• Journal of Electrical Engineering and Technology
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• 제2권2호
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• pp.249-256
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• 2007

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 the output power control. The proposed half-bridge inverter is based on the resonant frequency-tracking algorithm with the goal of maintaining the unity of the output displacement factor of the load impedance even in varying conditions. In this paper, the operation principle, electrical characteristics, and detailed digital control scheme of the proposed half-bridge resonant inverter are described. The experimental results of the prototype experimental setup to verify the validity of the proposed half-bridge inverter are presented and discussed.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2004년도 추계학술대회 논문집 전기기기 및 에너지변환시스템부문
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• pp.153-156
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• 2004

This paper presents a new circuit topology of the half-bridge resonant inverter. As the proposed half-bridge inverter can be operated in the load freewheeling modes, pulse width modulation (PWM) control method can be used for the output power control. The proposed half-bridge inverter should keep unity output displacement factor under the load-impedance varying conditions, if a new PWM control scheme based on the resonant frequency tracking algorithm is adopted. In this paper, electrical characteristics, and losses analysis of the proposed half-bridge resonant inverter are described. Simulation and experimental results of the prototype experimental setup to verify the validity of the proposed half-bridge resonant inverter are presented and discussed.

• 전자공학회논문지SC
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• 제42권3호
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• pp.71-80
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• 2005

본 논문에서는 새로운 하프브리지 공진형 인버터 토폴로지와 디지털 제어회로를 제안하였다. 제안된 인버터는 부하환류 모드를 제공함으로써 펄스폭 변조방식을 통해 출력을 제어할 수 있다. 따라서 부하측 고유 공진주파수를 추종하는 PWM 제어가 적용될 경우, 부하측 임피던스가 변화하는 조건하에서도 인버터 출력단의 변위율을 항상 1로 유지할 수 있다. 본 논문에서는 제안된 하프브리지 공진형 인버터의 동작원리와 전기적 특성 및 통상의 하프브리지 인버터와 비교한 손실해석에 대하여 고찰하였고, 제안된 알고리즘을 구현하기 위한 디지털 제어회로를 제시하였다. 또한 제안된 인버터의 유효성을 확인하기 위한 실험을 통해서 얻은 결과를 제시하였다.