Journal ArticleDOI
DC-Link and Switched Capacitor Control for Varying Coupling Conditions in Inductive Power Transfer System for Unmanned Aerial Vehicles
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TLDR
In this article, a hybrid control method based on dc-link and switched capacitor control with a fixed operating frequency was proposed to solve the main limitations of electric-powered UAVs are their charging range and stability in dynamic conditions.Abstract:
The use of wireless power transfer technology in unmanned aerial vehicle (UAV) systems is rapidly improving in different application areas. The main limitations of electric-powered UAVs are their charging range and stability in dynamic conditions. To solve these, this article proposes a hybrid control method based on dc-link and switched capacitor control with a fixed operating frequency. The dc-link voltage is regulated by the boost power factor correction converter to smoothen the output voltage, and the switched capacitor is used to dynamically compensate for self-inductance variations under dynamic coupling conditions. The output voltage stabilization and near-unity power factor of the input impedance can be achieved by applying the hybrid control method. Therefore, efficiency improvement can be achieved. Furthermore, the proposed control method can also be applied to systems with large coupling variations. To verify the proposed control method, a 500-W prototype was set up in the laboratory, and the experimental results proved that the control method could ensure a stable output voltage with horizontal and vertical offsets of 200 and 62 mm. respectively. Additionally, the results show that the maximum efficiency of the proposed control method is 91.9%, demonstrating that the proposed method effectively improves the efficiency.read more
Citations
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Journal ArticleDOI
Compact and Free-Positioning Omnidirectional Wireless Power Transfer System for Unmanned Aerial Vehicle Charging Applications
TL;DR: In this article , a novel magnetic design with the composite interval-acted parallel- & vertical-flux throw, orthogonal two-dimensional flux pick-up, and power-flow summed output is proposed.
Journal ArticleDOI
A Unipolar-Duty-Cycle Hybrid Control Strategy of Series–Series Compensated IPT System for Constant-Current Output and Efficiency Optimization
TL;DR: In this paper , the authors proposed a hybrid control strategy for a series-series compensated inductive power transfer (IPT) system based on the unipolar-duty-cycle (UDC) modulation technique.
Journal ArticleDOI
A Single-Stage Wireless Power Transfer Converter With Hybrid Compensation Topology in AC Input
TL;DR: In this article , a single-stage WPT converter with constant current (CC) and constant voltage (CV) output and its asymmetric modulation method is proposed, which can realize zero voltage switching (ZVS) and power factor correction (PFC).
A Misalignment Tolerance and Lightweight Wireless Charging System via Reconfigurable Capacitive Coupling for Unmanned Aerial Vehicle Applications
TL;DR: This letter proposes a novel capacitive power transfer system for the unmanned aerial vehicles (UAVs) with lightweight in receivers and robust misalignment tolerance characteristics, and shows that the prototype has low leakage electric flux at the UAV fuselage and can deliver 212.1 W with a dc-to-dc efficiency of 82.5%.
Journal ArticleDOI
Multi-Resonant Frequency Shift Keying: A Novel and Efficient Modulation Scheme for Magnetic Communication
TL;DR: In this paper, a mixed hardware/software approach for efficient frequency shift keying is presented, which allows the full available bandwidth of a receiver to be utilized for data transmission, while all advantages of using a resonant circuit on the transmitter side can be retained.
References
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Journal ArticleDOI
Wireless Power Transfer for Electric Vehicle Applications
Siqi Li,Chunting Chris Mi +1 more
TL;DR: In this paper, the authors reviewed the technologies in the wireless power transfer (WPT) area applicable to electric vehicle (EV) wireless charging, and the obstacles of charging time, range, and cost can be easily mitigated.
Journal ArticleDOI
Modern Trends in Inductive Power Transfer for Transportation Applications
Grant A. Covic,John T. Boys +1 more
TL;DR: In this article, the authors review the development of simple factory automation (FA) IPT systems for both today's complex applications and onward to a much more challenging application-IPT roadway.
Journal ArticleDOI
A Maximum Efficiency Point Tracking Control Scheme for Wireless Power Transfer Systems Using Magnetic Resonant Coupling
TL;DR: In this paper, a maximum efficiency point tracking control scheme is proposed to maximize the system efficiency while regulating the output voltage, which is unique and prominent in that it fixes the operating frequency at the receiving-side resonant frequency and converts both the input voltage and the load resistance at the same time.
Journal ArticleDOI
Automated Impedance Matching System for Robust Wireless Power Transfer via Magnetic Resonance Coupling
TL;DR: An automated impedance matching (IM) system is proposed to increase the efficiency by matching the resonance frequency of the resonator pair to that of the power source, improving the power transfer efficiency.
Journal ArticleDOI
An Adaptive Impedance-Matching Network Based on a Novel Capacitor Matrix for Wireless Power Transfer
TL;DR: In this paper, a novel serial/parallel capacitor matrix is proposed in the transmitter, where the impedance can be automatically reconfigured to track the optimum impedance-matching point in the case of varying distances.