Design of Phase-Controlled Class E Inverter With Asymmetric Circuit Configuration

Kawamoto, Daisuke; Sekiya, Hiroo; Koizumi, Hiroyuki; Sasase, Iwao; Mori, Susumu

doi:10.1109/tcsii.2004.834546

Cited by 18 publications

(4 citation statements)

References 10 publications

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“…By paralleling an inductor with the load resistor, Kazimierczuk and Bui [6] used a matched box concept to solve the load resistance varying problem. To meet the wide load variations and different power output requirement, a phase-controlled approach was proposed by Kawamoto et al [15]. The output power of the parallel system can be controlled by adjusting the phase difference of the two identical inverters to meet the output requirement.…”

Section: Introductionmentioning

confidence: 99%

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Active zero voltage switching tracking controller design for class E inverter to counteract the resonant components shifting

Li¹

2015

IET Power Electronics

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On the basis of zero voltage switching (ZVS) operation, the class E resonant converter provides excellent conversion efficiency even though it works on high frequency. Unfortunately, the ZVS operation is sensitive to the circuit situations. While the circuit components are shifting, the ZVS working will drift around the dominant point and it may fail to work on ZVS. In this study, an active ZVS tracking control method is proposed to cope with the circuit components shifting. On the basis of an exact analysis of the ZVS operation conditions, first a searching procedure is proposed to decide the optimal switching frequency. Next, through the current phase feedback, the active ZVS tracking controller is built to retain the circuit works on optimum ZVS operation by adaptively tuning the switching frequency to counteract the components shifting. In addition to the theoretical analysis and computer simulation, the proposed tracking controller has been applied to implement a 1.3 MHz class E inverter with a field-programmable gate array (FPGA)-based controller.

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Section: Introductionmentioning

confidence: 99%

“…To meet the wide load variations and different power output requirement, a phase‐controlled approach was proposed by Kawamoto et al . [15]. The output power of the parallel system can be controlled by adjusting the phase difference of the two identical inverters to meet the output requirement.…”

Section: Introductionmentioning

confidence: 99%

Active zero voltage switching tracking controller design for class E inverter to counteract the resonant components shifting

Li¹

2015

IET Power Electronics

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“…Various topologies have appeared to expand the application of class E circuit such as class E inverter [3][4] [5][6] [7][8] [9][11] [12] [13], class E DC/DC converter [2] [7][8] [12] and class E rectifier [8] [12]. Also, the class E circuits are applied to RF power amplifier [2][3] [13] [14], induction heating system [4] [14] and RF powering [1][4] [10].…”

Section: Introductionmentioning

confidence: 99%

“…For voltage regulating equipment having wide load variations, the parallel inductor class E circuits are more suitable because of their load insensitive nature. Also, on the other hand, called phase-controlled approach, appears to meet the wide load variations [5][12] [13]. This method is paralleling two identical class E circuits (inverters).…”

Section: Introductionmentioning

confidence: 99%

Exactly analysis of ZVS behavior for class E inverter with resonant components varying

Sue

2011

2011 6th IEEE Conference on Industrial Electronics and Applications

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Class E resonant power amplifier (or inverter) is often applied to design a high frequency switching power converter. The zero voltage switching (ZVS) or zero current switching (ZCS) operation leads the converter to high converting efficiency even the converter works at high frequency. Theoretically, with a high speed power transistor, the class E amplifier can work from several megahertzes to dozen of megahertzes. While the resonant components of class E inverter are varying, the ZVS operation will be shifting around the dominant operating point. In this paper, an exact circuit model is proposed to analyze the circuit behavior for the class E inverter. Unnecessarily mathematical assumption and complicated numerical iteration, the proposed model is easy to analyze the class E circuits in frequency domain. Through this model, a close form formula is proposed to solve the load current and drain-source end voltage of MOSFET at switching instants for steady state without a complicated numerical iterating. By this formula, the optimal and suboptimal conditions for the ZVS operation are expressed in terms of the shifting angle of load current with respect to drain-source voltage. Also, some practical design examples are given to demonstrate the formula calculating results that are good agreement with the numerical iterating results.

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Design of High-Frequency High-Efficiency Converters by Applying Bifurcation Analysis Techniques

Sekiya

2017

Lecture Notes in Networks and Systems

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Design of Phase-Controlled Class E Inverter With Asymmetric Circuit Configuration

Cited by 18 publications

References 10 publications

Active zero voltage switching tracking controller design for class E inverter to counteract the resonant components shifting

Active zero voltage switching tracking controller design for class E inverter to counteract the resonant components shifting

Exactly analysis of ZVS behavior for class E inverter with resonant components varying

Design of High-Frequency High-Efficiency Converters by Applying Bifurcation Analysis Techniques

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