• Proceedings of the KIEE Conference
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• 2006.07d
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• pp.2201-2202
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• 2006

In this paper, we designed high performance, high quality and high density switch mode power supply for precision electronics, and communication equipments. For this, we used two parallel DC-DC converters, which have opposite phases, to support proper high performance and high quality power. To reduce switching losses and make high switching frequency, active-clamp and ZVS technique were employed in each converter.

• Proceedings of the KIEE Conference
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• 2006.07a
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• pp.569-570
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• 2006

In this paper, we designed high performance, high quality and high density switch mode power supply for precision electronics, and communication equipments. For this, we used two parallel DC-DC converters, which have opposite phases, to support proper high performance and high quality power. To reduce switching losses and make high switching frequency, active-clamp and ZVS technique were employed in each converter.

• ETRI Journal
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• v.31 no.3
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• pp.298-303
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• 2009

A single-switch parallel resonant converter for induction heating is implemented. The circuit consists of an input LC-filter, a bridge rectifier, and a controlled power switch. The switch operates in soft commutation mode and serves as a high frequency generator. The output power is controlled via the switching frequency. A steady state analysis of the converter operation is presented. A closed-loop circuit model is also presented, and the experimental results are compared with the simulation results.

• Proceedings of the KIPE Conference
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• 1999.07a
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• pp.135-138
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• 1999

This paper analysis magnetic circuit of toroida SRM and simulate optimal switching angle. In this troidal SRM, two of three phase are energized at an arbitrary instance while it is with only one phase in case of typical SRM. It has many advantages in the size of machine and power efficiency. Not only typically Known topologies witched reluctance motors such as asymmetric converter but full bridge converter are safe to employ

• Proceedings of the KIEE Conference
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• 1992.07a
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• pp.169-171
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• 1992

In an automated power distribution systems, the fault situation is controlled from the control center through remotely-controlled sectionalizing switches. In this paper, the service restoration strategy which can yield the minimal switching actions and constraint checking is proposed and an expert system which generates the appropriate switching actions is described.

• 제어로봇시스템학회:학술대회논문집
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• 1986.10a
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• pp.601-606
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• 1986

In this paper, two methods of power circuit simulation is described in order to obtain the back data for design of current source inverter. One is steady-state analysis by differential equations during the various operating modes. Another method uses switching function, which represents the switching pattern of inverter, and direct-guadrature model of induction motor. The results of digital computer simulation by two methods are compared with the results of laboratory test.

• Proceedings of the Korean Institute of IIIuminating and Electrical Installation Engineers Conference
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• 1999.11a
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• pp.162-167
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• 1999

In Auxiliary block of High speed train Power factor correction and Harmonics reduction is very important issue for efficient energy transport. The GTO-equipped PWM converter is used for traction untill resently. but the rising power capability of IGBTs resently allows to build IGBT-equipped PWM converter with a considerably increases switching frequency. In this paper presents switching pattern, control method, operation mode and tuned filter to reduce dc link voltage ripple for paralleled converter.

• Journal of Power Electronics
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• v.7 no.1
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• pp.13-20
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• 2007

LLC resonant converters display many advantages over the conventional LC series resonant converter such as narrow frequency variation over wide range of load and input variation and zero voltage switching even under no load conditions. This paper presents analysis and design consideration for the half bridge LLC resonant converter. Using the fundamental approximation, the gain equation is obtained, where the leakage inductance in the transformer secondary side is also considered. Based on the gain equation, the practical design procedure is investigated to optimize the resonant network for a given input/output specifications. The design procedure is verified through an experimental prototype of the 115W half-bridge LLC resonant converter.

• Proceedings of the KIEE Conference
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• 1998.07f
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• pp.1869-1871
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• 1998

In this paper, we designed and fabricated a fast switching system for high power pulse. This system consists of a voltage conversion circuit, high voltage charging circuit, trigger circuit, and discharging circuit. Especially discharging line is designed by strip-line for low inductance and resistance. The experimental result is that current slew rate of the system is 6.67kA/86ns and this result is fully qualified for initiating EBW or EFI

• Proceedings of the KIEE Conference
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• 2006.07b
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• pp.1235-1236
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• 2006

In this paper, we designed high performance, high quality and high density switch mode power supply for precision electronics, and communication equipments. For this, we used two parallel DC-DC converters, which have opposite phases, to support proper high performance and high quality power. To reduce switching losses and make high switching frequency, active-clamp and ZVS technique were employed in each converter.