High-Frequency, High-Power Resonant Inverter With eGaN FET for Wireless Power Transfer

Choi, Joo-Hong; Tsukiyama, Daisuke; Tsuruda, Yoshinori; Rivas-Davila, Juan

doi:10.1109/tpel.2017.2740293

Cited by 97 publications

(26 citation statements)

References 8 publications

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“…M AGNETIC components used in power-electronics applications are subject to complex flux-density waveforms with high-frequency components, which give rise to power losses. Novel low-loss materials such as nanocrystalline [1] and amorphous alloys [2], and soft magnetic composites [3] have been developed to keep the losses in reasonable limits despite the rapidly increasing switching frequencies [4], [5]. However, thin steel laminations still provide the most cost-efficient solution for transformer cores [6], [7] and are also commonly used in electrical machines [8], [9] supplied by power converters.…”

mentioning

confidence: 99%

Simulink Model for PWM-Supplied Laminated Magnetic Cores Including Hysteresis, Eddy-Current, and Excess Losses

Rasilo

Martínez

Fujisaki

et al. 2019

IEEE Trans. Power Electron.

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A new implementation of an iron-loss model for laminated magnetic cores in the MATLAB/Simulink environment is proposed in this paper. The model is based on numerically solving a one-dimensional diffusion problem for the eddy currents in the core lamination and applying an accurate hysteresis model as the constitutive law. An excess loss model is also considered. The model is identified merely based on the catalog data provided by the core material manufacturer. The implementation is validated with analytical and finite-element models and experimentally in the case of a toroidal inductor supplied from a GaN FET full-bridge inverter with 5-500 kHz switching frequencies and a deadtime of 300 ns. Despite the simple identification, a good correspondence is observed between the simulated and measured iron losses, the average difference being 3.3% over the wide switching frequency range. It is shown that accounting for the skin effect in the laminations is significant, in order to correctly model the iron losses at different switching frequencies. Some differences between the measured and simulated results at high switching frequencies are also discussed. The model is concluded to be applicable for designing and analyzing laminated magnetic cores in combination with power-electronics circuits. The Simulink models are openly available.

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confidence: 99%

Simulink Model for PWM-Supplied Laminated Magnetic Cores Including Hysteresis, Eddy-Current, and Excess Losses

Rasilo

Martínez

Fujisaki

et al. 2019

IEEE Trans. Power Electron.

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“…The volume and weight of the resonant components are inversely proportional to the frequency. Thus, increasing the frequency by 10 s of MHz leads to weight lessening and power density enhancement [35]. Secondly, for the CPT system, the value of inductance is inversely proportional to the angular frequency in which the high frequency gives a low value of inductance, based on Equation (24).…”

Section: Design Guidelines and Optimization Of The Shielded-cpt Systemmentioning

confidence: 99%

Scaling-Factor and Design Guidelines for Shielded-Capacitive Power Transfer

2020

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This paper introduces scaling-factor and design guidelines for shielded-capacitive power transfer (shielded-CPT) systems, offering a simplified design process, coupling-structure optimization, and consideration of safety. A novel scaling-factor-analysis method is proposed by determining the configuration of the coupling structure that improves system safety and increases operating efficiency while minimizing the gap between the shield and the coupler plate. The inductor-series resistance is also analyzed to study the loss efficiency in the shielded-CPT system. The relationship among the shield-coupler gap, distance between the couplers, conductive-plate size, and delivered power is examined and presented. The proposed method is validated by implementing the shielded-CPT system with hardware and the result suggests that the proposed method can be used to design shielded-CPT systems with scaling-factor and safety considerations.

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“…High frequency power amplified, such as class D, class E, class EF, and class φ converters [44], can also be used to realize a CPT system. For example, the circuit topology of a CPT system based on the class E converter is shown in Figure 14.…”

Section: Power Amplifier Based Topologymentioning

confidence: 99%

A Review on the Recent Development of Capacitive Wireless Power Transfer Technology

2017

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Capacitive power transfer (CPT) technology is an effective and important alternative to the conventional inductive power transfer (IPT). It utilizes high-frequency electric fields to transfer electric power, which has three distinguishing advantages: negligible eddy-current loss, relatively low cost and weight, and excellent misalignment performance. In recent years, the power level and efficiency of CPT systems has been significantly improved and has reached the power level suitable for electric vehicle charging applications. This paper reviews the latest developments in CPT technology, focusing on two key technologies: the compensation circuit topology and the capacitive coupler structure. The comparison with the IPT system and some critical issues in practical applications are also discussed. Based on these analyses, the future research direction can be developed and the applications of the CPT technology can be promoted.

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High-Frequency, High-Power Resonant Inverter With eGaN FET for Wireless Power Transfer

Cited by 97 publications

References 8 publications

Simulink Model for PWM-Supplied Laminated Magnetic Cores Including Hysteresis, Eddy-Current, and Excess Losses

Simulink Model for PWM-Supplied Laminated Magnetic Cores Including Hysteresis, Eddy-Current, and Excess Losses

Scaling-Factor and Design Guidelines for Shielded-Capacitive Power Transfer

A Review on the Recent Development of Capacitive Wireless Power Transfer Technology

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