Control of a series resonant converter by pulse density modulation

Dalapati, Sasanka; Ray, Sudipta; Chaudhuri, S.; Chakraborty, Chandan

doi:10.1109/indico.2004.1497831

Cited by 14 publications

(5 citation statements)

References 8 publications

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“…Since the SRC has normalized voltage gain of one at output peak/valley, the transformer turns ratio n should satisfy (21). After n is chosen and L m is determined by (4), the design of core size (i.e., A e ) and actual numbers of turns can be initiated.…”

Section: B Transformer Designmentioning

confidence: 99%

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A Hybrid Modulation Method for Single-Stage Soft-Switching Inverter Based on Series Resonant Converter

Yeh

Chen

Lee

et al. 2020

IEEE Trans. Power Electron.

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Pseudo-dc-link inverters are promising due to the single-stage configuration. The inverters can be isolated by high-frequency transformers, which also provide the freedom of step-up/down through winding turns ratio. Conventionally, a pseudo-dc-link inverter is based upon a pulsewidth modulation converter like flyback converter, but the accompanying switching losses can degrade efficiency and overall system performance. Alternatively, resonant converters (e.g., series resonant converter) seem to fit the need as they typically display soft-switching characteristics. However, the relevant research results are scarce because of two main reasons: high resonant current and limited soft-switching range. To overcome the difficulties, a hybrid modulation method is proposed in this article for a pseudo-dc-link inverter based on series resonant converter. In high-line region, the inverter operates with variable-frequency modulation, which leads to zero-voltage switching and relatively low-resonant current. In low-line region, the inverter operates with a short-pulse density modulation so that switching losses are greatly curtailed without excessive resonant current. The merits in both regions together contribute toward the high efficiency of the inverter. This article presents the operational principle of the proposed modulation as well as a comparison with other modulation methods. In addition, a 400 V-230 V ac , 2-kW prototype was built to verify the proposed modulation and the peak efficiency reaches 98.0%.

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Section: B Transformer Designmentioning

confidence: 99%

“…Originated from three basic control methods (shown in Fig. 3) for SRC [19]- [21], the previous modulations for SRC-PDI can be categorized into three corresponding basic schemes-phaseshift modulation (PSM), variable-frequency modulation (VFM), and pulse density modulation (PDM). The details are introduced along with the past works as follows.…”

mentioning

confidence: 99%

A Hybrid Modulation Method for Single-Stage Soft-Switching Inverter Based on Series Resonant Converter

Yeh

Chen

Lee

et al. 2020

IEEE Trans. Power Electron.

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“…FB series resonant converter (SRC) is another type of FB converter which applies minimum components and can be controlled to attain ZVS operation [21]. However, ZVS is less effective for IGBT switches and also frequency should be changed in order to regulate the output voltage.…”

Section: Introductionmentioning

confidence: 99%

Resonance based zero‐voltage zero‐current switching full bridge converter

Karimi

Adib

Farzanehfard

2014

IET Power Electronics

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A zero-voltage and zero-current switching full bridge converter with series resonance tank is presented in this study. This converter is based on standard full bridge topology and a series capacitor is added in the primary side to reset the leakage inductance current without any additional auxiliary circuit. Leakage inductance of the transformer is used as the resonance inductance. Using series resonance tank and applying control pulses with fix frequency, zero-voltage switching for leading leg and zero-current switching for lagging leg is achieved. The output power is controlled using phase shift technique. In the proposed converter, soft-switching condition is attained for wide range of load variation. Due to its high performance and minimum additional components with respect to regular converter, this converter can be applied for medium to high-power applications. Topology and operating modes are discussed and the validity of theoretical analysis is verified by prototype experimental results.

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“…Various control techniques have been applied to SRCs in the literature. These include average current control [1], frequency control [2], capacitor voltage control [3], diode conduction angle control [4], optimal trajectory control monitoring the energy level of the resonant tank [5,6] and pulse density modulation [7][8][9]. These methods were mainly applied to half-bridge SRC topologies.…”

Section: Introductionmentioning

confidence: 99%

Steady-state analysis of full-bridge series resonant converter with phase-shift and frequency control

Aboushady¹,

Ahmed²,

Finney³

et al. 2010

5th IET International Conference on Power Electronics, Machines and Drives (PEMD 2010)

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This paper presents steady-state ac analysis of the series resonant converter with phase-shift and frequency control. Analysis for the converter operation above resonance is performed. A simple analytical expression for the converter input/output voltage gain as a function of phase-shift and frequency is derived. Different converter operation modes are demonstrated with simulation results. Analytical expressions for mode boundaries and maximum power transfer to load are derived, discussed, and graphically represented.

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Control of a series resonant converter by pulse density modulation

Cited by 14 publications

References 8 publications

A Hybrid Modulation Method for Single-Stage Soft-Switching Inverter Based on Series Resonant Converter

A Hybrid Modulation Method for Single-Stage Soft-Switching Inverter Based on Series Resonant Converter

Resonance based zero‐voltage zero‐current switching full bridge converter

Steady-state analysis of full-bridge series resonant converter with phase-shift and frequency control

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