination control of the interleaved parallel-connected Boost circuit and the auxiliary circuit, low ripple output and constant current control of the LED load can be realized.

Description

technical field [0001] The invention relates to the field of LED driving, in particular to a high power factor non-electrolytic capacitor LED driving power supply and a control method thereof. Background technique [0002] With its many advantages such as energy saving, environmental protection, high efficiency and long life, LED has become a new generation of green lighting source. With the maturity of LED lighting technology, it will be widely used in various fields. The driving power supply is an indispensable part of LED lighting, and it is the key to ensuring the quality of LED lighting and overall performance. [0003] In the case of AC power supply, in order to meet the harmonic requirements of IEC61000-3-2, the LED drive power supply must have a power factor correction function. For LED drive power with high power factor, the AC input voltage and current are in phase, and the AC input instantaneous power contains twice the power frequency ripple, while the output p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/08H05B44/00
CPCH05B45/00
Inventor 林国庆黄秀玲
Owner FUZHOU UNIV
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