Modified Synchronous-Buck Converter for a Dimmable HID Electronic Ballast

Stankovic, Ana Vladan; Nerone, L.R.; Kulkarni, Prasannati

doi:10.1109/tie.2011.2141094

Cited by 20 publications

(10 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For maintaining ZVS throughout the entire operating range, under varying load conditions, the switching period T sw has to be continuously adapted according to (24). The procedure of the ZVS control design can be summarized by the following points: 1) determination of the maximum voltage V A,max and the desirable switching frequency f sw,des at the nominal power P nom ; 2) determination of the maximum allowed switching frequency f sw,max under light load conditions, which forms the criteria for the maximum allowed duration of the main transition period T res,max ; 3) selection of the most suitable power transistors; 4) calculation of the total gate charge Q tot and equivalent capacitance C eq at V A,max for the selected transistors, according to (6) and (7), respectively; 5) determination of the worst case voltage conversion ratio V B /V A (i.e.…”

Section: Zvs Control Designmentioning

confidence: 99%

“…Operation with a switching frequency higher than the one calculated from (24) must be avoided, as this would decrease I R , increase T res , and in extreme cases lead to a loss of ZVS. Less critical but also undesirable is the operation with a switching frequency lower than the one specified by (24). The resulting negative effect is the increased current ripple which increases the core losses in magnetic components, the turn-off losses of both transistors in the circuit, as well as the total conduction losses due to a higher rms current.…”

Section: Zvs Control Designmentioning

confidence: 99%

“…A way of overcoming this drawback is to continuously operate the converter in DCM and thus achieve ZVS within the entire operating range of the converter. Such an approach was successfully implemented within a unidirectional synchronous buck converter in [24], as well as within bidirectional dc-dc converters described in [25]- [27]. Although all the reported converters utilizing DCM-based ZVS have demonstrated highly efficient operation, it is still rather unclear how to obtain proper control parameters that will ensure reliable ZVS operation over the entire operating range of the converter.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

DCM-Based Zero-Voltage Switching Control of a Bidirectional DC–DC Converter With Variable Switching Frequency

Konjedic

Korošec

Truntič

et al. 2016

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

This paper investigates a control approach for achieving reliable zero-voltage switching transitions within the entire operating range of a conventional nonisolated bidirectional dc-dc converter that utilizes synchronous rectification. The approach is based on operation in the discontinuous conduction mode with a constant reversed current of sufficient amplitude, which is achieved by load-dependent variation of the switching frequency. This paper focuses on the obtained resonant voltage transitions and provides analytical models for determining the reversed current and timing parameters that would ensure safe, reliable and highly efficient operation of the converter. In addition, the proposed approach solves the synchronous transistor's spurious turn-on and body diode reverse recovery induced issues, does not require any additional components or circuitry for its realization, and can be entirely implemented within a digital signal controller. The effectiveness and performance of the presented control approach was confirmed in a 1-kW experimental bidirectional dc-dc converter that achieved 97% efficiency over a wide range of output powers at switching frequencies above 100 kHz.

show abstract

Section: Zvs Control Designmentioning

confidence: 99%

Section: Zvs Control Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

DCM-Based Zero-Voltage Switching Control of a Bidirectional DC–DC Converter With Variable Switching Frequency

Konjedic

Korošec

Truntič

et al. 2016

IEEE Trans. Power Electron.

View full text Add to dashboard Cite

show abstract

“…Comparable solutions have been proposed before for ozone generators [21], [22] and for the dimming of high-intensity discharge lamps [23], [24].…”

Section: Converter Designmentioning

confidence: 99%

Square-Shape Current-Mode Supply for Parametric Control of the DBD Excilamp Power

Florez

Díez

Piquet

et al. 2015

IEEE Trans. Ind. Electron.

View full text Add to dashboard Cite

With the aim of providing a power supply for the study of dielectric barrier discharge (DBD) excimer lamps (excilamps), a current-mode converter that allows for an accurate adjustment of the electrical power injected into one of those lamps is designed and implemented. Starting from the electrical model of the DBD lamps, the convenience of using a current-mode supply to control the lamp power is demonstrated. With the proposed converter, the current supplied to the lamp has a trapezoidal almost-square shape controlled by means of three parameters, namely, amplitude, duty cycle, and frequency, which provides full control of the lamp electrical power. Implementation is made considering a step-up transformer interfacing the high-voltage lamp with the converter. Experiments demonstrate the operating principle of this converter, including ultraviolet power measurements for a DBD XeCl excilamp. The capabilities of the converter are used to analyze the lamp behavior under different combinations of these three parameters, illustrating its capabilities for finding the optimal operating point of a DBD reactor.Index Terms-Current control, dielectric, dielectric barrier discharge (DBD), excimer lamp (excilamp), ultraviolet (UV).

show abstract

“…For safety, insulation, compatibility, and noise reasons, most applications require electrical isolation of the converter output from the energy source, where the transformer coupled flyback converter is a viable solution up to a few hundred watts. But higher power electrical isolation may be required by electric vehicles [1], battery chargers [2], fuel cell [3], [4], solar [5], [6], and wind energy, involving super-capacitors, smart grids and distributed generation [7], [8], electronic ballast [9], energy harvesting [10], and power factor correction [11], to name just a few application areas.…”

Section: Introductionmentioning

confidence: 99%

Transformer Isolated Buck-Boost Converters

Williams

2016

RESD

View full text Add to dashboard Cite

-Of the single-switch dc-to-dc converters, those with the buck-boost voltage transfer function offer the best potential for transformer coupling, hence isolation, at the kilowatt level. This paper highlights the limitations of the traditional magnetic coupled, buck-boost topology. Then four split-capacitor transformer-coupled topologies (specifically the Cuk, sepic, zeta, and new converters) with a common ac equivalent circuit, that do not temporarily store core magnetic energy as does the traditional isolated buckboost converter nor have a core dc magnetizing current bias as with the sepic and zeta transformer coupled topologies, are explored. Core dc bias capacitive voltage compensation is a practical design constraint in three of the four topologies, while all four must cater for stray and leakage inductance effects. Simulations and experimental results for the new converter at 408W that support the transformercoupled, single-switch dc-to-dc converter concepts are investigated.

show abstract

Modified Synchronous-Buck Converter for a Dimmable HID Electronic Ballast

Cited by 20 publications

References 24 publications

DCM-Based Zero-Voltage Switching Control of a Bidirectional DC–DC Converter With Variable Switching Frequency

DCM-Based Zero-Voltage Switching Control of a Bidirectional DC–DC Converter With Variable Switching Frequency

Square-Shape Current-Mode Supply for Parametric Control of the DBD Excilamp Power

Transformer Isolated Buck-Boost Converters

Contact Info

Product

Resources

About