Abstract
Light-emitting diodes (LEDs) have recently become of utmost significance to replace conventional lighting sources. Power factor correction (PFC) control of LED lamps requires three sensors which cause more cost, increase time delay, and increase noise, thus reducing drive reliability. Alternative methods to estimate the inductor current instead of its measurement are mandatory. This paper proposes a sensorless predictive current controller to enhance power factor (PF) of LED lamp driver and reduce driver cost. The inductor current is estimated instead of employing current sensor relying on measured input and output voltages. Zero-crossing detector is utilized to accomplish robust performance during distorted supply voltage. The controller and power circuit are isolated. The control algorithm employs a two-loop control to achieve a high PF with sinusoidal input current. Rapid speed performance is accomplished. The influences of PFC on input current value, PF and harmonic orders are presented. A prototype LED lamp driver with the suggested PFC structure is tested practically by a digital signal processor (DSP) DS1104 platform to validate its effectiveness. Experimental tests under various working conditions are provided to prove the usefulness of the suggested PFC control.
Highlights
Twenty percent of worldwide consumed power is spent on lighting
This paper suggests a sensorless predictive current controller to improve the power factor (PF) of Light-emitting diodes (LEDs) lamp driver and reduce cost
The predictive current controller for LED lamp driver working in continuous conduction mode (CCM) as demonstrated in Figure 1 is presented
Summary
To decrease the price of the consumed lighting power, light-emitting diode (LED) lamps were deployed. In [10], PFC and regulator structures were combined together These guarantee ease circuit control, minimized size, a close to unity power factor (PF), and increased efficiency [11]. Numerous methods to enhance PF and current distortions for LED lamps were employed in [12,13,14] The majority of these approaches were depending on traditional analog control principles. To attain large switching frequency with the required specifications, a predictive digital PFC scheme was employed in [16] It achieves minimized cost, small computation burden, and improved behaviour compared with the traditional PFC approaches
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
