A novel single-stage high-power-factor ac/dc converter featuring high circuit efficiency

Cheng, Hung‐Liang; Hsieh, Yao Ching; Lin, Chi Hsiang

doi:10.1109/icit.2009.4939686

Cited by 10 publications

(13 citation statements)

References 12 publications

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“…The diodes (D1, D2, D3, and D4) represent the intrinsic body diodes of the MOSFETs and these provides important role in mechanism of zero voltage switching. [3] Series resonant energy tank (LS, CS), and a transformer T1 form the load resonant circuit with high loaded factor. Four active switches, namely, S1, S2, S3, and S4 are controlled by four gated signals, namely, vgs1, vgs2, vgs3, and vgs4, respectively.…”

Section: Conventional Full Bridge Convertermentioning

confidence: 99%

Power Factor Corrected Single Stage AC-DC Full Bridge Resonant Converter

H¹,

Rajan²

2015

IJERT

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A resonant high power factor corrected AC to DC converter with symmetrical topology is compared with traditional full bridge series parallel converter. Conventional AC to DC converter consists of diode full bridge rectifier followed by a bulky DC link capacitor and a high frequency DC to DC converter. This type of converters introduces high distorted input current, resulting high harmonics and low power factor. Proposed converter adopts full bridge series resonant converter and two level buck boost PFC converter circuits. Switch utilization factor is drastically improved by reducing the number switches used in different stages. High power factor can be achieved by operating converter with DCM. Output voltage is regulated by adjusting the switch frequency. Zero voltage switching is achieved by series resonant tank which consists of resonant capacitor and a resonant inductor. A closed loop is introduced by PI controller. A proto type of 200W DC output was built and tested to verify the analytical predictions.

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Section: Conventional Full Bridge Convertermentioning

confidence: 99%

Power Factor Corrected Single Stage AC-DC Full Bridge Resonant Converter

H¹,

Rajan²

2015

IJERT

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“…2 Non-isolated single-stage AC/DC converters To achieve direct power transfer in single-stage AC/DC converters, there are two methods: (1) magnetic coupling [6,27,28] and (2) capacitive coupling [3,4]. The former method uses magnetic transformer to transfer a portion of input power to the output port directly.…”

Section: Introductionmentioning

confidence: 99%

Extension of minimum separable switching configuration modelling to single-stage AC/DC converters with direct power transfer

Ki¹,

Lu²

2012

IET Power Electron.

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This study extends the usage of minimum separable switching configuration (MISSCO) in generating circuit-oriented average model to more complex converter structures, which contain more than one switching cell, for example, single-stage AC/ DC converters, in systematic and efficient manner. The model is capable of both large and AC small signal analyses with high accuracy. Also, the model gives electrical information of input and output ports as well as the intermediate bus voltage. Unlike the state-space averaging technique, the model is fully compatible with general-purpose circuit simulators such as SPICE. This greatly facilitates the analysis and design of the converters. In this study, a generalised MISSCO model for non-isolated AC/ DC converters is presented and applied to a recently reported AC/DC converter as an example. Bode plots of transfer functions are also given for designing the feedback controller. Both its steady-state and frequency performances will be verified by simulation, experimental results and compared with state-space averaging counterpart.

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“…However, the problem of hybrid power supplies is becoming increasingly prominent in the aspects of reliability, security, performance, and energy consumption. Compared to the hybrid power supply, the high‐voltage DC (HVDC) power system has attracted worldwide attention with their advantages of higher reliability, lower cost, and higher efficiency . The rectifier modules play a vital role in the system efficiency.…”

Section: Introductionmentioning

confidence: 99%

QPR and duty ratio feed‐forward control for vienna rectifier of HVDC supply system

Dang

Tong

Huang

et al. 2017

IEEJ Transactions Elec Engng

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The grid current of a Vienna rectifier will change from the continuous conduction mode (CCM) to the discontinuous conduction mode (DCM) when the load current or the inductance decreases. This deteriorates the grid current. Therefore, a strategy based on the variable duty ratio feed-forward and quasi-proportional-resonant (QPR) combined control is put forward, by introducing the needed duty ratio to the original output of current inner loop, whereby the pressure of the inner loop is effectively reduced. The working mechanism of the Vienna rectifier is first analyzed. The transfer functions of CCM and DCM between duty ratio and grid current are then built. At the same time, the parallel multi-QPR harmonic compensators are adopted in the current inner loop to effectively eliminate the specific harmonic pollution. To verify the correctness and effectiveness of the proposed strategy, a 5.3-kW prototype under digital control is established. The simulation and experimental results show that both the steady and transient performance of the proposed strategy are better under the fixed current inner loop parameters, the current zero crossing distortion can be eliminated, and the current quality acquired under the transformation between CCM to DCM can be further improved.

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A novel single-stage high-power-factor ac/dc converter featuring high circuit efficiency

Cited by 10 publications

References 12 publications

Power Factor Corrected Single Stage AC-DC Full Bridge Resonant Converter

Power Factor Corrected Single Stage AC-DC Full Bridge Resonant Converter

Extension of minimum separable switching configuration modelling to single-stage AC/DC converters with direct power transfer

QPR and duty ratio feed‐forward control for vienna rectifier of HVDC supply system

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