An LFR Based on a Ćuk converter for application in HBLEDs

In this paper proposes the design and implementation of a stage voltage converter for use in feed a group of high brightness LEDs (HBLEDs). The use of this lighting technology has been developed en recent years. Currently, theses LEDs have high competitiveness in the market despite its high cost, due to its high energy efficiency. This objective must be performed by the voltage conversion stage thus, has been implemented an adaptation stage voltage and current of high performance, in order to introduce the least amount of harmonics on the network. For this use an active power factor correction, based on the Ćuk converter. Using a sliding mode control will be imposed that the converter behaves like a loss free resistor (LFR). Thus, the LFR act as an ideal rectifier power factor near unity. I. I TRODUCTIO Light emitting diodes (LEDs) are gradually becoming a common source of light [1], [2]. These devices, solid-state lighting is mainly characterized by their long life and high performance. An additional advantage is presented on the CFL, is that the LEDs do not contain contaminants such as mercury [3], and other notable features such as small size, robustness, ease of operation, insensitivity to vibrations and temperature changes, faster ignition, etc. .. Taking into account the high performance of these HBLEDs is raises the implementation of a stage adaptation that enhances the performance, and power factor (PF). Some shapes currently studied can see in [4], [5]. In this development stage adaptation is studies working as active power factor correction (PFC) in order to minimize distortion in the input current, and make it is in phase with the input voltage. The shape of PFC control is performed using a sliding mode control (SMC) in order to impose on the circuit behaviour as a LFR. [6]. An LFR (Fig. 1) is a two-port network belongs to the class circuits characterized by a balance between the power output and the power input (POPI), which at steady state, behaves as a resistive load. Thanks to this property and their ability to step down the input voltage, the Buck-Boost, SEPIC, modified SEPIC [7] and Ćuk power electronics converters are used as active PFC circuits [8], [9]. In this paper, a Ćuk converter for HBLEDs applications is proposed due to its performance as a AC-DC converter [10]. R P(t)=v1 /R + V1(t) LFR