A Study on the Secondary Rectification-Methods for the Three-Level Converter

Bae, Jin-Yong; Kim, Yong

doi:10.5370/jeet.2007.2.1.081

Cited by 4 publications

(3 citation statements)

References 6 publications

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“…Even with the EMI and a high frequency ringing at the switching legs, the current-balance transformer performs as a high-frequency rejection filter for sustaining the load in the proposed scheme. Finally, since the proposed ERC includes no additional diodes for supporting the MOSFET's unidirectional conduction and no extra inductor replaced with transformer leakage inductances [20], the circuit is competitive from the perspective of part count and manufacturing cost. On the other hand, a conventional ERC requires a pair of bidirectional voltage blocking switch cells including some high currentrating diodes, which increases the part count when compared with the proposed scheme.…”

Section: Energy Recovery Circuit With Current-balance Transformermentioning

confidence: 99%

High Efficiency Alternating Current Driver for Capacitive Loads Using a Current-Balance Transformer

Baek¹,

Cho²,

Park³

2011

Journal of Power Electronics

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This paper proposes a new alternating current driving method for highly capacitive loads such as plasma display panels or piezoelectric actuators, etc. In the proposed scheme, a current balance transformer, which has two windings with the same turnratio, provides not only a resonance inductance for energy recovery but also a current balance among all of the switching devices of the driver for current stress reduction. The smaller conduction loss than conventional circuits occurs due to the dual conduction paths which are parallel each other in the current balance transformer. Also, the leakage inductances of the transformer are utilized as resonant inductors for energy recovery by the series resonance to the capacitive load. Furthermore, the resonance contributes to the small switching losses of the switching devices by soft-switching operation. To confirm the validity of the proposed circuit, prototype hardware with a 12-inch mercury-free flat fluorescent lamp is implemented. The experimental results are compared with a conventional energy-recovery circuit from the perspective of luminance performances.

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Section: Energy Recovery Circuit With Current-balance Transformermentioning

confidence: 99%

High Efficiency Alternating Current Driver for Capacitive Loads Using a Current-Balance Transformer

Baek¹,

Cho²,

Park³

2011

Journal of Power Electronics

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“…Several researchers have attempted to overcome these problems of the conventional PSFB converter [19,[21][22][23][24][25][26][27]. In addition to the numerous studies on improvement of the primary side circuit, various secondary-side circuits for rectification have been considered in recent years; the secondary-side rectification circuits were introduced in [28][29][30][31]. Many researchers have adopted various techniques such as the conventional bridge rectifier, the center-tapped rectifier, and the current-doubler rectifier (CDR) as secondary rectification methods for the PSFB.…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of Improved High Step-Down DC-DC Converter for Electric Vehicles

Park

Kim

2021

Energies

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An improved high step-down DC-DC converter for charging the batteries in an electric vehicle application is proposed in this paper. It adopts the topology of the conventional full-bridge converter, which has a coupled inductor current-doubler rectifier as the secondary side of the transformer. In addition, four power switches are driven using a phase-shifting technique. The proposed converter can achieve a high step-down voltage with low-voltage stress on the rectifier diodes. In addition, the coupled inductor current-doubler rectifier of the secondary side can reduce the ripple current and losses of the secondary side to achieve high efficiency. Furthermore, the proposed converter can overcome the drawbacks of the conventional full-bridge converter, such as switching loss caused by high switching frequency, duty-cycle loss, voltage stress, and numerous components, and can increase the efficiency with the soft-switching technique. A 600 W laboratory prototype of the proposed converter was manufactured. The results of the experiments performed with the prototype proved the effectiveness and validated the use of the proposed converter for better charging of electric vehicles.

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“…그림 4를 릴럭턴스 등가 모델과 전기회로를 등가화 표현을 하여 이에 대한 회로 식을 이용하여 계산하게 되면 이를 이용하여 공극의 길 이와 각 코어의 설계 값에 의하여 k factor의 값이 결정 되게 된다. 그러므로 설계자가 코어 설계 시에 공극의 길이를 이용하여 k값을 결정할 수 있다 [12]. 결합된 인덕…”

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Mathematical Analysis of LLC Series Resonant Converter with Current Doubler Rectifier using Coupled Inductor

Shin¹,

Hwang²,

Yoon³

et al. 2014

The Transactions of the Korean Institute of Power Electronics

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This study proposes an LLC series resonant converter with a current doubler using a coupled inductor as a rectification circuit for the secondary side. The current doubler circuit is generally used for a high-voltage input and low-voltage output circuit to obtain high efficiency with small transformer turn ratio. However, an inductive circuit is not generally used in the secondary side of an LLC series resonant converter. If inductive components exist on the secondary side, the resonant characteristics are changed through the secondary inductive circuit. Mathematical analysis shows that the secondary-side current doubler with coupled inductor is not affected by the resonant characteristic of the primary LLC if leakage inductance occurs in the coupled inductor. Results of the analysis are proven by simulation; an experiment is also conducted for the proposed circuit.

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A Study on the Secondary Rectification-Methods for the Three-Level Converter

Cited by 4 publications

References 6 publications

High Efficiency Alternating Current Driver for Capacitive Loads Using a Current-Balance Transformer

High Efficiency Alternating Current Driver for Capacitive Loads Using a Current-Balance Transformer

Design and Implementation of Improved High Step-Down DC-DC Converter for Electric Vehicles

Mathematical Analysis of LLC Series Resonant Converter with Current Doubler Rectifier using Coupled Inductor

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