Constant on time controlled zero voltage switching electronic ballast with power quality improvement

Abstract

This study deals with the design, modelling and implementation of unity power factor (UPF) boundary conduction mode (BCM)-based electronic ballast for a T8, 36 W fluorescent lamp. In low power applications, BCMbased boost converter is widely used because of the low inductor value, however, because of zero crossover distortion, achieving a total harmonic distortion of <10% is difficult for universal AC mains. In proposed electronic ballast, UPF has been achieved at universal AC mains by using a boost power factor corrected converter operating in BCM with constant on time control. The achieved constant DC-link voltage is converted into high frequency AC voltage using a quasi-half bridge series resonant inverter to initiate the discharge and also to drive the fluorescent lamp with constant current. The modelling and simulation of the proposed topology have been performed using sim power system toolboxes in MATLAB-Simulink environment. The switching losses have been reduced by achieving zero voltage switching at an operating switching frequency of 46 kHz. Different evaluated parameters have been found as per the international standard IEC61000-3-2 of class C regulations.

A field programmable gate array controlled high‐current pulsed source for airborne transient electromagnetic system

“…Converters with interleaved operation can provide higher output power and lower input current ripple [17][18][19][20]. Recently, the boundary-conduction-mode (BCM) boost converter with interleaving more channels has been a popular topology due to its higher output power levels [21,22]. In general, few reports are available for capacitive energy storage based on interleaved operation.…”

Wattage-independent dynamic conductance model of compact fluorescent lamps: Validation and application in high-frequency operation

“…Although LEDs are replacing fluorescent lamps in commercial as well as domestic lighting applications, the ongoing research activities relating to e-ballast technology indicate the relevance of this present study. Recent publications address some of the related aspects of the e-ballast, namely (1) improvement of efficiency of the e-ballast by reducing the number of stages, active switches and components and by minimizing the switching loss; 6,7 (2) reduction of power quality problems by increasing input power factor and decreasing the input current distortion; 8,9 and (3) development of new control topologies for satisfactory performance of the lamp system under rated and dimming conditions. 10…”

Brushless DC motor drive with power factor regulation using Landsman converter

“…For achieving PF close to unity at AC supply, PFR (PF regulation) converters are embedded, following to a DBR [17][18][19][20][21]. The mode of operation of PFR converter is a significant factor as it directly affects the rating of passive elements of converter and cost of overall system.…”

“…Many configurations of PFC converter driven BLDC motor drives have been anticipated for various applications [19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36]. PFC converter based on boost configuration has emerged as popular configuration for driving a BLDCM [23].…”

“…PF correction (PFC) converters working in continuous inductor current mode (CICM) require one current and two voltage sensors for their operation, which is not a cost efficient solution for medium/low power appliances. While, a PFC converter working in the discontinuous inductor current mode (DICM) uses a voltage follower control, which requires single sensor of DC bus voltage for voltage control, so that inherent PFR is achieved at AC mains [20, 21].…”