Small-Signal Modeling of a Controlled Transformer Parallel Regulator as a Multiple Output Converter High Efficient Post-Regulator

Ferreres, A.; Carrasco, J.A.; Maset, E.; Ejea, J.B.

doi:10.1109/tpel.2003.820566

Cited by 27 publications

(12 citation statements)

References 9 publications

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“…6. From (1), the turn ratio of transformer T1 can be calculated as (11) where is the minimum input dc voltage, is equal to 0.5 , and here is a value larger than and close to zero, and is the first output voltage. The design of the turn ratio of transformer T1 and the maximum duty cycle is from the consideration of efficiency.…”

Section: Design Consideration Of the Proposed Multiple Output DCmentioning

confidence: 99%

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Design and Implementation of an Accurately Regulated Multiple Output ZVS DC–DC Converter

Zhang

2007

IEEE Trans. Power Electron.

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An accurately regulated multiple-output zero-voltage switching (ZVS) dc-dc converter is proposed. The converter is composed of three outputs altogether. The first and second outputs are regulated through the duty cycle control of two asymmetrical half bridge converters, while the third output is regulated through the phase shift of the two asymmetrical half bridge converters. The characteristic of this multiple-output dc-dc converter is analyzed and design process is investigated. ZVS is realized for all the main switches. Therefore this multiple-output dc-dc converter can operate with higher efficiency at higher switching frequency. The operation stages, ZVS condition and control detail are also presented. A 400 V input, 48 V/10 A, 5 V/20 A, 12 V/5 A outputs prototype is built to verify the design. The efficiency at rated input voltage full load is 93.36%.

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Section: Design Consideration Of the Proposed Multiple Output DCmentioning

confidence: 99%

“…Due to the variable-frequency control the magnetic component is not easy to be optimized. Another method used in multiple-output dc-dc converters is called parallel regulation [10], [11]. Essentially, it adds a controllable voltage source in the auxiliary output circuit.…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of an Accurately Regulated Multiple Output ZVS DC–DC Converter

Zhang

2007

IEEE Trans. Power Electron.

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“…By the single-output method, only one main output voltage is accurately regulated, whereas other auxiliary outputs are left almost uncontrolled due to the cross regulation effect [12][13][14][15][16]. One way to control these unattended output voltages is to adopt a postregulator, such as a linear regulator, a buck converter, or a magnetic amplifier [17][18][19][20]. The second feedback scheme is to apply a sum of two or more weighted output voltages which are sensed simultaneously [21,22].…”

Section: Introductionmentioning

confidence: 99%

Design of a two‐output forward converter with an output voltage objective function

Chen

Song

et al. 2011

Circuit Theory & Apps

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SUMMARYA new method is proposed in this paper to distribute the steady-state output voltage errors in a two-output forward converter. The cross regulation between the two output voltages are described in terms of the circuit parameters. An objective function is formed for each of the two outputs to track its reference within the specified error. The legitimate duty cycle range is located through the transfer characteristics between the duty cycle and the load currents. The weighting feedback gains of the two output voltages can be determined by the presented control scheme which optimizes the objective function. The proposed method is suitable for a two-output system without a dominant load. Experiments on a prototype are conducted to show that there exist a duty cycle range and a set of weighted feedback gains minimizing the defined objective function.

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“…The simplest way to provide the multiple voltage levels is to add the secondary windings of the transformer and use the post-regulators (PRs). The PRs could be the magamp [1,2], synchronous switch post-regulator (SSPR) [3], controlled transformer [4] or even the switching frequency [5]. The PR multiple-output converter could be deduced from any type of single-output converters that include a transformer.…”

Section: Introductionmentioning

confidence: 99%

Multiple-output DC-DC converters with the shared leg structure: Basic topologies, ZVS analysis and experimental results

Chen

Nie

Pan

et al. 2010

2010 IEEE Energy Conversion Congress and Exposition

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A family of multiple-output converters with the shared leg structure is analyzed, summarized and generalized in this paper. Since the full bridge (FB) and half bridge (HB) converters include the same bridge-leg structure, one of these legs can be shared by the appropriate design. With the shared leg, many benefits can be obtained: the structure is compact; all the outputs are still tightly regulated; moreover, the zerovoltage-switching (ZVS) range in the shared legs is extended naturally. The basic shared leg topologies, including the FB-AHB (asymmetrical half bridge), FB-RHB (resonant half bridge) and FB-FB topologies are discussed in this paper. Three types of ZVS characteristics in the shared leg are extracted from these basic shared leg topologies. The experiment results are also given to verify the validity of the analysis.Index Terms--dc-dc power conversion, shared leg, PWM, PFM, zero-voltage-switching (ZVS)

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Small-Signal Modeling of a Controlled Transformer Parallel Regulator as a Multiple Output Converter High Efficient Post-Regulator

Cited by 27 publications

References 9 publications

Design and Implementation of an Accurately Regulated Multiple Output ZVS DC–DC Converter

Design and Implementation of an Accurately Regulated Multiple Output ZVS DC–DC Converter

Design of a two‐output forward converter with an output voltage objective function

Multiple-output DC-DC converters with the shared leg structure: Basic topologies, ZVS analysis and experimental results

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