Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Hee Jun Kim"'
Publikováno v:
Journal of Electrical Engineering and Technology. 12:1156-1165
A high performance interleaved bridgeless boost power factor correction (PFC) rectifier operating under the critical current conduction mode (CrM) is proposed in this paper to improve the efficiency and system performance of various applications, suc
Publikováno v:
Journal of Electrical Engineering and Technology. 11:1229-1234
This paper proposes a novel bridgeless single-stage step-up voltage rectifier. Rectification, voltage step-up, and power factor correction functions can all be achieved in a single-stage circuit. The proposed circuit could be used as a power supply f
Publikováno v:
Journal of Electrical Engineering and Technology. 11:860-868
A bidirectional DC-DC converter (BDC) is an indispensable electrical unit for the electric vehicles (EVs). High efficiency, high power density, isolation, light weight and reliability are all essential requirements for BDC. In this paper, a 3 kW BDC
Publikováno v:
Journal of Electrical Engineering and Technology. 11:393-404
In this paper, a carrier-based pulse with modulation (PWM) strategy for three-phase three- level inverter is dealt with, which can keep the common mode voltage constant with minimized switching frequency. The voltage gain and the switching frequency
Publikováno v:
Journal of Electrical Engineering and Technology. 10:2334-2342
This paper proposes an LED driving circuit with a digital controller, power factor correct (PFC) function, and low light flicker. The key topology of the proposed circuit is a conventional Flyback combined with a pre-stage. As a result, there will be
Autor:
Guoen Cao, Hee-Jun Kim
Publikováno v:
Journal of Electrical Engineering and Technology. 9:1332-1342
This paper proposes a novel test circuit for SiC transistors. On-state resistance under practical application conditions is an important characteristic for the device reliability and conduction efficiency of SiC transistors. In order to measure the o
Publikováno v:
Journal of Electrical Engineering and Technology. 7:905-910
This paper reports an investigation of pulse width modulation (PWM) techniques for twophase brushless DC (BLDC) motors fed by a two-phase eight-switch inverter in a fan application. The three-phase BLDC motor is widely applied in industry; however, a
Autor:
Hee-Jun Kim, Baek-Haeng Lee
Publikováno v:
Journal of Electrical Engineering and Technology. 2:373-378
Soft switching was applied to the multi-level inverter to enhance the performance of the high-intensity discharge (HID) ballast used in vehicle headlights. The electrical properties were investigated and the available modeling of ballast in steady st
Publikováno v:
Journal of Electrical Engineering and Technology. 2:249-256
This paper presents a new circuit topology and its digital control scheme for a half-bridge resonant inverter. As the proposed half-bridge inverter can be operated in load-freewheeling modes, the pulse-width modulation (PWM) method can be used for th