@article{feng_dayerizadeh_lukic_2021, title={A Coupling-Insensitive X-Type IPT System for High Position Tolerance}, volume={68}, ISSN={["1557-9948"]}, url={https://doi.org/10.1109/TIE.2020.3000116}, DOI={10.1109/TIE.2020.3000116}, abstractNote={The output characteristic of an inductive power transfer (IPT) system is highly susceptible to variations in magnetic coupling. In this article, a primary-side X-type compensation topology is proposed to acquire stable output characteristics against a wide range of magnetic coupling without resorting to tight control and coil design. By introducing the concept and derivation principle for the coupling-insensitive compensation topologies, the X-type network is presented to provide self-regulation ability for primary coil current against variable coupling, thereby enabling steady power transfer in a highly dynamic environment. The design considerations for the passive parameters are elaborated, followed by the comparison with regular compensation methods. Owing to its unique structure and design flexibility, the X-type compensation exhibits a stable output characteristic that is beneficial in enhancing the tolerance to position shifts. Moreover, it also features a wide soft-switching range and more flexible design for the output level range than previous topologies. Experimental results show stable power transfer over a coupling factor of 0.14–0.28, where the power fluctuation is less than 20%. The presented method is seen as a potential solution for low power IPT systems, where high mobility is demanded.}, number={8}, journal={IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS}, publisher={Institute of Electrical and Electronics Engineers (IEEE)}, author={Feng, Hao and Dayerizadeh, Alireza and Lukic, Srdjan M.}, year={2021}, month={Aug}, pages={6917–6926} }
 @article{dayerizadeh_feng_lukic_2020, title={Dynamic Wireless Charging: Reflexive Field Containment Using Saturable Inductors}, volume={56}, ISSN={["1939-9367"]}, url={https://doi.org/10.1109/TIA.2020.2964215}, DOI={10.1109/TIA.2020.2964215}, abstractNote={In dynamic wireless charging applications, segmented transmitter coils transfer power to a moving receiver coil. This article proposes a method in which the field strength in coupled transmitter coils automatically adjusts based on the position of the receiver. Specifically, a saturable inductor is applied to provide a high uncompensated inductive reactance in the uncoupled condition. By exploiting the reflected reactance as the system approaches the maximum coupled condition, the inductor saturates and the field strength in the coupled transmitter coils automatically increases. The field strength is at its peak when the transmitting and receiving coils reach their maximum coupling and sharply decreases when the receiver is decoupled from the transmitter. Consequently, the difference between the coupled and uncoupled currents in the transmitter coil is maximized, resulting in a near six-fold improvement in field containment performance compared to previously reported findings. This allows for system-level efficient power transfer and compliance with electromagnetic emission standards without complex shielding circuits and auxiliary active position detection approaches. We present the analysis, design criteria of the compensation network, and experimental validation for the proposed method.}, number={2}, journal={IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS}, publisher={Institute of Electrical and Electronics Engineers (IEEE)}, author={Dayerizadeh, Alireza and Feng, Hao and Lukic, Srdjan M.}, year={2020}, pages={1784–1792} }
 @inproceedings{dayerizadeh_lukic_2018, title={Saturable inductors for superior reflexive field containment in inductive power transfer systems}, DOI={10.1109/apec.2018.8341557}, abstractNote={Inductive power transfer has many applications that range from electric vehicle charging to robotics. In dynamic applications, it is required that the segmented transmitter coil transfer power to a moving receiver coil. One proposed method to achieve this is using the reflexive field containment approach presented in the literature. In this work, we improve on the concept by adding a saturable inductor to the system to maximize the difference between the coupled and uncoupled currents in the transmitter coil.}, booktitle={Thirty-third annual ieee applied power electronics conference and exposition (apec 2018)}, author={Dayerizadeh, Alireza and Lukic, Srdjan}, year={2018}, pages={3183–3188} }