• Title/Summary/Keyword: Discontinuous current mode

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Modeling and Steady-state Analysis of the Multi-Phase Interleaved Buck converter in Discontinuous Inductor Current Mode (불연속 전류모드에서의 다상 교호 강압컨버터의 정상상태 해석 및 모델링)

  • Chang, Sung-Dong;Jang, Eun-Sung;Chung, Se-Kyo;Shin, Hwi-Boem;Lee, Hyun-Woo
    • Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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    • 2004.05a
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    • pp.506-510
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    • 2004
  • A multi-phase interleaved buck converter is used to reduce current ripples and filter size of a power supply. This paper addresses the modelling and steady-state analysis of the multi-phase interleaved buck converter operated in discontinuous inductor current mode. The model is derived using an averaging technique in steady state. The do voltage ratio and the range of the discontinuous inductor current mode(DICM) and the continuous output current mode(COCM) are derived from the averaged state-space model. In addition, the efficiency is investigated according to the number of phase.

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Discontinuous Conduction Mode Current Control using a Current Gain Feedforward Compensation for Boost Converter (전류게인 전향보상기법을 이용한 부스트 컨버터의 불연속전도 모드 전류제어)

  • Lee, Seung-Goo;Kim, Young-Roc;Cha, Han-Ju
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.60 no.11
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    • pp.2049-2055
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    • 2011
  • In this paper a new current control method is proposed for the discontinuous conduction mode of boost converter. The proposed method using a current gain feedforward compensation adjusts a measured inductor current value and then, calculated an average current precisely in the discontinuous conduction mode as well as continuous conduction mode. By applying the proposed method, the current measurement error is significantly reduced to 2% regardless of the operating points. The proposed method is analyzed and its performance is investigated in simulation. To verify the feasibility of the proposed scheme, a 10kW 3-phase interleaved boost converter was built and experimental results are matched to the simulation results.

A Study on High Efficiency Boost DC-DC Converter of Discontinuous Current Mode Control (전류불연속 제어의 고효율 부스트 DC-DC 컨버터에 관한 연구)

  • Kwak Dong-Kurl;Kim Choon-Sam
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.54 no.9
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    • pp.431-436
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    • 2005
  • This paper studies a novel boost DC-DC converter operated high efficiency for discontinuous current mode (DCM) control. The converter worked in DCM eliminates the complicated circuit control requirement, reduces a number of components, and reduces the used reactive components size. In the general DCM converter, the switching devices are turned-on the zero current switching (ZCS), and the switching devices must be switched-off at a maximum reactor current. To achieve the zero voltage switching (ZVS) at the switching turn-off, the proposed converter is constructed by using a new loss-less snubber circuit. Soft-switched operation of the proposed boost converter is verified by digital simulation and experimental results. A new boost converter achieves the soft-switching for all switching devices without increasing their voltage and current stresses. The result is that the switching loss is very low and the efficiency of boost DC-DC converter is high.

Input Current Ripple Improvement on Interleaved Boost Power Factor Corrector Operating in Discontinuous Current Mode (불연속 전류모드로 동작하는 Interleaved 승압형 역률보상 컨버터의 입력전류 리플개선)

  • 허태원;박지호;노태균;김동완;박한석;우정인
    • Journal of the Korean Institute of Illuminating and Electrical Installation Engineers
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    • v.17 no.1
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    • pp.116-123
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    • 2003
  • In this paper, interleaved boost converter is applied as a pre-regulator in switched mode power supply. The pre-regulator plays a role to improve power factor. Interleaved Boost Power Factor Corrector(IBPFC) can reduce input current ripple as a single voltage control loop only without inner current loop, because input current is divided each 50% by two switching devices. Each converter cell is also operated in discontinuous current mode and inductor current of each converter is discontinuous. Total input current which is composed by each converter cell is continuous current. Thus, IBPFC is able to improve input current ripple. IBPFC operating in discontinuous current mode can be classified as six modes from switching state and be carried out state space averaging small signal modeling. A control transfer function is obtained according to the modeling. Single voltage control loop is also constructed by the control transfer function. From experimental result, improvement of power factor and input current ripple are verified.

Characteristic Analysis of Multi-Phase Interleaved Boost Converter in Discontinuous Inductor Current Mode (불연속 전류모드에서의 다상 교호 승압컨버터의 특성 해석)

  • Jang, Eun-Sung;Chung, Se-Kyo;Shin, Hwi-Beom
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.56 no.5
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    • pp.898-904
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    • 2007
  • This paper presents the generalized and explicit expressions for evaluating the performance of the multi-phase interleaved boost converter (IBC) operating in discontinuous inductor current mode (DICM). The full order averaged model is derived. The generalized transfer functions of interest are presented and the dynamic characteristics are analyzed. The generalized analysis of converter performance is verified through the experimental and simulation results.

Utility Interactive Photovoltaic Generation System Using Discontinuous Mode Buck-Boost Chopper (불연속모드 승강압초퍼를 이용한 계통연계형 태양광발전 시스템)

  • 김영철;이현우;서기영
    • The Transactions of the Korean Institute of Power Electronics
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    • v.4 no.4
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    • pp.325-331
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    • 1999
  • In a utility interactive photovoltaic generation system. a PWM inverter is used for the connection between the p photovoltaic arrays and the utility. The dc current becomes pulsated when the conventional inverter system operates i in the continuous current mode and de current pulsation causes the distortion of the accurrent waveform. This paper p presents the reduced pulsation of de input current by operating the inverter with buck-boost chopper in the d discontinuous conduction mode. The dc current which contains harmonic component is analyzed by means of s separating into two terms of a ripple component and a direct component. The constant dc current without p pulsation is supplied from photovoltaic array to the inverter. The proposed inverter system provides a sinusoidal ac c current for domestic loads and the utility line with unity power factor.

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Analysis and Design of Interleaved Boost Power Factor Corrector on Two Stage AC/DC PFC Converter (2단 역률보상회로를 구성하는 Interleaved 승압형 컨버터의 해석 및 설계)

  • 허태원;손영대;김동완;김춘삼;박한석;우정인
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.52 no.7
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    • pp.343-351
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    • 2003
  • In this paper, interleaved boost converter is applied as a first-stage converter in switch mode power supply. The first-stage converter plays a role to improve power factor. Interleaved Boost Power Factor Corrector(IBPFC) can reduce input current ripple as a single voltage control loop only without inner current loop, because input current is divided each 50% by two switching devices. Each converter cell is also operated in discontinuous current mode and inductor current of each converter is discontinuous. Total input current which is composed by each converter cell is continuous current. Thus, IBPFC is able to improve input current ripple. IBPFC operating in discontinuous current mode can be classified as six modes from switching state and be carried out state space averaging small signal modeling. A control transfer function is obtained according to the modeling. Not only steady-state characteristics but also dynamic characteristics is considered. Single voltage control loop is also constructed by the control transfer function. From experimental result, improvement of power factor and input current ripple are verified.

Reduction of Common Mode Voltage in Asymmetrical Dual Inverter Configuration Using Discontinuous Modulating Signal Based PWM Technique

  • Reddy, M. Harsha Vardhan;Reddy, T. Bramhananda;Reddy, B. Ravindranath;Suryakalavathi, M.
    • Journal of Power Electronics
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    • v.15 no.6
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    • pp.1524-1532
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    • 2015
  • Conventional space vector pulse width modulation based asymmetrical dual inverter configuration produces high common mode voltage (CMV) variations. This CMV causes the flow of common mode current, which adversely affects the motor bearings and electromagnetic interference of nearby electronic systems. In this study, a simple and generalized carrier based pulse width modulation (PWM) technique is proposed for dual inverter configuration. This simple approach generates various continuous and discontinuous modulating signals based PWM algorithms. With the application of the discontinuous modulating signal based PWM algorithm to the asymmetrical dual inverter configuration, the CMV can be reduced with a slightly improved quality of output voltage. The performance of the continuous and discontinuous modulating signals based PWM algorithms is explored through both theoretical and experimental studies. Results show that the discontinuous modulating signal based PWM algorithm efficiently reduces the CMV and switching losses.

Generalized Analysis of Multi-Phase Interleaved Boost Converter in Discontinuous Inductor Current Mode (불연속 전류모드에서의 다상 교호 승압컨버터의 특성 해석)

  • Shin Hwi-Beom;Jang Eun-Sung;Chung Se-Kyo;Lee Hyun-Woo
    • Proceedings of the KIPE Conference
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    • 2006.06a
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    • pp.134-136
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    • 2006
  • This paper presents the generalized and explicit expressions for evaluating the performance of the multi-phase interleaved boost converter in discontinuous inductor current mode. Furthermore, the generalized transfer functions of interest are presented and the dynamic characteristics are analyzed The generalized analysis of converter performance is verified through the experimental and simulation results.

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Analysis of Multi-Phase Interleaved Boost Converter in Discontinuous Inductor Current Mode (다상 부스트 교호컨버터의 불연속전류모드 특성 해석)

  • Shin, Hwi-Beom;Jung, Eun-Sung;Lee, Hyun-Woo
    • Proceedings of the KIPE Conference
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    • 2005.07a
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    • pp.778-780
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    • 2005
  • This paper presents the steady-state characteristics of the multi-phase interleaved converters in discontinuous inductor current mode(DICM). The full-order averaged model is derived, and the conversion ratio and efficiency are presented.

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