• 전기전자학회논문지
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• 제11권4호
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• pp.315-321
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• 2007

The fast charging photoflash capacitor charger with wide range current limiter is presented. By using proposed control logic block and wide range current limiter, the photoflash capacitor charger can reduce charging time and control life of battery for user convenience. The proposed photoflash capacitor charger has 3s charging time at 3.3V battery voltage, 1.2A current limit condition. It is well-suited for portable device application like digital camera, digital video camera, and mobile phone with camera.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2009년도 춘계학술대회 논문집
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• pp.27-28
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• 2009

This paper suggests a autonomous linear Li-ion battery charger which can safely distribute power between an external power source(AC adapter, auto adapter, or USB source), battery, and the system load. Depending on an external power source's capability, the charger selects proper charging-mode automatically. The charger IC designed and fabricated on Dongbu HITEC's $0.35{\mu}m$ BCD process with layers of one poly and three metals.

• 전력전자학회논문지
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• 제5권6호
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• pp.537-543
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• 2000

표준 배터리 모듈 시스템을 위한 새로운 배터라 충.방전기를 제안한다. 전체 시스템의 크기를 줄이기 위해 충전기와 방전기의 회로가 하나의 컨버터로 구현되었으며, 최대 전력 추적을 포함한 태양전지 출략전압 제어와 태양 전지 출력과 부하 전력에 따른 배터리 충.방전 전류 제어를 동시에 수행한다. 또한, 제안된 컨버터는 부하의 전략 공급을 간단히 할 수 있는 일성 전압 버스(regulated bus)를 제공한다. 제안된 컨버터는 특성상 DCM으로 동작하므로 전듀의 첨두지가 크므로 고전력 시스템에서는 여러 개의 모듈로 사용되어야 한다.

• Journal of Power Electronics
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• 제13권4호
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• pp.584-591
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• 2013

In this paper, a hybrid booster power module with Si IGBT and Silicon Carbide (SiC) Schottky Barrier Diode (SBDs) is presented. The switching characteristics of the hybrid booster module are compared with commercial Silicon IGBT/Si PIN diode based modules. We applied the booster power module into a non-isolated on board vehicle charger with a simple buck-booster topology. The performances of the on-vehicle charger are analyzed and measured with different power modules. The test data is measured in the same system, at the same points of operation, using the conventional Si and hybrid Si/SiC power modules. The measured power conversion efficiency of the proposed on-vehicle charger is 96.4 % with the SiC SBD based hybrid booster module. The conversion efficiency gain of 1.4 % is realizable by replacing the Si-based booster module with the Si IGBT/SiC SBD hybrid boost module in the 6.6 kW on-vehicle chargers.

• KIEE International Transactions on Electrophysics and Applications
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• 제5C권5호
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• pp.196-203
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• 2005

A semi-empirical method to determine the electrostatic characteristics of a diode type corona aerosol charger based on ion current measurement and electrostatic charging theory was presented. Results from mathematical model were in agreement with those from experimental investigation of the charger. Current-voltage characteristics, $N_{i}t$ product and charge distribution against aerosol size were obtained. It was shown that the space charge was significant and must be taken into account at high ion number concentration and low flow rate. Additionally, significant particle loss was evident for particles smaller than 20 nm in diameter where their electrical mobility was high. Increase in charging efficiency may be achieved by introducing surrounding sheath flow and applying AC high voltage. Overall, the approach was found to be useful in characterizing the aerosol charger.

• Journal of Power Electronics
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• 제13권1호
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• pp.31-39
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• 2013

The conventional non-isolated boost converter has some drawbacks such as poor dynamic performance and a discontinuous output current, which make it unsuitable for battery charging applications. In spite of its compactness and lightness, it is not preferred as a charger of portable electronic devices. In this paper, a non-isolated boost converter topology for Li-ion batteries suitable for fuel cell powered laptop computers is proposed and analyzed. The proposed converter has an additional inductor at the output to make a continuous output current. This feature makes it suitable for charger applications by eliminating the disadvantages of the conventional non-isolated boost converter mentioned above. A prototype of the proposed converter is built for the Li-ion battery charger of a laptop computer to prove the validity and advantages of the proposed topology.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2018년도 전력전자학술대회
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• pp.186-188
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• 2018

In this paper, a single-phase multifunctional onboard battery charger with small DC-link capacitors is proposed, where the low-voltage battery charger is utilized as an active power filter to mitigate the inherent second-order ripple power when the high-voltage (HV) battery is charged from the grid. In this scheme, the large DC-link electrolytic capacitors of the HV battery charger can be eliminated without additional switches, leading to the reduction of cost and volume of the onboard battery charger. The validity of the proposed topology has been verified by the simulation results.

• 전력전자학회:학술대회논문집
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• 전력전자학회 2013년도 전력전자학술대회 논문집
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• pp.321-322
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• 2013

최근 모바일 디바이스의 다양화에 따라 여러 가지 출력사양과 호환 가능한 Charger가 요구되는 추세이다. 따라서 본 논문에서는 다양한 출력시스템을 구별하여 인지할 수 있는 Smart Charger에 필요한 부하시스템 인식 알고리즘을 제안한다. 제안한 부하시스템 인식 기술은 Linear Regulator를 이용하여 출력 전압을 가변시켜 부하시스템이 요구하는 출력사양을 찾는 방식으로 하나의 Charger로 다양한 출력사양을 가진 디바이스와 호환이 가능하다. 제안방식의 우수성과 신뢰성 검증을 위하여 2가지 출력 사항에 대한 인식 및 출력이 가능한 시작품을 제작하여 제안 알고리즘의 타당성을 검증한다.

• 대한전기학회논문지:전기기기및에너지변환시스템부문B
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• 제49권4호
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• pp.265-271
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• 2000

A non-contact battery charger for cellular phone is designed using half-bridge series resonant converter. This converter utilizes series resonance to reduce the undesirable effect of large leakage inductance of the detachable transformer and ZVS operation can reduce switching loss and switching noise. In this paper, analysis and design procedure of half-bridge series resonant converter with detachable transformer is presented. The input voltage is 85VAC∼270VAC, and the output voltage and current is 4.1V and 800mA, respectively. Furthermore, a method of calculating the secondary current of the transformer to control the battery charging current in the constant current charging mode is proposed. The performance of the charger is verified through experiments.

• 전력전자학회논문지
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• 제18권5호
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• pp.443-447
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• 2013

This paper deals with LLC resonant converter of on-board charger for electric vehicle charging. Generally, the on-board charger must have a very widely charging voltage, higher efficiency, higher power factor, lower volume and lower weight. For reducing the switching losses, voltage and current stress of the device, the on-board charger is apply the half-bridge LLC resonant converter topology. To have a wide voltage range, it is design the hardware parameters and determine the switching frequency range of the LLC resonant converter. The experimental results show a wide charge voltage.