JP Journal of Heat and Mass Transfer
Special Issue II, Advances in Mechanical System and ICT-Convergence, Pages 99 - 107
(December 2020) http://dx.doi.org/10.17654/HMSIII20099 |
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A NEW METHOD OF DELIVERING LARGE AMOUNTS OF POWER USING WIRELESS POWER TRANSMISSION TECHNOLOGY
Lak-Hoon Hwang, Moon-Taek Cho and Seong-Su Kim
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Abstract: In this paper, the possibility of energy transfer through wireless power transmission using an LLC resonant converter is verified through an experiment, and after analyzing the problems, a new method of HQ_PWM is derived. In the proposed wireless power transmission method, since the transmitter and receiver are completely separated, the battery charging current is controlled at the transmitter by receiving wireless feedback of the battery voltage state using wireless communication. In addition, the DC/DC part is configured in a single-stage structure to increase power density and control the charging current of the battery. A single-phase grid-connected inverter type PFC (Power Factor Correction) circuit for both directions is proposed. In addition, to compensate the large ripple voltage at the DC link end, an electrolytic capacitor with a large capacity is used. A simple voltage ripple compensator can replace the electrolytic capacitor. For the optimal design of the converter, the optimum design guide is presented through the converter formula analysis and loss analysis. The optimum ripple voltage reduction circuit was built by deriving the optimum value of the ripple voltage compensator used as the link capacitor and applying the proposed PFC output voltage compensation converter considering the ripple voltage. |
Keywords and phrases: LLC resonant, HQ_PWM, DC/DC, PFC.
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