A Six-Switch Mode Decoupled Wireless Power Transfer System with Dynamic Parameter Self-Adaption

Wu, Wei; Luo, Daqing; Hong, Jianfeng; Tang, Zhe; Chen, W.

doi:10.3390/electronics12102314

Cited by 1 publication

(2 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the literature [30,31], a quasi-resonant control strategy is presented that divides an energy transfer period into two states: the resonant state and the energy-independent injection state. This control strategy provides an effective scheme for power control.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Self-Oscillating Converter Based on Phase Tracking Closed Loop for a Dynamic IPT System

Chen,

Luo,

Hong

et al. 2024

Energies

Self Cite

View full text Add to dashboard Cite

The coupling of converters with resonant networks poses significant challenges for frequency tracking and power control in inductive power transfer (IPT) systems. This paper presents an implementation method that addresses these issues by dividing the system’s operation into two distinct states: self-oscillating and power-injecting. Based on these states, a phase-closed loop is constructed. Within this closed loop, the phase tracking unit detects and tracks frequency drift, while the power regulating unit incorporates an integrator and adopts a control variable to adjust the output power by modifying the duration of the power injecting state. Meanwhile, the oscillating unit operates in the self-oscillating state. Operating in this manner, the system achieves self-oscillation and demonstrates the capability to effectively track and compensate for system variations within a single cycle. A verification prototype has been constructed, and it demonstrates that the converter within it completely decoupled from the resonant network. Experimental results validate that altering the control variable solely affects the duration of the power-injecting state, allowing for independent control of the output power. When the control variable changes from 2.0 V to 3.5 V, the output power changes from 178 W to 519 W while the self-oscillating state remains unchanged. Furthermore, the system accurately tracks frequency changes, even under significant variations in the coupling coefficient or load, without compromising the power injection state. When the air gap changes from 3 cm to 12 cm, the duration of the self-oscillating state changes from 22.1 μs to 26.3 μs, while the power injecting state remains unchanged. This approach exhibits a robust performance, particularly suitable for dynamic IPT systems sensitive to parameter variations.

show abstract

Section: Introductionmentioning

confidence: 99%

“…This decouples the converter from the resonant network, allowing for the independent regulation of power by adjusting the duration of the energy injection state. The limitation of the literature [30,31] lies in the complexity of the system control strategy and the absence of a closed-loop scheme.…”

Section: Introductionmentioning

confidence: 99%