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| Illumination Bridgeless LED Drive Circuit and Analysis of Input Current Harmonic |
| Qiu Zhenjiang, Zhou Guide |
| Cangzhou Teacher’s College Cangzhou 061001 China |
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Abstract It is no doubt that the high-power hi-lite LED replaces incandescent lamp, fluorescent lamp. This paper indicates a high-power LED drive circuit which can directly make use of electric supply without a rectifier bridge. It gives an analysis of its working process, the relationship between input and output electric quantity and circuit structure parameter, and the harmonic distribution of importing exchange current. An efficient run is realized through using the circuit introduced in this paper, which completely applys to the character requirement of LED.In addition, the power factor of the drive circuit is very high while the degree of its electric current harmonic distortion is least.
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Received: 14 November 2008
Published: 04 March 2014
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2010, Vol. 25 
