• 전력전자학회:학술대회논문집
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• 전력전자학회 2006년도 전력전자학술대회 논문집
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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.

• Journal of Power Electronics
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• 제17권3호
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• pp.590-600
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• 2017

This paper presents a ripple-free input current modified interleaved boost converter for high step-up applications. By integrating dual coupled inductors and voltage multiplier techniques, the proposed converter can reach a high step-up gain without an extremely high turn-ON period. In addition, a very small auxiliary inductor employed in series to the input dc source makes the input current ripple theoretically decreased to zero, which simplifies the design of the electromagnetic interference (EMI) filter. In addition, the voltage stresses on the semiconductor devices of the proposed converter are efficiently reduced, which makes high performance MOSFETs with low voltage rated and low resistance $r_{DS}$(ON) available to reduce the cost and conduction loss. The operating principles and steady-state analyses of the proposed converter are introduced in detail. Finally, a prototype circuit rated at 400W with a 42-50V input voltage and a 400V output voltage is built and tested to verify the effectiveness of theoretical analysis. Experimental results show that an efficiency of 95.3% can be achieved.

• 한국전자통신학회논문지
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• 제6권6호
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• pp.865-871
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• 2011

태양광 시스템이나 연료전지 시스템에 많이 사용되는 DC-DC 컨버터는 부스트 컨버터이다. 이 중 입출력 전류 리플이 작은 인터리브드 부스트 컨버터가 최근에 많이 사용되고 있다. 이 회로는 입출력 전류 리플이 작기 때문에 입출력 커패시터의 크기를 줄일 수 있다. 따라서 기존의 전해 커패시터에서 신뢰성이 우수한 필름 커패시터를 사용할 수 있고 이는 전체 시스템의 수명 및 신뢰성을 향상시킬 수 있다. 본 논문에서는 다단 인터리브드 부스트 컨버터의 입출력 전류리플의 수식을 유도하고 듀티에 따른 특성을 알아본다. 위에서 언급한 내용을 확인하기 위해서 PSIM 툴을 이용하여 계산된 값과 비교를 할 것이다.

• 조명전기설비학회논문지
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• 제23권12호
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• pp.127-135
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• 2009

본 연구에서는 2개의 인덕터를 이용한 인터리브 AC/DC 승압형 컨버터의 듀티 사이클이 0.5 이상일 때 배압 회로 특징을 나타내었다. 일반적으로 AC/DC 승압형 컨버터는 낮은 입력전압(입력 AC 110[V])이 높은 입력전압(입력 AC 220[V])에 비하여 낮은 효율을 갖는다. 제안된 인터리브 AC/DC 승압형 컨버터는 낮은 입력전압에서 배압 회로로 동작함으로 인하여 낮은 입력전압을 사용하는 기존의 컨버터와 비교하여 높은 역률과 향상된 효율을 갖는다. 본 연구에서는 배압 회로 동작하는 하는 인터리브 AC/DC 승압형 컨버터를 제안하고, 모드별 해석과 특성을 논의하였으며, 300[W]급 시작품을 제작하여 그 타당성을 검증하였다.

• 전력전자학회논문지
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• 제19권6호
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• pp.481-487
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• 2014

This study proposes a two-phase non-inverting buck-boost converter that uses a coupled inductor. The multi-phase converter has many advantages over single-phase counterparts, such as reduced output current ripple and conduction loss in switching devices and passive elements. Although the output current ripple of the multi-phase converter is reduced significantly because of the interleaved effect, the inductor current ripple is not reduced in multi-phase converters. One of the solutions to this problem is to use a coupled inductor. A 4 kW prototype converter is built and tested to verify the performance of the proposed converter.

• Journal of Power Electronics
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• 제5권2호
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• pp.104-108
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• 2005

This paper presents the performance improvement of voltage-mode controlled interleaved synchronous buck converters. This is a voltage-mode controlled scheme, where the controllers do not need an external saw-tooth generator for PWM generation and the loop design is easier. The controller implementation requires only a single error amplifier and gives almost current mode control performance. The control scheme uses voltage feedback with two loops similar to current mode control: one for the slow outer loop and the other for the faster inner PWM control loop. To improve the performance of the converter system a coupled inductor is used. This coupled inductor reduces the magnetic size and also improves the converter's transient performance without increasing the steady-state current ripple. The effectiveness of the proposed control scheme is demonstrated through PSIM simulations.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2016년도 전력전자학술대회 논문집
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• pp.401-402
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• 2016

This paper presents interleaved bi-directional LDC(Low DC-DC converter) with soft-switching for 48V system of Mild-HEV(Hybrid Electric Vehicles). The proposed LDC is composed of interleaved bi-directional converter and small resonant inductor and capacitors. Comparing the conventional converter, the proposed LDC improves the problem of switching loss by employing soft-switching. In this paper, mode analysis is described in detail for operating the soft-switching. The proposed LDC is verified by PSIM simulation.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2016년도 전력전자학술대회 논문집
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• pp.391-392
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• 2016

A phase shedding control algorithm to increase efficiency of 3-Phase interleaved boost converter is proposed. Conventional interleaved converter has low efficiency under the light load condition. In this paper, the number of phase is controlled in accordance with the load condition to increase the light load efficiency. The validity of proposed phase control algorithm is verified by simulation results based on measured efficiency.

• 전기학회논문지
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• 제59권1호
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• pp.88-95
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• 2010

In this paper, the variation of phase current and input current ripple of interleaved boost converter at DCM for fuel cell applications are theoretically analyzed. Also, based on the detailed analysis, numerical formula of input current ripple expressed in rising and falling slope magnitude, D, and $D_A$ is proposed. In order to verify proposed formulas, simulation and experimental results are compared with theoretical data and validity of proposed theory is established.

• Journal of Power Electronics
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• 제18권4호
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• pp.985-996
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• 2018

The implementation and performance evaluation of an interleaved boundary conduction mode (BCM) boost power factor correction (PFC) converter is presented in this paper by employing three wide band-gap switching devices: a super junction silicon (Si) MOSFET, a silicon carbide (SiC) MOSFET and a gallium nitride (GaN) high electron mobility transistor (HEMT). The practical considerations for adopting wide band-gap switching devices to BCM boost PFC converters are also addressed. These considerations include the gate drive circuit design and the PCB layout technique for the reliable and efficient operation of a GaN HEMT. In this paper it will be shown that the GaN HEMT exhibits the superior switching characteristics and pronounces its merits at high-frequency operations. The efficiency improvement with the GaN HEMT and its application potentials for high power density/low profile BCM boost PFC converters are demonstrated.