Design, analysis and implementation of a 50 w wireless charger of a charging vest battery

Date

2019

Author

Eren, Merih

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

543
views

0
downloads

Wireless power transfer (WPT) has been a very popular research topic for a variety of applications with power ratings ranging from few watts to several kilowatts. High power levels are mostly used in electric vehicle charging applications whereas lower power level applications are mostly in household appliances, wearable devices and medical implants. Topology, geometries of the transferring and receiving coils and their relative positions are fundamental parts that affect performance of WPT systems. In WPT systems, the most common problem is the degradation of the performance in case of a misalignment of the transferring and receiving coils. Moreover, shielding of the magnetic field is high of importance for on body charging systems like charging vests to meet the electromagnetic field restrictions for human tissue. In this thesis, a 50 W WPT system for battery charging in charging vests is studied in terms of topology selection and coil design. A series-series compensated type inductive power transfer topology is selected and two different coil pairs (transmitter-receiver) that correspond to different resonant frequencies are determined. These configurations are chosen by using a Pareto-front optimization approach that is applied to find out designs with a high efficiency over a wide range of frequencies and misalignments.Furthermore, performances of possible shield designs are studied by using finite element analysis for those two designs. The selected WPT systems are prototyped and tested to validate the analytical and numerical analysis results.

Subject Keywords

Electromagnetic shielding, Keywords: Wireless Power Transfer, Inductive Power Transfer, Wireless Battery Charger, Compensation Topologies, Pareto-front, Electromagnetic Shielding.

URI

http://etd.lib.metu.edu.tr/upload/12625047/index.pdf
https://hdl.handle.net/11511/45371

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Carrier Phase Shift Method of SPWM for Concurrent Wired and Wireless Power Transfer Systems Ayaz, Enes; Altun, Ogün; Keysan, Ozan (2022-01-01) This paper presents an approach for concurrent power transfer to wired and wireless systems using just a single inverter. The approach utilizes a novel carrier phase-shift (CPS) method that independently controls the inverter output voltages at the fundamental and switching frequencies. This proposed method can be a cost-effective solution to wireless power transfer (WPT) systems used in contactless slip rings (CSR), which transfer power to auxiliary loads such as sensors, radars, and IoT devices. There are...
Highly Integrated 3 V Supply Electronics for Electromagnetic Energy Harvesters With Minimum 0.4 V-peak Input Ulusan, Hasan; Zorlu, Ozge; Muhtaroglu, Ali; Külah, Haluk (2017-07-01) This paper presents a self-powered interface enabling battery-like operation with a regulated 3 V output from ac signals as low as 0.4 V-peak, generated by electromagnetic energy harvesters under low frequency vibrations. As the first stage of the 180 nm standard CMOS circuit, harvested signal is rectified through an ac/dc doubler with active diodes powered internally by a passive ac/dc quadrupler. The voltage is boosted in the second stage through a low voltage charge pump stimulated by an on-chip ring osc...
Concurrent operation of wireless power transfer based contactless slip ring and motor drive system with a single converter Ayaz, Enes; Keysan, Ozan; Department of Electrical and Electronics Engineering (2022-9) This thesis presents a novel approach for concurrent power transfer to wired and wireless systems using a single inverter. This proposed approach fits a cost-effective solution to wireless power transfer (WPT) systems used in contactless slip rings (CSR) applications such as sensors, radars, or wind-turbine pitch controls. In conventional systems, there are two separate converters: one is for the motor drive, and the other is for the WPT system. It is proposed that the switching harmonics of the motor drive...
Design and Performance Analysis of a Grid Connected PWM-VSI System Kantar, Emre; Usluer, S. Nadir; Hava, Ahmet Masum (2013-11-30) Pulse-width modulation (PWM) voltage source inverters (VSIs) are favorable interface devices to the power grid for renewable energy systems. This paper deals with the design of the LCL-filter and inverter for the grid-connected VSI. A complete design procedure for both reactive and passive components of LCL-filter is demonstrated with a new iterative approach in selection of the filter inductors. The design process for a two-level VSI is clearly illustrated through an example and the dynamic response is inv...
Robust Design for MISO SWIPT System with Artificial Noise and Cooperative Jamming Chu, Zheng; Le, Tuan Anh; Nguyen, Huan X.; Karamanoglu, Mehmet; Zhu, Zhengyu; Nallanathan, Arumugam; Ever, Enver; Yazıcı, Adnan (2017-12-08) Considering simultaneous wireless information and power transfer (SWIPT), we study a multiple-input-single-output (MISO) secrecy channel which consists of a multi-antenna transmitter and a cooperative jammer (CJ), multiple multi-antenna energy receivers (ERs), i.e., potential eavesdroppers, and multiple single-antenna co-located receivers (CRs). Both transmitter and CJ send the intend signal with artificial noise (AN) and jamming signal to interfere with the ERs. All receivers (CRs and ERs) adopt a power sp...

Citation Formats

M. Eren, “Design, analysis and implementation of a 50 w wireless charger of a charging vest battery,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Electrical and Electronics Engineering., Middle East Technical University, 2019.