A low-frequency ripple suppression method for high power factor led drive power supply

A technology of LED drive and high power factor, which is applied in the field of LED drive power supply, can solve the problems of large output current and low-frequency ripple, limited application, stroboscopic, etc., and achieve the effect of high power factor and low-frequency ripple suppression

Active Publication Date: 2021-06-01
FUZHOU UNIV
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Problems solved by technology

The two-stage circuit topology usually adopts the circuit structure of Boost-PFC converter and DC / DC converter. The front-stage Boost-PFC converter realizes the power factor correction function, and the rear-stage DC / DC converter realizes the constant current control of the LED lamp. However, the LED drive power supply using a two-stage power conversion circuit, the output energy has undergone two-stage power conversion, low efficiency, high cost, and complex circuit structure, which limits its application in LED drive power supplies
Single-stage circuit topology is widely used in low-power applications due to its simple structure, low cost, high power factor, and high efficiency. However, due to the imbalance between instantaneous input power and constant output power, the output current There is a large low-frequency ripple, which causes stroboscopic problems when the LED is working

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  • A low-frequency ripple suppression method for high power factor led drive power supply
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  • A low-frequency ripple suppression method for high power factor led drive power supply

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[0024] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0025] 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.

[0026] 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 low-frequency ripple suppression method for a high power factor LED drive power supply, which provides an AC power supply, a rectifier circuit, a single-stage power factor correction circuit, an LED load, and a ripple suppression circuit; the input of the AC power supply and the rectifier circuit The positive and negative output terminals of the rectifier circuit are respectively connected to the positive and negative input terminals of the single-stage power factor correction circuit, and the output of the single-stage power factor correction circuit is connected in parallel with the output of the ripple suppression circuit to form an LED supply power to the load. The invention can suppress the low-frequency ripple of the LED lamp current and make the leakage inductance energy be effectively utilized.

Description

technical field [0001] The invention relates to the field of LED driving power supply, in particular to a method for suppressing low-frequency ripple of a high power factor LED driving power supply. 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. In the case of AC power supply, in order to meet the harmonic requirements of IEC61000-3-2, LED drive power supply needs to perform power factor correction. [0003] LED drive power supply with power factor correction function can be divided into single-stage circuit topology and two-stage circuit topology according to its topology. The two-stage circuit topology usually adopts the circuit structure of Boost-PFC converter and DC / DC converter. The front-stage Boost-PFC converter realizes the power facto...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B45/30H05B45/355H05B45/36H05B45/385H05B44/00
CPCH05B45/00
Inventor 林国庆苏锦文林梅珍
Owner FUZHOU UNIV
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