• 전력전자학회:학술대회논문집
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• 전력전자학회 2003년도 춘계전력전자학술대회 논문집(2)
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• pp.598-601
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• 2003

본 논문에서는 전압원 인버터의 출력전압 파형을 개선하여 중 $\cdot$ 대용량급 모터드라이버 및 UPS, STATCOM, SVC등에 적용하기 위한 새로운 3상 전압원 인버터를 제안한다. 보조회로로서 사용한 컨버터로 리플전압을 발생시키고 이를 기존의 12-스텝 인버터에 주입하는데 한대의 링크를 사용하면 12-스텝 동작이 24-스텝으로 전환되며 보조 변압기의 1차 권선을 2N(N=1,2,3...)으로 늘리면 24N-스텝으로 전환된다. 본 방식의 타당성을 실험 및 시뮬레이션을 통하여 입증하였다.

• Journal of Electrical Engineering and Technology
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• 제13권6호
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• pp.2178-2186
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• 2018

Online identification of load parameters is the premise of establishing a stable and highly-efficient ICPT (Inductive Coupled Power Transfer) system. However, compared with pure resistive load, precise identification of composite load, such as resistor-inductance load and resistance-capacitance load, is more difficult. This paper proposes a method for detecting the composite load parameters of ICPT system utilizing harmonics. In this system, the fundamental and harmonic wave channel are connected to the high frequency inverter jointly. The load parameter values can be obtained by setting the load equation based on the induced voltage of secondary-side network, the fundamental wave current, as well as the third harmonic current effective value received by the secondary-side current via Fourier decomposition. This method can achieve precise identification of all kinds of load types without interfering the normal energy transmission and it can not only increase the output power, but also obtain higher efficiency compared with the fundamental wave channel alone. The experimental results with the full-bridge LCCL-S type voltage-fed ICPT system have shown that this method is accurate and reliable.