A current sensorless power factor correction control for LED lamp driver

Alexandria Engineering Journal

Sabry A. Mahmoud¹  Haitham Z. Azazi¹  Mahmoud S. Abd El-Moniem² 

[1] Department of Electrical Engineering, Faculty of Engineering, Menoufia University, Egypt;Petroleum Marine Services Company, Alexandria, Egypt;

关键词: LED lamp;    Power factor correction (PFC);    Total harmonic distortion (THD);    Current sensorless;    ADC;    Zero-crossing detector;   

DOI  :  10.1016/j.aej.2014.01.001

来源: DOAJ

【 摘 要 】

This paper proposes a new control technique to achieve a unity power factor at the input AC supply for light-emitting diode (LED) lamps controlled by AC–DC converter, without using a current sensor. Only two analog to digital converters (ADCs) for measuring the input and output voltages are used. This technique achieves isolation between power circuit and controller; it can be implemented by using a zero-crossing processing, which has a greater accuracy than other techniques. Simulation and experimental results illustrate the effectiveness and feasibility of the proposed control technique, which achieves low harmonic contents in the supply current, a near unity power factor (PF), a sinusoidal current waveform, and a fast dynamic response under transient operation.

【 授权许可】

Unknown