High-power factor low-aberration rate high-power light-emitting diode (LED) driving circuit
A technology of LED circuit and high power factor, applied in electric lamp circuit arrangement, electric light source, lighting device, etc., can solve the problems of low reliability, complicated circuit and low power factor of LED products, so as to save electric energy to drive high-power LED, Great application prospect, high power factor effect
Inactive Publication Date: 2015-04-29
FUJIAN AGRI & FORESTRY UNIV
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Problems solved by technology
[0002] The existing high-power LED drive circuits all use complex circuit and high-cost switching power supply as the drive circuit
Due to the high temperature of the LED working environment, the components of the switching power supply are easy to age and have high failure rates. The reliability of LED products in actual operation is low and the damage rate is high.
Using other circuits to drive high-power LEDs has problems such as low power factor and high harmonic distortion of input current.
Method used
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[0008] Such as figure 1 As shown, the present invention provides a high power factor and low distortion rate high-power LED drive circuit, including a capacitive step-down rectification constant-current LED drive circuit and an inductor step-down rectification constant-current LED drive circuit. It is characterized in that: one path of the mains input is stepped down and rectified by a capacitor to supply a high-power LED circuit, and the other path is stepped down and rectified by an inductor to supply a high-power LED circuit. The parameter design of the capacitor and the inductor ensures that the reactive components of the two currents, the harmonic distortion rates are almost equal, and the phases are opposite. Therefore, the purpose of driving high-power LEDs with high power factor and low distortion rate of mains power supply is achieved.
[0009] figure 2 It is a circuit diagram of a specific embodiment. In the mains input circuit, the phase of the generated current ...
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The invention relates to a high-power factor low-aberration rate high-power light-emitting diode (LED) driving circuit, which comprises a utility power input end, a capacitance step-down rectifier circuit, an inductance step-down rectifier circuit and a high-power LED circuit, and is characterized in that: and one circuit of the utility power input end passes through the capacitance step-down rectifier circuit and supplies power to the high-power LED circuit, and the other circuit of the utility power input end passes through the inductance step-down rectifier circuit and supplies power to the other high-power LED circuit. The high-power factor low-aberration rate high-power LED driving circuit is simple; the corresponding relationship between capacitance and inductance parameters is applied, so that the current of respective circuits for driving a high-power LED is offset at a power supply current node, further, the purposes of high power factor, low aberration rate and saving electricity for driving the high-power LED are achieved; and the circuit has greater application prospect in high-power LED streetlamps and large-screen LED display screens.
Description
technical field [0001] The invention relates to a high-power LED drive circuit with high power factor and low distortion rate, which is suitable for high-power LED street lamps and large-screen LED display screens. Background technique [0002] Existing high-power LED drive circuits all use switching power supplies with complex circuits and high costs as the drive circuit. Due to the high temperature of the LED working environment, the components of the switching power supply are easy to age and have high failure rates. The reliability of LED products in actual operation is low and the damage rate is high. Using other circuits to drive high-power LEDs has problems such as low power factor and high harmonic distortion of input current. Contents of the invention [0003] In view of the above-mentioned technical deficiencies, the present invention provides a high power factor low distortion rate high-power LED driving circuit. Voltage constitutes a constant current circui...
Claims
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IPC IPC(8): H05B37/02
CPCY02B20/72
Inventor 王琳基王研兆江仲灿林勇邹御
Owner FUJIAN AGRI & FORESTRY UNIV