Output Voltage Feedback Control Method for Series-Series Compensated Inductive Wireless Power Transfer Link with Varying Primary Capacitor

Vulfovich, A.; Peretz, Mor Mordechai; Kuperman, Alon

doi:10.1109/comcas52219.2021.9629002

Cited by 2 publications

(1 citation statement)

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“…Additionally, a varactor diode [13,14] , voltage variable capacitor [15][16][17], or negative impedance circuit [18] is widely used owing to its high-frequency capability, small size, and full electric control, but has poor high-power handling. For power-electronics-based technology, an active reactance circuit [19][20][21][22][23][24][25][26] or active rectifier [27][28][29][30][31] is used for power factor compensation, which has superior high-power handling, but a lower frequency limit. The use of a DC-DC converter [32] and applying maximumpower point tracking [33][34][35][36][37][38] can adjust the real part of the input impedance; however, since the control is in the DC part, complex conjugate matching can not be realized.…”

Section: Introductionmentioning

confidence: 99%

RF-DC conversion circuit using quadrature hybrid for complex maximum power point tracking

Tanahashi,

Hirayama

2024

IEICE Electron. Express

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This paper proposes the concept of a complex maximum power point tracking (MPPT) circuit for adaptive conjugate impedance matching of wireless power transfer. The proposed circuit consists of an orthogonal power distribution circuit using quadrature hybrid and two rectifier circuits and DC-DC converters. By controlling the input impedance of two DC-DC converters, the complex impedance of RF input can be varied to satisfy complex conjugate matching. This circuit enables high-power and high-frequency handling for matching circuits because no variable device is used in the RF region, and control is done in the DC region. Measurements at 433 MHz confirm that complex impedance in the RF region can be controlled by adjusting the two real impedances.

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