A novel feedforward loop implementation for the half-bridge complementary-control converter

Linera, F.F.; Sebastián, J.; Díaz, José Quintanal; Nuño, F.

doi:10.1109/apec.1998.647716

Cited by 9 publications

(4 citation statements)

References 7 publications

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“…The main drawback of this converter is that it has a double pole-zero on its transfer function and is quite difficult to control. To overcome this problem, a voltage feedforward technique should be used [7], and even in that case, if the input voltage range is wide, the solution is not totally effective. However, if the input voltage range is narrow, the HBCC is a very interesting converter.…”

Section: Proposed Topologymentioning

confidence: 99%

Single-stage ac-to-dc converter with self-driven synchronous rectification that complies with en61000-3-2 regulations

Fernández

Sebastián

Linera

et al. 2003

IEEE Trans. Ind. Electron.

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When low output voltage and EN61000-3-2 compliance are put together, not too many options can be used, especially if the power range is between 300-600 W. This paper presents one of the best solutions to comply with both specifications at the same time: the use of a single-stage topology to comply with the low-frequency harmonic limits combined with a half-bridge converter with complementary control, which is a very good option to obtain low output voltages with high efficiency.

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Section: Proposed Topologymentioning

confidence: 99%

Single-stage ac-to-dc converter with self-driven synchronous rectification that complies with en61000-3-2 regulations

Fernández

Sebastián

Linera

et al. 2003

IEEE Trans. Ind. Electron.

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“…Another problem is that it is a converter difficult to control [33]- [38]. The transfer function between the output voltage and the control variable is strongly conditioned by the resonance of the magnetizing inductance with the input capacitors [34]. This resonance adds complexity to the task of designing a stable controller [37], [38] and makes virtually impossible to achieve high bandwidths.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, [34] explains the advantages of including a feedforward loop in the standard AHBC. These small-signal models allow the designers to adjust the phase margin of the AHBC in close loop without instability risks (even though the controller still cannot be very fast).…”

Section: Introductionmentioning

confidence: 99%

Small-Signal and Large-Signal Analysis of the Two-Transformer Asymmetrical Half-Bridge Converter Operating in Continuous Conduction Mode

Arias

Díaz

Lamar

et al. 2014

IEEE Trans. Power Electron.

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Abstract.-The Asymmetrical Half-Bridge converter (AHBC) has many advantages over other PWM converters. The possibility of soft switching in primary switches and reduced switching losses in the secondary ones implies that the AHBC is a suitable topology for many high-performance applications. Besides, the lack of dead times, except those needed for achieving soft switching, is a very interesting feature to implement self-driven synchronous rectification. Moreover, the small size of its output filter is also a remarkable advantage in some fields (e.g., LED lighting). On the other hand, it also has some disadvantages. One of them is the short range of the duty cycle (lower than 0.5) and the other one is the difficult regulation due to a complex transfer function. The Two-Transformer AHBC (TTAHBC) solves the first problem as it enlarges the duty cycle range making its top limit higher than 0.5. Nevertheless, the regulation of this converter is still very complex and, besides, the transfer functions of the standard AHBC are not valid for the TTAHBC. As a consequence, the small-and large-signal models have yet to be studied. In this paper, the complete small-signal and largesignal analysis of the TTAHBC operating in Continuous Conduction Mode is provided. The large-signal and smallsignal models are developed taking into account the main parasitic components that affect the transient response of this converter. The validation of the resulting model is carried out by means of both, simulation and experimental results. The prototype is a 60-W TTAHBC designed for an input voltage of 400 V and an output voltage of 48 V.

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“…Half Bridge converter with Complementary Control has also an important dynamic problem due to a double pole-zero on its transfer function [9]. It should be noted that this problem can be solved by means of a voltage feedforward control technique [10]. However, if the input voltage range is large, the control of the converter becomes quite complicated.…”

Section: Conventional Driving Systemmentioning

confidence: 99%

New self-driven synchronous rectification system for converters with a symmetrically driven transformer

Fernández

Sebastián

Hernando

et al.

Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition, 2003. APEC '03.

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Synchronous Rectification (SR) is mandatory to achieve good efficiencies with low output voltages. If the transformer is driven asymmetrically without dead times, Self-Driven Synchronous Rectification (SDSR) is a very interesting solution. However, if the transformer is driven symmetrically, the synchronous rectifiers are off during the dead times and, as a consequence, the efficiency is lowered. This paper deals with a new SDSR system that keeps the rectifiers on even during the dead times. Thus, it can be used to obtain very low output voltages, such as 1.5 V, with quite good efficiency. Moreover, it can be used over a wide input voltage range. The new system is implemented in a prototype in order to measure the real efficiency that can be achieved with the proposed scheme.0-7803-7768-0/03/$17.00 (C) 2003 IEEE

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A novel feedforward loop implementation for the half-bridge complementary-control converter

Cited by 9 publications

References 7 publications

Single-stage ac-to-dc converter with self-driven synchronous rectification that complies with en61000-3-2 regulations

Single-stage ac-to-dc converter with self-driven synchronous rectification that complies with en61000-3-2 regulations

Small-Signal and Large-Signal Analysis of the Two-Transformer Asymmetrical Half-Bridge Converter Operating in Continuous Conduction Mode

New self-driven synchronous rectification system for converters with a symmetrically driven transformer

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